CN108167315A - A kind of the connecting rod blank structure and connecting rod method for processing fractured of the swollen disconnected position of controls connecting rod - Google Patents
A kind of the connecting rod blank structure and connecting rod method for processing fractured of the swollen disconnected position of controls connecting rod Download PDFInfo
- Publication number
- CN108167315A CN108167315A CN201711174718.2A CN201711174718A CN108167315A CN 108167315 A CN108167315 A CN 108167315A CN 201711174718 A CN201711174718 A CN 201711174718A CN 108167315 A CN108167315 A CN 108167315A
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- China
- Prior art keywords
- connecting rod
- swollen
- groove
- stress concentration
- slot
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The present invention provides a kind of connecting rod blank structures of the swollen disconnected position of controls connecting rod, including gonnecting rod body, the swollen disconnected position of big end of the gonnecting rod body is equipped with groove, and smooth excessive stress concentration slot is equipped among the groove, swollen failure crack is carried at the stress concentration slot.The present invention has the advantage that：By increasing groove and stress concentration groove structure design, being conducive to the formation of swollen failure crack and improving swollen cross section quality, make swollen disconnected place's stress distribution uniform, rate of reducing the number of rejects and seconds improves the bearing capacity of connecting rod and the assembling quality of gonnecting rod body and connecting rod cap.
Description
Technical field
The invention belongs to technical field of internal combustion engines, more particularly, to a kind of connecting rod blank structure of the swollen disconnected position of controls connecting rod
And Machining of Connecting Rod method.
Background technology
Connecting rod is important spare part in engine, carries the straight reciprocating motion of piston being converted to bent axle rotary motion
Effect.Present connecting rod production is realized more and more using bulge-breaking process.Its principle of bulge-breaking process is：By big in connecting rod
Design and prefabricated notch (crackle slot) at head bore center, form stress concentration, apply the load of the vertical predetermined plane of disruption in active
Draw splitting, in the case where hardly deforming, in indentation, there rule breaking, realize that the chipless of gonnecting rod body and connecting rod cap breaks
Separation is split, to improve connecting rod bearing capacity and gonnecting rod body, connecting rod cap is accurately positioned.
The practicability of fractured connecting rod is its brittle fracture surface without any plastic deformation, influences connecting rod brittle fracture
There are many factor, such as bulge-breaking process, connecting rod material performance.There are swollen disconnected stress for now not to concentrate, and swollen disconnected position is not allowed
The problems such as true, the problems such as so as to cause connecting rod yield rate is low, bearing capacity is poor.
Invention content
In view of this, the present invention is directed to propose a kind of connecting rod blank structure of the swollen disconnected position of controls connecting rod and Machining of Connecting Rod side
Method, do not concentrated with solving swollen disconnected stress existing for existing connecting rod bulge-breaking process, swollen disconnected location dislocation, the problems such as swollen section is uneven.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of connecting rod blank structure of the swollen disconnected position of controls connecting rod, including gonnecting rod body, the big end of the gonnecting rod body is swollen
Disconnected position is equipped with groove, and smooth excessive stress concentration slot is equipped among the groove, is carried at the stress concentration slot swollen disconnected
Crackle, the section of the stress concentration slot is wedge shape.
Preferably, the groove it is each in the front-back of gonnecting rod body there are two, and be symmetrically set on per two grooves of one side
The left and right sides, the groove per side are respectively arranged on the both sides up and down of the swollen section of connecting rod.
A kind of connecting rod method for processing fractured, includes the following steps：
1) groove is processed at the swollen disconnected position of the big end of connecting rod blank, is processed in the groove middle smooth
Excessive stress concentration slot；
2) it is moved down using the pressure head with wedge shape into crank pin end pore, also has a pair between crank pin end pore and pressure head
Half round buss radially applies sufficiently large load along big end hole, makes that very big stress can be generated at stress concentration slot, in stress
The position of concentration generates swollen failure crack and crackle expands rapidly, and most cracks realize brittle fracture finally, and connecting rod cap is from gonnecting rod body
On separate.
Relative to the prior art, structures and methods of the present invention are respectively provided with following advantage：
(1) by increasing groove and stress concentration groove structure design, being conducive to the formation of swollen failure crack and improving swollen section
Quality makes swollen disconnected place's stress distribution uniform, rate of reducing the number of rejects and seconds, and improves the bearing capacity of connecting rod and gonnecting rod body and connecting rod cap
Assemble quality.
Description of the drawings
The attached drawing for forming the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the front view of connecting rod blank structure described in the embodiment of the present invention；
Fig. 2 is the partial enlarged view of Fig. 1.
Respectively label represents attached drawing respectively：
1- gonnecting rod bodies, 2- grooves, 3- is swollen failure crack, 4- stress concentration slots, 5- connecting rod caps.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of connecting rod blank structure of the swollen disconnected position of controls connecting rod, as shown in Figure 1, 2, including gonnecting rod body 1, the gonnecting rod body
The 1 swollen disconnected position of big end is equipped with groove 2, and smooth excessive stress concentration slot 4, the stress are equipped among the groove 2
The section for collecting bracket groove 4 is wedge shape；The groove 2 and stress concentration slot 4 form stress concentration structure, are carried at stress concentration slot 4
Swollen failure crack 3.There are two the groove 2 is each in the front-back of gonnecting rod body 1, and two grooves 2 per one side are symmetrically set on a left side
Right both sides, the groove 2 per side are respectively arranged on the both sides up and down of the swollen section of connecting rod.
The present invention is swollen, and disconnected process is as follows：
Groove 2 and stress concentration slot 4 are just made in connecting rod blank, the pressure head then with wedge shape moves down into connecting rod
Big end hole also has a pair of half round buss between crank pin end pore and pressure head, radially apply sufficiently large load, stress along big end hole
It will will appear very big stress (notch effect) at collection bracket groove 4, generate swollen failure crack 3 in the position of stress concentration and crackle is rapid
Expand, most cracks realize brittle fracture finally, and connecting rod cap 5 is separated from gonnecting rod body 1.
The course of work of the present invention is as follows：
Stress concentration slot 4 is just made in connecting rod blank, the pressure head then with wedge shape moves down into crank pin end pore,
There is a pair of half round buss between crank pin end pore and pressure head, radially apply sufficiently large load along big end hole, between groove 2
Stress concentration slot 4 at will will appear very big stress (notch effect), swollen failure crack 3 is generated in the position of stress concentration, it is swollen
Failure crack 3 expands rapidly realization brittle fracture, and swollen break from gonnecting rod body 1 of connecting rod cap 5 is separated.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (3)
1. a kind of connecting rod blank structure of the swollen disconnected position of controls connecting rod, it is characterised in that：Including gonnecting rod body, the company of the gonnecting rod body
The big alliteration of bar breaks position equipped with groove, is equipped with smooth excessive stress concentration slot among the groove, at the stress concentration slot
With swollen failure crack, the section of the stress concentration slot is wedge shape.
2. a kind of connecting rod blank structure of the swollen disconnected position of controls connecting rod according to claim 1, it is characterised in that：It is described recessed
There are two slot is each in the front-back of gonnecting rod body, and two grooves per one side are symmetrically set on the left and right sides, the groove per side
It is respectively arranged on the both sides up and down of the swollen section of connecting rod.
3. a kind of connecting rod method for processing fractured, it is characterised in that include the following steps：
1) groove is processed at the swollen disconnected position of the big end of connecting rod blank, machining stress is concentrated in the groove middle
Slot；
2) it is moved down using the pressure head with wedge shape into crank pin end pore, also has a pair of of semicircle between crank pin end pore and pressure head
Sleeve radially applies sufficiently large load along big end hole, makes that very big stress can be generated at stress concentration slot, in stress concentration
Position generate swollen failure crack and crackle expands rapidly, most cracks realize brittle fracture finally, and connecting rod cap is from gonnecting rod body point
It separates out and.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711174718.2A CN108167315A (en) | 2017-11-22 | 2017-11-22 | A kind of the connecting rod blank structure and connecting rod method for processing fractured of the swollen disconnected position of controls connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711174718.2A CN108167315A (en) | 2017-11-22 | 2017-11-22 | A kind of the connecting rod blank structure and connecting rod method for processing fractured of the swollen disconnected position of controls connecting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108167315A true CN108167315A (en) | 2018-06-15 |
Family
ID=62527245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711174718.2A Pending CN108167315A (en) | 2017-11-22 | 2017-11-22 | A kind of the connecting rod blank structure and connecting rod method for processing fractured of the swollen disconnected position of controls connecting rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108167315A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011791A (en) * | 2010-08-24 | 2011-04-13 | 钟树平 | Connecting rod of engine and making method thereof |
| CN201908940U (en) * | 2010-11-30 | 2011-07-27 | 长城汽车股份有限公司 | Expanding fracture connecting rod of motor |
| JP2013209999A (en) * | 2012-03-30 | 2013-10-10 | Fuji Heavy Ind Ltd | Method of manufacturing connecting rod and semifinished product of connecting rod |
| FR3001013A1 (en) * | 2013-01-16 | 2014-07-18 | Peugeot Citroen Automobiles Sa | Single-piece forged rod manufacturing method for internal combustion engine of car, involves assembling rod with body to finalize boring, where difference between final diameter and diameter of outline of boring is lower than primer depth |
| CN104421322A (en) * | 2013-09-10 | 2015-03-18 | 沈阳航天誉兴机械制造有限公司 | Expansion fracture connecting rod assembly of engine piston |
| CN106903492A (en) * | 2017-04-06 | 2017-06-30 | 北京北内柴油机有限责任公司 | Engine link rises disconnected method processing technology |
-
2017
- 2017-11-22 CN CN201711174718.2A patent/CN108167315A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011791A (en) * | 2010-08-24 | 2011-04-13 | 钟树平 | Connecting rod of engine and making method thereof |
| CN201908940U (en) * | 2010-11-30 | 2011-07-27 | 长城汽车股份有限公司 | Expanding fracture connecting rod of motor |
| JP2013209999A (en) * | 2012-03-30 | 2013-10-10 | Fuji Heavy Ind Ltd | Method of manufacturing connecting rod and semifinished product of connecting rod |
| FR3001013A1 (en) * | 2013-01-16 | 2014-07-18 | Peugeot Citroen Automobiles Sa | Single-piece forged rod manufacturing method for internal combustion engine of car, involves assembling rod with body to finalize boring, where difference between final diameter and diameter of outline of boring is lower than primer depth |
| CN104421322A (en) * | 2013-09-10 | 2015-03-18 | 沈阳航天誉兴机械制造有限公司 | Expansion fracture connecting rod assembly of engine piston |
| CN106903492A (en) * | 2017-04-06 | 2017-06-30 | 北京北内柴油机有限责任公司 | Engine link rises disconnected method processing technology |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180615 |