Cast the wear-resistant husk rice delivery head that does not breed the spoken parts in traditional operas magnesium iron
Technical field
The present invention relates to a kind of casting cast iron products, especially cast the wear-resistant husk rice delivery head that does not breed the spoken parts in traditional operas magnesium iron.
Background technology
The husk rice delivery head is because of the bad part of changing often that weares and teares in the rice mill.At present the circle with steel matter that has of production husk rice delivery head puts the welding helical blade, more than blanking, processing, shaping, the welding sequence and complex process, and also of poor quality, cause husk rice to yield poorly; What have casts the husk rice delivery head with grey cast-iron, and it is bad often to wear and tear, and is to cause the one of the main reasons of cracking rice in the rice milling process.
Summary of the invention
The present invention supplies a kind of wear-resistant husk rice delivery head that does not breed the spoken parts in traditional operas magnesium iron of casting, and uses and does not breed the wear-resistant character of spoken parts in traditional operas magnesium iron, improves the service life of husk rice delivery head, has improved the husk rice quality.
The technical solution adopted for the present invention to solve the technical problems is: comprise exhaust rising head, last greensand mold, husk rice delivery head die cavity, the husk rice delivery head apperance first half, husk rice delivery head apperance alignment pin, endoporus core, husk rice delivery head apperance Lower Half, following greensand mold, clay-bonded sand greensand mold system sand, drag box, moulding board, driving keyway, ingate, husk rice delivery head circle cover, the trapezoidal conveying blade of spiral, sprue, cope, case outside fix pin composition.Husk rice delivery head apperance Lower Half is located at down on the greensand mold; Last greensand mold is provided with husk rice delivery head apperance first half die cavity, ingate die cavity, sprue die cavity and exhaust rising head die cavity; Husk rice delivery head circle overlaps endoporus and is provided with the endoporus core, and husk rice delivery head circle cover cylindrical is provided with the trapezoidal conveying blade of spiral, and husk rice delivery head circle cover two ends are provided with the relative driving keyway in each two position, and last greensand mold and following greensand mold are with case outside fix finger setting mould assembly; With the single sand shop sand molding of clay-bonded sand greensand mold; The cupola melting furnace charge, rare earth magnesium ferrosilicon alloy nodulizer nodularization molten iron; Casting the wear-resistant spoken parts in traditional operas molten ductile iron that do not breed advances people's sprue, is full of husk rice delivery head die cavity after advancing people's ingate.
Clay-bonded sand wet type system sand is that casting is used the silica sand granularity to wet as 20-40 order clay-bonded sand to think system sand.
30 millimeters high 25 millimeters upper bases of the single head helical pitch of the trapezoidal conveying blade of spiral are gone to the bottom 16 millimeters for 8 millimeters.
Cast the wear-resistant husk rice delivery head chemical composition that does not breed the spoken parts in traditional operas magnesium iron: C:3.5-3.9%; Si:2.4-2.7%; Mn :≤0.6
≤0.07%; S :≤0.03%RE:0.02-0.04, Mg:0.03-0.06%.
Casting wear-resistant husk rice delivery head metallographic structure of not breeding the spoken parts in traditional operas magnesium iron is: cementite+pearlite.
The invention has the beneficial effects as follows, cast the wear-resistant husk rice delivery head that does not breed the spoken parts in traditional operas magnesium iron and improve 10 times, improve 3 times of service lifes, improved the husk rice quality than the husk rice delivery head of grey cast-iron than the husk rice delivery head production efficiency of steel welding.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Accompanying drawing is the wear-resistant structure chart that does not breed the husk rice delivery head of spoken parts in traditional operas magnesium iron of casting.
Fig. 1 is the B-B cutaway view of Fig. 2.
Fig. 2 is the A-A cutaway view of Fig. 1.
