CN104308083B - The metal mold and its compression casting method of gear box cover - Google Patents
The metal mold and its compression casting method of gear box cover Download PDFInfo
- Publication number
- CN104308083B CN104308083B CN201410524709.1A CN201410524709A CN104308083B CN 104308083 B CN104308083 B CN 104308083B CN 201410524709 A CN201410524709 A CN 201410524709A CN 104308083 B CN104308083 B CN 104308083B
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- Prior art keywords
- gear box
- box cover
- punch
- pin
- hole
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- 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
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/11—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of mechanical pressing devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The compression casting method of gear box cover the invention discloses a kind of metal mold of gear box cover and using the metal mold, casting mold does not set running channel and riser, molten metal directly pours into lower impressions, and outside under stressed squeezing action, full of entire cavity and compression solidification forming；By opening up, workpiece all in mo(u)ld bottom half, top surface is ropy caused by efficiently solving the problems, such as existing sand casting split shed downwards；Method includes cast, squeezes and fill type, pressurization feeding and open form pickup；The advantage of the invention is that：Product quality is high, and stock utilization is high, applied widely, at low cost.
Description
Technical field
The present invention relates to a kind of metal mold of gear box cover and its compression casting method, specifically a kind of reduction box
The compression casting method of the gear box cover of the metal mold and use of the lid metal mold, the spheroidal graphite cast-iron for various specifications subtract
The permanent mold casting of fast case lid shapes, and belongs to gear box cover casting field.
Background technology
Gear box cover is a kind of typical box parts, it is desirable that has certain mechanical property.Although different size subtracts
Fast case lid has many differences in structure size, but its basic structure is similar.Gear box cover ontology is typically all to carry to add
The rectangle case of strengthening tendons, thickness of the shell are differed in 10-30mm ranges, and top surface is inclined-plane or plane, and center line is equipped with lifting and uses
Vertical gusset, gusset be equipped with hole for hoist, be generally also additionally provided with equipped with peep-hole and rise a lid screw hole；Two sides have
Two semicircle bearing saddle bores are used for installing the bearing for outputting and inputting axis；Its bottom surface is the horizontal mounting surface widened, mounting surface
Be equipped with multiple vertical bolt holes prevents oil leak to use bolt and deceleration block fit sealing；Inside gear box cover
It is the cuboid cavity that a top surface is inclined-plane, for installing transmission gear.
In the prior art, the material of gear box cover can be mainly spheroidal graphite cast-iron and grey cast-iron, using casting side
Necessary removal processing is carried out after method forming.Its casting method be sand casting, including clay-bonded sand casting, resin sand casting
With evaporative pattern sand casting etc..They are all to form its shape using sand mold, and various holes thereon are formed using sand core.This side
Method is flexible and convenient, but there are following Railway Projects：(1) because of the influence of the draft shake allowance of sand casting etc., allowance compared with
Greatly, generally in 5-10mm ranges, stock utilization is relatively low, causes larger waste of material；(2) in the handing-over of reinforcing rib and ontology
The thermal centers positions such as position, upright arm and horizontal wall intersection are susceptible to shrinkage porosite or crackle, form waste product；(3) it is to prevent from shrinking
Defect needs to carry out feeding using the about riser of gear box cover weight 20-30%, and this riser also needs to after solidification
It removes, this just further reduced stock utilization.Moreover, removal process is careless slightly, also will produce misrun defect, causes
Rejection rate increases；(4) for ease of running channel is arranged, it is generally used downward opening cast form position, leads to its top surface in this way
Often there is the defects of dross, stomata, poor surface smoothness.In short, prior art preparation gear box cover generally existing material profit
With rate low (only 70% or so), high rejection rate (generally 2-5%), internal matter defect is more the problems such as.
Invention content
To solve the above-mentioned problems, the present invention devises a kind of metal mold and its compression casting method of gear box cover,
By opening up, workpiece all in mo(u)ld bottom half, top surface caused by efficiently solving existing sand casting split shed downwards
Ropy problem makes the allowance of sand casting gear box cover greatly reduce, and avoids sand holes, shrinkage porosite and crackle etc. and lacks
It falls into, improves stock utilization.
