CN103978076A - Bending and shaping device for exhaust manifold - Google Patents
Bending and shaping device for exhaust manifold Download PDFInfo
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- CN103978076A CN103978076A CN201410233083.9A CN201410233083A CN103978076A CN 103978076 A CN103978076 A CN 103978076A CN 201410233083 A CN201410233083 A CN 201410233083A CN 103978076 A CN103978076 A CN 103978076A
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- exhaust manifold
- groove
- bending
- rotating disc
- rotary handle
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Abstract
The invention discloses a bending and shaping device for an exhaust manifold. The bending and shaping device comprises a rotary disc, a pipe bending groove is mounted on the rotary disc, a plurality of pressing-down blocks are mounted in a pressing-down seat, guiding grooves matched with the pipe bending groove are reserved in the pressing-down blocks, blind holes are formed in the guiding grooves, rollers are rotationally arranged in the blind holes, through holes are formed in two lateral inner sides of the blind holes, rotating shafts of the rollers and the through holes are in clearance fit, rubber pads are mounted between the rollers and bottoms of the blind holes, the pipe bending groove is composed of a movable portion and a fixed portion, the fixed portion is rotationally arranged on the rotary disc via a revolving shaft, the movable portion is provided with a protrusion, a groove is formed in the fixed portion, and the protrusion and the groove are matched with each other. Since the blind holes are formed in the guiding grooves and the rollers mounted in the blind holes are higher than bottoms of the guiding grooves, protrusive round faces on the rollers can counteract gathered wrinkles at bending-in positions of the exhaust manifold and push metal to extend so as to guarantee smoothness of the bending positions, and arc inner sides of the exhaust manifold are avoided from wrinkling, bend rebound and the like.
Description
Technical field
The present invention relates to a kind of exhaust manifold bending tool, specifically refer to the device for exhaust manifold brake forming.
Background technology
The exhaust angle of automotive emission pipeline is the insoluble problem of specialized factory always.By inquiry, the angle direction of car and light weight domestic automobile exhaust pipeline is to be generally parallel to backward ground, and the angle of high-power transport vehicle and agri-vehicle discharge duct is folded to ground.From the angle of environmental protection, according to existing tail gas exhaust pipe of motor vehicle road angle direction design and Principle of Mechanical Designing, also there is no to stipulate the angle making new advances discharged to method for designing.
In the process of the discharge duct of high-power transport vehicle, the pipe bender on the market conventionally adopting carries out the bending of blast pipe, and still, pipe bender great majority are on the market that angle of bend is 90 °, when using this type of pipe bender, and cannot one-shot forming.From industrial analysis, common bend pipe defect mainly contains following several form thus: circular arc place becomes that tube wall thickness is excessive outside flat serious (ellipse), circular arc, the outer lateral bending of circular arc splits, wrinkling and bending springback etc. inside circular arc.Along with the difference of elbow radius, mode and position that front four kinds of defects produce are different, and not necessarily occur simultaneously, and the elastic recoil of curved workpieces is inevitable.The existence of bend pipe defect can produce very large negative effect to bending the quality of pipe fitting.Pipe thickness attenuation, must reduce the ability that pipe fitting bears interior pressure, affects its serviceability; The distortion of crooked tubing section configuration, may cause that area of section reduces on the one hand, thereby increases the mobile resistance of fluid, also affects on the other hand the functional effect of pipe fitting in structure; Pipe material inner wall is wrinkling not only can weaken pipe intensity, and easily causes flow media speed uneven, produces eddy current and crooked position and gathers dirt, and impact bends the normal use of pipe fitting; Rebound phenomenon must make the angle of bend of tubing be greater than predetermined angular, thereby reduces bending process precision.For meeting the process requirements of blast pipe, staff also needs the pipe fitting of bending to proofread, in check and correction process, because manual operation precision is lower, easily cause pipe fitting directly to fracture, again or the bending part of pipe fitting there will be obvious depression or crack, and then cause blast pipe to be scrapped, and in operating process, the time of expending is long, waste of material is serious, has also greatly increased workman's labour intensity.
