CN104668926B - Split-type detonation fracture splitting machining technology of laser initiation of connecting rod tip - Google Patents
Split-type detonation fracture splitting machining technology of laser initiation of connecting rod tip Download PDFInfo
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- CN104668926B CN104668926B CN201510025620.5A CN201510025620A CN104668926B CN 104668926 B CN104668926 B CN 104668926B CN 201510025620 A CN201510025620 A CN 201510025620A CN 104668926 B CN104668926 B CN 104668926B
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- connecting rod
- detonation
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- fracture
- fracture splitting
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Disclosed is a split-type detonation fracture splitting machining technology of laser initiation of a connecting rod tip. The technology includes: before fracture splitting, machining two fracture splitting grooves in the inner side of the big end hole of each connecting rod through a broach or laser; loading more than two connecting rods into a bottom plate box in an overlapping manner, placing a detonation subject and an expanding medium in the big end hole of the connecting rods and pressing through a pressing cover plate; trigging a high-pressure ball gap switch through the laser to be switched on during fracture splitting, 30-100KA pulsed heavy current is exerted to a copper wire penetrating the detonation subject which is detonated to generate transient high-energy high-pressure shock waves to exert dynamic load to the inner wall of the big end hole of the connecting rods, and fracture tips of the fracture splitting grooves are enabled to loss stability to be expanded to form entire fracture shearing surfaces. By the arrangement, fracture splitting for more than two connecting rods can be realized at one step, fracture splitting efficiency is high, the combined fracture surfaces are interlocked and high in resistance to shear bearing capacity, machining equipment is effectively saved, and machining cost is lowered.
Description
Technical field
The invention belongs to con-rod fracture splitting processing technique field is and in particular to a kind of laser initiation at the big end of Split link
Detonation cranking processing technology.
Background technology
Traditional connecting rod manufacturing process mainly has split type and two kinds of monoblock type, in two kinds of technique, all needs to gonnecting rod body
Multiple tracks machining processes, the high processing costs such as carry out drawing, grind with the faying face of connecting rod cap, positioning precision is low, simultaneously connecting rod cap
Dowel hole requires higher machining accuracy.
Con-rod fracture splitting technique is a kind of new technology of Machining of Connecting Rod, using Theory of Fracture Mechanics, first in crank pin end pore
The prefabricated splitter in inner side, forms initial crack, then passes through to crack process equipment to big end hole medial surface applying radial force, makes to split
Stricture of vagina is outwards constantly extended by endoporus, until cracking completely, finally will be at a fully engaged at the plane of disruption to gonnecting rod body and end cap, and penetrate spiral shell
Bolt is simultaneously screwed to and requires moment of torsion.Due to being overall processing, greatly reduce manufacturing procedure, be suitable for the material of con-rod fracture splitting technique simultaneously
Material mostly is the fragile material such as the non-modulation carbon steel of microalloy, powder metallurgy, spheroidal graphite cast-iron, and after brittle failure, fracture faying face is indenting,
Meshing quality is good, and anti-shearing bearing capacity is higher, eliminates the hinge of bolt hole or the polish of boring, reduces processing cost.
At present con-rod fracture splitting patent mainly has following a few class, include heat treatment or freeze brittle failure (U.S.Pat.No.4,768,
694), apply static or impulse load (U.S.Pat.No.4,860,419), and using expanding arbor and wedge cracking dress
Put (U.S.Pat.No.5,503,317) etc..Existing cleavage method often requires higher, only to equipment and processing conditionss simultaneously
Single connecting rod can be processed, lead to that high processing costs, lysis efficiency are low, complex operation the problems such as.
Content of the invention
In order to overcome the shortcoming of above-mentioned prior art, it is an object of the invention to provide a kind of big end of Split link is sharp
The detonation cranking processing technology that light detonates, has lysis efficiency height, and fracture faying face is indenting, anti-shearing bearing capacity is strong
Advantage.