The technical scheme is that：
A kind of metal mold of gear box cover, the casting mold include mo(u)ld top half, mo(u)ld bottom half two parts；The mo(u)ld bottom half is by mo(u)ld bottom half ontology
It is formed with cavity plate, the female die embedding is arranged in the mo(u)ld bottom half ontology, and the inner cavity of the cavity plate is by directed cavity and two, workpiece chamber
Be grouped as, to make its casting mold integral finish upward, workpiece all in the mo(u)ld bottom half, efficiently solves in existing sand casting
The ropy problem of top surface caused by Open Side Down；The cavity plate is equipped with the first hole core and the second hole core, the Kong Xin
Position including the first hole core and the second hole core is consistent with the position in gear box cover hole to be formed；The shape of the workpiece chamber
It is consistent with size with size and the shape of gear box cover, for forming the shape of reduction box；
The mo(u)ld top half is made of mo(u)ld top half ontology and punch-pin, and the punch-pin is made of three sections of construction section, guide section and figuration section；
The construction section is used for being installed in mo(u)ld top half ontology；The guide section is adapted with the directed cavity shape, it is ensured that smoothly movement,
And prevent gear box cover molten metal excessive, it is provided with size and position on the lower plane of the guide section and is mutually fitted with first hole core
The the first core pilot hole answered；The punch-pin is equipped with the second hole core pilot hole, and the second hole core pilot hole runs through the installation
Section, guide section and figuration section；The figuration section is located at the bottom of the punch-pin, shape and ruler coaxial with the workpiece chamber
The very little cavity shape with gear box cover is adapted, for forming the inner cavity of gear box cover；
The shape of the directed cavity and the guide section shape of the punch-pin are adapted, and fit clearance between the two is preferably
0.1-0.15mm, it is ensured that smoothly movement；Various Kong Xin include that the first hole core and the second hole core are installed on the cavity plate, described
The position of Kong Xin is consistent with the position in hole to be formed.
Further, the Kong Xin is preferably dimensioned to be the size 2-4mm less than hole to be formed.
Further, the punch-pin is stretched into when the length of the Kong Xin is preferably punch-pin minimum end in contact reduction box molten metal
2-10mm in corresponding hole.
Further, mathematically the likelihood ratio is preferably the figuration section with the workpiece chamber
Further, the workpiece chamber size of the cavity plate is preferably big 1-3mm than gear box cover correspondingly-sized, as deceleration
The allowance of case lid.
A kind of compression casting method of gear box cover using above-mentioned metal mold, includes the following steps：
(1) it pours into a mould：The mo(u)ld top half for the metal mold for being coated with diatomite paint and mo(u)ld bottom half are separated to spacing 500-1000mm, will be subtracted
Fast case lid molten metal was poured into female bottom within 1-3 seconds time, poured the 1.01-1.04 that fluence is gear box cover blank weight
Times；
(2) it squeezes and fills type：Mo(u)ld top half drives the rapid downlink of punch-pin, and the guide section of punch-pin is made to enter the interior simultaneously edge of directed cavity of cavity plate
Guide section continues traveling downwardly, and the second hole core stretches into its corresponding second hole core pilot hole, after punch-pin figuration section contacting metal liquid, squeezes
Molten metal makes molten metal gradually be full of entire workpiece chamber；
(3) pressurization feeding：With the cooled and solidified of molten metal, mo(u)ld top half drives punch-pin to continue traveling downwardly, and increases pressure to 20-
50MPa carries out rheology feeding, until gear box cover is completely solidified into shape；
(4) open form pickup：After gear box cover solidifies completely in 0-2 seconds time, makes mo(u)ld top half release and drive on punch-pin
Row, when Top Runby isGear box cover is ejected into cavity plate and is detached with hole core, on
Type continues uplink until can take out gear box cover between mo(u)ld top half and mo(u)ld bottom half, obtains the gear box cover product of the present invention.
Further, the step (1) cast before, the corresponding punch-pin outer surface in gear box cover machining position,
Hole core outer surface and the diatomite paint of the brushing of cavity plate inner surface or coating thickness 0.5-1mm and drying, to improve gear box cover
Machinability, weight percent the diatomite 90-96%, waterglass 4-10% of the coating.
The present invention does not set running channel and riser, and molten metal directly pours into lower impressions, and outside under stressed squeezing action,
Full of entire cavity and compression solidification forming；Relative to the gravity feeding effect of riser in conventional cast, by upper mold to reduction box
The persistent pressure feeding of lid metal replaces, up to all solidifications, not only having realized the densification of workpiece, but also eliminate cast gate and riser,
Product yield is set to increase substantially.
All in mo(u)ld bottom half, it is downward to efficiently solve existing sand casting split shed by opening up, workpiece by the present invention
The caused ropy problem of top surface.
