CN108359881A - A kind of square ram solidified structure control method of large-sized numerical control floor type boring machine - Google Patents
A kind of square ram solidified structure control method of large-sized numerical control floor type boring machine Download PDFInfo
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- CN108359881A CN108359881A CN201810182933.5A CN201810182933A CN108359881A CN 108359881 A CN108359881 A CN 108359881A CN 201810182933 A CN201810182933 A CN 201810182933A CN 108359881 A CN108359881 A CN 108359881A
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- molten iron
- iron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/08—Shaking, vibrating, or turning of moulds
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of square ram solidified structure control methods of large-sized numerical control floor type boring machine, including following processing step：Furnace charge is first put into melting in induction furnace, wherein furnace charge is made of the raw material of following parts by weight：27 28 parts of cast iron, 45 parts of high-carbon steel, 23 parts of corronil, 56 parts of iron-nickel alloy are put into induction furnace, and heating is smelted into molten iron, and 3 5% NbC of molten iron total weight is added in fusion process as grain refiner；Molten iron is cast in using center casting method in mold die again, 200 300 DEG C are preheating to before mold die cast, it is 30 100KHZ to use ultrasonic activation, ultrasonic frequency to mold die after casting complete, time is 10 15min, and ultrasonic vibration generates cavitation in the liquid phase.The present invention is by controlling solidified structure mode, the strength character of the side's of improving ram, to meet the requirement of large-sized numerical control floor type boring machine.
Description
Technical field
The present invention relates to large-sized numerical control floor type boring machine fields, and it is solidifying to particularly belong to a kind of square ram of large-sized numerical control floor type boring machine
Gu organizational controls method.
Background technology
Numerical control floor boring machine has the machining functions such as bore hole, drilling, milling, grooving;Mix high-precision rotary working-table, straight
The processing of five faces may be implemented in the function accessories such as angular milling head, is that the industries such as metallurgy, the energy, electric power are used for steam turbine, generator and again
The ideal equipment of the heavy parts such as type machinery processing.Rigidity, the dynamic property of side's ram therein process the complete machine of lathe
Performance influence is very big, wherein the material selection of square ram is also a key factor.
The control of the Solidification Structures of square ram is mainly the control of grain form and phase structure, and phase structure is in very great Cheng
The ingredient of alloy is depended on degree, and grain form and its size are determined by process of setting.
Invention content
The object of the present invention is to provide a kind of square ram solidified structure control methods of large-sized numerical control floor type boring machine, pass through control
Solidified structure mode processed, the strength character of the side's of improving ram, to meet the requirement of large-sized numerical control floor type boring machine.
Technical scheme is as follows：
A kind of square ram solidified structure control method of large-sized numerical control floor type boring machine, including following processing step：First furnace charge is put
Enter melting in induction furnace, wherein furnace charge is made of the raw material of following parts by weight：27-28 parts of cast iron, 4-5 parts of high-carbon steel, cupro-nickel are closed
2-3 parts golden, 5-6 parts of iron-nickel alloy is put into induction furnace, and heating is smelted into molten iron, and the 3- of molten iron total weight is added in fusion process
5% NbC is as grain refiner, and each chemical composition mass percentage is in molten iron in induction furnace：C 3.05-3.15%、Si
1.25-1.35%, Mn 1.2-1.3%, P 0.04-0.07%, S 0.08-0.09%, Cu 0.47-0.48%, surplus Fe；Again will
Molten iron is cast in using center casting method in mold die, and 200-300 DEG C is preheating to before mold die cast, right after casting complete
Mold die uses ultrasonic activation, and ultrasonic frequency 30-100KHZ, time 10-15min, ultrasonic vibration is in the liquid phase
Generate cavitation.
Each chemical composition mass percentage is in molten iron in the induction furnace：C 3.1%、Si 1.3%、Mn 1.25%、
P 0.055%, S 0.085%, Cu 0.4758%, surplus Fe.
Ultrasonic activation, ultrasonic frequency 60KHZ, time 12min are used to mold die after the casting complete.
Each reasonable raw material proportioning in the furnace charge of the present invention ensure that each alloying component proportioning is appropriate in melt, crystal grain refinement
Agent is added in liquid metals, the very strong heterogeneous nucleus of a large amount of nucleation abilities is introduced, to achieve the purpose that crystal grain, and ultrasonic vibration
Cavitation is generated in the liquid phase and forms gap, and when gap collapses, liquid supplements rapidly, and the momentum of liquid flowing is very big, production
Raw very high pressure plays the role of promoting forming core；By control solidified structure mode, the strength character of the side's of improving ram,
To meet the requirement of large-sized numerical control floor type boring machine.
