CN109013819A - A kind of production method of ripple bend pipe - Google Patents
A kind of production method of ripple bend pipe Download PDFInfo
- Publication number
- CN109013819A CN109013819A CN201811125925.3A CN201811125925A CN109013819A CN 109013819 A CN109013819 A CN 109013819A CN 201811125925 A CN201811125925 A CN 201811125925A CN 109013819 A CN109013819 A CN 109013819A
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- Prior art keywords
- bend pipe
- die
- molding
- lower die
- ripple
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Classifications
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- 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
-
- 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
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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
The invention discloses a kind of production methods of ripple bend pipe, solving traditional ripple bend pipe production method is mostly manually to open up the first escape groove and the second escape groove after producing by mold again, it is be easy to cause the skimble-scamble problem of ripple bend pipe specification, its key points of the technical solution are that: it comprises the following specific steps that: S1, die casting；S2, bending；S3, bulging: by expanding die by ripple bend pipe bulging；The expanding die includes the upper die holder set gradually from top to bottom, shaping upper, molding lower die and lower die holder, forming tank is offered on shaping upper, lower forming tank is offered in molding lower die, upper forming tank and lower forming tank dock to form die cavity, first seal and second seal are provided in molding lower die, inlet is offered in first seal, the first molding mold insert is provided on shaping upper, the second molding mold insert is provided in molding lower die, without that can guarantee the unification of ripple bend pipe specification by manually slotting.
Description
Technical field
The present invention relates to automobile exhaust pipe technical field, in particular to a kind of production method of ripple bend pipe.
Background technique
Automobile exhaust ripple bend pipe is installed in the exhaust pipe before engine exhaust branch pipe and silencer, makes entirely to be vented
System is in Flexible spacecraft, to play the role of damping noise reduction, facilitate installation and extend the exhausting silencer system service life.For rationally benefit
With inner space of vehicle, ripple bend pipe in actual use, needs to avoid automotive interior pipeline to a certain degree.
Ripple bend pipe as shown in Fig. 1 comprising the first pipeline section 51, the second pipeline section 53 and by the two turn to be connected
Pipeline section 52 is connected, 51 length of the first pipeline section of ripple bend pipe is greater than 53 length of the second pipeline section, and the first pipeline section 51 and the second pipeline section
Angle is greater than 90 ° between 53, connects and offers the first escape groove 54 and the second escape groove 55 on pipeline section 52, wherein the first escape groove
54 depth is greater than the depth of the second escape groove 55, and ripple bend pipe opens up energy by the first escape groove 54 and the second escape groove 55
It is enough that automotive interior pipeline is avoided.
Traditional ripple bend pipe production method is mostly manually to open up the first escape groove after producing by mold again
54 and second escape groove 55, it be easy to cause the disunity of ripple bend pipe specification.
Summary of the invention
The object of the present invention is to provide a kind of production methods of ripple bend pipe, without that can guarantee wave by manually slotting
The unification of line bend pipe specification.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of production method of ripple bend pipe, comprises the following specific steps that:
S1, die casting: straight tube is formed by die casting；
S2, bending: straight tube is bent to form the ripple bend pipe with the first pipeline section, the second pipeline section and bridge piece；
S3, bulging: by expanding die by ripple bend pipe bulging；
The expanding die includes the upper die holder set gradually from top to bottom, shaping upper, molding lower die and lower die holder, it is described at
Through forming tank is offered in type upper mold, run through in the molding lower die and offer lower forming tank, the shaping upper and at
After the docking of type lower die, upper forming tank and lower forming tank dock to form die cavity, and the molding lower die is punished in the both-side opening of die cavity
It is not provided with the first seal and second seal for blocking ripple bend pipe both ends open respectively, is opened in the first seal
Equipped with the inlet injected for bulging liquid, it is provided on the shaping upper and protrudes from limitation when molding rooved face makes bulging
The expansion of ripple bend pipe is provided in the molding lower die and protrudes from down so that the first escape groove molding first molding mold insert
Molding rooved face makes limitation ripple bend pipe expansion when bulging so that the second escape groove molding second forms mold insert.