The advantage of the invention is that：
1, product quality is high：Using gear box cover produced by the invention, interior tissue is fine and closely woven, flawless, sand holes and shrinkage porosite
Defect；
2, stock utilization is high：Compared with sand casting, present invention eliminates riser and running channel, are mended using mechanical pressure
Contracting, stock utilization can reach 96-99%；
3, applied widely：Present invention process window is wide, to the adaptable of technological parameter and material, can produce various
Gear box cover；
4, at low cost：Present invention eliminates moulding, sand removal, the processes such as riser are gone, technological process is short, pollutes small, rejection rate
It is low, so production cost reduces by 10% or more than sand casting.
The invention will be further described with implementation below in conjunction with the accompanying drawings.
Description of the drawings
Fig. 1 is the casting mold structure schematic diagram of the embodiment of the present invention.
Specific implementation mode
Hereinafter, preferred embodiments of the present invention will be described, it should be understood that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
As shown in Figure 1, a kind of metal mold for gear box cover, the casting mold includes mo(u)ld top half, mo(u)ld bottom half two parts；It is described
Mo(u)ld bottom half is made of mo(u)ld bottom half ontology and cavity plate 5, and the edge of the cavity plate 5 is arranged in the mo(u)ld bottom half ontology, and the inner cavity of the cavity plate 5 is by leading
Formed to chamber 8 and 9 two parts of workpiece chamber, to make its casting mold integral finish upward, workpiece all in the mo(u)ld bottom half, effective solution
The ropy problem of top surface caused by existing sand casting split shed determined downwards；The cavity plate 5 is equipped with 4 He of the first hole core
Second hole core 6, the position of the position and gear box cover hole to be formed of the Kong Xin (including the first hole core 4 and second hole core 6)
It sets consistent；The shape and size and the shape of gear box cover of the workpiece chamber 9 are consistent with size, for forming the outer of reduction box
Shape；
The mo(u)ld top half is made of mo(u)ld top half ontology 1 and punch-pin 2, and the punch-pin 2 is successively by construction section 21, guide section 22 and figuration
23 3 sections of compositions of section；The construction section 21 is used for being installed in mo(u)ld top half ontology 1；The guide section 22 and 8 shape of the directed cavity
It is adapted, it is ensured that smoothly movement, and prevent gear box cover molten metal 7 excessive, it is provided with size on the lower plane of the guide section 22
The first core pilot hole being adapted with position and first hole core 4；The punch-pin 2 is equipped with the second hole core pilot hole 3, and described the
Two hole core pilot holes 3 run through the construction section 21, guide section 22 and figuration section 23；The figuration section 23 is located at the punch-pin 2
Bottom, coaxial with the workpiece chamber 9, shape and the cavity shape of size and gear box cover are adapted, and are subtracted for being formed
The inner cavity of fast case lid, mathematically the likelihood ratio is preferably the figuration section 23 with the workpiece chamber 9
The shape of the directed cavity 8 and 22 shape of guide section of the punch-pin 2 are adapted, and fit clearance between the two is
0.1-0.15mm, it is ensured that smoothly movement；Various Kong Xin include that the first hole core 4 and the second hole core 6 are installed on the cavity plate 5,
The position consistency of the position of the Kong Xin and hole to be formed, the Kong Xin are preferably dimensioned to be the size less than hole to be formed
The length of 2-4mm, the Kong Xin stretch into 2 corresponding hole of the punch-pin when being preferably 2 minimum end in contact reduction box molten metal 7 of punch-pin
Interior 2-10mm.The 9 size ratio gear box cover correspondingly-sized of workpiece chamber of the cavity plate 5 is preferably big 1-3mm, as gear box cover
Allowance.
A kind of compression casting method of gear box cover using above-mentioned metal mold, includes the following steps：
(1) it pours into a mould：Punch-pin 2 is detached with cavity plate 5, and spacing is in the range of 500-1000mm, by the molten metal 7 of melting qualification
It was poured into 5 bottom of cavity plate within 1-3 seconds time, pours the 1.01-1.04% that fluence is gear box cover blank weight；
(2) it squeezes and fills type：Mo(u)ld top half 1 drives 2 rapid downlink of punch-pin, and the guide section 22 of punch-pin is made to enter the directed cavity 8 of cavity plate 5
It is interior, it continues traveling downwardly, the second hole core 6 stretches into its corresponding second hole core pilot hole 3, and punch-pin figuration section 23 contacts gear box cover metal
After liquid 7, the inner cavity that gear box cover molten metal is full of entire cavity plate 5 is squeezed；
(3) pressurization feeding：With the cooled and solidified of gear box cover molten metal 7, mo(u)ld top half 1 drives punch-pin 2 to continue traveling downwardly, and increases
Pressure carries out rheology feeding to 20-50MPa, until gear box cover molten metal is completely solidified into shape；
(4) open form pickup：After gear box cover solidifies completely in 0-2 seconds time, makes 1 release of mo(u)ld top half and drive punch-pin 2
Uplink, when Top Runby is By gear box cover eject cavity plate 5 and with the first hole
Core 4 and the separation of the second hole core 6, mo(u)ld top half 1 continue uplink until can take out gear box cover between punch-pin 2 and cavity plate 5, obtain this hair
Bright gear box cover product.