Specific implementation mode
Embodiment one：
A kind of square ram solidified structure control method of large-sized numerical control floor type boring machine, including following processing step：First furnace charge is put
Enter melting in induction furnace, wherein furnace charge is made of the raw material of following parts by weight：27.5 parts of cast iron, 4.5 parts of high-carbon steel, corronil
2.5 parts, 5.5 parts of iron-nickel alloy be put into induction furnace, heating is smelted into molten iron, and the 4% of molten iron total weight is added in fusion process
NbC is as grain refiner, and each chemical composition mass percentage is in molten iron in induction furnace：C 3.1%、Si 1.3%、Mn
1.25%, P 0.055%, S 0.085%, Cu 0.4758%, surplus Fe；Molten iron is cast in casting mold using center casting method again
In mold, it is preheating to 200-300 DEG C before mold die cast, ultrasonic activation, ultrasound are used to mold die after casting complete
Wave frequency rate is 60KHZ, time 12min, and ultrasonic vibration generates cavitation in the liquid phase.
Embodiment two：
A kind of square ram solidified structure control method of large-sized numerical control floor type boring machine, including following processing step：First furnace charge is put
Enter melting in induction furnace, wherein furnace charge is made of the raw material of following parts by weight：28 parts of cast iron, 5 parts of high-carbon steel, 3 parts of corronil,
6 parts of iron-nickel alloy is put into induction furnace, and heating is smelted into molten iron, and 5% NbC conducts of molten iron total weight are added in fusion process
Grain refiner, each chemical composition mass percentage is in molten iron in induction furnace：C 3.15%、Si1.35%、Mn 1.3%、P
0.07%, S 0.09%, Cu 0.48%, surplus Fe；Molten iron is cast in using center casting method in mold die again, casting mold mould
Tool cast before be preheating to 300 DEG C, after casting complete to mold die use ultrasonic activation, ultrasonic frequency 100KHZ, when
Between be 15min, ultrasonic vibration generates cavitation in the liquid phase.
Claims (3)
1. a kind of square ram solidified structure control method of large-sized numerical control floor type boring machine, which is characterized in that walked including following processing
Suddenly：Furnace charge is first put into melting in induction furnace, wherein furnace charge is made of the raw material of following parts by weight：27-28 parts of cast iron, high-carbon steel
4-5 parts, 2-3 parts of corronil, 5-6 parts of iron-nickel alloy be put into induction furnace, heating is smelted into molten iron, and iron is added in fusion process
The NbC of the 3-5% of water total weight is as grain refiner, and each chemical composition mass percentage is in molten iron in induction furnace：C
3.05-3.15%, Si 1.25-1.35%, Mn 1.2-1.3%, P 0.04-0.07%, S 0.08-0.09%, Cu 0.47-0.48%,
Surplus is Fe；Molten iron is cast in using center casting method in mold die again, 200-300 is preheating to before mold die cast
DEG C, use ultrasonic activation, ultrasonic frequency 30-100KHZ, time 10-15min to surpass mold die after casting complete
Acoustic vibration generates cavitation in the liquid phase.
2. square ram solidified structure control method according to claim 1, which is characterized in that in the induction furnace in molten iron
Each chemical composition mass percentage is：C 3.1%、Si 1.3%、Mn 1.25%、P 0.055%、S 0.085%、Cu
0.4758%, surplus Fe.
3. square ram solidified structure control method according to claim 1, which is characterized in that casting mold after the casting complete
Mold uses ultrasonic activation, ultrasonic frequency 60KHZ, time 12min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182933.5A CN108359881A (en) | 2018-03-06 | 2018-03-06 | A kind of square ram solidified structure control method of large-sized numerical control floor type boring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182933.5A CN108359881A (en) | 2018-03-06 | 2018-03-06 | A kind of square ram solidified structure control method of large-sized numerical control floor type boring machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108359881A true CN108359881A (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810182933.5A Pending CN108359881A (en) | 2018-03-06 | 2018-03-06 | A kind of square ram solidified structure control method of large-sized numerical control floor type boring machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894577A (en) * | 2019-03-19 | 2019-06-18 | 芜湖久弘重工股份有限公司 | A kind of casting technique of numerical control gantry machining center side's ram |
| CN110756732A (en) * | 2019-12-03 | 2020-02-07 | 安徽省含山县皖中减速机械有限公司 | Casting process for improving casting defects of speed reducer pin gear shell |
-
2018
- 2018-03-06 CN CN201810182933.5A patent/CN108359881A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894577A (en) * | 2019-03-19 | 2019-06-18 | 芜湖久弘重工股份有限公司 | A kind of casting technique of numerical control gantry machining center side's ram |
| CN110756732A (en) * | 2019-12-03 | 2020-02-07 | 安徽省含山县皖中减速机械有限公司 | Casting process for improving casting defects of speed reducer pin gear shell |
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Application publication date: 20180803 |