CN216370117U - Improved hub casting mold system - Google Patents
Improved hub casting mold system Download PDFInfo
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- CN216370117U CN216370117U CN202122489536.2U CN202122489536U CN216370117U CN 216370117 U CN216370117 U CN 216370117U CN 202122489536 U CN202122489536 U CN 202122489536U CN 216370117 U CN216370117 U CN 216370117U
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- cavity
- spoke
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- rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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- 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
- B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The improved hub casting mould system comprises a hub casting mould, wherein a casting cavity for forming a hub is arranged in the hub casting mould, and the casting cavity comprises a central core cavity, a peripheral rim cavity and a spoke cavity communicated with the core cavity and the rim cavity; the spoke structure is characterized in that a coolant pipe is arranged on a mold cavity wall body close to the middle area of a spoke cavity and is used for leading the molten metal in the spoke cavity on the side edge of the coolant pipe to be partially solidified to form a spoke node; a rod channel is also arranged in the hub casting mould and is communicated with a casting cavity through a mould corner part intersected between the spoke cavity and the rim cavity; the integrated top plate is also included, a pressure rod is movably inserted in the rod channel, the top end of the pressure rod is connected to the integrated top plate, and the shape of the tail end surface of the pressure rod is adapted to the corner transition part between the rim and the spoke; the spoke nodes can provide reverse supporting force for compression rod compaction feeding, so that feeding of the corner transition part is achieved under bidirectional pressure.
Description
Technical Field
The invention relates to the field of hub casting, in particular to a hub casting mold system.
Background
At present, a low-pressure casting process is widely applied to the casting production of alloy hubs, and a low-pressure casting mold generally comprises a mold casting cavity which can be divided into a core cavity, a spoke cavity and a rim cavity from inside to outside according to the shape of a hub-shaped casting. After the casting of the casting cavity is finished, the molten metal in the casting cavity is sequentially solidified according to the sequence from the rim cavity, the spoke cavity to the wheel core cavity. However, the wall thickness of each part of the hub casting is generally different greatly, for example, the wall thickness of the corner of the casting R where the spoke is connected with the rim is thicker, and the wall thickness of the spoke is thinner; in the process of solidification after casting, the thin spoke part can be solidified before the thick R corner part, so that the R corner part of the hub casting is easy to shrink and loosen, the structural strength of the hub casting is influenced, and the rejection rate is improved. To solve this problem, conventional solutions have either increased the wall thickness or width of the spoke to slow the cooling rate of the spoke, or increased the cooling of the corner of the casting R or the temperature of the spoke to reduce the temperature differential at which the thick and thin portions solidify, but these measures have less than ideal results.
For this reason, improvements have been made continuously on a casting mold and a manufacturing process thereof, as japanese patent invention, entitled low pressure casting mold, for example, JP6975993, discloses a low pressure casting mold for casting an alloy hub, which is composed of a lower mold, an upper mold and a horizontal mold, and which forms a cavity inside, wherein a portion of the mold, in which a hub disc (i.e., a spoke) contacts a thicker joint portion of a rim (i.e., a casting R corner), is formed separately from the other mold portion, and is movably supported to form a movable mold portion. A pressing cylinder is connected to the movable mold portion, and when the movable mold portion is pushed in a direction of reducing the thickness of the thick joining portion by the pressing cylinder, the metal in the thick joining portion is pushed and pressed. Thus, the shrinkage cavity can be compacted when the molten metal is solidified, so that the compaction feeding effect can be realized.
Although the local shrinkage porosity problem of the casting is improved to a certain extent by using the pressurizing mechanism in the casting mold, in the cooling and solidification process of the casting, a gating system is still required for carrying out pressure maintaining and feeding treatment on the casting in the whole casting cavity, so that the pressure casting mold and the casting process still have a space for further improvement.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an improved hub casting mold system which comprises a hub casting mold, wherein a casting cavity for forming a hub is arranged in the hub casting mold, and the casting cavity comprises a central core cavity, a peripheral rim cavity and a spoke cavity for communicating the core cavity and the rim cavity; the spoke structure is characterized in that a coolant pipe is arranged on a mold cavity wall body close to the middle area of a spoke cavity, and the coolant pipe is used for leading the molten metal in the spoke cavity on the side edge of the coolant pipe to be partially solidified to form a spoke node; a rod channel is further arranged in the hub casting mould and is communicated with the casting cavity through a mould corner part intersected between the spoke cavity and the rim cavity; the wheel hub is characterized by further comprising an integrated top plate, a pressure rod is movably inserted in the rod channel in a penetrating mode, the top end of the pressure rod is connected to the integrated top plate, and the shape of the tail end face of the pressure rod is matched with the corner transition position between the rim and the spoke.