Before the step (1) cast, in the corresponding punch-pin outer surface in gear box cover machining position, hole core outer surface
And the diatomite paint of the brushing of cavity plate inner surface or coating thickness 0.5-1mm and drying, to improve gear box cover machinability
Can, weight percent the diatomite 90-96%, waterglass 4-10% of the coating.
Embodiment 1
The present invention is used for the metal mold compression casting method of DCY160-800 gear box covers, material HT150.
A kind of metal mold of gear box cover, the casting mold include mo(u)ld top half, mo(u)ld bottom half two parts；The mo(u)ld bottom half is by mo(u)ld bottom half ontology
It is formed with cavity plate 5, the edge of the cavity plate 5 is arranged in the mo(u)ld bottom half ontology, and the inner cavity of the cavity plate 5 is by directed cavity 8 and workpiece chamber 9
Two parts form, to make its casting mold integral finish upward, workpiece all in the mo(u)ld bottom half, efficiently solve existing sand mold and cast
The ropy problem of top surface caused by making split shed downwards；The cavity plate 5 is equipped with the first hole core 4 and the second hole core 6, described
Kong Xin (including the first hole core 4 and second hole core 6) position it is consistent with the position in gear box cover hole to be formed；The work
The shape and size and the shape of gear box cover of part chamber 9 are consistent with size, for forming the shape of reduction box；
The mo(u)ld top half is made of mo(u)ld top half ontology 1 and punch-pin 2, and the punch-pin 2 is successively by construction section 21, guide section 22 and figuration
23 3 sections of compositions of section；The construction section 21 is used for being installed in mo(u)ld top half ontology 1；The guide section 22 and 8 shape of the directed cavity
It is adapted, it is ensured that smoothly movement, and prevent gear box cover molten metal 7 excessive, it is provided with size on the lower plane of the guide section 22
The first core pilot hole being adapted with position and first hole core 4；The punch-pin 2 is equipped with the second hole core pilot hole 3, and described the
Two hole core pilot holes 3 run through the construction section 21, guide section 22 and figuration section 23；The figuration section 23 is located at the punch-pin 2
Bottom, coaxial with the workpiece chamber 9, shape and the cavity shape of size and gear box cover are adapted, and are subtracted for being formed
The inner cavity of fast case lid, mathematically the likelihood ratio is preferably the figuration section 23 with the workpiece chamber 9
The shape of the directed cavity 8 and 22 shape of guide section of the punch-pin 2 are adapted, and fit clearance between the two is
0.1mm, it is ensured that smoothly movement；Various Kong Xin include that the first hole core 4 and the second hole core 6 are installed on the cavity plate 5, the hole
The position consistency of the position of core and hole to be formed, the Kong Xin are preferably dimensioned to be the size 2mm less than hole to be formed, institute
The length for stating Kong Xin stretches into 2mm in 2 corresponding hole of the punch-pin when being preferably 2 minimum end in contact reduction box molten metal 7 of punch-pin.Institute
The 9 size ratio gear box cover correspondingly-sized of workpiece chamber for stating cavity plate 5 is preferably big 1mm, the allowance as gear box cover.
A kind of compression casting method of gear box cover using above-mentioned metal mold, includes the following steps：
(1) it pours into a mould：Punch-pin 2 is detached with cavity plate 5, and spacing is in 500mm, by the molten metal 7 of melting qualification within 1-3 seconds time
It is poured into 5 bottom of cavity plate, pours 1.01% that fluence is gear box cover blank weight；
(2) it squeezes and fills type：Mo(u)ld top half 1 drives 2 rapid downlink of punch-pin, and the guide section 22 of punch-pin is made to enter the directed cavity 8 of cavity plate 5
It is interior, it continues traveling downwardly, the second hole core 6 stretches into its corresponding second hole core pilot hole 3, and punch-pin figuration section 23 contacts gear box cover metal
After liquid 7, the inner cavity that gear box cover molten metal is full of entire cavity plate 5 is squeezed；
(3) pressurization feeding：With the cooled and solidified of gear box cover molten metal 7, mo(u)ld top half 1 drives punch-pin 2 to continue traveling downwardly, and increases
Pressure carries out rheology feeding to 20-50MPa, until gear box cover molten metal is completely solidified into shape；
(4) open form pickup：After gear box cover solidifies completely in 0 second time, makes 1 release of mo(u)ld top half and drive on punch-pin 2
Row, when Top Runby be 1/10 × gear box cover height when, by gear box cover eject cavity plate 5 and with the first hole core 4 and the second hole
Core 6 detaches, and mo(u)ld top half 1 continues uplink until can take out gear box cover between punch-pin 2 and cavity plate 5, obtains the DCY160- of the present invention
800 gear box cover products.
