CN106826149A - Radial cams loading and the low-cycle fatigue cracking apparatus of Split link cracking - Google Patents
Radial cams loading and the low-cycle fatigue cracking apparatus of Split link cracking Download PDFInfo
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- CN106826149A CN106826149A CN201710017965.5A CN201710017965A CN106826149A CN 106826149 A CN106826149 A CN 106826149A CN 201710017965 A CN201710017965 A CN 201710017965A CN 106826149 A CN106826149 A CN 106826149A
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- connecting rod
- cam disc
- plug
- cracking
- splined shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P17/00—Metal-working operations, not covered by a single other subclass or another group in this subclass
- B23P17/02—Single metal-working processes; Machines or apparatus therefor
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- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Radial cams loading and the low-cycle fatigue cracking apparatus of Split link cracking, including base, base is left, right both sides are fixed with four root posts, four root posts upside is fixed with crossbeam, servomotor has been left and right symmetrically arranged on crossbeam, the cam disc elevating mechanism connection that servomotor and splined shaft top are installed, splined shaft bottom is connected with decelerating through motor actuating unit, splined shaft middle part is connected with main workbench, the upper and lower ends of plug are clashed into by the upper end cam disc and corresponding lower end cam disc of main workbench simultaneously, and then to the crank pin end pore reverse cyclic loadings with prefabricated splitter, the low stress fatigue for completing connecting rod tip and gonnecting rod body is separated, the present invention has green energy conservation, it is high in machining efficiency, have a wide range of application, the good advantage of cross section quality.
Description
Technical field
Processing technique field is cracked with Split link, and in particular to a kind of Split link splits the invention belongs to internal combustion engine
Radial cams loading and the low-cycle fatigue cracking apparatus of solution.
Background technology
Con-rod fracture splitting is a kind of new technology of Machining of Connecting Rod, using Theory of Fracture Mechanics, first on the inside of crank pin end pore
Prefabricated splitter, formed initial crack, then by crack process equipment to big end hole medial surface apply radial load, make crackle by
Endoporus outwards constantly extends, until crack completely, it is finally that gonnecting rod body and end cap is at a fully engaged at the plane of disruption, penetrate bolt simultaneously
It is screwed to and requires moment of torsion.Typical case's cracking process equipment includes that " upper Wedged " equipment of ALFING companies of Germany and U.S.'s Ford are public
" pull-down " equipment of department, is mounted with the force-increasing mechanism being made up of expansion set and wedge-shaped mandrel in crank pin end pore
(U.S.Pat.No.5,503,317), plus Jilin University's patent promotes wedge-shaped mandrel and then promotes expansion set to transport by liquid presses piston pole
It is dynamic, crank pin end pore inwall is born radial load and swollen disconnected.
It is above-mentioned several to have following characteristics on con-rod fracture splitting patented technology and equipment both at home and abroad：Cracking technology is using wedge shape
The active force that hydraulic jack is produced is applied directly to perfect aspect in expansion block and is separated with lid by block；Axially loaded power is, is passed through
Hydraulic cylinder is loaded；Swollen disconnected mode is swollen disconnected once to load.
But these technologies and equipment have the following disadvantages：Due to using hydraulic pressure semi-static load, hydraulic circuit caliber, valve to lead to
Footpath, pump discharge, hydraulic cylinder parameter etc. can influence to crack the loading velocity of oil cylinder, and research shows, because of the company that loading velocity causes
The seam broken phenomenon that bar is swollen to have no progeny is the subject matter of the type technique；Once loading is risen disconnected, and the disconnected power that rises is big, to master cylinder pressure requirement
It is higher；The processing of single connecting rod can only be carried out, lysis efficiency is relatively low；Cracking material is powder metallurgy breaking link, is applicable model
Enclose narrow.
The edge cam of the Split link that Xi'an Communications University Dong Yuan wise men propose promotes the low-cycle fatigue cracking of many mandrels
Equipment (CN201510633267.9) is proposed for internal combustion engine Split link and axially promoted mandrel using edge cam to even
The big end reverse cyclic loadings of bar, the new technology that connecting rod tip and gonnecting rod body are separate is made using low-cycle fatigue stress and stress concentration effect.
