CN103769552B - Long-life safety reliable for pig machine forges pig mold and manufacture method thereof - Google Patents
Long-life safety reliable for pig machine forges pig mold and manufacture method thereof Download PDFInfo
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Abstract
The present invention discloses a kind of long-life safety reliable for pig machine and forges pig mold and manufacture method thereof, forging pig mold is by Forging Technology global formation, at least provided with two muscles less than high temperature liquid iron liquid level inside forging pig mold, internal for forging pig mold die cavity is separated at least three shaping mold cavity by muscle, forging pig mold lower end is provided with the overlap joint mouth Q for overlapping mutually with adjacent forging pig mold, forging pig mold upper end arranges the pig mold afterbody P corresponding with adjacent forging pig mold lower end overlap joint mouth, at least provided with two overfalls on overlap joint mouth Q, forging pig mold both sides are provided with molten iron and protect along M1 and M2 and ear T1 and T2 that be connected with carrier bar.Forging molding pig mold avoids as-cast metallographic structure's difference of casting pig mold and various casting flaws, is effectively increased pig mold heat resistive fatigue strength, improves pig mold security reliability, improves pig mold service life.
Description
Technical field
The invention belongs to casting die, concretely relating to a kind of for high temperature liquid iron being cast into the casting die on the pig machine of foundry pig iron or pig.
Background technology
In the production process of steel industry, the high temperature liquid iron direct casting that pig machine equipment goes out blast furnace process becomes iron block (being commonly called as bread ferrum).
At present, its material of pig mold that existing pig machine uses mostly is cast iron or cast steel.The pig mold of cast iron or cast steel in use, bears high/low temperature effect repeatedly, and its die cavity is internal and muscle easily cracks, and crackle gradually can strengthen, and even causes pig mold to rupture.The pig mold that crackle is big to be changed in time, and pig machine plant maintenance workload is the biggest.Pig mold quantity on pig machine has hundreds of pieces, and most reaches 1000 polyliths.And; after new pig machine puts into production; owing to the pig mold of cast iron or cast steel exists pore, the casting flaw such as loose unavoidably; and it is low to cast metallographic structure rank; wherein the pig mold of 3 ~ 5% can just produce big crackle in using very short time at initial stage; even rupture, use unit to cause very burden to pig machine equipment, and this problem also long-standing problem device fabrication unit.
China national Department of Intellectual Property granted patent on July 13rd, 2011 " a kind of pig mold of pig machine ", the patent No.: ZL200910172703.1, Authorization Notice No.: CN101758173B, disclose a kind of pig mold of pig machine.This pig mold adds rare earth element in cast steel ZG270-500, improves the mechanical performance of cast steel and anti-corrosion, heat resistance.But, this pig mold remains as as-cast metallographic structure, and unavoidably there is pore, the casting flaw such as loose, when batch uses this cast swage, still can not solve to produce big crackle during the use of pig mold initial stage, the technical barrier even ruptured, thus affect the production efficiency of pig machine, and bring potential safety hazard.
Summary of the invention
The present invention is in order to overcome above-mentioned deficiency, change the mode of production of the cast structure pig mold that the casting technique having been used up for a long time manufactures, solve existing pig mold above-mentioned technical problem present in the pig machine use process, propose a kind of long-life safety reliable for pig machine and forge pig mold and manufacture method thereof.
New forging pig mold manufacturing process is by using high-quality low-carbon (LC) rolled plate or clad steel plate, reduce the carbon content of pig mold, improve the ductility of pig mold, improve the performance of pig mold opposing thermal strain, improve pig mold and bear the heat shock resistance number of times of high temperature liquid iron, thus effectively slow down the too fast speed that crackle occurs of pig mold and degree, extend pig mold service life.
The new forging pig mold manufacturing process forging mold by structure reasonable in design, formulates rational process route, selects rational process equipment, it is achieved the disposable forging molding of pig mold, improve pig mold production efficiency, reduce resource consumption.
New forging pig mold manufacturing process can provide forging pig mold long-lived, safe and reliable for pig machine, the using effect of pig mold can be significantly improved, the maintenance management cost of pig mold can be significantly reduced, pig machine production capacity and production efficiency can be significantly improved.