It will be in the corresponding punch-pin outer surface in gear box cover machining position, hole core outer surface and cavity plate inner surface before cast
Brushing or diatomite paint and the drying of coating thickness 1mm, to improve gear box cover machinability.Coating formula (weight
Percentage) it is diatomite 96%, waterglass 4%.
Using DCY160-800 gear box covers produced by the invention, interior tissue is fine and closely woven, and flawless, sand holes and shrinkage porosite lack
It falls into, for stock utilization up to 99%, production cost reduces by 12% than sand casting.
Embodiment 2
The present invention is used for the metal mold compression casting method of JZQ500 gear box covers, material HT200.
A kind of metal mold of gear box cover, the casting mold include mo(u)ld top half, mo(u)ld bottom half two parts；The mo(u)ld bottom half is by mo(u)ld bottom half ontology
It is formed with cavity plate 5, the edge of the cavity plate 5 is arranged in the mo(u)ld bottom half ontology, and the inner cavity of the cavity plate 5 is by directed cavity 8 and workpiece chamber 9
Two parts form, to make its casting mold integral finish upward, workpiece all in the mo(u)ld bottom half, efficiently solve existing sand mold and cast
The ropy problem of top surface caused by making split shed downwards；The cavity plate 5 is equipped with the first hole core 4 and the second hole core 6, described
Kong Xin (including the first hole core 4 and second hole core 6) position it is consistent with the position in gear box cover hole to be formed；The work
The shape and size and the shape of gear box cover of part chamber 9 are consistent with size, for forming the shape of reduction box；
The mo(u)ld top half is made of mo(u)ld top half ontology 1 and punch-pin 2, and the punch-pin 2 is successively by construction section 21, guide section 22 and figuration
23 3 sections of compositions of section；The construction section 21 is used for being installed in mo(u)ld top half ontology 1；The guide section 22 and 8 shape of the directed cavity
It is adapted, it is ensured that smoothly movement, and prevent gear box cover molten metal 7 excessive, it is provided with size on the lower plane of the guide section 22
The first core pilot hole being adapted with position and first hole core 4；The punch-pin 2 is equipped with the second hole core pilot hole 3, and described the
Two hole core pilot holes 3 run through the construction section 21, guide section 22 and figuration section 23；The figuration section 23 is located at the punch-pin 2
Bottom, coaxial with the workpiece chamber 9, shape and the cavity shape of size and gear box cover are adapted, and are subtracted for being formed
The inner cavity of fast case lid, mathematically the likelihood ratio is preferably the figuration section 23 with the workpiece chamber 9
The shape of the directed cavity 8 and 22 shape of guide section of the punch-pin 2 are adapted, and fit clearance between the two is
0.15mm, it is ensured that smoothly movement；Various Kong Xin include that the first hole core 4 and the second hole core 6 are installed on the cavity plate 5, described
The position consistency of the position of Kong Xin and hole to be formed, the Kong Xin are preferably dimensioned to be the size 4mm less than hole to be formed,
The length of the Kong Xin is stretched into when being preferably 2 minimum end in contact reduction box molten metal 7 of punch-pin in 2 corresponding hole of the punch-pin
10mm.The 9 size ratio gear box cover correspondingly-sized of workpiece chamber of the cavity plate 5 is preferably big 2mm, as gear box cover processing more than
Amount.