By using above-mentioned technical proposal, by die casting by straight tube die cast, straight tube is then subjected to press-bending shape
Corrugated bend pipe, then by ripple bend pipe be put into molding lower die lower forming tank in after, by shaping upper with form lower die dock, with
The opening of die cavity two sides is blocked by first seal and second seal afterwards, bulging liquid passes through the inlet in first seal
In into expanding die and full of, by ripple bend pipe bulging, the first molding mold insert and second forms mold insert limitation inside ripple bend pipe
The expansion of ripple bend pipe is to guarantee ripple without passing through artificial for the first escape groove and the second evacuation Slot shaping
Bend pipe specification it is neat.
Preferably, the first molding mold insert be column construction and be pierced by shaping upper and upper die holder upper surface it is flat
Together, the first molding mold insert is movably arranged on shaping upper.
By using above-mentioned technical proposal, since the first evacuation groove depth for needing to open up is deeper, shaping upper and at
When type lower die is docked, the first molding mold insert can offset with ripple bend pipe impacts the molding of shaping upper and molding lower die,
And second forms mold insert since depth is shallower, to shaping upper and will not form lower die in shaping upper and molding lower die docking
Molding impact, by being movably arranged on the first molding mold insert on shaping upper, molding when, shaping upper can be first
To mobile far from molding lower die direction, after starting bulging by external oil cylinder by first form mold insert be pushed into it is equal with upper die holder
Together, the bulging liquid inside ripple bend pipe can be formed to the outside pressure of ripple bend pipe and with the first molding mold insert and second at this time
Mold insert matches the first escape groove of synthesis type and the second escape groove, to complete the bulging of ripple bend pipe.
Preferably, being provided with locating piece in the molding lower die, offers on the shaping upper and be embedded in for locating piece
Locating slot.
By using above-mentioned technical proposal, by being provided with locating piece and locating slot, shaping upper and molding can be facilitated
Lower die alignment, so that it is guaranteed that the normal use of expanding die.
Preferably, four edges of the molding lower die offer auxiliary positioning slot, it is arranged on the shaping upper
There is the auxiliary positioning block in insertion auxiliary positioning slot.
It can be in use process by the design of auxiliary positioning block and auxiliary positioning slot by using above-mentioned technical proposal
In further facilitate shaping upper and form lower die alignment.
Preferably, the locating piece is positioned close to the side of connection pipeline section.
By using above-mentioned technical proposal, bulging liquid enters from the side of ripple bend pipe, is turned at connection pipeline section,
The pressure being subject at connection pipeline section is bigger compared with than at the first pipeline section and the second pipeline section, curved by the way that locating piece to be positioned close to bend
The side of pipe, can be in the anti-pressure ability for promoting connecting tube fragment position.
Preferably, the first seal and second seal are the hydraulic cylinder that piston rod has sealing ring, it is described
Inlet is provided on the sealing ring of first seal.
By using above-mentioned technical proposal, by setting piston rod with sealing for first seal and second seal
The hydraulic cylinder of circle blocks die cavity both-side opening after capable of facilitating shaping upper and molding lower die molding.
Preferably, side wall of the molding lower die close to the second pipeline section side is vertical with the length direction of the second pipeline section.
By using above-mentioned technical proposal, the cylinder body of hydraulic cylinder convenient length with the second pipeline section after being arranged in molding lower die
Degree direction is consistent, and the moving direction of piston rod and the length direction of the second pipeline section can be made to be consistent, thus raising pair
The leakproofness of second pipeline section opening.
Preferably, the bulging liquid is water or oil.
It no longer needs to clean ripple bend pipe after shaping when bulging liquid is water by using above-mentioned technical proposal；
When bulging liquid is oil, one layer of oil film can be formed on the surface of ripple bend pipe, ripple bend pipe is protected.
In conclusion the invention has the following advantages:
1. it is curved ripple can be limited in the Bulging Process of ripple bend pipe by the first molding mold insert of setting and the second molding mold insert
The expansion of pipe, thus the first escape groove of molding and the second escape groove, without being able to maintain ripple bend pipe specification by artificial
Unification；
2. by being movably arranged on the first molding mold insert on shaping upper, the first molding mold insert can be to separate before bulging
Die cavity direction is mobile, avoids the first molding mold insert from protruding into mold cavity and impacts to the molding of shaping upper and molding lower die,
In Bulging Process, by external oil cylinder by first molding mold insert upper surface be depressed into it is concordant with upper die holder upper surface, the first one-tenth
Type mold insert can offset with ripple bend pipe, thus the first escape groove of molding.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of ripple bend pipe；
Fig. 2 is the structural schematic diagram of expanding die；
Fig. 3 is the explosive view one of expanding die；
Fig. 4 is the explosive view two of expanding die；
Fig. 5 is the explosive view three of expanding die.