And the low-cycle fatigue cracking apparatus that edge cam promotes many mandrels are gone out according to the technological design.The patented technology is solved and once added
Carry swollen disconnected, swollen disconnected power is big, master cylinder pressure requirement problem higher, while being driven using motor, it is to avoid due to accurate using hydraulic pressure
Static loading, hydraulic circuit caliber, valve latus rectum, pump discharge, hydraulic cylinder parameter setting be complicated and the connecting rod that causes by loading velocity
The problem of the swollen seam broken having no progeny, while the equipment can simultaneously process multigroup connecting rod, improves Machining of Connecting Rod efficiency, and expand
The scope that the cracking processing of connecting rod material is chosen.But the technology still has the following disadvantages：Load mode is still for radially
Loading, loading velocity is too fast to make the mode of fatigue loading be changed into the cracking of semi-static load, make con-rod fracture splitting too fast, section matter
Amount is poor；During being loaded to connecting rod, what connecting rod was subject to is asymmetric force.
The content of the invention
In order to overcome the shortcoming of above-mentioned technology, object of the present invention is to provide a kind of radial direction of Split link cracking
Cam load with low-cycle fatigue cracking apparatus, with green energy conservation, it is high in machining efficiency, have a wide range of application, that cross section quality is good is excellent
Point.
In order to achieve the above object, the technical scheme taken of the present invention is：
Radial cams loading and the low-cycle fatigue cracking apparatus, including base 9, base 9 left and right two of Split link cracking
Side is fixed with four root posts 8, and the upside of four root post 8 is fixed with crossbeam 22, servomotor 1 has been left and right symmetrically arranged on crossbeam 22,
First lifting wheel 2 is housed, the first lifting wheel 2 is carried by pierce tap 3 with second on upper box 21 on the output shaft of servomotor 1
Rise wheel 29 to connect, the two ends of upper box 21 or so are engaged by guide groove 20 with four root posts 8；
The output end connection of the middle part of upper box 21 and the connection of the upper end of splined shaft 4, the lower end of splined shaft 4 and clutch 17, clutch
Input and the upper output terminal of Flywheel disc 10 connection of device 17, the lower output side of Flywheel disc 10 pass through shaft coupling 13, decelerator
11 are connected with the output end of variable-frequency motor 12, and the control end of variable-frequency motor 12 is connected with the signal output part of switch board 15；
The middle part of splined shaft 4 passes through connecting rod placement platform 18, the upside of the connecting rod placement platform 18 multigroup fixture 6 of arrangement, in fixture 6
Place connecting rod 25, the prefabricated V-arrangement crackle groove 33 of the big end hole of connecting rod 25, embedded plug 19 in the big end hole of connecting rod 25；The upper end of splined shaft 4 leads to
Cross bearing 28 to be flexibly connected with upper end cam disc 5, the downside of connecting rod placement platform 18 is arranged symmetrically lower end cam disc 7, and lower end is convex
Wheel disc 7 is connected with splined shaft 4；Upper end cam disc 5 and corresponding lower end cam disc 7 clash into the upper and lower ends of plug 19 simultaneously.
The described upside of connecting rod placement platform 18 is connected with upper end workbench 24, the upside of the upper end workbench 24 multigroup cunning of arrangement
Rail 31, is equipped with sliding block 32 on slide rail 31, the upper end of sliding block 32 is fixed with ram 30；
The downside of connecting rod placement platform 18 is arranged symmetrically multigroup slide rail 31 with upper end workbench 24, and sliding block is housed on slide rail 31
32, the upper end of sliding block 32 is fixed with ram 30；
Upper end cam disc 5 and corresponding lower end cam disc 7 clash into the upper and lower ends of plug 19 by ram 30 simultaneously.