A kind of compression casting method of gear box cover using above-mentioned metal mold, includes the following steps：
(1) it pours into a mould：Punch-pin 2 is detached with cavity plate 5, and spacing is in 1000mm, by the molten metal 7 of melting qualification in 1-3 seconds time
It is inside poured into 5 bottom of cavity plate, pours 1.04% that fluence is gear box cover blank weight；
(2) it squeezes and fills type：Mo(u)ld top half 1 drives 2 rapid downlink of punch-pin, and the guide section 22 of punch-pin is made to enter the directed cavity 8 of cavity plate 5
It is interior, it continues traveling downwardly, the second hole core 6 stretches into its corresponding second hole core pilot hole 3, and punch-pin figuration section 23 contacts gear box cover metal
After liquid 7, the inner cavity that gear box cover molten metal is full of entire cavity plate 5 is squeezed；
(3) pressurization feeding：With the cooled and solidified of gear box cover molten metal 7, mo(u)ld top half 1 drives punch-pin 2 to continue traveling downwardly, and increases
Pressure carries out rheology feeding to 20-50MPa, until gear box cover molten metal is completely solidified into shape；
(4) open form pickup：After gear box cover solidifies completely in 0 second time, makes 1 release of mo(u)ld top half and drive on punch-pin 2
Row, when Top Runby be 9/10 × gear box cover height when, by gear box cover eject cavity plate 5 and with the first hole core 4 and the second hole
Core 6 detaches, and mo(u)ld top half 1 continues uplink until can take out gear box cover between punch-pin 2 and cavity plate 5, obtains the JZQ500 of the present invention
Gear box cover product.
It will be in the corresponding punch-pin outer surface in gear box cover machining position, hole core outer surface and cavity plate inner surface before cast
Brushing or diatomite paint and the drying of coating thickness 1mm, to improve gear box cover machinability.Coating formula (weight
Percentage) it is diatomite 96%, waterglass 4%.
It will be in the corresponding punch-pin outer surface in gear box cover machining position, hole core outer surface and cavity plate inner surface before cast
Brushing or diatomite paint and the drying of coating thickness 0.75mm, to improve gear box cover machinability.Coating formula (weight
Measure percentage) it is diatomite 93%, waterglass 7%.
Using JZQ500 gear box covers produced by the invention, interior tissue is fine and closely woven, flawless, sand holes and shrinkage defect, material
Utilization rate is expected up to 98%, and production cost reduces by 15% than sand casting.
Embodiment 3
The present invention is used for the metal mold compression casting method of ZSY710 gear box covers, material QT400-12.
A kind of metal mold of gear box cover, the casting mold include mo(u)ld top half, mo(u)ld bottom half two parts；The mo(u)ld bottom half is by mo(u)ld bottom half ontology
It is formed with cavity plate 5, the edge of the cavity plate 5 is arranged in the mo(u)ld bottom half ontology, and the inner cavity of the cavity plate 5 is by directed cavity 8 and workpiece chamber 9
Two parts form, to make its casting mold integral finish upward, workpiece all in the mo(u)ld bottom half, efficiently solve existing sand mold and cast
The ropy problem of top surface caused by making split shed downwards；The cavity plate 5 is equipped with the first hole core 4 and the second hole core 6, described
Kong Xin (including the first hole core 4 and second hole core 6) position it is consistent with the position in gear box cover hole to be formed；The work
The shape and size and the shape of gear box cover of part chamber 9 are consistent with size, for forming the shape of reduction box；
The mo(u)ld top half is made of mo(u)ld top half ontology 1 and punch-pin 2, and the punch-pin 2 is successively by construction section 21, guide section 22 and figuration
23 3 sections of compositions of section；The construction section 21 is used for being installed in mo(u)ld top half ontology 1；The guide section 22 and 8 shape of the directed cavity
It is adapted, it is ensured that smoothly movement, and prevent gear box cover molten metal 7 excessive, it is provided with size on the lower plane of the guide section 22
The first core pilot hole being adapted with position and first hole core 4；The punch-pin 2 is equipped with the second hole core pilot hole 3, and described the
Two hole core pilot holes 3 run through the construction section 21, guide section 22 and figuration section 23；The figuration section 23 is located at the punch-pin 2
Bottom, coaxial with the workpiece chamber 9, shape and the cavity shape of size and gear box cover are adapted, and are subtracted for being formed
The inner cavity of fast case lid, mathematically the likelihood ratio is preferably the size of the figuration section 23 and the workpiece chamber 9
The shape of the directed cavity 8 and 22 shape of guide section of the punch-pin 2 are adapted, and fit clearance between the two is
0.12mm, it is ensured that smoothly movement；Various Kong Xin include that the first hole core 4 and the second hole core 6 are installed on the cavity plate 5, described
The position consistency of the position of Kong Xin and hole to be formed, the Kong Xin are preferably dimensioned to be the size 3mm less than hole to be formed,
The length of the Kong Xin stretches into 6mm in 2 corresponding hole of the punch-pin when being preferably 2 minimum end in contact reduction box molten metal 7 of punch-pin.