In figure, 1, upper die holder；2, shaping upper；21, upper forming tank；22, the first molding mold insert；23, locating slot；24, auxiliary
Help locating piece；3, lower die is formed；31, lower forming tank；32, the second molding mold insert；33, locating piece；34, auxiliary positioning slot；35,
One sealing element；351, inlet；36, second seal；4, lower die holder；51, the first pipeline section；52, pipeline section is connected；53, the second pipe
Section；54, the first escape groove；55, the second escape groove.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment one
Referring to Fig.1, a kind of production method of ripple bend pipe, comprises the following specific steps that:
S1, die casting: straight tube is formed by die casting；
S2, bending: straight tube is bent to form the ripple bend pipe with the first pipeline section, the second pipeline section and bridge piece；
S3, bulging: by expanding die by ripple bend pipe bulging.
Die casting in S1 forms straight tube by side core drawing structure, and die cast is the conventional skill of those skilled in the art
Art means, and be not new wound point of the invention, therefore not at this to repeating the internal structure of die casting and working principle more；
Bending machining is carried out to straight tube using bending machine in S2；
Referring to Fig. 2, the expanding die in S3 includes the upper die holder 1 set gradually from top to bottom, shaping upper 2, molding 3 and of lower die
Lower die holder 4.
Referring to Fig. 3 and Fig. 4, offered on shaping upper 2 through the upper forming tank 21 for going out 2 side wall of shaping upper, under molding
Offered on mould 3 through going out to form the lower forming tank 31 of lower die 3, after shaping upper 2 and molding lower die 3 are docked upper forming tank 21 and
The lower docking of forming tank 31 forms die cavity.
The port of first pipeline section 51 of ripple bend pipe and shaping upper 2 and the side wall flush for forming lower die 3, ripple bend pipe
The port of second pipeline section 53 is located on the inside of die cavity, and shaping upper 2 and molding lower die 3 are close to 53 port of the second pipeline section and the second pipe
The length direction of section 53 is perpendicular.
In conjunction with Fig. 5, it is provided with that protrude from limitation ripple bend pipe when 21 surface of forming tank makes bulging swollen on shaping upper 2
It is swollen so that the molding first molding mold insert 22 of the first escape groove 51, be provided in the molding lower die 3 and protrude from lower molding
Limitation ripple bend pipe expansion when 31 surface of slot makes bulging so that the molding second molding mold insert 32 of the second escape groove 52,
In first molding mold insert 22 be column construction and straight up through go out shaping upper 2, in Bulging Process first molding mold insert
22 one end and ripple bend pipe offset the upper surface flush of the other end and upper die holder 1.
Molding lower die 3 is respectively arranged with 35 He of first seal for blocking two openings respectively at the both-side opening of die cavity
Second seal 36, wherein first seal 35 and second seal 36 are the hydraulic cylinder that piston rod has sealing ring, the
It is offered on the sealing ring of one sealing element 35 and enters inlet 351 inside ripple bend pipe, bulging in the present embodiment for bulging liquid
Liquid is water, without being cleaned after the completion of ripple bend pipe bulging.
Molding lower die 3 is provided with locating piece 33 close to the side of connection pipeline section 52, offers on shaping upper 2 for locating piece
Four edges of the upper locating slot 23 of 33 insertions, molding lower die 3 are additionally provided with auxiliary positioning slot 34, four corners of shaping upper 2
Place is provided with the auxiliary positioning block 24 in the corresponding auxiliary locating slot 34 of insertion.
The specifically used method of expanding die:
After ripple bend pipe after press-bending is placed in the lower forming tank 31 of molding lower die 3, then by shaping upper 2 and form lower die
Two closure of openings of ripple bend pipe, subsequent bulging liquid are passed through the first sealing by 3 docking, first seal 35 and second seal 36
Inlet 351 on part 35, which enters, carries out bulging inside ripple bend pipe, form mold insert for first by external oil cylinder at the same time
22 be depressed into it is equal with upper die holder 1 can form the first escape groove 54, the second molding mold insert 32 formed in lower die 3 can form
Second escape groove 55.