For achieving the above object, the present invention is by the following technical solutions:
A kind of long-life safety reliable for pig machine forges pig mold, forging pig mold is by Forging Technology global formation, at least provided with two muscles less than high temperature liquid iron liquid level inside forging pig mold, internal for forging pig mold die cavity is separated at least three shaping mold cavity by muscle, forging pig mold is provided with the overlap joint mouth Q for overlapping mutually with adjacent forging pig mold along the lower end in molten iron direction, forging pig mold is arranged along the upper end in molten iron direction with adjacent forging pig mold along the lower end overlap joint corresponding pig mold afterbody P of mouth in molten iron direction, overlap joint is provided with at least two overfall (K1 and K2) on mouth outer, forging pig mold both sides are provided with molten iron and protect edge (M1 and M2) and the ear (T1 and T2) coupled with carrier bar.
The above-mentioned long-life safety reliable for pig machine forges pig mold, described forging pig mold bottom thickness b1 is 30-45mm, outside ramp thickness b2 is 25-35mm, muscle molding thickness b3 is 25-35mm, and bevel angle C is 50-70 °, and top fillet r1 is 5-15mm, overlap joint mouth end thickness b4 is 10-20mm, cross section inwall circular arc R 1 is 100-130mm, and outer wall circular arc R 2 is 130-175mm, and bottom surface, longitudinal section is plane or arc surface.
The above-mentioned long-life safety reliable for pig machine forges pig mold, described forging pig mold is trapezoidal, i.e. L2 > L1, forging pig mold width B3 is 270-480mm, width L3 is 760-960mm, forging pig mold with its above and below forging pig mold mutually overlap, pitch A of adjacent pig mold is 250-450mm, overlap joint mouth (Q) lower camber side of top forging pig mold is 3-6mm with lower section forging pig mold afterbody (P) cambered surface overlap joint gap e1, it is 4-8mm that overlap joint mouth (Q) lower plane of top forging pig mold overlaps gap e2 above with lower section forging pig mold afterbody (P).
The above-mentioned long-life safety reliable for pig machine forges pig mold, and the internal muscle height h1 of described forging pig mold is 50-80mm, and muscle exterior groove height h2 is 30-60mm.
The above-mentioned long-life safety reliable for pig machine forges pig mold, and it is 50-80mm that described forging pig mold both sides molten iron protects along height h3.
The above-mentioned long-life safety reliable for pig machine forges pig mold, the material of described forging pig mold is high-quality low carbon-structural steel steel plate or is high-temperature alloy steel and high-quality low carbon-structural steel clad steel plate, and thickness adds 10-20mm for forging pig mold bottom thickness b1.
The above-mentioned long-life safety reliable for pig machine forges pig mold, and described forging pig mold have employed Special middle frequency heating furnace and the heating coil made according to blanking shape, and heat time heating time is 5-10 minute, and heating-up temperature is 1100-1350 DEG C.
The above-mentioned long-life safety reliable for pig machine forges pig mold, and described forging pig mold have employed supporting special edger, and the forging pig mold of molding is processed without subsequent artefacts.
The weight of the product casting pig that the present invention makes is 40-90Kg(disjunctor), after being divided into three pieces, four pieces or six pieces, monomer weight is 6-30Kg.
Use technique scheme, present invention have the advantage that
1, structure: the forging pig mold being made up of the present invention is by monoblock steel plate forging molding, and one-shot forming goes out mold cavity muscle, overlaps mouth, molten iron protects edge and connect ear.Forging molding pig mold avoids the poor and various casting flaw of casting metallographic structure of casting pig mold, is effectively increased pig mold heat resistive fatigue strength, improves pig mold security reliability, improves pig mold service life.And, the thickness of forging pig mold muscle position can be accomplished as far as possible and forge bottom pig mold and the consistency of thickness of side, uniform wall thickness, reduce the impact that thermal stress is concentrated, thermal shock resistance is good, slow down the destructiveness of thermal stress during pig mold uses, delayed pig mold mold cavity or muscle position that the crackle time occurs, it is to avoid pig mold occurs suddenly breaking to form potential safety hazard.