The 9 size ratio gear box cover correspondingly-sized of workpiece chamber of the cavity plate 5 is preferably big 1mm, the allowance as gear box cover.
A kind of compression casting method of gear box cover using above-mentioned metal mold, includes the following steps：
(1) it pours into a mould：Punch-pin 2 is detached with cavity plate 5, and spacing is in 750mm, by the molten metal 7 of melting qualification within 1-3 seconds time
It is poured into 5 bottom of cavity plate, pours 1.02% that fluence is gear box cover blank weight；
(2) it squeezes and fills type：Mo(u)ld top half 1 drives 2 rapid downlink of punch-pin, and the guide section 22 of punch-pin is made to enter the directed cavity 8 of cavity plate 5
It is interior, it continues traveling downwardly, the second hole core 6 stretches into its corresponding second hole core pilot hole 3, and punch-pin figuration section 23 contacts gear box cover metal
After liquid 7, the inner cavity that gear box cover molten metal is full of entire cavity plate 5 is squeezed；
(3) pressurization feeding：With the cooled and solidified of gear box cover molten metal 7, mo(u)ld top half 1 drives punch-pin 2 to continue traveling downwardly, and increases
Pressure carries out rheology feeding to 20-50MPa, until gear box cover molten metal is completely solidified into shape；
(4) open form pickup：After gear box cover solidifies completely in 0 second time, makes 1 release of mo(u)ld top half and drive on punch-pin 2
Row, when Top Runby be 4/10 × gear box cover height when, by gear box cover eject cavity plate 5 and with the first hole core 4 and the second hole
Core 6 detaches, and mo(u)ld top half 1 continues uplink until can take out gear box cover between punch-pin 2 and cavity plate 5, obtains the DCY160- of the present invention
800 gear box cover products.
It will be in the corresponding punch-pin outer surface in gear box cover machining position, hole core outer surface and cavity plate inner surface before cast
Brushing or diatomite paint and the drying of coating thickness 1mm, to improve gear box cover machinability.Coating formula (weight
Percentage) it is diatomite 96%, waterglass 4%.
It will be in the corresponding punch-pin outer surface in gear box cover machining position, hole core outer surface and cavity plate inner surface before cast
Brushing or diatomite paint and the drying of coating thickness 0.5mm, to improve gear box cover machinability.Coating formula (weight
Measure percentage) it is diatomite 90%, waterglass 10%.
Using ZSY710 gear box covers produced by the invention, interior tissue is fine and closely woven, flawless, sand holes and shrinkage defect, material
Utilization rate is expected up to 96%, and production cost reduces by 18% than sand casting.
Raw materials used in the present invention is to commonly use raw material in the production of this field, can be obtained from market, and for production
As a result it will not have an impact；Various equipment employed in the present invention are the conventional equipment used in the production technology of this field,
And operation, the parameter etc. of each equipment are carried out according to routine operation, have no special feature.
Claims (2)
1. a kind of metal mold of gear box cover, it is characterised in that：The casting mold includes mo(u)ld top half, mo(u)ld bottom half two parts；The mo(u)ld bottom half
Be made of mo(u)ld bottom half ontology and cavity plate, the female die embedding is arranged in the mo(u)ld bottom half ontology, the inner cavity of the cavity plate by directed cavity and
Workpiece chamber two parts form；The cavity plate is equipped with the first hole core and the second hole core, and the Kong Xin includes the first hole core and second
The position of Kong Xin is consistent with the position in gear box cover hole to be formed；The shape and size of the workpiece chamber and gear box cover
Shape is consistent with size；The mo(u)ld top half is made of mo(u)ld top half ontology and punch-pin, and the punch-pin is by construction section, guide section and figuration section three
Duan Zucheng；The construction section is used for being installed in mo(u)ld top half ontology；The guide section is adapted with the directed cavity shape, described to lead
The first core pilot hole that size and position are adapted with first hole core is provided on the lower plane of section；The punch-pin is equipped with the
Two hole core pilot holes, the second hole core pilot hole run through the construction section, guide section and figuration section；The figuration section is located at
The bottom of the punch-pin, coaxial with the workpiece chamber, shape and the cavity shape of size and gear box cover are adapted；It is described
The shape of directed cavity and the guide section shape of the punch-pin are adapted；The Kong Xin includes that the first hole core and the second hole core are respectively mounted
On the cavity plate, the position of the Kong Xin is consistent with the position in hole to be formed；
The size of the Kong Xin is less than the size 2-4mm in hole to be formed；
The length of the Kong Xin stretches into 2-10mm in the corresponding hole of the punch-pin when being the minimum end in contact reduction box molten metal of punch-pin；
Mathematically the likelihood ratio is the figuration section with the workpiece chamber
The workpiece chamber size of the cavity plate is bigger 1-3mm than gear box cover correspondingly-sized.