Embodiment two
The difference is that, bulging liquid is oil with embodiment one, can form oil on the surface of ripple bend pipe after the completion of bulging
Film, to be protected to ripple bend pipe.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (8)
1. a kind of production method of ripple bend pipe, which is characterized in that comprise the following specific steps that:
S1, die casting: straight tube is formed by die casting；
S2, bending: straight tube bends to form the ripple with the first pipeline section (51), the second pipeline section (53) and bridge piece (52) curved
Pipe；
S3, bulging: by expanding die by ripple bend pipe bulging；
The expanding die includes the upper die holder (1) set gradually from top to bottom, shaping upper (2), molding lower die (3) and lower die
Seat (4), through offering forming tank (21) on the shaping upper (2), run through on the molding lower die (3) offer it is lower at
After type groove (31), the shaping upper (2) and molding lower die (3) docking, upper forming tank (21) and lower forming tank (31) dock shape
At die cavity, which is characterized in that the molding lower die (3) is respectively arranged at the both-side opening of die cavity opens ripple bend pipe both ends
The mouth first seal (35) and second seal (36) that block respectively are offered for bulging liquid on the first seal (35)
The inlet (351) of injection is provided on the shaping upper (2) and protrudes from limitation when forming tank (21) surface makes bulging
The expansion of ripple bend pipe is set on the molding lower die (3) so that the first escape groove (51) molding first molding mold insert (22)
Be equipped with protrude from limitation ripple bend pipe expansion when lower forming tank (31) surface makes bulging so that the second escape groove (52) at
Second molding mold insert (32) of type.
2. a kind of production method of ripple bend pipe according to claim 1, which is characterized in that the first molding mold insert
It (22) is column construction and, described first molding mold insert (22) work concordant with the upper surface of upper die holder (1) that is pierced by shaping upper (2)
It is dynamic to be arranged on shaping upper (2).
3. a kind of production method of ripple bend pipe according to claim 2, which is characterized in that on the molding lower die (3)
It is provided with locating piece (33), the locating slot (23) for locating piece (33) insertion is offered on the shaping upper (2).
4. a kind of production method of ripple bend pipe according to claim 3, which is characterized in that molding lower die (3)
Four edges offer auxiliary positioning slot (34), are provided in insertion auxiliary positioning slot (34) on the shaping upper (2)
Auxiliary positioning block (24).
5. a kind of production method of ripple bend pipe according to claim 4, which is characterized in that locating piece (33) setting
In the side close to connection pipeline section (52).
6. a kind of production method of ripple bend pipe according to claim 5, which is characterized in that the shaping upper (2) and
It is vertical with the length direction of the second pipeline section (53) to form the side wall of lower die (3) close to the second pipeline section (53) side.
7. a kind of production method of ripple bend pipe according to claim 1, which is characterized in that the first seal (35)
It is the hydraulic cylinder that piston rod has sealing ring with second seal (36).
8. a kind of production method of ripple bend pipe according to claim 1, which is characterized in that the bulging liquid be water or
Oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811125925.3A CN109013819B (en) | 2018-09-26 | 2018-09-26 | Production method of corrugated elbow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811125925.3A CN109013819B (en) | 2018-09-26 | 2018-09-26 | Production method of corrugated elbow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109013819A true CN109013819A (en) | 2018-12-18 |
| CN109013819B CN109013819B (en) | 2023-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811125925.3A Active CN109013819B (en) | 2018-09-26 | 2018-09-26 | Production method of corrugated elbow |
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| CN (1) | CN109013819B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113182395A (en) * | 2021-04-29 | 2021-07-30 | 佛山市南海区显威五金塑料有限公司 | Hydraulic bulging processing technology and bulging die for stainless steel faucet bent pipe |
| CN113814290A (en) * | 2020-09-01 | 2021-12-21 | 杜亚玲 | Production process of thin-wall boosting extrusion pipe and thin-wall boosting extrusion pipe |
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| CN207222670U (en) * | 2017-06-29 | 2018-04-13 | 上海工程技术大学 | A kind of reducing abnormity pipe part expanding die |
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