Among the figure 1, the exhaust rising head, 2, go up greensand mold, 3 husk rice delivery head die cavities, 4, the husk rice delivery head apperance first half, 5, husk rice delivery head apperance alignment pin; 6, endoporus core, 7, husk rice delivery head apperance Lower Half, 8, following greensand mold, 9, clay-bonded sand greensand mold system sand, 10, drag box; 11, moulding board, 12, drive keyway, 13, ingate, 14 husk rice delivery heads circle cover; 15, the trapezoidal conveying blade of spiral, 16, sprue, 17, cope, 18 casees outside fix pins.
The specific embodiment
Accompanying drawing is the wear-resistant structure chart of not educating the husk rice delivery head of spoken parts in traditional operas magnesium iron of the casting of jet-air rice polisher NF-14 type.In Fig. 1,2, on moulding board 11, put husk rice delivery head apperance Lower Half 7 well and put drag box 10 again, make down greensand mold 8 with clay-bonded sand wet type system sand 9 spring sand; The following greensand mold of making from moulding board 11 upset 8; On husk rice helical feed head mould appearance Lower Half 7, put the husk rice delivery head apperance first half 4 well with two alignment pins of husk rice delivery head apperance, 5 location; Be placed on cope 16 on the drag box 10 and spread layering sand with two case outside fix pins 18 location; Be placed on sprue 16 apperances, ingate 13 apperances and exhaust rising head 1 apperance on the relevant position, make greensand mold 2 with clay-bonded sand wet type system sand 9 spring sand; Extract sprue 16 apperances and exhaust rising head 1 apperance; Open wide and go up greensand mold 2; Trip out the apperance of the husk rice delivery head apperance Lower Half 7 and the husk rice delivery head first half 4 along hand of spiral spiral; Trip out ingate 13 apperances; Respectively there are relative driving keyway 12 cores in two each 10 millimeters positions of long 20 mm wides and the endoporus core 6 of 62 millimeters cores of husk rice delivery head circle cover 14 endoporus Φ in the good up and down husk rice delivery head of the core print seat of following greensand mold 8 circle cover 14 two ends, locate last greensand mold 2 with two case outside fix pins 18 and are combined in down on the greensand mold 8, are placed on the type of getting togather and pour into a mould the place; Husk rice delivery head circle cover 14 cylindrical length are provided with go to the bottom 16 millimeters the trapezoidal conveying blade 15 of twin-feed spiral of 8 millimeters of 30 millimeters high 25 millimeters upper bases of single head helical pitch; Charge composition is: No. 22 foundry pig irons 70%, foundry returns 20%, steel scrap 10%; With 3t cupola melting furnace charge; Be sidelong 8 kilograms of Mg8RE7 Antaciron nodulizers on retaining dam one, nodularization bag bottom, on nodulizer, cover the ferro-silicon alloy powder of 1.6 kilograms of 75%Si, cover an amount of plant ash and compacting; In the casting ladle of dress nodulizer, pour 400 kilograms 1420 ± 20 ℃ molten iron; Treat that nodularization finishes to stir and skim, do not breed, pour 200 kilograms of molten iron again; Cast during 1360 ± 20 ℃ of nodularization molten iron, the nodularization molten iron gets into and is full of husk rice delivery head die cavity 3 after sprue 16 advances people's ingate 13.
Clay-bonded sand wet type system sand is that casting uses the silica sand granularity to be 20-40 order clay-bonded sand wet type system sand.
30 millimeters high 25 millimeters upper bases of the single head helical pitch of the trapezoidal conveying blade of spiral are gone to the bottom 16 millimeters for 8 millimeters.
Cast the wear-resistant husk rice delivery head chemical composition that does not breed the spoken parts in traditional operas magnesium iron: C:3.5-3.9%, Si:2.4-2.7%, Mn :≤0.6%, P :≤0.07%, S :≤0.03%, RE:0.02-0.04%, Mg:0.03-0.06%.
Casting wear-resistant husk rice delivery head metallographic structure of not breeding the spoken parts in traditional operas magnesium iron is: cementite+pearlite.