2. a kind of compression casting method of gear box cover using metal mold described in claim 1, which is characterized in that including such as
Lower step：
(1) it pours into a mould：The mo(u)ld top half for the metal mold for being coated with diatomite paint and mo(u)ld bottom half are separated to spacing 500-1000mm, by reduction box
Lid molten metal was poured into female bottom within 1-3 seconds time, poured 1.01-1.04 times that fluence is gear box cover blank weight；
(2) it squeezes and fills type：Mo(u)ld top half drives the rapid downlink of punch-pin, and the guide section of punch-pin is made to enter in the directed cavity of cavity plate and along guiding
Section continues traveling downwardly, and the second hole core stretches into its corresponding second hole core pilot hole, after punch-pin figuration section contacting metal liquid, squeezes metal
Liquid makes molten metal gradually be full of entire workpiece chamber；
(3) pressurization feeding：With the cooled and solidified of molten metal, mo(u)ld top half drives punch-pin to continue traveling downwardly, increase pressure to 20-50MPa,
Rheology feeding is carried out, until gear box cover is completely solidified into shape；
(4) open form pickup：After gear box cover solidifies completely in 0-2 seconds time, makes mo(u)ld top half release and drive punch-pin uplink, when
Top Runby isWhen, gear box cover is ejected into cavity plate and is detached with hole core, mo(u)ld top half continues
Uplink obtains gear box cover product up to can take out gear box cover between mo(u)ld top half and mo(u)ld bottom half；
Before the step (1) cast, in the corresponding punch-pin outer surface in gear box cover machining position, hole core outer surface and recessed
The diatomite paint of the brushing of mould inner surface or coating thickness 0.5-1mm, the weight percent diatomite 90-96% of the coating,
Waterglass 4-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410524709.1A CN104308083B (en) | 2014-10-09 | 2014-10-09 | The metal mold and its compression casting method of gear box cover |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410524709.1A CN104308083B (en) | 2014-10-09 | 2014-10-09 | The metal mold and its compression casting method of gear box cover |
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| CN104308083B true CN104308083B (en) | 2018-07-17 |
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| JPH09122871A (en) * | 1995-11-08 | 1997-05-13 | Jinzai Kogyosho:Goushi | Die for casting capable of change of insert |
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| CN101954469A (en) * | 2010-06-29 | 2011-01-26 | 北京交通大学 | Manufacturing method of bucket tooth and applied mould thereof |
| CN103433462A (en) * | 2013-08-17 | 2013-12-11 | 昆山西诺巴精密模具有限公司 | Die-casting mould frame |
| CN203737983U (en) * | 2014-03-19 | 2014-07-30 | 宁波东浩铸业有限公司 | Die-casting die for opening end cover |
| CN203830699U (en) * | 2014-05-28 | 2014-09-17 | 宁波市佳利来机械制造有限公司 | Die-casting shaping mold for sealing covers of scavenging openings of engines |
| CN203862989U (en) * | 2014-06-16 | 2014-10-08 | 宁波市佳利来机械制造有限公司 | Motor end cover forming mold |
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2014
- 2014-10-09 CN CN201410524709.1A patent/CN104308083B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09122871A (en) * | 1995-11-08 | 1997-05-13 | Jinzai Kogyosho:Goushi | Die for casting capable of change of insert |
| CN101528387A (en) * | 2006-10-16 | 2009-09-09 | 新东工业株式会社 | Mold |
| CN101954469A (en) * | 2010-06-29 | 2011-01-26 | 北京交通大学 | Manufacturing method of bucket tooth and applied mould thereof |
| CN103433462A (en) * | 2013-08-17 | 2013-12-11 | 昆山西诺巴精密模具有限公司 | Die-casting mould frame |
| CN203737983U (en) * | 2014-03-19 | 2014-07-30 | 宁波东浩铸业有限公司 | Die-casting die for opening end cover |
| CN203830699U (en) * | 2014-05-28 | 2014-09-17 | 宁波市佳利来机械制造有限公司 | Die-casting shaping mold for sealing covers of scavenging openings of engines |
| CN203862989U (en) * | 2014-06-16 | 2014-10-08 | 宁波市佳利来机械制造有限公司 | Motor end cover forming mold |
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|---|---|
| CN104308083A (en) | 2015-01-28 |
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