CN109822049A - A kind of casting technique of robot arm pedestal - Google Patents
A kind of casting technique of robot arm pedestal Download PDFInfo
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- CN109822049A CN109822049A CN201910288183.4A CN201910288183A CN109822049A CN 109822049 A CN109822049 A CN 109822049A CN 201910288183 A CN201910288183 A CN 201910288183A CN 109822049 A CN109822049 A CN 109822049A
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- arm pedestal
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Abstract
The invention discloses a kind of casting techniques of robot arm pedestal, include the following steps, a, upper die and lower die for forming sand mold mould are made using furan resin self curing sand, there are multiple cast gates in upper mold, wherein four cast gates correspond to the quadrangle of robot arm pedestal, remaining cast gate corresponds to the bottom plate of robot arm pedestal, obtain A product, b, in the intracavitary insertion chill of the type of lower die, the position of chill corresponds to the quadrangle of robot arm pedestal, obtain B product, c, melting QT450-10 type cast iron, 1520-1540 DEG C of smelting temperature, obtain C product, d, by weight, 1-1.4 parts of graphite are added in every 100 parts of C product, it stirs evenly, obtain D product, e, it is injected in B product after D product are cooled to 1370-1390 DEG C, finished product is cleared up to obtain after cooling.The present invention is used for the casting of robot arm pedestal, has the advantages that casting is not easy to be broken in use, casting qualified rate is higher, casting manufacture efficiency is higher and product yield is high.
Description
Technical field
The invention belongs to robot arm pedestal casting field more particularly to a kind of casting dies of robot arm pedestal
Tool.
Background technique
Robot arm pedestal casting is one of accessory of automatic machinery people on steamer assembling line, is used
QT450-10 type iron casting, 117 kilograms of quality.Under existing casting technique, 1420-1440 DEG C of molten iron is along runner from casting
The bottom pouring of part enters the type chamber of sand mold mould, and sprue gate is located at lower die, and sand mold mould is made of upper die and lower die, upper mold and
Lower die is using siliceous sand bonding forming, and due to casting structure complexity, wall unevenness is even, and most thin at bottom plate, only 8mm is thick,
Four corners are most thick, reach 40mm, and loose, the casting loose tension for leading to casting is easy to shrink unevenly and generated when casting is cooling
Intensity is low, and through examining, the coupon tensile strength of casting reaches 17.4% less than 420MPa, elongation percentage, and casting is easy using
It is produced fracture in journey.It usually requires to be beaten repeatedly with iron hammer after casting depanning, vibration falls the sandstone of cast(ing) surface adherency and knocks off and pours
The runner connected at mouthful solidifies part, and the loose casting that will lead to of casting is easy to be struck wound by iron hammer, and appearance is damaged, does not meet buying side
Procurement criteria, casting can not sell, and be equivalent to rejected product, and the qualification rate of casting is lower, only 87.5%.Casting is held
Non-uniform problem is easily shunk, is that cast(ing) surface can generate recess caused by shrinking unevenly, existing casting technique is to hold
The place for being also easy to produce recess is compensated using riser, is again cut off the redundance at riser after casting, is not only reduced
The manufacture efficiency of casting, and cut off riser to will lead to product yield low (only 62%), increase production cost.Therefore, existing
Have casting technique for robot arm pedestal cast, there are casting be easy in use fracture, casting qualified rate it is lower,
The lower defect low with product yield of casting manufacture efficiency.
Summary of the invention
The object of the present invention is to provide a kind of casting techniques of robot arm pedestal.The present invention is used for robot
The casting of arm pedestal, have that casting is not easy to be broken in use, casting qualified rate is higher, casting manufacture efficiency is higher and
The high advantage of product yield.
Technical solution of the present invention: a kind of casting technique of robot arm pedestal includes the following steps,
A, the upper die and lower die for forming sand mold mould are made using furan resin self curing sand, there is multiple pour in upper mold
Mouthful, wherein four cast gates correspond to the quadrangle of robot arm pedestal, remaining cast gate corresponds to the bottom plate of robot arm pedestal,
A product are obtained,
B, in the intracavitary insertion chill of the type of lower die, the position of chill corresponds to the quadrangle of robot arm pedestal, obtains B product,
C, melting QT450-10 type cast iron, obtains C product by 1520-1540 DEG C of smelting temperature,
D, 1-1.4 parts of graphite by weight, are added in every 100 parts of C product, are stirred evenly, are obtained D product,
E, it is injected in B product after D product being cooled to 1370-1390 DEG C, clears up to obtain finished product after cooling.
