CN106826149B - Radial cams load and the low-cycle fatigue cracking apparatus of Split link cracking - Google Patents
Radial cams load and the low-cycle fatigue cracking apparatus of Split link cracking Download PDFInfo
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- CN106826149B CN106826149B CN201710017965.5A CN201710017965A CN106826149B CN 106826149 B CN106826149 B CN 106826149B CN 201710017965 A CN201710017965 A CN 201710017965A CN 106826149 B CN106826149 B CN 106826149B
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- connecting rod
- cam disc
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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 load and the low-cycle fatigue cracking apparatus of Split link cracking, including pedestal, pedestal is left, right two sides are fixed with four columns, crossbeam is fixed on the upside of four columns, servo motor has been left and right symmetrically arranged on crossbeam, servo motor is connected with the cam disc elevating mechanism that splined shaft top is installed, splined shaft lower part is connected with decelerating through motor power mechanism, main workbench is connected in the middle part of splined shaft, hit the upper and lower ends of plug simultaneously by the upper end cam disc of main workbench and corresponding lower end cam disc, and then to the crank pin end pore reverse cyclic loadings for having prefabricated splitter, complete the low stress fatigue separation of connecting rod tip and gonnecting rod body, 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
The invention belongs to internal combustion engine Split links to crack processing technique field, and in particular to a kind of Split link is split
Radial cams load and the low-cycle fatigue cracking apparatus of solution.
Background technique
Con-rod fracture splitting is a kind of new process 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 cracking process equipment to big end hole medial surface apply radial force, make crackle by
Inner hole constantly extends outward, until cracking completely, finally at a fully engaged at the plane of disruption by gonnecting rod body and end cap, penetrates bolt simultaneously
It is screwed to and requires torque.Typical case's cracking process equipment includes " upper Wedged " equipment and U.S.'s Ford public affairs of German ALFING company
" pull-down " equipment of department is mounted with the force-increasing mechanism being made of expansion set and wedge-shaped mandrel in crank pin end pore
(U.S.Pat.No.5,503,317) adds Jilin University's patent to push wedge-shaped mandrel to push expansion set fortune by liquid presses piston pole
It is dynamic, so that crank pin end pore inner wall is born radial load and swollen disconnected.
Above-mentioned several to have following characteristics about con-rod fracture splitting patented technology and equipment both at home and abroad: cracking technology is all made of wedge shape
The active force that hydraulic cylinder generates is applied directly to the separation of perfect aspect and lid in expansion block by block；It is axially loaded power, passes through
Hydraulic cylinder is loaded；Swollen disconnected mode is once to load swollen break.
But these technologies and equipment have the disadvantage that, due to using hydraulic semi-static load, hydraulic circuit caliber, valve are logical
Diameter, pump discharge, hydraulic cylinder parameter etc. will affect the loading velocity of cracking oil cylinder, studies have shown that because connecting caused by loading velocity
The seam broken phenomenon that bar is swollen to have no progeny is the main problem of the type technique；Once load 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 lower；Cracking material is powder metallurgy breaking link, is applicable in model
It encloses narrow.
The edge cam for the Split link that Xi'an Communications University Dong Yuan wise man proposes pushes the low-cycle fatigue cracking of multicore axis
Equipment (CN201510633267.9) is proposed for internal combustion engine Split link axially pushes mandrel to even using edge cam
Bar big end reverse cyclic loadings, the new process for separating connecting rod tip and gonnecting rod body using low-cycle fatigue stress and stress concentration effect.
And the low-cycle fatigue cracking apparatus that edge cam pushes multicore axis is gone out according to the technological design.The patented technology solves primary add
Carry swollen disconnected, swollen disconnected power is big, the more demanding problem of master cylinder pressure, while using motor driven, avoids due to using hydraulic standard
Static loading, hydraulic circuit caliber, valve latus rectum, pump discharge, hydraulic cylinder parameter setting are complicated and because of connecting rod caused by loading velocity
The problem of swollen seam broken having no progeny, while the equipment can improve Machining of Connecting Rod efficiency, and expand with simultaneous processing multiple groups connecting rod
The range that the cracking processing of connecting rod material is chosen.But the technology still remains following deficiency: loading method is still radial
Load, the too fast mode that can make fatigue loading of loading velocity become the cracking of semi-static load, keep con-rod fracture splitting too fast, section matter
It is poor to measure；During to connecting rod load, what connecting rod was subject to is asymmetric force.