2, material: the forging pig mold being made up of the present invention is by high-quality low carbon-structural steel rolled plate forging molding pig mold.Forging pig mold metallographic structure is uniform, and crystal grain is tiny, metallographic structure up to more than 3 grades, and, high-quality low carbon-structural steel rolled plate is lower than the cast steel phosphorus content generally used, elongation percentage δ >=25%.Compared with steel-casting pig mold, interior tissue concordance is preferable, near-zero defect.Forging pig mold is effectively increased pig mold heat resistive fatigue strength, improves pig mold security reliability, improves pig mold service life.Forging pig mold can also be improved pig mold heat resistive fatigue strength and security reliability thereof by heat-resisting alloy steel and monoblock steel plate high-quality low carbon-structural steel steel plate forging molding, improved service life further.Forging pig mold is long for service life, and cost performance is high.
3, dimensional accuracy: the forging pig mold being made up of the present invention uses special forging mold moulding process, dimensional accuracy is high, and interchangeability is good.Forging pig mold ear link bolt hole can use drilling machine to hole, it would however also be possible to employ forging molding, reduces manufacturing cost further, improves the application of forging pig mold.Can support the use with the cast swage of close overlap joint size, interchangeability and versatility are good simultaneously, have widened the range of application of forging pig mold.
Accompanying drawing explanation
Fig. 1 is the top view that the present invention forges pig mold.
Fig. 2 is the centrage longitudinal cross-section sectional view of Fig. 1.
Fig. 3 is the centrage lateral cross section sectional view of Fig. 2.
Fig. 4 is the sectional view that forging pig mold overlaps up and down.
Detailed description of the invention
Such as Fig. 1, Fig. 2, a kind of long-life safety reliable for pig machine shown in Fig. 3 and Fig. 4 forges pig mold, forging pig mold is by Forging Technology global formation, at least provided with two muscle J1 and J2 less than high temperature liquid iron liquid level inside forging pig mold, internal for forging pig mold die cavity is separated at least three shaping mold cavity N1 by muscle, N2, N3, forging pig mold is arranged on pig machine and mutually overlaps, move F from bottom to top, forging pig mold is provided with overlap joint mouth Q along the lower end in molten iron direction, overlap joint is provided with at least two overfall K1 and K2 on mouth outer, forging pig mold both sides are provided with molten iron and protect along M1 and M2 and ear T1 and T2 that couple with carrier bar.It is 50-80mm that forging pig mold both sides molten iron protects along height h3.In pig machine work process, high temperature liquid iron flows into pig mold by Molten iron chute, when filling pig mold above, then flows into next pig mold continuously by the overfall above its overlap joint mouth.Molten iron forms big iron in being cooled in die cavity, and big iron is separated into little iron block, is commonly called as bread ferrum by the muscle within pig mold.
It is 30-45mm that the present invention forges pig mold bottom thickness b1, outside ramp thickness b2 is 25-35mm, muscle molding thickness b3 is 25-35mm, bevel angle C is 50-70 °, top fillet r1 is 5-15mm, and overlap joint mouth end thickness b4 is 10-20mm, and cross section inwall circular arc R 1 is 100-130mm, outer wall circular arc R 2 is 130-175mm, and bottom surface, longitudinal section is plane or arc surface.Pig mold bottom thickness, outside ramp thickness and muscle molding thickness are the most uniformly to pig mold opposing high/low temperature alternating thermal stress effect the most clearly, and muscle is in pig machine work process, all the time it is in below high temperature liquid iron liquid level, is the place being easiest to crackle occurs.Forging pig mold solves the problem that wall unevenness is even very well, and is effectively utilized the advantage of steel plate forging molding, greatly reduces bottom pig mold and muscle ftractures the chance even ruptured, improve security reliability and the service life of pig mold.