Cleavage moveable sheath 23 and cleavage stable sheath 26, cleavage moveable sheath 23 and cleavage stable sheath 26 are inserted in the described big end hole of connecting rod 25
Middle embedded plug 19, plug 19 passes to connecting rod tip 34 by the just cyclic loading of cleavage moveable sheath 23.
Described variable-frequency motor 12 can be replaced using hydraulic motor.
The radial cams loading of described Split link cracking and the cracking technology of low-cycle fatigue cracking apparatus, including with
Lower step：
Variable-frequency motor 12 drives upper end cam disc 5 and corresponding lower end cam disc 7 to clash into plug 19 simultaneously by splined shaft 4
Upper and lower ends, it is different according to upper end cam 5, the design curve of lower end cam 7 to the reverse cyclic loadings of plug 19, weekly to plug 19
For several times, cyclic loading is passed to connecting rod tip 34 by plug 19, and the prefabricated V-arrangement crackle groove 33 of the big end hole of connecting rod 25 was transmitted for loading
The cyclic loading come produces stress concentration at precrack, after multiple rotary is forged, completes connecting rod tip 34 and gonnecting rod body
35 low stress is separated.
Beneficial effects of the present invention are：
(1) the cracking load for needing to apply effectively has dropped in the present invention.Radial loaded simultaneously, it is to avoid loading velocity mistake
Fast problem.
(2) plane of disruption is not plastically deformed significantly after cracking, and cross section quality is good.
(3) many connecting rods are forged simultaneously, improve lysis efficiency.
(4) driven using variable-frequency motor 12, it is to avoid due to using hydraulic pressure semi-static load, hydraulic circuit caliber, valve to lead to
Complicated and because of the swollen seam broken having no progeny of connecting rod that loading velocity causes the problem of footpath, pump discharge, hydraulic cylinder parameter setting.
(5) existed by controlling upper end cam disc 5 and the curve of lower end cam disc 7 and connecting rod 25 to be arranged symmetrically to solve connecting rod 25
The asymmetric problem of stress during forging.
(6) range of choice of con-rod fracture splitting material is expanded, the material such as stainless steel high for plastic hinge can also split
Preferable cross section quality is obtained after solution.
The present invention has wider application prospect, with green energy conservation, it is high in machining efficiency, have a wide range of application, cross section quality
Good advantage, represents the new developing direction of green cracking.
Brief description of the drawings
Fig. 1 is the structural front view of the embodiment of the present invention.
Fig. 2 is the structural front view of the main workbench of the embodiment of the present invention.
Fig. 3 is the structure top view of the main workbench of the embodiment of the present invention.
Fig. 4 is the structure sectional view of present clip and connecting rod.
Fig. 5 is the structural representation of connecting rod 25 of the present invention containing prefabricated splitter 33.
Specific embodiment
The present invention is described in further detail with accompanying drawing with reference to embodiments.
Reference picture 1, radial cams loading and the low-cycle fatigue cracking apparatus, including base 9, base of Split link cracking
9 arranged on left and right sides are fixed with four root posts 8, and the upside of four root post 8 is fixed with crossbeam 22, has been left and right symmetrically arranged on crossbeam 22 and watched
Motor 1 is taken, the first lifting wheel 2 is housed on the output shaft of servomotor 1, the first lifting wheel 2 is by pierce tap 3 and upper box 21
The second lifting wheel 29 connect, the two ends of upper box 21 or so are engaged by guide groove 20 with four root posts 8, servomotor 1, first
Lifting wheel 2,3 and second lifting wheel of pierce tap 29 constitute cam disc elevating mechanism；
The output end connection of the middle part of upper box 21 and the connection of the upper end of splined shaft 4, the lower end of splined shaft 4 and clutch 17, clutch
Input and the upper output terminal of Flywheel disc 10 connection of device 17, the lower output side of Flywheel disc 10 is by the first coupking shaft 16 and connection
The upper output terminal of axle device 13 is connected, and the lower input of shaft coupling 13 is connected by the second coupking shaft 14 and the upper output terminal of decelerator 11
Connect, the lower input of decelerator 11 is connected with the output end of variable-frequency motor 12, control end and the switch board 15 of variable-frequency motor 12
Signal output part connection, switch board 15 be arranged on the side of base 9, clutch 17, Flywheel disc 10, the first coupking shaft 16, second
Coupking shaft 14, shaft coupling 13, decelerator 11 and variable-frequency motor 12 constitute decelerating through motor actuating unit, and variable-frequency motor 12 can be used
Hydraulic motor replaces.