Summary of the invention
The shortcomings that in order to overcome above-mentioned technology, the object of the present invention is to provide a kind of radial directions of Split link cracking
Cam load and 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 adopted by the invention is as follows:
Radial cams load and low-cycle fatigue cracking apparatus, including pedestal 9, the pedestal 9 left and right two of Split link cracking
Side is fixed with four columns 8, and crossbeam 22 is fixed on the upside of four columns 8, servo motor 1 has been left and right symmetrically arranged on crossbeam 22,
First lifting wheel 2 is housed, the first lifting wheel 2 is mentioned by pierce tap 3 with second on upper box 21 on the output shaft of servo motor 1
29 connection of wheel is risen, 21 left and right ends of upper box are matched by guide groove 20 with four columns 8；
21 middle part of upper box is connected with 4 upper end of splined shaft, and 4 lower end of splined shaft is connected with the output end of clutch 17, clutch
The input terminal of device 17 is connected with 10 upper output terminal of Flywheel disc, and the lower output side of Flywheel disc 10 passes through shaft coupling 13, retarder
11 connect with the output end of variable-frequency motor 12, and the control terminal of variable-frequency motor 12 is connect with the signal output end of control cabinet 15；
Connecting rod placement platform 18 is passed through in the middle part of splined shaft 4, arranges multiple groups fixture 6 on the upside of connecting rod placement platform 18, in fixture 6
Connecting rod 25 is placed, 25 big end hole of connecting rod prefabricated V-arrangement crackle slot 33 is embedded in plug 19 in 25 big end hole of connecting rod；4 upper end of splined shaft is logical
It crosses bearing 28 to be flexibly connected with upper end cam disc 5,18 downside of connecting rod placement platform is arranged symmetrically lower end cam disc 7, and lower end is convex
Wheel disc 7 is connect with splined shaft 4；Upper end cam disc 5 and corresponding lower end cam disc 7 hit the upper and lower ends of plug 19 simultaneously.
Upper end workbench 24 is connected on the upside of the connecting rod placement platform 18, arrangement multiple groups are sliding on the upside of upper end workbench 24
Rail 31 is equipped with sliding block 32 on sliding rail 31, and 32 upper end of sliding block is fixed with ram 30；
18 downside of connecting rod placement platform and upper end workbench 24 are arranged symmetrically multiple groups sliding rail 31, and sliding block is housed on sliding rail 31
32,32 upper end of sliding block is fixed with ram 30；
Upper end cam disc 5 and corresponding lower end cam disc 7 hit 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 into 25 big end hole of connecting rod
Cyclic loading will be passed to connecting rod tip 34 by cleavage moveable sheath 23 by middle insertion plug 19, plug 19.
The variable-frequency motor 12 is able to use hydraulic motor replacement.
The cracking technology of the radial cams load and low-cycle fatigue cracking apparatus of the Split link cracking, including with
Lower step:
Variable-frequency motor 12 drives upper end cam disc 5 and corresponding lower end cam disc 7 to hit plug 19 simultaneously by splined shaft 4
Upper and lower ends, it is different according to upper end cam 5,7 design curve of lower end cam to 19 reverse cyclic loadings of plug, 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 slot 33 of 25 big end hole of connecting rod transmitted for load
The cyclic loading come generates stress concentration at precrack, after multiple rotary forges, completes connecting rod tip 34 and gonnecting rod body
35 low stress separation.
The invention has the benefit that
(1) the cracking load for needing to apply effectively has dropped in the present invention.Radial loaded simultaneously, avoids a loading velocity mistake
Fast problem.
(2) plane of disruption is not plastically deformed significantly after cracking, and cross section quality is good.
(3) more connecting rods forge simultaneously, improve lysis efficiency.
(4) it is driven, is avoided due to using hydraulic semi-static load, hydraulic circuit caliber, valve are logical using variable-frequency motor 12
The problem of diameter, pump discharge, hydraulic cylinder parameter setting be complicated and swollen because of connecting rod caused by the loading velocity seam broken having no progeny.
(5) it is arranged symmetrically by control upper end cam disc 5 and 7 curve of lower end cam disc and connecting rod 25 and solves connecting rod 25 and exist
The asymmetric problem of stress during forging.
(6) range of choice for expanding con-rod fracture splitting material, 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, have 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.
Detailed description of the invention
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 schematic diagram of the connecting rod 25 of the invention containing prefabricated splitter 33.
Specific embodiment
The present invention is described in further detail with attached drawing with reference to embodiments.