Summary of the invention
The object of the present invention is to provide the device for exhaust manifold brake forming, the Bending Processing of easy to exhaust manifold, reduces artificial labour intensity, reduces the generation of the phenomenons such as wrinkling inside the circular arc of exhaust manifold and bending springback.
Object of the present invention is achieved through the following technical solutions:
Device for exhaust manifold brake forming, comprise rotating disc, bend pipe groove is installed on described rotating disc, at described rotating disc upper hinge, be connected with rotary handle, one end of rotary handle is provided with connecting rod, the other end of rotary handle is connected with cylinder, also comprise the down pressing seat and the exhaust manifold folder that are arranged on rotating disc, in described down pressing seat, be provided with dovetail groove, the end of connecting rod is slidably arranged in dovetail groove, a plurality of lower lock blocks are installed in down pressing seat, on lower lock block, have the gathering sill matching with bend pipe groove, in described gathering sill, offer blind hole, in blind hole, rotate and be provided with roller, the both sides inwall of blind hole is provided with through hole, the turning cylinder of described roller coordinates with via clearance, between roller and blind hole bottom, rubber blanket is also installed, described bend pipe groove is comprised of movable part and fixed part, and fixed part is rotated and is arranged on rotating disc by rotating shaft, on described movable part, is provided with projection, has groove on fixed part, and projection cooperatively interacts with groove.When the present invention works, exhaust manifold is passed from the space that dovetail groove and bend pipe groove form, by exhaust manifold, press from both sides one end of exhaust manifold is fixed, start cylinder and promote rotary handle, rotary handle drives down pressing seat to move down, under the acting in conjunction of the gathering sill on lower lock block and bend pipe groove, exhaust manifold completes bending operation, rotary handle of the present invention can move horizontally on rotating disc, the end of the connecting rod on rotary handle coordinates with the dovetail groove in down pressing seat, when rotary handle presses down, the connecting rod segment distance that can slide in dovetail groove, stressed even to guarantee in down pressing seat, a plurality of lower lock blocks of installing in down pressing seat increase the contact area of gathering sill and exhaust manifold bending part, and guarantee bending part stressed evenly with reduce that exhaust manifold directly fractures and or the bending part of exhaust manifold occurs significantly depression or the phenomenon in crack occurs, reduce the scrappage of exhaust manifold, in the machining accuracy that improves exhaust manifold, can also greatly reduce artificial labour intensity, indirectly reduced production cost, in gathering sill, offer blind hole, the bottom land that roller exceeds gathering sill is installed in blind hole, and it is wrinkling in gathering of interior crook that the protruding disc of roller can be offset exhaust manifold, promote metal and extend to guarantee the smooth of bending part, avoid occurring the phenomenons such as wrinkling inside circular arc and bending springback, guarantee exhaust manifold stability in use, the turning cylinder of roller coordinates with via clearance, and between blind hole bottom and roller, rubber blanket is installed, when contacting with exhaust manifold at roller and interacting, roller can be made displacement to a certain extent to slow down the stress that exhaust manifold is caused, rubber blanket is by the stresses counteract producing, guarantee exhaust manifold in Forging Process in knee inside and outside circle cambered surface stressed evenly, prevent that knee from cracking or strength decreased, described bend pipe groove is comprised of movable part and fixed part, fixed part is rotated and is arranged on rotating disc by rotating shaft, on described movable part, be provided with projection, on fixed part, have groove, projection cooperatively interacts with groove, and when the blast pipe of different model is carried out to bending, movable part is flexibly connected with fixed part, be that movable part can be changed at any time, greatly increased usability of the present invention.
Also comprise a plurality of torsionsprings, the two ends of described torsionspring are connected with rotating disc, rotary handle respectively.The two ends of the torsionspring of installing connect respectively rotating disc and rotary handle, and by after exhaust manifold bending, torsionspring elasticity recovery, drives down pressing seat homing, facilitates device to proceed new outlet elbow operation.