The casting cavity is a hub-shaped space provided in the hub casting mold, and the casting cavity is generally manufactured according to the shape of the hub, so the space shapes of different parts of the casting cavity are different, for example, the spokes of the hub are in a radial strip shape or a plate shape, the corresponding spoke cavity space is also in a strip shape or a plate shape, and the space of a single spoke cavity is relatively small.
The cooling device comprises a cooling medium pipe, a spoke cavity, a cooling medium pipe and a cooling medium pipe, wherein the cooling medium pipe is arranged on a mold wall body in the middle area of the spoke cavity, the cooling medium pipe is a member which can carry out cooling and conveying of a cooling medium and has a cooling function, the cooling medium pipe is used for carrying out heat exchange on the mold wall body in the middle area of the spoke cavity, so that molten metal in the spoke cavity on the side edge of the cooling medium pipe is rapidly cooled and solidified to form a spoke node, generally speaking, the space volume of the spoke cavity corresponding to the middle area of the spoke cavity is small, the molten metal in the spoke cavity in the area is small, and therefore the molten metal in the area can be solidified fastest and separated to form the spoke node communicated with the two ends of the spoke cavity by cooling the area. The spoke nodules can provide reverse supporting force for the compression rod compaction feeding impact force, so that feeding of the corner transition part is achieved under bidirectional pressure, feeding is reliable, and feeding compactness and mechanical strength are greatly improved; in the feeding stage, due to the existence of the spoke nodules, compared with the feeding scheme in the prior art, feeding of the whole hub through the pouring gate is not needed to be considered, only the hub wall body around the pouring gate needs to be considered through the pouring gate, and feeding difficulty is reduced.
The rod channel is a space channel which is arranged in the hub casting mould and is used for communicating with the wall body of the casting cavity, and the compression rod is a rod-shaped component which is arranged in the rod channel and matched with the rod channel and can move back and forth in the rod channel.
In a typical application, the hub includes a plurality of spokes and corresponding corner transition portions, so that a plurality of die corner portions are correspondingly disposed on the hub mold, a plurality of sets of rod channels and pressure rods are arranged on the mold at intervals to be adapted to the hub structure of the plurality of spokes, the top ends of the plurality of pressure rods are all connected to the integrated top plate, and the driving force of the driving mechanism is transmitted to each pressure rod through the integrated top plate, that is, the integrated top plate is driven by the driving mechanism and can drive the pressure rods.
In the hub manufacturing process, a hub is generally designed first, and then a mold for casting the hub is designed according to the designed hub shape, wherein the mold has a hub cavity for forming the hub. The shape of the die corner region between the rim cavity and the spoke cavity, which is designed and manufactured for this purpose, is also necessarily adapted to the shape of the corner transition region between the rim and the spoke, or is determined and manufactured by the shape of the die corner region, for which purpose the die corner region is present in the hub cavity, through which the stem channel communicates with the casting cavity, i.e. it is defined that the outlet of the stem channel is arranged exactly at the die corner region; on the basis, the shape of the tail end face of the pressure rod is matched with the corner transition part between the rim and the spoke, firstly, the shape of the tail end face of the pressure rod is defined to be the appearance shape determined according to the design data of the corner transition part between the rim and the spoke, secondly, the pressure rod is positioned at a first working position when the hub is cast, and when the pressure rod is at the first working position, the tail end face of the pressure rod is connected with the wall body of a mould around the outlet of the rod channel to form the mould corner part for forming the corner transition part so as to facilitate the hub cavity to cast the hub; in the feeding stage after casting is completed, according to the purpose of the present invention, on the basis of rapidly cooling the spoke cavity through the refrigerant pipe to form the spoke nodes, the compression rod is driven by the compression driving mechanism to move inwards from the first working position, and the corner transition part is compressed and compacted while hot to complete feeding.