Referring to Fig.1, the radial cams load of Split link cracking and low-cycle fatigue cracking apparatus, including pedestal 9, pedestal
9 arranged on left and right sides are fixed with four columns 8, and crossbeam 22 is fixed on the upside of four columns 8, has been left and right symmetrically arranged and has watched on crossbeam 22
Motor 1 is taken, the first lifting wheel 2 is housed on the output shaft of servo motor 1, the first lifting wheel 2 passes through on pierce tap 3 and upper box 21
The connection of the second lifting wheel 29,21 left and right ends of upper box are matched with four columns 8 by guide groove 20, servo motor 1, first
Lifting wheel 2, pierce tap 3 and the second lifting wheel 29 constitute cam disc elevating mechanism；
21 middle part of upper box is connected with 4 upper end of splined shaft, and 4 lower end of splined shaft is connected with the output end of clutch 17, clutch
The input terminal of device 17 is connected with 10 upper output terminal of Flywheel disc, and the lower output side of Flywheel disc 10 passes through the first coupking shaft 16 and connection
The connection of 13 upper output terminal of axis device, 13 lower input of shaft coupling are connected by the second coupking shaft 14 with 11 upper output terminal of retarder
It connects, the lower input of retarder 11 is connect with the output end of variable-frequency motor 12, the control terminal and control cabinet 15 of variable-frequency motor 12
Signal output end connection, control cabinet 15 is mounted on 9 side of pedestal, clutch 17, Flywheel disc 10, the first coupking shaft 16, second
Coupking shaft 14, shaft coupling 13, retarder 11 and variable-frequency motor 12 constitute decelerating through motor power mechanism, and variable-frequency motor 12 is able to use
Hydraulic motor replaces.
Referring to Fig. 2, Fig. 3 and Fig. 4, connecting rod placement platform 18 is passed through in the middle part of splined shaft 4, is arranged on the upside of connecting rod placement platform 18
Multiple groups fixture 6, places connecting rod 25 in fixture 6, the prefabricated V-arrangement crackle slot 33 of 25 big end hole of connecting rod, is inserted into and splits in 25 big end hole of connecting rod
Solution is dynamic to cover 23 and cleavage stable sheath 26, is embedded in plug 19 in cleavage moveable sheath 23 and cleavage stable sheath 26；It is solid on the upside of connecting rod placement platform 18
It is connected to upper end workbench 24, multiple groups sliding rail 31 is arranged on the upside of upper end workbench 24, sliding block 32,32 upper end of sliding block are housed on sliding rail 31
It is fixed with ram 30；18 downside of connecting rod placement platform and upper end workbench 24 are arranged symmetrically multiple groups sliding rail 31, on sliding rail 31
Equipped with sliding block 32,32 upper end of sliding block is fixed with ram 30；
4 upper end of splined shaft 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 the pick-and-place of connecting rod 25,18 downside of connecting rod placement platform is arranged symmetrically lower end cam disc 7, lower end cam disc 7 and spline
Axis 4 connects；Upper end cam disc 5 and corresponding lower end cam disc 7 hit 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 cracking technology of the radial cams load and low-cycle fatigue cracking apparatus of the Split link cracking, 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 hit the upper and lower ends of plug 19, to 19 reverse cyclic loadings of plug, not according to upper end cam disc 5,7 design curve of lower end cam disc
Together, plug 19 is loaded for several times weekly, cyclic loading is passed to connecting rod tip 34, connecting rod 25 by cleavage moveable sheath 23 by plug 19
The prefabricated V-arrangement crackle slot 33 of big end hole, the cyclic loading passed over by cleavage moveable sheath 23 generate stress in precrack and concentrate,
After multiple rotary forges, the low stress separation of connecting rod tip 34 and gonnecting rod body 35 is completed.
The operation principle of the present invention is that:
Present invention utilizes stress concentration effects and fatigue fracture principle, are driven simultaneously by decelerating through motor power mechanism
End cam disk 5 and lower end cam disc 7 are rotated by certain revolving speed, one action circulation includes rise, closely stop, rise, far stop,
Backhaul totally 5 stages, while the upper and lower side of plug 19 is hit by ram 30, plug 19 radially does micro-displacement, squeezes
Cleavage moveable sheath 23 completes connecting rod tip 34 and gonnecting rod body 35 to the big end hole reverse cyclic loadings of the connecting rod 25 with prefabricated splitter 33
Low stress fatigue separation, 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 keep plug 19 loaded symmetrically and evenly, it is disconnected after improving cracking
Face quality.Splined shaft 4 can be detached from by clutch 17 and decelerating through motor power mechanism, ensure that the frequency conversion when picking and placing connecting rod 25
Motor 12 can not stall, and continue to accelerate Flywheel disc 10, carry out energy storage.Flywheel disc 10 reduces speed wave when equipment operation
It is dynamic.Upper box 21 can pass through cam disc elevating mechanism hoisting depth.