Reference picture 2, Fig. 3 and Fig. 4, the middle part of splined shaft 4 pass through connecting rod placement platform 18, the upside of connecting rod placement platform 18 arrangement
Multigroup fixture 6, places connecting rod 25 in fixture 6, the big end hole of connecting rod 25 prefabricated V-arrangement crackle groove 33 is inserted in the big end hole of connecting rod 25 and split
Solution dynamic set 23 and cleavage stable sheath 26, embedded plug 19 in cleavage moveable sheath 23 and cleavage stable sheath 26；The upside of connecting rod placement platform 18 is solid
Upper end workbench 24 is connected to, the upside of upper end workbench 24 arrangement multigroup slide rail 31 is equipped with sliding block 32, the upper end of sliding block 32 on slide rail 31
It is fixed with ram 30；The downside of connecting rod placement platform 18 is arranged symmetrically multigroup slide rail 31 with upper end workbench 24, on slide rail 31
Equipped with sliding block 32, the upper end of sliding block 32 is fixed with ram 30；
The upper end of splined shaft 4 is flexibly connected by bearing 28 with upper end cam disc 5, and upper end cam disc 5 can be de- with splined shaft 4
From, facilitating picking and placeing for connecting rod 25, the downside of connecting rod placement platform 18 is arranged symmetrically lower end cam disc 7, lower end cam disc 7 and spline
Axle 4 is connected；Upper end cam disc 5 and corresponding lower end cam disc 7 clash into the upper and lower ends of plug 19 by ram 30 simultaneously, even
Bar placement platform 18, upper end workbench 24, upper end cam disc 5 and lower end cam disc 7 constitute main workbench.
The radial cams loading of described Split link cracking and the cracking technology of low-cycle fatigue cracking apparatus, including with
Lower step：
Variable-frequency motor 12 drives upper end cam disc 5 and corresponding lower end cam disc 7 to pass through ram simultaneously by splined shaft 4
30 upper and lower ends for clashing into plugs 19, to the reverse cyclic loadings of plug 19, according to upper end cam disc 5, the design curve of lower end cam disc 7 not
Together, plug 19 is loaded for several times weekly, cyclic loading is passed to connecting rod tip 34, connecting rod 25 by plug 19 by cleavage moveable sheath 23
The prefabricated V-arrangement crackle groove 33 of big end hole, the cyclic loading passed over by cleavage moveable sheath 23 produces stress concentration in precrack,
After multiple rotary is forged, the low stress for completing connecting rod tip 34 and gonnecting rod body 35 is separated.
Operation principle of the invention is：
Present invention utilizes stress concentration effect and fatigue fracture principle, driven simultaneously by decelerating through motor actuating unit
End cam disk 5 and lower end cam disc 7 are rotated by certain rotating speed, one action circulation include rise, closely stop, rise, far stop,
In backhaul totally 5 stages, while clashing into the upper and lower side of plug 19 by ram 30, plug 19 radially does micro-displacement, extrudes
23 pairs of big end hole reverse cyclic loadings of the connecting rod 25 with prefabricated splitter 33 of cleavage moveable sheath, complete connecting rod tip 34 and gonnecting rod body 35
Low stress fatigue separate, as shown in figure 5, with green energy conservation, it is high in machining efficiency, have a wide range of application, that cross section quality is good is excellent
Point；Meanwhile, upper end cam disc 5 and lower end cam disc 7 are arranged symmetrically, and make the stand under load of plug 19 symmetrically and evenly, improve disconnected after cracking
Face quality.Splined shaft 4 can be departed from by clutch 17 and decelerating through motor actuating unit, it is ensured that the frequency conversion when connecting rod 25 is picked and placeed
Motor 12 can not be stalled, and continue to accelerate Flywheel disc 10, carry out energy storage.Flywheel disc 10 reduces speed wave when equipment is run
It is dynamic.Upper box 21 can be by cam disc elevating mechanism hoisting depth.
