CN111876658B - Casting method of mechanical arm of industrial robot - Google Patents
Casting method of mechanical arm of industrial robot Download PDFInfo
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- CN111876658B CN111876658B CN202010923574.1A CN202010923574A CN111876658B CN 111876658 B CN111876658 B CN 111876658B CN 202010923574 A CN202010923574 A CN 202010923574A CN 111876658 B CN111876658 B CN 111876658B
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- iron
- nodulizer
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- inoculant
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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
- C22C37/04—Cast-iron alloys containing spheroidal graphite
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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
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/007—Treatment of the fused masses in the supply runners
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
- C21C1/105—Nodularising additive agents
-
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a casting method of an industrial robot mechanical arm, which comprises the following steps: compared with the prior art, the invention has the advantages of simple structure, reasonable design, good mechanical performance of the cast mechanical arm, strong fatigue resistance, accurate size, clean inner cavity, no sand adhesion and no fash, and meets the use requirements of actual work.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of casting methods, in particular to a casting method of an industrial robot mechanical arm.
[ background of the invention ]
The localization of core parts of the industrial robot affects the industrial structure, and the significance is profound. Industrial robots have become an important marker for measuring the state of manufacturing and technology as an irreplaceable and important equipment and means in advanced manufacturing. At present, China is in an important period for accelerating transformation and upgrading, and the robot industry mainly using industrial robots is just important path selection for solving the problems of cost rise and environmental restriction of the industry in China. The market of the Chinese industrial robot is continuously strong in recent years, and the market capacity is continuously expanded.
In practical application, the robot arm needs to move for a long time and can bear certain gravity, the large arm can be in a fatigue state for a long time, and the large arm cast by the prior art cannot meet the requirement of long-time use in practical work, so that a casting method of the industrial robot arm is needed.
[ summary of the invention ]
The casting method of the mechanical arm of the industrial robot is simple in structure and reasonable in design, the mechanical arm obtained by casting is good in mechanical performance, strong in fatigue resistance, accurate in size, clean in inner cavity, free of sand adhesion and fash, and the use requirement of actual work is met.
In order to achieve the purpose, the invention provides a casting method of an industrial robot mechanical arm, which comprises the following steps:
A) smelting furnace charge: 50-70% of pig iron, 25-40% of foundry returns and 5-20% of scrap steel by mass percent are put into an electric furnace for smelting to obtain molten base iron, then slag on the surface of the molten base iron is filtered out, and the molten base iron is sampled and detected;
B) spheroidizing and inoculating the original molten iron: preheating a nodulizer, an inoculant and a slag conglomeration agent by using an electric heating furnace, then adding the preheated nodulizer, the inoculant and the slag conglomeration agent into a nodulizing ladle, firstly placing the nodulizer at the bottom of the nodulizing ladle, then laying one third of the inoculant on the nodulizer, finally covering the nodulizer, perlite and an iron plate, flushing two thirds of molten base iron into the nodulizing ladle for nodulizing, after the nodulizing reaction is finished, adding the remaining two thirds of the inoculant into the nodulizing ladle along with the remaining molten base iron, and simultaneously uniformly stirring;
C) and (3) spheroidization quality detection: after the molten iron reaction is finished, stirring, slagging off and sampling, checking the spheroidization quality and sampling and detecting the finished molten iron;
D) pouring: and (3) coating the interior of the sand core, wherein the coating is a high-temperature-resistant zircon powder coating, large ferrosilicon is put into the finished molten iron for stream inoculation before casting, and the casting with the casting is cooled to room temperature after casting is finished, so that a formed casting is obtained.
Preferably, the electric furnace in the step A) is a medium-frequency induction electric furnace, and the smelting temperature of the electric furnace is 1480-1550 ℃.
Preferably, the preferable mass percentages of the pig iron, the foundry returns and the scrap steel in the step A) are 60%, 30% and 10%, and the pig iron is Q12 nodular pig iron.