It is trapezoidal that the present invention forges pig mold, i.e. forging pig mold is parallel to each other along the lower end in molten iron direction with upper end, forging pig mold is less than the forging pig mold width L2 along the upper end in molten iron direction along the lower end L1 in molten iron direction, forging pig mold width B3 is 270-480mm, width L3 is 760-960mm, forging pig mold with its above and below forging pig mold mutually overlap, pitch A of adjacent pig mold is 250-450mm, overlap joint mouth (Q) lower camber side of top forging pig mold is 3-6mm with lower section forging pig mold afterbody (P) cambered surface overlap joint gap e1, it is 4-8mm that overlap joint mouth (Q) lower plane of top forging pig mold overlaps gap e2 above with lower section forging pig mold afterbody (P).
It is 50-80mm that the present invention forges the internal muscle height h1 of pig mold, and muscle exterior groove height h2 is 30-60mm.Muscle quantity is generally 2,3 or 5, is internally formed 3,4 or 6 little die cavitys at pig mold.1 longitudinal muscle can also be increased, be internally formed less 6,8 or 12 little die cavitys at pig mold.Two pig molds can also be merged and form a big disjunctor pig mold.
The above-mentioned long-life safety reliable for pig machine forges pig mold, the material of described forging pig mold is high-quality low carbon-structural steel steel plate or is high-temperature alloy steel and high-quality low carbon-structural steel clad steel plate, and thickness adds 10-20mm for forging pig mold bottom thickness b1.
The above-mentioned long-life safety reliable for pig machine forges pig mold, and described forging pig mold have employed Special middle frequency heating furnace and the heating coil made according to blanking shape, and heat time heating time is 5-15 minute, and heating-up temperature is 1100-1300 DEG C.
The above-mentioned long-life safety reliable for pig machine forges pig mold, and described forging pig mold have employed supporting edger, and the forging pig mold of molding is processed without subsequent artefacts.
The above-mentioned long-life safety reliable for pig machine forges pig mold, and the process route of described forging pig mold is:
Steel plate materials inspection--> steel plate cutting--> blank heating--> mould forges the cleaning of molding--> finished product trimming--> outward appearance--> product inspection.
Shape and the steel plate thickness of steel plate cutting change along with the change of shape of forging pig mold, directly affect steel utilization ratio, affect the production cost of forging pig mold.The heating-up temperature of blank and heat time heating time are also the critical processes of impact forging pig mold production cost, and affect the workmanship of forging pig mold.
The weight of the product casting pig that the present invention makes is 40-90Kg(disjunctor), after being divided into three pieces, four pieces or six pieces, monomer weight is 6-30Kg.Iron block size determines according to the manufacturing technique requirent of client, and different size, different masses number and difform casting pig (bread ferrum) need different forging molds.
Embodiment 1:
Forging pig mold is by Forging Technology global formation, it is internally provided with two muscles (J1 and J2) at forging pig mold, internal for forging pig mold die cavity is separated into three shaping mold cavities (N1, N2, N3) by muscle, forging pig mold is arranged on pig machine and mutually overlaps, move (F) from bottom to top, forging pig mold is provided with overlap joint mouth (Q) along the lower end in molten iron direction, being provided with two overfalls (K1 and K2) on overlap joint mouth outer, forging pig mold both sides are provided with molten iron and protect edge (M1 and M2) and the ear (T1 and T2) coupled with carrier bar.Forging pig mold bottom thickness b1 is 40mm, outside ramp thickness b2 is 35mm, muscle molding thickness b3 is 35mm, bevel angle C is 55 °, top fillet r1 is 12mm, and overlap joint mouth end thickness b4 is 15mm, and cross section inwall circular arc R 1 is 120mm, outer wall circular arc R 2 is 160mm, and bottom surface, longitudinal section is plane.Forging pig mold is trapezoidal, i.e. L2 is 670mm, L1 is 590mm, forging pig mold width B3 is 350mm, width L3 is 790mm, forging pig mold with its above and below forging pig mold mutually overlap, pitch A of adjacent pig mold is 310mm, overlap joint mouth (Q) lower camber side of top forging pig mold is 5mm with lower section forging pig mold afterbody (P) cambered surface overlap joint gap e1, and it is 7mm that overlap joint mouth (Q) lower plane of top forging pig mold overlaps gap e2 above with lower section forging pig mold afterbody (P).The internal muscle height h1 of forging pig mold is 70mm, and muscle exterior groove height h2 is 50mm.It is 60mm that described forging pig mold both sides molten iron protects along height h3.The weight of the product casting pig that the present invention makes is 45Kg(disjunctor), after being divided into three pieces, monomer weight is 15Kg.