Claims (5)
1. the radial cams of Split link cracking is loaded and low-cycle fatigue cracking apparatus, including base (9), it is characterised in that：
Base (9) arranged on left and right sides is fixed with four root posts (8), and four root posts (8) upside is fixed with crossbeam (22), left on crossbeam (22)
The right side is symmetrically installed with servomotor (1), and the first lifting wheel (2), the first lifting wheel (2) are housed on the output shaft of servomotor (1)
It is connected with the second lifting wheel (29) on upper box (21) by pierce tap (3), upper box (21) left and right two ends pass through guide groove
(20) it is engaged with four root posts (8)；
The output end connection of upper box (21) middle part and the connection of splined shaft (4) upper end, splined shaft (4) lower end and clutch (17),
Input and Flywheel disc (10) upper output terminal connection of clutch (17), the lower output side of Flywheel disc (10) pass through shaft coupling
(13), decelerator (11) is connected with the output end of variable-frequency motor (12), control end and the switch board (15) of variable-frequency motor (12)
Signal output part is connected；
Splined shaft (4) middle part passes through connecting rod placement platform (18), connecting rod placement platform (18) the upside multigroup fixture (6) of arrangement, folder
Connecting rod (25), the prefabricated V-arrangement crackle groove (33) of connecting rod (25) big end hole, embedded plug in connecting rod (25) big end hole are placed in tool (6)
(19)；Splined shaft (4) upper end is flexibly connected by bearing (28) with upper end cam disc (5), connecting rod placement platform (18) downside
Lower end cam disc (7) is arranged symmetrically, lower end cam disc (7) is connected with splined shaft (4)；Upper end cam disc (5) and corresponding lower end
Cam disc (7) is while clash into the upper and lower ends of plug (19).
2. the radial cams of Split link cracking according to claim 1 is loaded and low-cycle fatigue cracking apparatus, its spy
Levy and be：Described connecting rod placement platform (18) upside is connected with upper end workbench (24), upper end workbench (24) upside arrangement
Multigroup slide rail (31), is equipped with sliding block (32) on slide rail (31), ram (30) is fixed with sliding block (32)；
Connecting rod placement platform (18) downside is arranged symmetrically multigroup slide rail (31) with upper end workbench (24), and slide rail is equipped with (31)
Sliding block (32), is fixed with ram (30) on sliding block (32)；
Upper end cam disc (5) and corresponding lower end cam disc (7) by ram (30) while clash into up and down the two of plug (19)
End.
3. the radial cams of Split link cracking according to claim 1 is loaded and low-cycle fatigue cracking apparatus, its spy
Levy and be：Insert cleavage moveable sheath (23) and cleavage stable sheath (26) in described connecting rod (25) big end hole, cleavage moveable sheath (23) and split
Embedded plug (19) in Xie Ding sets (26), plug (19) passes to connecting rod tip by cleavage moveable sheath (23) just cyclic loading
(34)。
4. the radial cams of Split link cracking according to claim 1 is loaded and low-cycle fatigue cracking apparatus, its spy
Levy and be：Described variable-frequency motor (12) can be replaced using hydraulic motor.