In the casting technique of robot arm pedestal above-mentioned, in the step b, the wall thickness of chill is more than 3cm.
In the casting technique of robot arm pedestal above-mentioned, in the step c, 1530 DEG C of the smelting temperature.
It is after D product are cooled to 1380 DEG C in the step e in the casting technique of robot arm pedestal above-mentioned
It injects in B product, clears up to obtain finished product after cooling.
In the casting technique of robot arm pedestal above-mentioned, the interior of the sand mold mould is equipped with sprue, and sprue is logical
It crosses five vertical runners and is separately connected the quadrangle of robot arm pedestal and the bottom plate of robot arm pedestal.
It is to add 1- in every 100 parts of C product in the step d in the casting technique of robot arm pedestal above-mentioned
1.4 parts of graphite and 0.5-0.7 parts of inovulant, stir evenly, and obtain D product.
It in the step d, is added in every 100 parts of C product in the casting technique of robot arm pedestal above-mentioned
1.2 parts of graphite and 0.6 part of inovulant, stir evenly, and obtain D product.
Compared with prior art, the present invention, which has first done the molten iron of casting, improves and (improves one)；Again to sand mold mould
Material, which has been done, to be improved and (improves two), and sand mold mould is made of furan resin self curing sand, the sand mold of furan resin self curing sand production
Mold rigidity is big and good permeability；Then improvement has been done to the position of cast gate and has placed chill (improve three) type is intracavitary；Most
Pouring temperature has been done afterwards and has improved and (improves four).
It, will with molten iron temperature decline casting since molten iron pours into sand mold mould for the casting of nodular cast iron material
Contraction, referred to as liquid contraction are generated, austenite can be generated in molten steel solidification, can also generate solidification shrinkage；In liquid contraction
With solidification shrinkage Shi Douhui indigenous graphite ball, since the density of graphite only has the one third or so of austenite, casting will be produced
Raw volume expansion (abbreviation graphitization expansion).So if liquid cool down when volume shrinkage mass and solidification when volume contraction
The sum of amount is less than the volume incrementss of graphitization expansion, and the head-free casting production of casting can be realized, improve one in QT450-
It is added to graphite in 10 type cast irons, under the premise of graphite floatation will not occur for molten iron, improves phosphorus content as far as possible, and add
Add inovulant, guarantee that the carbon in molten iron is sufficiently graphitized, guarantees that molten iron has biggish volume incrementss while cooling, by changing
The place for into one casting easily being shunk does not need riser compensation, and one-pass molding after cast casting does not need post-processing excision and emits
Mouthful, that is, the manufacture efficiency of casting is improved, the product yield (reaching 85%) of casting is also improved, reduces the production of casting
Cost.
Improving two ensure that sand mold mould will not answer the graphitization expansion of casting and deform, and the size of casting is accurate, improve
Product qualification rate；During molten iron is cooling, since cast gate is place most narrow in runner, the molten iron at cast gate takes the lead in sending out
Raw solidification, the inner cavity of sand mold mould is closed, and under the action of graphitization expansion, the intracavitary air of type is arranged directly through sand mold mould
Out, and casting inner air vent is compacted by certain pressure that casting expansion generates, cast-internal consolidation does not have loose, improves casting
The tensile strength of part, through examining, up to 500MPa, elongation percentage down to 13.2%, casting is not easy the coupon tensile strength of casting
It is broken in use, casting is also not easy to be struck wound by iron hammer, the presentation quality of increase rate casting.
It improves threeway and crosses the cooling velocity that chill accelerates casting thickness, the rapid cooled and solidified of casting outer layer, at cast gate
Molten iron takes the lead in completing a part of contraction before solidifying not yet, forms volume vacancy, obtains supplement molten iron from runner in time, improves
Feeding effect, cast(ing) surface will not generate systolic depression, improve the visual quality of casting.
It improves four and pouring temperature is reduced to 1380 DEG C from 1420-1440 DEG C, reduce the volume change after molten iron solidifies
Amount, reduces shrinkage, ensure that cast(ing) surface will not generate systolic depression, improves the visual quality of casting, improves two, three and four
The common guarantee visual quality of casting is good, meets the procurement criteria of buying side, that is, improves product qualification rate, and product qualification rate is reachable
98.4%.