Preferably, the molten iron in the step a) comprises the following chemical components in percentage by weight: c: 3.65-3.8%, Si: 1.5-1.7%, Mn: 0.3-0.45%, P: < 0.1%, S: the balance of less than 0.04% Fe and inevitable impurities.
Preferably, the preheating temperature of the nodulizer, the inoculant and the slag conglomeration agent in the step B) is 150-400 ℃, the adding amount of the nodulizer, the inoculant and the slag conglomeration agent is respectively 1.4-1.6%, 1.0-1.1% and 0.02% of the melted iron amount, the nodulizer is a rare earth magnesium silicon iron alloy, the granularity of the nodulizer is 20-30mm, the inoculant is 75SiFe, the granularity of the inoculant is 3-15mm, and the slag conglomeration agent is sodium chloride.
Preferably, the finished molten iron in the step C) comprises the following chemical components in percentage by weight: c: 3.6-3.75%, Si: 2.5-2.7%, Mn: 0.3-0.45%, P: < 0.1%, S: < 0.02%, Re: 0.02-0.05%, Mg0.03-0.07%, and the balance Fe and inevitable impurities.
Preferably, the bulk ferrosilicon in the step D) is 70 ferrosilicon, the addition amount of the bulk ferrosilicon is 0.1-0.2% of the amount of smelted iron, and the pouring temperature is 1350-.
Preferably, the metallographic structure of the formed casting obtained in the step D) is that the nodularity is more than 85 percent, the graphite size is 5-8 grades, the nodularization grading is 1-4 grades, and the total sum of cementite and phosphorus eutectic is less than 2 percent.
The invention has the beneficial effects that: the casting machine is simple in structure and reasonable in design, the nodular cast iron of QT450-10 is used as a raw material for casting, the mechanical arm obtained by casting is good in mechanical property, strong in fatigue resistance and accurate in size, the high-temperature-resistant zircon powder coating is coated inside the sand core, the tendency of sand sticking of the inner cavity is reduced, the inner cavity of the casting is further clean, no sand sticking exists, no fash occurs, and the use requirement of actual work is met.
The features and advantages of the present invention will be described in detail by way of examples.
[ detailed description ] embodiments
The invention discloses a casting method of an industrial robot mechanical arm, which comprises the following steps:
A) smelting furnace charge: 50-70% of pig iron, 25-40% of foundry returns and 5-20% of scrap steel by mass percent are put into an electric furnace for smelting to obtain molten base iron, then slag on the surface of the molten base iron is filtered out, and the molten base iron is sampled and detected;
B) spheroidizing and inoculating the original molten iron: preheating a nodulizer, an inoculant and a slag conglomeration agent by using an electric heating furnace, then adding the preheated nodulizer, the inoculant and the slag conglomeration agent into a nodulizing ladle, firstly placing the nodulizer at the bottom of the nodulizing ladle, then laying one third of the inoculant on the nodulizer, finally covering the nodulizer, perlite and an iron plate, flushing two thirds of molten base iron into the nodulizing ladle for nodulizing, after the nodulizing reaction is finished, adding the remaining two thirds of the inoculant into the nodulizing ladle along with the remaining molten base iron, and simultaneously uniformly stirring;
C) and (3) spheroidization quality detection: after the molten iron reaction is finished, stirring, slagging off and sampling, checking the spheroidization quality and sampling and detecting the finished molten iron;
D) pouring: and (3) coating the interior of the sand core, wherein the coating is a high-temperature-resistant zircon powder coating, large ferrosilicon is put into the finished molten iron for stream inoculation before casting, and the casting with the casting is cooled to room temperature after casting is finished, so that a formed casting is obtained.
Wherein, the electric furnace in the step A) is a medium-frequency induction electric furnace, and the smelting temperature of the electric furnace is 1480-1550 ℃.
The preferable mass percentages of the pig iron, the foundry returns and the scrap steel in the step A) are 60%, 30% and 10%, and the pig iron is Q12 nodular cast iron.
Wherein, the chemical compositions in percentage by weight of the molten iron in the step A) are as follows: c: 3.65-3.8%, Si: 1.5-1.7%, Mn: 0.3-0.45%, P: < 0.1%, S: the balance of less than 0.04% Fe and inevitable impurities.
Wherein, the preheating temperature of the nodulizer, the inoculant and the slag conglomeration agent in the step B) is 150-400 ℃, the adding amount of the nodulizer, the inoculant and the slag conglomeration agent is respectively 1.4-1.6%, 1.0-1.1% and 0.02% of the melted iron amount, the nodulizer is rare earth magnesium silicon iron alloy, the granularity of the nodulizer is 20-30mm, the inoculant is 75SiFe, the granularity of the inoculant is 3-15mm, and the slag conglomeration agent is sodium chloride.
Wherein the finished molten iron in the step C) comprises the following chemical components in percentage by weight: c: 3.6-3.75%, Si: 2.5-2.7%, Mn: 0.3-0.45%, P: < 0.1%, S: < 0.02%, Re: 0.02-0.05%, Mg0.03-0.07%, and the balance Fe and inevitable impurities.
Wherein the bulk ferrosilicon in the step D) is 70 ferrosilicon, the adding amount of the bulk ferrosilicon is 0.1-0.2% of the amount of smelted iron, and the pouring temperature is 1350-.
Wherein the metallographic structure of the formed casting obtained in the step D) is that the nodularity is more than 85 percent, the graphite size is 5-8 grades, the nodularization grading is 1-4 grades, and the total sum of cementite and phosphorus eutectic is less than 2 percent.
In addition, the sand core is fixed by adopting a hexagonal core head, the periphery of the core head is enlarged and extended out, the sand core can not move after core setting, so that the stability of the sand core is ensured, and the ceramic filter screen can effectively prevent slag inclusion and tiny oxidizing slag from flowing in and ensure the quality of a casting by adopting the ceramic filter screen type pouring gate design.
Compared with the prior art, the invention has the beneficial effects that: the casting machine is simple in structure and reasonable in design, the nodular cast iron of QT450-10 is used as a raw material for casting, the mechanical arm obtained by casting is good in mechanical performance, strong in fatigue resistance and accurate in size, the high-temperature-resistant zircon powder coating is coated inside the sand core, the inclination of sand sticking of the inner cavity is reduced, the inner cavity of the casting is clean, no sand sticking exists, no flash exists, and the use requirement of actual work is met.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (4)
1. A casting method of an industrial robot mechanical arm is characterized by comprising the following steps: the method comprises the following steps:
A) smelting furnace charge: 50-70% of pig iron, 25-40% of foundry returns and 5-20% of scrap steel by mass percent are placed in an electric furnace for smelting to obtain base iron, then slag on the surface of the base iron is filtered out, the base iron is sampled and detected, the electric furnace is a medium-frequency induction electric furnace, and the smelting temperature of the electric furnace is 1480-; the molten base iron comprises the following chemical components in percentage by weight: c: 3.65-3.8%, Si: 1.5-1.7%, Mn: 0.3-0.45%, P: < 0.1%, S: less than 0.04% and the balance Fe and unavoidable impurities;
B) spheroidizing and inoculating the original molten iron: preheating a nodulizer, an inoculant and a slag conglomeration agent by using an electric heating furnace, then adding the preheated nodulizer, the inoculant and the slag conglomeration agent into a nodulizing ladle, firstly placing the nodulizer at the bottom of the nodulizing ladle, then laying one third of the inoculant on the nodulizer, finally covering the nodulizer, perlite and an iron plate, flushing two thirds of molten iron into the nodulizing ladle for nodulizing, after the nodulizing reaction is finished, adding the remaining two thirds of the inoculant into the nodulizing ladle along with the remaining molten iron, and uniformly stirring, wherein the preheating temperature of the nodulizer, the inoculant and the slag conglomeration agent is 400 ℃, the adding amount of the nodulizer, the inoculant and the slag conglomeration agent is respectively 1.4-1.6%, 1.0-1.1.02% and 0.02% of the melted iron amount, the nodulizer is a rare earth magnesium silicon iron alloy, the granularity of the nodulizer is 20-30mm, the inoculant is 75SiFe, the granularity of the inoculant is 3-15mm, and the slag conglomeration agent is sodium chloride; the finished molten iron comprises the following chemical components in percentage by weight: c: 3.6-3.75%, Si: 2.5-2.7%, Mn: 0.3-0.45%, P: < 0.1%, S: < 0.02%, Re: 0.02-0.05%, Mg0.03-0.07%, and the balance Fe and inevitable impurities;
C) and (3) spheroidization quality detection: after the molten iron reaction is finished, stirring, slagging off and sampling, checking the spheroidization quality and sampling and detecting the finished molten iron;
D) pouring: and (3) coating the interior of the sand core, wherein the coating is a high-temperature-resistant zircon powder coating, large ferrosilicon is put into the finished molten iron for stream inoculation before casting, and the casting with the casting is cooled to room temperature after casting is finished, so that a formed casting is obtained.
2. A casting method of a robot arm of an industrial robot according to claim 1, characterized in that: the preferable mass percentages of the pig iron, the foundry returns and the scrap steel in the step A) are 60%, 30% and 10%, and the pig iron is Q12 nodular cast iron.
3. A casting method of a robot arm of an industrial robot according to claim 1, characterized in that: the bulk ferrosilicon in the step D) is 70 ferrosilicon, the adding amount of the bulk ferrosilicon is 0.1-0.2% of the amount of smelted iron, and the pouring temperature is 1350-.
4. A casting method of a robot arm of an industrial robot according to claim 1, characterized in that: the metallographic structure of the formed casting obtained in the step D) is that the nodularity is more than 85 percent, the graphite size is 5-8 grades, the nodularization grading is 1-4 grades, and the total sum of cementite and phosphorus eutectic is less than 2 percent.
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| CN202010923574.1A CN111876658B (en) | 2020-09-04 | 2020-09-04 | Casting method of mechanical arm of industrial robot |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078956A (en) * | 2009-12-01 | 2011-06-01 | 上海华新合金有限公司 | Method for casting mechanical arm casting of robot |
| CN111020357A (en) * | 2019-11-22 | 2020-04-17 | 湖北省丹江口丹传汽车传动轴有限公司 | Production method for batch production of stable pearlite nodular cast iron QT500-7 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927499B (en) * | 2009-06-23 | 2012-08-01 | 上海华新合金有限公司 | Method for making robot base casting |
| CN106636868A (en) * | 2016-12-16 | 2017-05-10 | 广西大学 | Cast iron machine tool body and preparation method thereof |
| CN107043841B (en) * | 2017-03-15 | 2019-03-01 | 江苏宏德特种部件股份有限公司 | A kind of spheroidization and inoculation treatment process of spheroidal graphite cast-iron |
| CN107142416B (en) * | 2017-03-15 | 2018-08-21 | 江苏宏德特种部件股份有限公司 | A kind of method of production of wind-powered electricity generation high-strength and high ductility spheroidal graphite cast-iron |
| CN107052245A (en) * | 2017-04-05 | 2017-08-18 | 南通宏德机电有限公司 | A kind of axis products manufacture method of heavy section ductile iron |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078956A (en) * | 2009-12-01 | 2011-06-01 | 上海华新合金有限公司 | Method for casting mechanical arm casting of robot |
| CN111020357A (en) * | 2019-11-22 | 2020-04-17 | 湖北省丹江口丹传汽车传动轴有限公司 | Production method for batch production of stable pearlite nodular cast iron QT500-7 |
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