5. the radial cams loading and the cracking of low-cycle fatigue cracking apparatus of Split link cracking according to claim 1
Technique, it is characterised in that comprise the following steps：
Variable-frequency motor (12) drives upper end cam disc (5) and corresponding lower end cam disc (7) while clashing into core by splined shaft (4)
The upper and lower ends of rod (19), to plug (19) reverse cyclic loadings, according to upper end cam disc (5), lower end cam disc (7) design curve not
Together, plug (19) is loaded for several times weekly, cyclic loading is passed to connecting rod tip (34) by plug (19), connecting rod tip (34) is pre-
V-arrangement crackle groove (33) processed, the cyclic loading for passing over produces stress concentration at precrack, after multiple rotary is forged,
Connecting rod tip (34) is completed to be separated with the low stress of gonnecting rod body (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710017965.5A CN106826149B (en) | 2017-01-10 | 2017-01-10 | Radial cams load and the low-cycle fatigue cracking apparatus of Split link cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710017965.5A CN106826149B (en) | 2017-01-10 | 2017-01-10 | Radial cams load and the low-cycle fatigue cracking apparatus of Split link cracking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106826149A true CN106826149A (en) | 2017-06-13 |
| CN106826149B CN106826149B (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710017965.5A Active CN106826149B (en) | 2017-01-10 | 2017-01-10 | Radial cams load and the low-cycle fatigue cracking apparatus of Split link cracking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398692A (en) * | 2017-07-19 | 2017-11-28 | 江苏大学 | A kind of processing unit (plant) and method of connecting rod resonance Assisted Cleavage |
| CN111842612A (en) * | 2019-10-11 | 2020-10-30 | 丽水市盛裕机械制造有限公司 | Automatic cracking equipment for crank connecting rod |
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| GB2320308A (en) * | 1996-10-25 | 1998-06-17 | Honda Motor Co Ltd | Pre-fracture laser formation of a notch in a connecting rod |
| CN1397392A (en) * | 2002-05-20 | 2003-02-19 | 吉林大学 | Technology and apparatus for machining linking-rod of engine |
| CN1569373A (en) * | 2004-04-26 | 2005-01-26 | 吉林大学 | Processing apparatus for initial cracking tank for engine connecting rod |
| CN201346712Y (en) * | 2009-01-07 | 2009-11-18 | 云南西仪工业股份有限公司 | Fracturing clamp for fracturing connection rod |
| CN102601580A (en) * | 2011-01-24 | 2012-07-25 | 日产自动车株式会社 | Connecting rod for an engine and method of making thereof |
| CN203875272U (en) * | 2014-05-21 | 2014-10-15 | 西安交通大学 | Four-hammer-cyclic-loading and low-cycle-fatigue blanking mechanism with 90-degree phase difference |
| CN204621488U (en) * | 2015-05-05 | 2015-09-09 | 南京工程学院 | A kind of support of use for laboratory fractured connecting rod is broken device |
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2017
- 2017-01-10 CN CN201710017965.5A patent/CN106826149B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2320308A (en) * | 1996-10-25 | 1998-06-17 | Honda Motor Co Ltd | Pre-fracture laser formation of a notch in a connecting rod |
| CN1397392A (en) * | 2002-05-20 | 2003-02-19 | 吉林大学 | Technology and apparatus for machining linking-rod of engine |
| CN1569373A (en) * | 2004-04-26 | 2005-01-26 | 吉林大学 | Processing apparatus for initial cracking tank for engine connecting rod |
| CN201346712Y (en) * | 2009-01-07 | 2009-11-18 | 云南西仪工业股份有限公司 | Fracturing clamp for fracturing connection rod |
| CN102601580A (en) * | 2011-01-24 | 2012-07-25 | 日产自动车株式会社 | Connecting rod for an engine and method of making thereof |
| CN203875272U (en) * | 2014-05-21 | 2014-10-15 | 西安交通大学 | Four-hammer-cyclic-loading and low-cycle-fatigue blanking mechanism with 90-degree phase difference |
| CN204621488U (en) * | 2015-05-05 | 2015-09-09 | 南京工程学院 | A kind of support of use for laboratory fractured connecting rod is broken device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398692A (en) * | 2017-07-19 | 2017-11-28 | 江苏大学 | A kind of processing unit (plant) and method of connecting rod resonance Assisted Cleavage |
| CN111842612A (en) * | 2019-10-11 | 2020-10-30 | 丽水市盛裕机械制造有限公司 | Automatic cracking equipment for crank connecting rod |
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| Publication number | Publication date |
|---|---|
| CN106826149B (en) | 2019-01-08 |
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