CN202732659U - Laser scratching and hydraulic cracking connecting rod - Google Patents
Laser scratching and hydraulic cracking connecting rod Download PDFInfo
- Publication number
- CN202732659U CN202732659U CN 201220401285 CN201220401285U CN202732659U CN 202732659 U CN202732659 U CN 202732659U CN 201220401285 CN201220401285 CN 201220401285 CN 201220401285 U CN201220401285 U CN 201220401285U CN 202732659 U CN202732659 U CN 202732659U
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- CN
- China
- Prior art keywords
- connecting rod
- cover
- rod
- cracking
- joint surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model provides a laser scratching and hydraulic cracking connecting rod which is applied to engine assembly. A connecting rod body and a connecting rod cover are arranged on two ends of a crank shaft hole. The rod end face of the connecting rod body is a rod cracking joint surface. Rod connection bolt holes are respectively arranged on two ends of the crank shaft hole of the connecting rod body. The end face of the connecting rod cover is a cover cracking joint surface. Cover connection bolts holes are respectively arranged on two ends of the crank shaft hole of the connecting rod cover. The rod cracking joint surface and the cover cracking joint surface are two particle joint surfaces which are completely meshed with each other and are processed through adoption of the laser scratching and hydraulic cracking method. Through adoption of the laser scratching and hydraulic cracking method, the rod joint surface and the cover joint surface carry out brittle fracture without any plastic deformation so that a rod parting surface can be completely meshed with a cover parting surface, assembling ability achieves the best and meshing quality between the rod parting surface and the cover parting surface is improved. Moreover, the laser scratching and hydraulic cracking connecting rod has better fatigue strength and longer service life, reduces connecting rod bolt breakage and other faults in the operating process of an engine, enables processing cost of a single connecting rod to be reduced by 8%, reduces equipment investment and processing cost, and obviously improves production efficiency.
Description
Technical field
The utility model relates to the Manufacturing Technology for Automotive Parts field, specifically a kind of laser scratch, hydraulic expanding cracking connecting rod.
Background technique
Motor is the heart of automobile, and connecting rod is bearing very high periodic shock power, inertial force and bending force in the course of the work as the important spare part of motor.The workmanship of connecting rod directly has influence on the Performance And Reliability of motor, and this just requires connecting rod should have very high intensity, toughness and fatigue performance and weight precision.Along with the development of auto manufacturing technology, motor is tending towards lightweight, simplifies the structure, and very large variation has also occured thereupon for connecting rod manufacturing technology and technique.
At present, in traditional Machining of Connecting Rod technique, be first crank pin end pore to be carried out roughing, then adopt sawed-off or mill mode disconnected, that break and separate connecting rod shank and connecting rod cap, and then the junction plane of connecting rod shank and connecting rod cap carried out grinding, final fine finishing big end hole again.Although can satisfy function requirement, have following drawback.
1, connecting rod shank and connecting rod cap are generally grinding, broaching in conjunction with processing, and be very consuming time, and will re-assembly linkage component with bolt, and then crank pin end pore is carried out fine finishing.Traditional connnecting rod big end processing technology is very complicated, Production Line Configured head, and floor space is large, and then whole manufacturing expense is high.
2, adopt sawed-off or mill mode disconnected, that break and separate connecting rod shank and connecting rod cap, always have residual stress to stay in total member of connecting rod after connecting rod shank and the connecting rod cap assembling.Deliver on the engine line when assembling with bent axle when connecting rod, take connecting rod shank and connecting rod cap apart.At this moment, residual stress may cause the big end hole distortion.
3, connecting rod shank and the connecting rod cap of usual manner separation, junction plane of poor quality, connecting rod when high speed operation complete by bolt carry the firing chamber outburst impact force, cause easily connecting-rod bolts fatigue failure fracture after the long-term work of motor, cause motor to scrap in the time of seriously.
Summary of the invention
For overcoming the deficiencies in the prior art, goal of the invention of the present utility model is to provide a kind of laser scratch, hydraulic expanding cracking connecting rod, to realize improving connecting rod reliability and motor overall performance, reduces the purpose of connecting rod cost.
For achieving the above object, the crankshaft hole two ends of connecting rod of the present utility model are respectively connecting rod shank and connecting rod cap, and the rod end surface of connecting rod shank is the bar disconnected junction plane that rises, and there is bar connecting bolt hole at the crankshaft hole two ends of connecting rod shank; The end face of connecting rod cap is for covering the disconnected junction plane that rises, and the connecting bolt hole is covered at the crankshaft hole two ends of connecting rod cap, and bar rises and breaks junction plane and cover the disconnected junction plane that rises is the particle junction plane that employing laser scratch, hydraulic expanding break and process and can mesh fully.
The utility model compared with prior art has following advantage.