Claims (5)
1. radial cams load and the low-cycle fatigue cracking apparatus, including pedestal (9) of Split link cracking, it is characterised in that:
Pedestal (9) arranged on left and right sides is fixed with four columns (8), is fixed with crossbeam (22) on the upside of four columns (8), left on crossbeam (22)
The right side is symmetrically installed with servo motor (1), the first lifting wheel (2) is housed on the output shaft of servo motor (1), the first lifting wheel (2)
It is connect by pierce tap (3) with the second lifting wheel (29) on upper box (21), upper box (21) left and right ends pass through guide groove
(20) it is matched with four columns (8)；
It being connected in the middle part of upper box (21) with splined shaft (4) upper end, splined shaft (4) lower end is connected with the output end of clutch (17),
The input terminal of clutch (17) is connected with Flywheel disc (10) upper output terminal, and the lower output side of Flywheel disc (10) passes through shaft coupling
(13), retarder (11) is connect with the output end of variable-frequency motor (12), control terminal and control cabinet (15) of variable-frequency motor (12)
Signal output end connection；
Connecting rod placement platform (18) are passed through in the middle part of splined shaft (4), arrange multiple groups fixture (6) on the upside of connecting rod placement platform (18), folder
Tool (6) is middle to place connecting rod (25), the prefabricated V-arrangement crackle slot (33) of connecting rod (25) big end hole, is embedded in plug in connecting rod (25) big end hole
(19)；Splined shaft (4) upper end is flexibly connected by bearing (28) with upper end cam disc (5), connecting rod placement platform (18) downside
It is arranged symmetrically lower end cam disc (7), lower end cam disc (7) is connect with splined shaft (4)；Upper end cam disc (5) and corresponding lower end
Cam disc (7) hits the upper and lower ends of plug (19) simultaneously.
2. radial cams load and the low-cycle fatigue cracking apparatus of Split link cracking according to claim 1, special
Sign is: being connected with upper end workbench (24) on the upside of the connecting rod placement platform (18), arrangement on the upside of upper end workbench (24)
Multiple groups sliding rail (31) is equipped with sliding block (32) on sliding rail (31), is fixed with ram (30) on sliding block (32)；
Connecting rod placement platform (18) downside and upper end workbench (24) are arranged symmetrically multiple groups sliding rail (31), and sliding rail is equipped on (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) hit up and down the two of plug (19) by ram (30) simultaneously
End.
3. radial cams load and the low-cycle fatigue cracking apparatus of Split link cracking according to claim 1, special
Sign is: being inserted into cleavage moveable sheath (23) and cleavage stable sheath (26) in described connecting rod (25) big end hole, cleavage moveable sheath (23) and splits
Xie Ding, which covers in (26), is embedded in plug (19), and cyclic loading will be passed to connecting rod tip by cleavage moveable sheath (23) by plug (19)
(34)。
4. radial cams load and the low-cycle fatigue cracking apparatus of Split link cracking according to claim 1, special
Sign is: the variable-frequency motor (12) is able to use hydraulic motor replacement.
5. the cracking of the radial cams load and low-cycle fatigue cracking apparatus of Split link cracking according to claim 1
Technique, which comprises the following steps:
Variable-frequency motor (12) drives upper end cam disc (5) and corresponding lower end cam disc (7) to hit core simultaneously by splined shaft (4)
The upper and lower ends of stick (19), to plug (19) reverse cyclic loadings, not according to upper end cam disc (5), lower end cam disc (7) design curve
Together, plug (19) are loaded for several times weekly, plug (19) passes to cyclic loading connecting rod tip (34), and connecting rod tip (34) is pre-
V-arrangement crackle slot (33) processed, the cyclic loading passed over generates stress concentration at precrack, after multiple rotary forges,
Connecting rod tip (34) are completed to separate with the low stress of gonnecting rod body (35).
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| 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 |
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| 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 |
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| Publication Number | Publication Date |
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| CN106826149A CN106826149A (en) | 2017-06-13 |
| CN106826149B true CN106826149B (en) | 2019-01-08 |
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Families Citing this family (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 |
| CN111842612B (en) * | 2019-10-11 | 2022-02-01 | 重庆智能机器人研究院 | Automatic cracking equipment for crank connecting rod |
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| CN1569373A (en) * | 2004-04-26 | 2005-01-26 | 吉林大学 | Processing apparatus for initial cracking tank for engine connecting rod |
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| 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
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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 |
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| 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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