Described fixed part is major arc groove, and described movable part is minor arc groove, and the angle that the vertical edge of described minor arc groove and end points to the tangent line of cambered surface becomes is 50 °, 60 ° or 85 °.Described fixed part is major arc groove, and described movable part is minor arc groove.Because blast pipe angle of bend changes less, during work, down pressing seat is over against the bent tube section of blast pipe, movable part is minor arc groove, make the bending of blast pipe in realizing more among a small circle under the impetus of cylinder, to guarantee the intensity of bending part, avoid bending part because significantly depression occurs stressed concentrating, guarantee the bending quality of blast pipe; As preferably, when the angle becoming when the vertical edge of minor arc groove and end points to the tangent line of cambered surface is 50 °, 60 ° or 85 °, the minimum bend angle that is blast pipe is 40 °, 30 °, 15 °, by minimum bend angle, blast pipe can guarantee best intensity at bending sweep in period, has effectively avoided in use because bending part is corroded, seriously causing blast pipe to be scrapped.
Also comprise Anti-wrinkling board, one end of described Anti-wrinkling board is connected with exhaust manifold folder, and the other end of Anti-wrinkling board and the excircle of exhaust manifold match.Or raw material pipe fitting that relative wall thickness less high for some Materials Yield Limits, Anti-wrinkling board is set when bending, Anti-wrinkling board one end is connected with exhaust manifold folder, its other end mates with the excircle of exhaust manifold, when raw material pipe fitting enters the clamping timing of exhaust manifold, Anti-wrinkling board agrees with exhaust manifold excircle, make Anti-wrinkling board at the place, point of contact with crooked groove, set up a linearity sector at raw material pipe fitting, can effectively prevent that raw material pipe fitting its periphery when bending from producing fine wrinkle, guarantees the quality of pipe fitting bending.
The present invention compared with prior art, has following advantage and beneficial effect:
1, the present invention is for the device of exhaust manifold brake forming, in gathering sill, offer blind hole, the bottom land that roller exceeds gathering sill is installed in blind hole, and it is wrinkling in gathering of interior crook that the protruding disc of roller can be offset exhaust manifold, promote metal and extend to guarantee the smooth of bending part, avoid occurring the phenomenons such as wrinkling inside circular arc and bending springback, guarantee exhaust manifold stability in use; Described bend pipe groove is comprised of movable part and fixed part, fixed part is rotated and is arranged on rotating disc by rotating shaft, on described movable part, be provided with projection, on fixed part, have groove, projection cooperatively interacts with groove, and when the blast pipe of different model is carried out to bending, movable part is flexibly connected with fixed part, be that movable part can be changed at any time, greatly increased usability of the present invention;
2, the present invention is for the device of exhaust manifold brake forming, the minimum bend angle of blast pipe is 40 °, 30 °, 15 °, by minimum bend angle, blast pipe can guarantee best intensity at bending sweep in period, has effectively avoided in use because bending part is corroded, seriously causing blast pipe to be scrapped;
3, the present invention is for the device of exhaust manifold brake forming, Anti-wrinkling board is set when bending, Anti-wrinkling board one end is connected with exhaust manifold folder, its other end mates with the excircle of exhaust manifold, when raw material pipe fitting enters the clamping timing of exhaust manifold, Anti-wrinkling board agrees with exhaust manifold excircle, makes Anti-wrinkling board at the place, point of contact with crooked groove, set up a linearity sector at raw material pipe fitting, can effectively prevent that raw material pipe fitting its periphery when bending from producing fine wrinkle.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present invention, forms the application's a part, does not form the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is structural representation of the present invention;
Fig. 2 is A-A figure of the present invention;
Fig. 3 is the structural representation of lower lock block;
The structural representation of Fig. 4 bend pipe groove;
Fig. 5, Fig. 6, Fig. 7 are the structural representation of minor arc groove;
Mark and corresponding parts title in accompanying drawing:
1-rotating disc, 2-bend pipe groove, 3-rotating shaft, 4-cylinder, 5-bearing pin, 6-rotary handle, 7-connecting rod, 8-down pressing seat, 9-exhaust manifold folder, 10-dovetail groove, 11-lower lock block, 12-torsionspring, 13-exhaust manifold, 14-Anti-wrinkling board, 15-through hole, 16-blind hole, 17-roller, 18-rubber blanket, 19-turning cylinder, 20-gathering sill, 21-major arc groove, 22-groove, 23-projection, 24-minor arc groove.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and exemplary embodiment of the present invention and explanation thereof are only for explaining the present invention, not as a limitation of the invention.