Therefore, the present invention is used for the casting of robot arm pedestal, and there is casting to be not easy to be broken in use, cast
The advantage that part qualification rate is higher, casting manufacture efficiency is higher and product yield is high.
Detailed description of the invention
Schematic diagram when Fig. 1 is present invention casting.
Schematic diagram when Fig. 2 is the casting of existing casting technique.
The label in accompanying drawing is: 1- cast gate, 2- runner, the bottom plate of 3- robot arm pedestal, 4- robot arm bottom
The quadrangle of seat.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples, but be not intended as to the present invention limit according to
According to.
Embodiment 1 (most preferred embodiment).A kind of casting technique of robot arm pedestal, as shown in Figure 1, including following step
Suddenly,
A, the upper die and lower die for forming sand mold mould are made using furan resin self curing sand, there are eight in upper mold and pour
Mouthful, wherein four cast gates correspond to the quadrangle 4 of robot arm pedestal, remaining cast gate corresponds to the bottom plate of robot arm pedestal
3, four cast gates of the bottom plate 3 corresponding to robot arm pedestal are uniformly distributed around the axis of robot arm pedestal, obtain A product,
B, in the intracavitary insertion chill of the type of lower die, the position of chill corresponds to the quadrangle of robot arm pedestal, obtains B product,
C, using 2T medium-frequency induction furnace melting QT450-10 type cast iron, 1530 DEG C of smelting temperature, C product are obtained,
D, 1.2 parts of graphite and 0.6 part of inovulant by weight, are added in every 100 parts of C product, are stirred evenly, are obtained D
Product,
E, it is injected in B product after D product being cooled to 1380 DEG C, clears up to obtain finished product after cooling.
In the step b, the wall thickness 4cm of chill.
The interior of the sand mold mould is equipped with sprue, and sprue is separately connected robot by five vertical runners 2
The quadrangle 4 of arm pedestal and the bottom plate 3 of robot arm pedestal, the cast gate 1 are set to the lower end of runner 2.
It is to enter runner 2 from sprue when molten iron casting, by the type chamber for entering sand mold mould after cast gate 1.It is anti-
Only graphitization expansion jacks up upper mold, can apply certain counterweight in upper mold.
Embodiment 2.A kind of casting technique of robot arm pedestal, includes the following steps,
A, the upper die and lower die for forming sand mold mould are made using furan resin self curing sand, there are five pour tool in upper mold
Mouthful, wherein four cast gates correspond to the quadrangle 4 of robot arm pedestal, remaining cast gate corresponds to the bottom plate of robot arm pedestal
3, A product are obtained,
B, in the intracavitary insertion chill of the type of lower die, the position of chill corresponds to the quadrangle of robot arm pedestal, obtains B product,
C, using 2T medium-frequency induction furnace melting QT450-10 type cast iron, 1520 DEG C of smelting temperature, C product are obtained,
D, 1 part of graphite and 0.5 part of inovulant by weight, are added in every 100 parts of C product, are stirred evenly, are obtained D product,
E, it is injected in B product after D product being cooled to 1370 DEG C, clears up to obtain finished product after cooling.
In the step b, the wall thickness 3.5cm of chill.
The interior of the sand mold mould is equipped with sprue, and sprue is separately connected robot by five vertical runners 2
The quadrangle 4 of arm pedestal and the bottom plate 3 of robot arm pedestal, the cast gate 1 are set to the lower end of runner 2.
Embodiment 3.A kind of casting technique of robot arm pedestal, includes the following steps,
A, the upper die and lower die for forming sand mold mould are made using furan resin self curing sand, there are five pour tool in upper mold
Mouthful, wherein four cast gates correspond to the quadrangle 4 of robot arm pedestal, remaining cast gate corresponds to the bottom plate of robot arm pedestal
3, A product are obtained,
B, in the intracavitary insertion chill of the type of lower die, the position of chill corresponds to the quadrangle 4 of robot arm pedestal, obtains B product,
C, using 2T medium-frequency induction furnace melting QT450-10 type cast iron, 1540 DEG C of smelting temperature, C product are obtained,
D, 1.4 parts of graphite and 0.7 part of inovulant by weight, are added in every 100 parts of C product, are stirred evenly, are obtained D
Product,
E, it is injected in B product after D product being cooled to 1390 DEG C, clears up to obtain finished product after cooling.
In the step b, the wall thickness 5cm of chill.
The interior of the sand mold mould is equipped with sprue, and sprue is separately connected robot by five vertical runners 2
The quadrangle 4 of arm pedestal and the bottom plate 3 of robot arm pedestal, the cast gate 1 are set to the lower end of runner 2.