1, brand-new connection-rod, lid fracture mode.Utilize Laser Equipment to realize the cutting of connecting rod shank and lid, existing connection-rod, lid separated and the hole processing operation is reduced to existing two procedures by before six procedures, make the processing cost of single-piece connecting rod reduce by 8%, equipment investment and the processing cost of connecting rod have been reduced, improved the finished product output of unit time, manufacturing efficiency significantly improves.
2, joint surface of connection rod meshes fully.After connecting rod adopts the hydraulic expanding breaking process, bar, lid faying surface are the brittle fractures of not being with any plastic deformation, without any residue and burr, the parting surface of bar, lid is the particle junction plane, can mesh fully, saved follow-up when assembling owing to take that connecting rod ASSY that shaft and lid cause is out of shape apart and the situation such as big end hole circularity amplification, its assembling capacity has been reached cause the best.
3, laser scratch technique is that to utilize laser beam cutting to rise after bolt hole processing disconnected, improved the meshing quality of connecting rod cap and connecting rod parting surface, help Surface of action can help bolt to share the instantaneous burst power of firing chamber in engine operation, make connecting rod have better fatigue strength and working life, reduced the fault such as connecting-rod bolts fracture in the engine operation process.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the connecting rod shank of Fig. 1.
Fig. 3 is the structural representation of the connecting rod cap of Fig. 1.
Embodiment
Such as Fig. 1, Fig. 2, shown in Figure 3, crankshaft hole 2 two ends of connecting rod 1 are respectively connecting rod shank 3 and connecting rod cap 4; The rod end surface of connecting rod shank 3 is the bar disconnected junction plane 5 that rises, and at crankshaft hole 2 two ends of connecting rod shank 3 bar connecting bolt hole 6 is arranged; The end face of connecting rod cap 4 is and covers the disconnected junction plane 7 that rises, and covers connecting bolt hole 8 at crankshaft hole 2 two ends of connecting rod cap 4.Connecting rod shank 3 of the present utility model and connecting rod cap 4 adopt laser cutting, extraction and application hydraulic coupling spreading: adopt first the mode of laser scratch to process the concentrated groove of two stress, wedge shaped pressure head is entered in the crankshaft hole 2, mode by hydraulic pressure makes crankshaft hole 2 produce radial force, make it the crack occur at the laser scratch place, and connecting rod shank 3 is separated with connecting rod cap 4, the parting surface of connecting rod shank 3 and connecting rod cap 4 is the particle junction plane, can mesh fully.
During assembling: at first cooperate the location by lid on disconnected junction plane 5 and the connecting rod cap 4 disconnected junction plane 7 that rises that rises of the bar on the connecting rod shank 3; After the location, the use high-strength bolt passes connecting rod cap bolt hole 8 and connection-rod bolt hole 6 is tightened in advance, then uses tightening machine to tighten, and finally realizes the harmless engagement of connecting rod shank 3 and connecting rod cap.
Claims (1)
1. a laser scratch, hydraulic expanding cracking connecting rod, it is characterized in that: crankshaft hole (2) two ends of connecting rod (1) are respectively connecting rod shank (3) and connecting rod cap (4), the rod end surface of connecting rod shank (3) is the bar disconnected junction plane (5) that rises, and there is bar connecting bolt hole (6) at crankshaft hole (2) two ends of connecting rod shank (3); The end face of connecting rod cap (4) is for covering the disconnected junction plane (7) that rises, connecting bolt hole (8) is covered at crankshaft hole (2) two ends of connecting rod cap (4), bar disconnected junction plane (5) and the lid particle junction plane of disconnected junction plane (7) for adopting laser scratch, the disconnected processing of hydraulic expanding and can meshing fully that rise that rise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220401285 CN202732659U (en) | 2012-08-14 | 2012-08-14 | Laser scratching and hydraulic cracking connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220401285 CN202732659U (en) | 2012-08-14 | 2012-08-14 | Laser scratching and hydraulic cracking connecting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202732659U true CN202732659U (en) | 2013-02-13 |
Family
ID=47658361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220401285 Expired - Fee Related CN202732659U (en) | 2012-08-14 | 2012-08-14 | Laser scratching and hydraulic cracking connecting rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202732659U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170814A (en) * | 2013-03-06 | 2013-06-26 | 西安理工大学 | Processing method of anti-blasting device sealing and combining surface |
-
2012
- 2012-08-14 CN CN 201220401285 patent/CN202732659U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170814A (en) * | 2013-03-06 | 2013-06-26 | 西安理工大学 | Processing method of anti-blasting device sealing and combining surface |
| CN103170814B (en) * | 2013-03-06 | 2015-04-22 | 西安理工大学 | Processing method of anti-blasting device sealing and combining surface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20210814 |