Embodiment 1
As shown in Figures 1 to 4, the present invention is for the device of exhaust manifold brake forming, comprise rotating disc 1, on described rotating disc 1, bend pipe groove 2 is installed, at described rotating disc 1 chain connection, there is rotary handle 6, one end of rotary handle 6 is provided with connecting rod 7, the other end of rotary handle 6 is connected with cylinder 4, also comprise the down pressing seat 8 and the exhaust manifold folder 9 that are arranged on rotating disc 1, in described down pressing seat 8, be provided with dovetail groove 10, the end of connecting rod 7 is slidably arranged in dovetail groove 10, a plurality of lower lock blocks 11 are installed in down pressing seat 8, on lower lock block 11, have the gathering sill 20 matching with bend pipe groove 2, in described gathering sill 20, offer blind hole 16, the interior rotation of blind hole 16 is provided with roller 17, the both sides inwall of blind hole 16 is provided with through hole 15, turning cylinder 19 and through hole 15 matched in clearance of described roller 17, between roller 17 and blind hole 16 bottoms, rubber blanket 18 is also installed, described bend pipe groove 2 is comprised of movable part and fixed part, and fixed part is rotated and is arranged on rotating disc 1 by rotating shaft, is provided with projection 23 on described movable part, has groove 22 on fixed part, and projection 23 cooperatively interacts with groove 22.When the present invention works, the space that exhaust manifold 13 is formed from dovetail groove 10 and bend pipe groove 2, pass, by exhaust manifold, pressing from both sides 9 fixes one end of exhaust manifold 13, start cylinder 4 and promote rotary handle 6, rotary handle 6 drives down pressing seat 8 to move down, under gathering sill 20 on lower lock block 11 and the acting in conjunction of bend pipe groove 2, exhaust manifold 13 completes bending operation, rotary handle 6 of the present invention can move horizontally by bearing pin 5 on rotating disc 1, the end of the connecting rod 7 on rotary handle 6 coordinates with the dovetail groove 10 in down pressing seat 8, when rotary handle 6 presses down, connecting rod 7 can be at interior slip one segment distance of dovetail groove 10, stressed even to guarantee in down pressing seat 8, a plurality of lower lock blocks 11 of installing in down pressing seat 8 increase the contact area of gathering sill 20 and exhaust manifold 13 bending parts, and guarantee bending part stressed evenly with reduce that exhaust manifold 13 directly fractures and or the bending part of exhaust manifold 13 occurs significantly depression or the phenomenon in crack occurs, reduce the scrappage of exhaust manifold 13, in the machining accuracy that improves exhaust manifold 13, can also greatly reduce artificial labour intensity, indirectly reduced production cost, in gathering sill 20, offer blind hole 16, the bottom land that roller 17 exceeds gathering sill 20 is installed in blind hole 16, and it is wrinkling in gathering of interior crook that the protruding disc of roller 17 can be offset exhaust manifold 13, promote metal and extend to guarantee the smooth of bending part, avoid occurring the phenomenons such as wrinkling inside circular arc and bending springback, guarantee exhaust manifold 13 stability in use, turning cylinder 19 and through hole 15 matched in clearance of roller 17, and between blind hole 16 bottoms and roller 17, rubber blanket 18 is installed, when roller 17 contacts and interacts with exhaust manifold 13, roller 17 can be made displacement to a certain extent to slow down the stress that exhaust manifold 13 is caused, rubber blanket 18 is by the stresses counteract producing, guarantee exhaust manifold 13 in Forging Process in knee inside and outside circle cambered surface stressed evenly, prevent that knee from cracking or strength decreased, described bend pipe groove 2 is comprised of movable part and fixed part, fixed part is rotated and is arranged on rotating disc 1 by rotating shaft 3, on described movable part, be provided with projection 23, on fixed part, have groove 22, projection 23 cooperatively interacts with groove 22, and when the exhaust manifold 13 to different model carries out bending, movable part is flexibly connected with fixed part, be that movable part can be changed at any time, greatly increased usability of the present invention.