Casting obtained by casting obtained by three above embodiment and existing casting technique is detected, detection knot as follows is obtained
Fruit:
The present invention is the special process used to specific shape and specific materials casting, and the present invention is used for robot arm bottom
The casting of seat, has that casting is not easy to be broken in use, casting qualified rate is higher, casting manufacture efficiency is higher and technique
The high advantage of yield rate.
Claims (7)
1. a kind of casting technique of robot arm pedestal, it is characterised in that: include the following steps,
A, the upper die and lower die for forming sand mold mould are made using furan resin self curing sand, there are multiple cast gates in upper mold,
Wherein four cast gates correspond to the quadrangle of robot arm pedestal, remaining cast gate corresponds to the bottom plate of robot arm pedestal, obtains A
Product,
B, in the intracavitary insertion chill of the type of lower die, the position of chill corresponds to the quadrangle of robot arm pedestal, obtains B product,
C, melting QT450-10 type cast iron, obtains C product by 1520-1540 DEG C of smelting temperature,
D, 1-1.4 parts of graphite by weight, are added in every 100 parts of C product, are stirred evenly, are obtained D product,
E, it is injected in B product after D product being cooled to 1370-1390 DEG C, clears up to obtain finished product after cooling.
2. the casting technique of robot arm pedestal according to claim 1, it is characterised in that: in the step b, chill
Wall thickness be more than 3cm.
3. the casting technique of robot arm pedestal according to claim 1, it is characterised in that: described in the step c
1530 DEG C of smelting temperature.
4. the casting technique of robot arm pedestal according to claim 1, it is characterised in that: in the step e, be
It is injected in B product after D product are cooled to 1380 DEG C, clears up to obtain finished product after cooling.
5. the casting technique of robot arm pedestal according to claim 1, it is characterised in that: the sand mold mould it is interior
Equipped with sprue, sprue is separately connected quadrangle and the robot of robot arm pedestal by five vertical runners
The bottom plate of arm pedestal.
6. the casting technique of robot arm pedestal according to claim 1, it is characterised in that: in the step d, be
1-1.4 parts of graphite and 0.5-0.7 parts of inovulant are added in every 100 parts of C product, are stirred evenly, are obtained D product.
7. the casting technique of robot arm pedestal according to claim 6, it is characterised in that: in the step d, be
1.2 parts of graphite and 0.6 part of inovulant are added in every 100 parts of C product, are stirred evenly, are obtained D product.
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| 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 |
| CN102168224A (en) * | 2011-05-26 | 2011-08-31 | 上海东新冶金技术工程有限公司 | Sizing press module |
| CN103215488A (en) * | 2013-04-26 | 2013-07-24 | 四川省宜宾普什铸造有限公司 | Method for integrally casting large-sized V-shaped diesel engine body by utilizing nodular cast iron |
| CN106424572A (en) * | 2016-11-06 | 2017-02-22 | 薛献来 | Low-temperature ferrite ductile cast iron auxiliary casting test block preparation method |
| CN107716901A (en) * | 2017-08-23 | 2018-02-23 | 宁波市恒源铸造有限公司 | Wearable ductile iron composite roll and its casting method |
| CN107723581A (en) * | 2017-08-23 | 2018-02-23 | 宁波市恒源铸造有限公司 | Corrosion resistant ductile iron and its casting method |
-
2019
- 2019-04-11 CN CN201910288183.4A patent/CN109822049A/en active Pending
Patent Citations (6)
| 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 |
| CN102168224A (en) * | 2011-05-26 | 2011-08-31 | 上海东新冶金技术工程有限公司 | Sizing press module |
| CN103215488A (en) * | 2013-04-26 | 2013-07-24 | 四川省宜宾普什铸造有限公司 | Method for integrally casting large-sized V-shaped diesel engine body by utilizing nodular cast iron |
| CN106424572A (en) * | 2016-11-06 | 2017-02-22 | 薛献来 | Low-temperature ferrite ductile cast iron auxiliary casting test block preparation method |
| CN107716901A (en) * | 2017-08-23 | 2018-02-23 | 宁波市恒源铸造有限公司 | Wearable ductile iron composite roll and its casting method |
| CN107723581A (en) * | 2017-08-23 | 2018-02-23 | 宁波市恒源铸造有限公司 | Corrosion resistant ductile iron and its casting method |
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