Embodiment 2:
The material of described forging pig mold is high-quality low carbon-structural steel steel plate Q235, thickness is 60mm, forging pig mold have employed Special middle frequency heating furnace and the heating coil made according to blanking shape, heat time heating time is 9 minutes, heating-up temperature is 1200 DEG C, forging pig mold have employed supporting special edger, and the forging pig mold of molding is processed without subsequent artefacts.
Embodiment 3:
Forging pig mold is by Forging Technology global formation, it is internally provided with three muscles at forging pig mold, internal for forging pig mold die cavity is separated into four shaping mold cavities by muscle, forging pig mold is arranged on pig machine and mutually overlaps, move (F) from bottom to top, forging pig mold is provided with overlap joint mouth (Q) along the lower end in molten iron direction, overlap joint is provided with three overfalls on mouth outer, forging pig mold both sides are provided with molten iron and protect edge (M1 and M2) and the ear (T1 and T2) coupled with carrier bar, and coupling bolt hole is 4.Forging pig mold bottom thickness b1 is 45mm, outside ramp thickness b2 is 38mm, muscle molding thickness b3 is 40mm, bevel angle C is 65 °, top fillet r1 is 15mm, and overlap joint mouth end thickness b4 is 20mm, and cross section inwall circular arc R 1 is 130mm, outer wall circular arc R 2 is 175mm, and bottom surface, longitudinal section is cambered surface.Forging pig mold is trapezoidal, i.e. L2 is 830mm, L1 is 720mm, forging pig mold width B3 is 380mm, width L3 is 960mm, forging pig mold with its above and below forging pig mold mutually overlap, pitch A of adjacent pig mold is 330mm, overlap joint mouth (Q) lower camber side of top forging pig mold is 7mm with lower section forging pig mold afterbody (P) cambered surface overlap joint gap e1, and it is 9mm that overlap joint mouth (Q) lower plane of top forging pig mold overlaps gap e2 above with lower section forging pig mold afterbody (P).The internal muscle height h1 of forging pig mold is 90mm, and muscle exterior groove height h2 is 70mm.It is 80mm that described forging pig mold both sides molten iron protects along height h3.The weight of the product casting pig that the present invention makes is 80Kg(disjunctor), after being divided into four pieces, monomer weight is 20Kg.
Embodiment 4:
The clad steel plate that material is high-quality low carbon-structural steel steel plate Q235 and rustless steel 1Cr18Ni9Ti of described forging pig mold, thickness is respectively 60mm and 5mm, forging pig mold have employed Special middle frequency heating furnace and the heating coil made according to blanking shape, heat time heating time is 12 minutes, heating-up temperature is 1300 DEG C, forging pig mold have employed supporting special edger, and the forging pig mold of molding is processed without subsequent artefacts.
The above disclosed presently preferred embodiments of the present invention that is only, the interest field that certainly can not limit the present invention with this, equivalence change or the equivalent therefore made according to scope of the present invention patent substitute or substantially deform, and still belong to protection scope of the present invention.
Claims (6)
- null1. the long-life safety reliable forging pig mold for pig machine，It is characterized in that: forging pig mold is by Forging Technology global formation，At least provided with two muscles less than high temperature liquid iron liquid level inside forging pig mold，Internal for forging pig mold die cavity is separated at least three shaping mold cavity by muscle，Forging pig mold is provided with the overlap joint mouth Q for overlapping mutually with adjacent forging pig mold along the lower end in molten iron direction，Forging pig mold is arranged along the upper end in molten iron direction with adjacent forging pig mold along the lower end overlap joint corresponding pig mold afterbody P of mouth in molten iron direction，At least provided with two overfalls on overlap joint mouth Q，Forging pig mold both sides are provided with molten iron and protect along M1 and M2 and ear T1 and T2 that be connected with carrier bar，Forging pig mold is trapezoidal，Forging pig mold is parallel along the upper end in molten iron direction with forging pig mold along the lower end overlap joint mouth in molten iron direction，And forge the pig mold width L1 along the lower end overlap joint mouth in molten iron direction less than forging the pig mold width L2 along the upper end in molten iron direction；The material of described forging pig mold is high-quality low carbon-structural steel steel plate or is high-temperature alloy steel and high-quality low carbon-structural steel clad steel plate, and thickness adds 10-20mm for forging pig mold bottom thickness b1.