In order to achieve the above object, the technical scheme that the present invention takes is：
A kind of detonation cranking processing technology of the laser initiation at the big end of Split link, comprises the following steps：
Step one, inside the big end hole of connecting rod 8 by broaching tool or Laser Processing twice splitter 19, splitter 19 be in wedge angle
Deep trouth shape, deep 0.4-0.6mm, 0-90 ° of subtended angle, wedge angle radius of curvature 0.1-0.3mm；
Step 2, by plural connecting rod 8 be laminated loading floor box 2 in, lay detonation master in the big stomidium of connecting rod 8
Body 4 and inflating medium 7, are compressed by press-fiting cover plate 1, and are fastened by bolt 11 and nut 12；
Step 3, by laser instrument 14 trigger high pressure sphere gap switch 18 close a floodgate, the copper wire 13 running through detonation main body 4 is applied
The pulse high current of 30～100KA, ignites the high energy high-pressure shocking wave that detonation main body 4 produces transient state, in the big stomidium of connecting rod 8
Wall applies dynamic load, promotes the crack tip unstable propagation of splitter 19 to form whole fault shearing face.
The device that described technique adopts includes floor box 2 and press-fits cover plate 1, floor box 2 and press-fit stacking pressure between cover plate 1
Equipped with plural connecting rod 8, the little stomidium of connecting rod 8 is positioned by alignment pin 10, and big stomidium is installed on positioning boss 3, connecting rod 8
Big stomidium in filling detonation main body 4 and inflating medium 7, by press-fiting cover plate 1 gland connecting rod 8 and inflating medium 7, and pass through spiral shell
Bolt 11 and nut 12 are fastened, and copper wire 13 runs through floor box 2, detonation main body 4 and press-fits cover plate 1, and accesses laser initiation system
In the circuit of system.
Described detonation main body 4 includes shell 5 and powder column 6, and powder column 6 adopts industrial bulking ammonium nitrate explosive, degree of packing
In 0.90-1.30g/cm3, the steady detonation diameter with diameter greater than 14mm for the powder column 6.
Described inflating medium 7 is incompressible soft implant, including polyurethane, nylon.
Described Laser initiation system includes laser instrument 14 and electrion loop, and laser instrument 14 produces laser pulse 17,
Line focus lens 15 inject high pressure sphere gap switch 18 by the window 16 being connected to high pressure sphere gap switch 18 after focusing on.
Described electrion loop includes high pressure sphere gap switch 18, and high pressure sphere gap switch 18 connects one end of copper wire 13,
The other end of copper wire 13 connects storage capacitor C one end, high voltage power supply E one end, the high voltage power supply E other end and current-limiting resistance R one end
Connect, connect with high pressure sphere gap switch 18 after the current-limiting resistance R other end and the connection of the storage capacitor C other end, high voltage power supply E is 20
～90KV, storage capacitor C are 12 μ f, and the resistance of current-limiting resistance R is 5～20 Ω.
Described laser instrument 14 adopts Nd:YAG solid state laser.
Described copper wire 13 diameter 0.2mm, length is folded drop height degree by connecting rod 8 and is determined.
Advantages of the present invention is that the high energy high pressure producing adds to the crank bore inwall of prefabricated splitter by exploding
Carry, can disposably realize while two or more connecting rod cracking, lysis efficiency is high, fracture faying face is indenting, anti-shearing hold
Loading capability is strong, effectively saves process equipment simultaneously, reduces processing cost.
Brief description
The schematic diagram of the connecting rod 8 of the prefabricated splitter of Fig. 1 present invention 19.
Fig. 2 is the detonation cracker schematic diagram of laser initiation of the present invention.
Fig. 3 is the assembling structure sectional view of detonation cracker of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
A kind of detonation cranking processing technology of the laser initiation at the big end of Split link, comprises the following steps：
Step one, reference Fig. 1, by broaching tool or Laser Processing twice splitter 19, splitter inside the big end hole of connecting rod 8
19 is in wedge angle deep trouth shape, deep 0.4-0.6mm, 0-90 ° of subtended angle, wedge angle radius of curvature 0.1-0.3mm；
Step 2, reference Fig. 2 and Fig. 3, plural connecting rod 8 are laminated in loading floor box 2, at the big end of connecting rod 8
In the hole lays detonation main body 4 and inflating medium 7, is compressed by press-fiting cover plate 1, and is fastened by bolt 11 and nut 12；
Step 3, by laser instrument 14 trigger high pressure sphere gap switch 18 close a floodgate, the copper wire 13 running through detonation main body 4 is applied
The pulse high current of 30～100KA, ignites the high energy high-pressure shocking wave that detonation main body 4 produces transient state, in the big stomidium of connecting rod 8
Wall applies dynamic load, promotes the crack tip unstable propagation of splitter 19 to form whole fault shearing face.
With reference to Fig. 2 and Fig. 3, the device that described technique adopts includes floor box 2 and press-fits cover plate 1, floor box 2 and press-fit lid
Between plate 1, stacking is pressed with plural connecting rod 8, and the little stomidium of connecting rod 8 is positioned by alignment pin 10, and big stomidium is installed on positioning
On boss 3, filling detonation main body 4 and inflating medium 7 in the big stomidium of connecting rod 8, by press-fiting cover plate 1 gland connecting rod 8 and expanding
Medium 7, and fastened by bolt 11 and nut 12, copper wire 13 runs through floor box 2, detonation main body 4 and press-fits cover plate 1, and
Access in the circuit of Laser initiation system.
Described detonation main body 4 includes shell 5 and powder column 6, and powder column 6 adopts hypoallergenic, avirulent industrial expanded ammonium nitrate
Explosive, degree of packing is in 0.90-1.30g/cm3, the steady detonation diameter with diameter greater than 14mm for the powder column 6.
Described inflating medium 7 is incompressible soft implant, including polyurethane, nylon.
Described Laser initiation system includes laser instrument 14 and electrion loop, and laser instrument 14 produces laser pulse 17,
Line focus lens 15 inject high pressure sphere gap switch 18 by window 16 after focusing on, the insulating gas ionization shape in trigger sphere gap switch 18
Become discharge channel, so that electrion circuit closed, copper wire 13 produces the pulse high current of 30～100KA.
Described electrion loop includes high pressure sphere gap switch 18, and high pressure sphere gap switch 18 connects one end of copper wire 13,
The other end of copper wire 13 connects storage capacitor C one end, high voltage power supply E one end, the high voltage power supply E other end and current-limiting resistance R one end
Connect, connect with high pressure sphere gap switch 18 after the current-limiting resistance R other end and the connection of the storage capacitor C other end, high voltage power supply E is 20
～90KV, storage capacitor C are 12 μ f, and the resistance of current-limiting resistance R is 5～20 Ω.
Described laser instrument 14 adopts Nd:YAG solid state laser.
Described copper wire 13 diameter 0.2mm, length is folded drop height degree by connecting rod and is determined.
Above content is to further describe it is impossible to assert with reference to specific preferred implementation is made for the present invention
Being embodied as of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of present inventive concept, some simple deduction or replace can also be made, all should be considered as belonging to the present invention's
Protection domain.
Claims (8)
1. a kind of detonation cranking processing technology of the laser initiation at the big end of Split link is it is characterised in that comprise the following steps：
Step one, inside the big end hole of connecting rod (8) by broaching tool or Laser Processing twice splitter (19), splitter (19) be in point
Pull channel-shaped, deep 0.4-0.6mm, 0-90 ° of subtended angle, wedge angle radius of curvature 0.1-0.3mm；
Step 2, plural connecting rod (8) is laminated loads in floor box (2), in the big stomidium of connecting rod (8), lay detonation
Main body (4) and inflating medium (7), are compressed by press-fiting cover plate (1), and by bolt (11) and nut (12) fastening；
Step 3, by laser instrument (14) trigger high pressure sphere gap switch (18) close a floodgate, to the copper wire (13) running through detonation main body (4)
Apply the pulse high current of 30～100KA, ignite the high energy high-pressure shocking wave that detonation main body (4) produces transient state, to connecting rod (8)
Big stomidium inwall applies dynamic load, promotes the crack tip unstable propagation of splitter (19) to form whole fault shearing face.