Embodiment 2
As shown in Figure 1 to Figure 2, the present embodiment, on the basis of embodiment 1, also comprises a plurality of torsionsprings 12, and the two ends of described torsionspring 12 are connected with rotating disc 1, rotary handle 6 respectively.The two ends of the torsionspring 12 of installing connect respectively rotating disc 1 and rotary handle 6, and by after exhaust manifold 13 bendings, torsionspring 12 elasticity recoveries, drive down pressing seat 8 homings, facilitate device to proceed new exhaust manifold 13 bend pipe operations.
Embodiment 3
As shown in Figures 5 to 7, the present embodiment is on the basis of embodiment 1, described fixed part is major arc groove 21, and described movable part is minor arc groove 24, and the angle that the vertical edge of described minor arc groove 24 and end points to the tangent line of cambered surface becomes is 50 °, 60 ° or 85 °.Because exhaust manifold 13 angle of bend change less, during work, down pressing seat 8 is over against the bent tube section of exhaust manifold 13, movable part is minor arc groove 24, make the bending of exhaust manifold 13 in realizing more among a small circle under the impetus of cylinder 4, to guarantee the intensity of bending part, avoid bending part because significantly depression occurs stressed concentrating, guarantee the bending quality of exhaust manifold 13; As preferably, when the angle becoming when the vertical edge of minor arc groove 24 and end points to the tangent line of cambered surface is 50 °, 60 ° or 85 °, the minimum bend angle that is exhaust manifold 13 is 40 °, 30 °, 15 °, by minimum bend angle, exhaust manifold 13 can guarantee best intensity at bending sweep in period, has effectively avoided in use because bending part is corroded, seriously causing exhaust manifold 13 to be scrapped.
Embodiment 4
As shown in Figure 1, the present embodiment, on the basis of embodiment 1, also comprises Anti-wrinkling board 14, and one end of described Anti-wrinkling board 14 is connected with exhaust manifold folder 9, and the excircle of the other end of Anti-wrinkling board 14 and exhaust manifold 13 matches.Or raw material pipe fitting that relative wall thickness less high for some Materials Yield Limits, Anti-wrinkling board 14 is set when bending, Anti-wrinkling board 14 one end are connected with exhaust manifold folder 9, its other end mates with the excircle of exhaust manifold 13, when raw material pipe fitting enters exhaust manifold folder 9 fixedly time, 14 of Anti-wrinkling boards agree with exhaust manifold 13 excircles, make Anti-wrinkling board 14 at the place, point of contact with crooked groove 2, set up a linearity sector at raw material pipe fitting, can effectively prevent that raw material pipe fitting its periphery when bending from producing fine wrinkle, guarantees the quality of pipe fitting bending.
The above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. for the device of exhaust manifold brake forming, comprise rotating disc (1), bend pipe groove (2) is installed on described rotating disc (1), it is characterized in that: at described rotating disc (1) upper hinge, be connected with rotary handle (6), one end of rotary handle (6) is provided with connecting rod (7), the other end of rotary handle (6) is connected with cylinder (4), also comprise the down pressing seat (8) and the exhaust manifold folder (9) that are arranged on rotating disc (1), in described down pressing seat (8), be provided with dovetail groove (10), the end of connecting rod (7) is slidably arranged in dovetail groove (10), a plurality of lower lock blocks (11) are installed in down pressing seat (8), on lower lock block (11), have the gathering sill (14) matching with bend pipe groove (2), in described gathering sill (20), offer blind hole (16), in blind hole (16), rotate and be provided with roller (17), the both sides inwall of blind hole (16) is provided with through hole (15), the turning cylinder (19) of described roller (17) and through hole (15) matched in clearance, between roller (17) and blind hole (16) bottom, rubber blanket (18) is also installed, described bend pipe groove (2) is comprised of movable part and fixed part, fixed part is rotated and is arranged on rotating disc (1) by rotating shaft (3), on described movable part, be provided with projection (23), have groove (22) on fixed part, projection (23) cooperatively interacts with groove (22).
2. the device for exhaust manifold brake forming according to claim 1, is characterized in that: also comprise a plurality of torsionsprings (12), the two ends of described torsionspring (12) are connected with rotating disc (1), rotary handle (6) respectively.