- Long-life safety reliable for pig machine the most according to claim 1 forges pig mold, it is characterized in that: described forging pig mold bottom thickness b1 is 30-45mm, outside ramp thickness b2 is 25-35mm, muscle molding thickness b3 is 25-35mm, and bevel angle C is 50-70 °, and top fillet r1 is 5-15mm, overlap joint mouth end thickness b4 is 10-20mm, cross section inwall circular arc R 1 is 100-130mm, and outer wall circular arc R 2 is 130-175mm, and bottom surface, longitudinal section is plane or arc surface.
- Long-life safety reliable for pig machine the most according to claim 1 forges pig mold, it is characterized in that: described forging pig mold is 270-480mm along distance B3 between the lower end and upper end in molten iron direction, width L3 between two ears is 760-960mm, forging pig mold with its above and below forging pig mold mutually overlap, pitch A of adjacent pig mold is 250-450mm, the overlap joint mouth Q lower camber side of top forging pig mold is 3-6mm with lower section forging pig mold afterbody P cambered surface overlap joint gap e1, the overlap joint mouth Q lower plane of top forging pig mold and lower section are forged and overlapped gap e2 above pig mold afterbody P is 4-8mm.
- Long-life safety reliable for pig machine the most according to claim 1 forges pig mold, it is characterised in that: the internal muscle height h1 of described forging pig mold is 50-80mm, and muscle exterior groove height h2 is 30-60mm.
- Long-life safety reliable for pig machine the most according to claim 1 forges pig mold, it is characterised in that: it is 50-80mm that described forging pig mold both sides molten iron protects along height h3.
- Long-life safety reliable for pig machine the most according to claim 1 forges the manufacture method of pig mold: the process route of described forging pig mold is: steel plate materials inspection--> steel plate cutting--> blank heating--> mould forges the cleaning of molding--> finished product trimming--> outward appearance--> product inspection, described forging pig mold have employed Special middle frequency heating furnace and the heating coil made according to blanking shape, heat time heating time is 5-15 minute, and heating-up temperature is 1100-1300 DEG C.
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| CN105436438B (en) * | 2015-12-04 | 2017-09-26 | 重庆盛镁镁业有限公司 | With the Aluminium ingot mould for tilting spilling runner adjustable weight |
| CN106077534B (en) * | 2016-08-17 | 2018-05-11 | 河南理工大学 | Pig mold, preparation method and its bridging method |
| CN106111908B (en) * | 2016-08-23 | 2018-06-29 | 舟山巨洋技术开发有限公司 | A kind of equipment and application method for preventing molten casting iron overflow everywhere |
| CN110131563A (en) * | 2018-02-08 | 2019-08-16 | 中国科学院金属研究所 | One kind being suitable for the soft core forging of superhigh temperature and makes with Ingot Type design method |
| CN113695535A (en) * | 2021-08-20 | 2021-11-26 | 世林（漯河）冶金设备有限公司 | Iron casting mould with gap interlayer |
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| CN201423431Y (en) * | 2009-05-26 | 2010-03-17 | 漯河市景恒冶金机械有限公司 | Anti-crack energy-saving cast iron mold |
| CN101758173A (en) * | 2009-11-25 | 2010-06-30 | 世林（漯河）冶金设备有限公司 | Pig mold of pig machine |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Pengfei Inventor after: Zhang Jin Inventor after: Wu Linxiang Inventor after: Guo Yu Inventor before: Li Pengfei Inventor before: Feng Li Inventor before: Wu Linxiang Inventor before: Teng Weiqiang |
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| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |