CN109590693A - A kind of manufacturing method of excavator cast connecting rod - Google Patents
A kind of manufacturing method of excavator cast connecting rod Download PDFInfo
- Publication number
- CN109590693A CN109590693A CN201910047761.5A CN201910047761A CN109590693A CN 109590693 A CN109590693 A CN 109590693A CN 201910047761 A CN201910047761 A CN 201910047761A CN 109590693 A CN109590693 A CN 109590693A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- excavator
- casting
- manufacturing
- sand
- 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.)
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Classifications
-
- 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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
Abstract
The invention discloses a kind of manufacturing process of excavator cast connecting rod, the technique is the following steps are included: casting mould design and manufacture, sand mold manufacture, molten steel and casting, heat treatment, flaw detection, machining；Wherein, based on link mechanism stress and casting thermal center simulation analysis, feeding head is arranged in the lateral location of connecting rod, avoids crucial stress and cambered surface position；In modeling process, using the nice foundry sand of about 30mm thickness as facing sand, remaining uses water-glass sand；It uses in the process segment to borer skill.Replace common overhead riser feeding technique by side riser, it eliminates because of riser cutting and component segregation, influence to key position, improve cast connecting rod appearance regularity, meanwhile using nice foundry sand technique, solves the problems, such as casting scab, the presentation quality of cast connecting rod is promoted, in addition guarantees connecting rod concentricity using to the processing technology of boring；The present invention improves cast connecting rod reliability, my company's cast connecting rod crash rate is reduced to 0 by 10%.
Description
Technical field
The invention belongs to metal casting technique fields, the casting technique especially suitable for large excavator component connecting rod.
Background technique
The shovel of large-sized mining dredger, the materials such as ore, coal and tailing for glory-hole pretends industry, and general point
It is wherein that bucket capacity is big, operation effect the characteristics of mine excavator for hydraulic excavator for mine, Suo Dou power shovel and rope pulling scraper three categories
Rate is high.It is constantly applied to mine equipment with new and high technology, and fills demand to adapt to the shovel of the mine truck increasingly increased,
Excavator just develops towards enlarged direction.Large-sized mining dredger working environment is severe, complicated, wants to the stability of structural member
Ask very high；The connecting rod for connecting oil cylinder and equipment, as main force part, Performance And Reliability is complete machine advance
Important symbol.Part connecting rod uses welding structure, but impact resistance is poor, and fatigue life is short；Steel-casting is by uniform
Mechanical performance, gliding surfaces bring high fatigue life gradually become the mainstay scheme of connecting rod.
However, the fatigue life of large excavator cast connecting rod is unsatisfactory in the market by investigation, crash rate occupies height not
Under.
Summary of the invention
The present invention provides a kind of manufacturing method of excavator cast connecting rod, to solve the deficiencies in the prior art.
The present invention is realized by following technical scheme:
A kind of manufacturing method of excavator cast connecting rod, the manufacturing method are as follows:
A) casting mould design and manufacture: based on link mechanism stress and casting thermal center simulation analysis, completing casting mould design,
And the manufacture of aluminium-making mould；
B) sand mold manufactures: being based on aluminium-making mould, is layered reality of pounding, completes sand mold manufacture；
C) molten steel and casting: molten steel is completed using intermediate frequency, bottom filling ladle completes casting.
D) it is heat-treated: completing the heat treatment of quenching, high tempering.
E) it detects a flaw: completing ultrasonic wave and magnetic powder inspection.
F) it machines: completing the processing of connecting rod axis hole and hole end surface.
Further, in step a, mold design uses the lateral location that feeding head is arranged in connecting rod, avoids key
The scheme of stress and complex-curved position.
Further, in step b, for sand mold using the nice foundry sand of 30mm thickness as facing sand, remaining uses water-glass sand.
Further, in step c, molten steel composition composition: C:0.25%-0.3%, Si:0.3%-0.5%, Mn:0.6%-
1.0%、P:0-0.03%、S:0-0.03%、Al:0.02-0.05%。
Further, molten steel casting time is less than 24H apart from the moulding deadline, and overcast and rainy wet weather is less than 12H.
Further, in step d, heat treatment are as follows: heating temperature is to 900 DEG C -940 DEG C, 160 min-200 of soaking time
Min, water cooling, medium temperature is less than 30 DEG C；Relation reheating temperature is to 580 DEG C -620 DEG C, soaking time >=240min, water cooling, medium
Temperature is less than 30 DEG C.
Further, heating for the first time is heated intermediate with second, and time interval is less than 3H.
Further, in step e, completion roughing first, then ultrasonic examination；Axis hole finally is completed to borer skill
Finishing.
The invention has the advantages that:
The present invention is based on link mechanism stress and casting thermal center simulation analysis, and feeding head is arranged in the lateral location of connecting rod,
Avoid crucial stress and cambered surface position；In modeling process, using the nice foundry sand of 30mm thickness as facing sand, remaining uses water glass
Glass sand；It uses in the process segment to borer skill.Replace common overhead riser feeding technique by side riser, eliminates because of riser
Cutting and component segregation, the influence to key position, improve cast connecting rod appearance regularity, meanwhile, using nice foundry sand technique,
It solves the problems, such as casting scab, promotes the presentation quality of cast connecting rod, in addition guarantee that connecting rod is coaxial using to the processing technology of boring
Degree；The present invention improves cast connecting rod reliability by specific mold design, sand mold moulding and processing technology, by my company
Cast connecting rod crash rate is reduced to 0 by 10%.
Detailed description of the invention
Fig. 1 is a kind of casting mould structure figure of excavator connecting rod.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label indicate same or similar element or element with the same or similar functions.Described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.Under
Face is described in detail the embodiment of the present invention in conjunction with attached drawing.
A kind of manufacturing method of excavator cast connecting rod, the manufacturing method are as follows:
A) casting mould design and manufacture: based on link mechanism stress and casting thermal center simulation analysis, completing casting mould design,
And the manufacture of aluminium-making mould, wherein mold design uses, and feeding head is arranged in the lateral location of connecting rod, avoid it is crucial by
The scheme of power and complex-curved position.As shown in Figure 1, feeding head I 2, feeding head II 3 are located at the side of cast connecting rod 8, mend
Contracting riser III 4, feeding head IV 5 are located at the other side of cast connecting rod 8, and profile-followed chill I 6, profile-followed chill II 7 are located at cast connecting rod
8 both ends.
B) sand mold manufactures: cleaning template model brush release agent is added molding sand, is layered reality of pounding, and completes sand mold manufacture, wherein
For sand mold using the nice foundry sand of about 30mm thickness as facing sand, remaining uses water-glass sand.
C) molten steel and casting: molten steel is completed using intermediate frequency, bottom filling ladle completes casting, wherein molten steel composition
Composition: C:0.25%-0.3%, Si:0.3%-0.5%, Mn:0.6%-1.0%, P:0-0.03%, S:0-0.03%, Al:0.02-
0.05%；Molten steel casting time is less than 24H apart from the moulding deadline, and overcast and rainy wet weather is less than 12H.
D) it is heat-treated: completing the heat treatment of quenching, high tempering, wherein heat treatment process are as follows: heating temperature to 920 ± 20
DEG C, 180 ± 20 min of soaking time, water cooling, medium temperature is less than 40 DEG C；Relation reheating temperature to 550 ± 20 DEG C, soaking time >=
240min, water cooling, medium temperature is less than 40 DEG C；Wherein second of heating is heated intermediate with third time, and time interval is less than 3H.
E) it detects a flaw: completing ultrasonic wave and magnetic powder inspection.
F) it machines: completing the processing of connecting rod axis hole and hole end surface.Roughing, then ultrasonic examination are completed first；Most
Axis hole finishing is completed to borer skill afterwards.
It can to sum up obtain, the present invention is based on link mechanism stress and casting thermal center simulation analysis, by feeding head setting even
The lateral location of bar avoids crucial stress and cambered surface position；In modeling process, using the nice foundry sand of 30mm thickness as face
Sand, remaining uses water-glass sand；It uses in the process segment to borer skill.Replace common overhead riser feeding work by side riser
Skill eliminates the influence because of riser cutting and component segregation, to key position, improves cast connecting rod appearance regularity, meanwhile,
Using nice foundry sand technique, solves the problems, such as casting scab, promote the presentation quality of cast connecting rod, in addition using the processing work to boring
Skill guarantees connecting rod concentricity；For the present invention by specific mold design, sand mold moulding and processing technology, improving cast connecting rod can
By property, my company's cast connecting rod crash rate is reduced to 0 by 10%.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (8)
1. a kind of manufacturing method of excavator cast connecting rod, which is characterized in that the manufacturing method is as follows:
A) casting mould design and manufacture: based on link mechanism stress and casting thermal center simulation analysis, completing casting mould design,
And the manufacture of aluminium-making mould；
B) sand mold manufactures: being based on aluminium-making mould, is layered reality of pounding, completes sand mold manufacture；
C) molten steel and casting: molten steel is completed using intermediate frequency, bottom filling ladle completes casting.
D) it is heat-treated: completing the heat treatment of quenching, high tempering.
E) it detects a flaw: completing ultrasonic wave and magnetic powder inspection.
F) it machines: completing the processing of connecting rod axis hole and hole end surface.
2. the manufacturing method of the excavator cast connecting rod according to claim 1, it is characterised in that: in step a, mould
Tool design avoids the scheme of crucial stress and complex-curved position using the lateral location that feeding head is arranged in connecting rod.