2. according to claim 1 technique adopt device, including floor box (2) and press-fit cover plate (1) it is characterised in that：
Floor box (2) and press-fit between cover plate (1) stacking and be pressed with plural connecting rod (8), the little stomidium of connecting rod (8) is by alignment pin
(10) position, big stomidium is installed on positioning boss (3), filling detonation main body (4) and inflating medium in the big stomidium of connecting rod (8)
(7), by press-fiting cover plate (1) gland connecting rod (8) and inflating medium (7), and fastened by bolt (11) and nut (12),
Copper wire (13) runs through floor box (2), detonation main body (4) and press-fits cover plate (1), and accesses in the circuit of Laser initiation system.
3. according to claim 2 technique adopt device it is characterised in that：Described detonation main body (4) includes shell (5)
And powder column (6), using industrial bulking ammonium nitrate explosive, degree of packing is in 0.90-1.30g/cm for powder column (6)3, powder column (6) diameter
Steady detonation diameter more than 14mm.
4. according to claim 2 technique adopt device it is characterised in that：Described inflating medium (7) is incompressible
Soft implant, including polyurethane or nylon.
5. according to claim 2 technique adopt device it is characterised in that：Described Laser initiation system includes laser instrument
(14) and electrion loop, laser instrument (14) produces laser pulse (17), line focus lens (15) focus on after by being connected to height
High pressure sphere gap switch (18) injected by the window (16) of pressure sphere gap switch (18).
6. according to claim 5 technique adopt device it is characterised in that：Described electrion loop includes smash
Gap switchs (18), and high pressure sphere gap switch (18) connects one end of copper wire (13), and the other end of copper wire (13) connects storage capacitor C mono-
End, high voltage power supply E one end, the high voltage power supply E other end and the connection of current-limiting resistance R one end, the current-limiting resistance R other end and storage capacitor
Connect with high pressure sphere gap switch (18) after the C other end connects, high voltage power supply E is 20～90KV, storage capacitor C is 12 μ f, current limliting
The resistance of resistance R is 5～20 Ω.
7. according to claim 5 technique adopt device it is characterised in that：Described laser instrument (14) adopts Nd:YAG is solid
Body laser.
8. according to claim 2 technique adopt device it is characterised in that：Described copper wire (13) diameter 0.2mm, length
Fold drop height degree by connecting rod to determine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510025620.5A CN104668926B (en) | 2015-01-19 | 2015-01-19 | Split-type detonation fracture splitting machining technology of laser initiation of connecting rod tip |
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| CN201510025620.5A CN104668926B (en) | 2015-01-19 | 2015-01-19 | Split-type detonation fracture splitting machining technology of laser initiation of connecting rod tip |
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| CN104668926B true CN104668926B (en) | 2017-02-22 |
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| CN108058003B (en) * | 2017-12-13 | 2019-06-25 | 吉林大学 | A kind of swollen disconnected equipment of reducer shell bearing block and its swollen disconnected method |
| CN109632428A (en) * | 2019-01-29 | 2019-04-16 | 青海大学 | A kind of metal material cracking performance evaluation method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4860419A (en) * | 1987-08-17 | 1989-08-29 | General Motors Corporation | Split bearing assemblies, method for making |
| US5131577A (en) * | 1988-05-17 | 1992-07-21 | Ford Motor Company | Apparatus for making a powder metal connecting rod |
| US5503317A (en) * | 1994-03-31 | 1996-04-02 | Tri-Way Machine Ltd. | Apparatus for fracturing connecting rods preforms |
| CN2511428Y (en) * | 2001-11-30 | 2002-09-18 | 吉林大学 | Apparatus for machining engine link |
| CN101307796A (en) * | 2007-12-21 | 2008-11-19 | 长春设备工艺研究所 | High intensity alloyed steel linkage rod deep cooling embrittlement bulge-breaking process |
| CN102486199A (en) * | 2010-12-31 | 2012-06-06 | 上汽通用五菱汽车股份有限公司 | Machining process of engine connecting rod |
| CN102182750B (en) * | 2011-04-25 | 2013-07-03 | 潍坊浩泰机械有限责任公司 | Split self-positioning connecting rod and processing method thereof |
| CN102626777B (en) * | 2012-04-17 | 2014-10-29 | 江苏大学 | Manufacturing method of composite double-metal cracking connecting rod |
| CN103939454B (en) * | 2013-01-21 | 2016-06-29 | 重庆长安汽车股份有限公司 | A kind of engine cracking connection rod and processing method thereof |
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