3. the device for exhaust manifold brake forming according to claim 1, it is characterized in that: described fixed part is major arc groove (2), described movable part is minor arc groove (24), and the angle that the vertical edge of described minor arc groove (24) and end points to the tangent line of cambered surface becomes is 50 °, 60 ° or 85 °.
4. the device for exhaust manifold brake forming according to claim 1, it is characterized in that: also comprise Anti-wrinkling board (14), one end of described Anti-wrinkling board (14) is connected with exhaust manifold folder (9), and the excircle of the other end of Anti-wrinkling board (14) and exhaust manifold (13) matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410233083.9A CN103978076B (en) | 2014-05-29 | 2014-05-29 | For the device of exhaust manifold brake forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410233083.9A CN103978076B (en) | 2014-05-29 | 2014-05-29 | For the device of exhaust manifold brake forming |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103978076A true CN103978076A (en) | 2014-08-13 |
| CN103978076B CN103978076B (en) | 2015-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410233083.9A Expired - Fee Related CN103978076B (en) | 2014-05-29 | 2014-05-29 | For the device of exhaust manifold brake forming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103978076B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785590A (en) * | 2015-04-13 | 2015-07-22 | 成都陵川特种工业有限责任公司 | Bend forming method for exhaust manifold |
| CN106424245A (en) * | 2015-06-12 | 2017-02-22 | 福建省雾精灵环境科技有限公司 | Omni-directional continuous pipe bending device |
| CN109877228A (en) * | 2019-04-10 | 2019-06-14 | 上海兴韬汽车配件有限公司 | It is a kind of for making the mold of bend pipe |
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| JPH07256345A (en) * | 1994-03-24 | 1995-10-09 | Osamu Kato | Tube bending method and guide device for tube to be bent used in the method |
| CN2293399Y (en) * | 1997-05-07 | 1998-10-07 | 杨利平 | Hydraulic lever type bending machine for workpiece |
| CN2928303Y (en) * | 2006-06-28 | 2007-08-01 | 浙江金马逊机械有限公司 | Anti-crease mold set for pipe bender |
| CN200998741Y (en) * | 2006-12-25 | 2008-01-02 | 三角轮胎股份有限公司 | Valve cock bending apparatus |
| CN203842978U (en) * | 2014-05-29 | 2014-09-24 | 成都陵川特种工业有限责任公司 | Bending processing structure for exhaust manifold |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1378982A1 (en) * | 1984-09-18 | 1988-03-07 | И. И. Минеев | Tube bending mill |
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2014
- 2014-05-29 CN CN201410233083.9A patent/CN103978076B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07256345A (en) * | 1994-03-24 | 1995-10-09 | Osamu Kato | Tube bending method and guide device for tube to be bent used in the method |
| CN2293399Y (en) * | 1997-05-07 | 1998-10-07 | 杨利平 | Hydraulic lever type bending machine for workpiece |
| CN2928303Y (en) * | 2006-06-28 | 2007-08-01 | 浙江金马逊机械有限公司 | Anti-crease mold set for pipe bender |
| CN200998741Y (en) * | 2006-12-25 | 2008-01-02 | 三角轮胎股份有限公司 | Valve cock bending apparatus |
| CN203842978U (en) * | 2014-05-29 | 2014-09-24 | 成都陵川特种工业有限责任公司 | Bending processing structure for exhaust manifold |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785590A (en) * | 2015-04-13 | 2015-07-22 | 成都陵川特种工业有限责任公司 | Bend forming method for exhaust manifold |
| CN106424245A (en) * | 2015-06-12 | 2017-02-22 | 福建省雾精灵环境科技有限公司 | Omni-directional continuous pipe bending device |
| CN106424245B (en) * | 2015-06-12 | 2018-01-02 | 福建省雾精灵环境科技有限公司 | Comprehensive continuous swan neck system |
| CN109877228A (en) * | 2019-04-10 | 2019-06-14 | 上海兴韬汽车配件有限公司 | It is a kind of for making the mold of bend pipe |
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| Publication number | Publication date |
|---|---|
| CN103978076B (en) | 2015-09-30 |
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Granted publication date: 20150930 Termination date: 20160529 |