3. the manufacturing method of the excavator cast connecting rod according to claim 1, it is characterised in that: in step b, sand mold
Using the nice foundry sand of 30mm thickness as facing sand, remaining uses water-glass sand.
4. the manufacturing method of the excavator cast connecting rod according to claim 1, it is characterised in that: in step c, molten steel
At being grouped as: C:0.25%-0.3%, Si:0.3%-0.5%, Mn:0.6%-1.0%, P:0-0.03%, S:0-0.03%, Al:0.02-
0.05%。
5. the manufacturing method of excavator cast connecting rod according to claim 4, it is characterised in that: molten steel casting time away from
It is less than 24H from the moulding deadline, overcast and rainy wet weather is less than 12H.
6. the manufacturing method of the excavator cast connecting rod according to claim 1, it is characterised in that: in step d, at heat
Reason are as follows: heating temperature is to 900 DEG C -940 DEG C, and 160 min-200 min of soaking time, water cooling, medium temperature is less than 30 DEG C；Again plus
Hot temperature is to 580 DEG C -620 DEG C, and soaking time >=240min, water cooling, medium temperature is less than 30 DEG C.
7. the manufacturing method of excavator cast connecting rod according to claim 7, it is characterised in that: heating and second for the first time
Among secondary heating, time interval is less than 3H.
8. the manufacturing method of the excavator cast connecting rod according to claim 1, it is characterised in that: in step e, first
Complete roughing, then ultrasonic examination；Axis hole finishing finally is completed to borer skill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910047761.5A CN109590693A (en) | 2019-01-18 | 2019-01-18 | A kind of manufacturing method of excavator cast connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910047761.5A CN109590693A (en) | 2019-01-18 | 2019-01-18 | A kind of manufacturing method of excavator cast connecting rod |
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| Publication Number | Publication Date |
|---|---|
| CN109590693A true CN109590693A (en) | 2019-04-09 |
Family
ID=65965437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910047761.5A Pending CN109590693A (en) | 2019-01-18 | 2019-01-18 | A kind of manufacturing method of excavator cast connecting rod |
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| Country | Link |
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| CN (1) | CN109590693A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202094A (en) * | 2019-06-13 | 2019-09-06 | 洛阳洛北重工机械有限公司 | A kind of casting method of large-duty loader swing arm seat beam |
Citations (6)
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| US4157607A (en) * | 1976-12-22 | 1979-06-12 | Ford Motor Company | Method of manufacturing an internal combustion engine cylinder head |
| CN1123336A (en) * | 1994-11-23 | 1996-05-29 | 河北铸造厂 | Method for producing cast connecting rod of engine |
| CN104015298A (en) * | 2014-06-13 | 2014-09-03 | 苏州弘远机械制造有限公司 | Fixed plate of spheroidal graphite cast iron injection molding machine and casting method for fixed plate |
| CN104209471A (en) * | 2014-07-10 | 2014-12-17 | 陕西国德电气制造有限公司 | Preparation method of triplet shell casting |
| CN105402243A (en) * | 2015-12-18 | 2016-03-16 | 河北鼎邦机械设备有限公司 | Integrally cast connecting rod of coal mining machine and processing technology of integrally cast connecting rod |
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2019
- 2019-01-18 CN CN201910047761.5A patent/CN109590693A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| US4157607A (en) * | 1976-12-22 | 1979-06-12 | Ford Motor Company | Method of manufacturing an internal combustion engine cylinder head |
| CN1123336A (en) * | 1994-11-23 | 1996-05-29 | 河北铸造厂 | Method for producing cast connecting rod of engine |
| CN104015298A (en) * | 2014-06-13 | 2014-09-03 | 苏州弘远机械制造有限公司 | Fixed plate of spheroidal graphite cast iron injection molding machine and casting method for fixed plate |
| CN104209471A (en) * | 2014-07-10 | 2014-12-17 | 陕西国德电气制造有限公司 | Preparation method of triplet shell casting |
| CN105402243A (en) * | 2015-12-18 | 2016-03-16 | 河北鼎邦机械设备有限公司 | Integrally cast connecting rod of coal mining machine and processing technology of integrally cast connecting rod |
| CN109158536A (en) * | 2018-10-29 | 2019-01-08 | 扬州广润机械有限公司 | A kind of casting technique of preventing car magnesium iron steering gear housing casting leakage |
Non-Patent Citations (2)
| Title |
|---|
| 关润浩: "《钢铸件凝固控制及冒口设计》", 30 November 1987, 冶金工业出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202094A (en) * | 2019-06-13 | 2019-09-06 | 洛阳洛北重工机械有限公司 | A kind of casting method of large-duty loader swing arm seat beam |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190409 |
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| RJ01 | Rejection of invention patent application after publication |