According to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that: firstly, the wheel hub casting mould system comprises a wheel hub casting mould, a refrigerant pipe and a pressure lever, the system firstly leads metal liquid in a wheel spoke cavity to be firstly solidified through the refrigerant pipe and form a wheel spoke node (similar to intestinal infarction), and the wheel spoke node can provide reverse supporting force for compaction and feeding of the pressure lever because the corner transition part is positioned at the side edge position of the wheel spoke node, so that feeding of the corner transition part is realized under bidirectional pressure, feeding is reliable, the compactness and mechanical strength of feeding are greatly improved, the problem of easy shrinkage porosity of the corner transition part is solved, and feeding of other parts is not hindered; secondly, in the feeding stage, due to the existence of the spoke nodules, compared with the feeding scheme in the prior art, feeding of the whole hub through the pouring gate is not needed to be considered, only the hub wall body around the pouring gate needs to be considered through the pouring gate, and the feeding difficulty is reduced.
The further technical scheme can also be that the rod channel and the pressure rod are obliquely arranged on the hub casting die. In one embodiment, the hub casting mold includes an upper mold having an upper cavity, the stem passage extending obliquely from the cavity bottom corner through the mold corner region to communicate with the hub cavity.
The further technical scheme can also be that the top end of the pressure lever is arranged on the integrated top plate in a sliding manner. When the obliquely arranged compression bar moves at the corner part of the die, the compression bar can move along the moving direction of the integrated top plate and also can move in a radial direction, and a connecting structure capable of sliding between the top end of the compression bar and the integrated top plate just leaves a space for the compression bar to move in the radial direction; in this way, the movable connection between the driving mechanism and the pressure lever can be well realized through the integrated top plate.
The further technical scheme can also be that the device further comprises a driving device, a power output shaft of the driving device is connected to the integrated top plate, and the driving device is used for driving the integrated top plate and the pressure rod to move. The driving device can be a driving oil cylinder or a driving motor; the driving device can drive the integrated top plate and the pressure rod to move to the corner part of the die to perform compaction action, and can also drive the integrated top plate and the pressure rod to reset to perform pouring or die opening action.
The technical scheme can also be that the cooling device further comprises a refrigerant conveying device, wherein the refrigerant conveying device is communicated with the refrigerant pipe, and the refrigerant conveying device is used for providing cooling water or gas for the refrigerant pipe. The water or the gas is one of the refrigerants, the type of the selected refrigerant depends on the spoke shape of the casting, and for example, when the spoke is fine, the refrigerant can be air; when the spoke is thick, the refrigerant is water.
On the basis of the hub casting mould system, the invention also discloses a hub casting processing method, which comprises a hub casting mould, wherein a casting cavity for forming a hub is arranged in the hub casting mould, and the casting cavity comprises a central core cavity, a peripheral rim cavity and a spoke cavity for communicating the core cavity and the rim cavity; the spoke structure is characterized in that a cooling medium pipe is arranged on a mold cavity wall body close to the middle area of the spoke cavity, during condensation after casting of the casting cavity, the middle area of the spoke cavity is cooled and solidified through a cooling medium in the cooling medium pipe to form a spoke node in the cavity, and then corner transition parts between the rim and the spoke are subjected to compaction force to realize feeding. The spoke structure has the advantages that spoke nodes are formed in the middle area in the spoke cavity through the cooling effect of the refrigerant pipe, reverse supporting force can be provided for feeding, and the corner transition portion is located under the bidirectional acting force of the compression bar compaction force and the spoke nodes, so that the shrinkage porosity problem is solved, and the compactness and the mechanical strength of feeding are greatly improved.
The further technical scheme can also be that the hub casting mould further comprises a pouring gate communicated with the core cavity, and molten metal can be poured into the casting cavity through the pouring gate; after the formation of the spoke nodules in the cavity and while applying a compaction force to the corner transitions between the rim and the spokes, the casting pressure of the gate is maintained until the metal in the core cavity is completely solidified. In the feeding stage, due to the spoke nodules, compared with the feeding scheme in the prior art, the feeding of the corner transition part is realized in a local compaction mode, so that the feeding of the whole hub through the sprue is not considered, the casting pressure of the sprue only needs to consider the feeding of the hub wall body on the periphery of the sprue, and the feeding difficulty is reduced.
The technical scheme is that a rod channel communicated with the casting cavity is further arranged in the hub casting mold, the rod channel leads to a mold corner part intersected between the spoke cavity and the rim cavity, a pressure rod is arranged in the rod channel, the shape of the tail end face of the pressure rod is matched with the corner transition part between the rim and the spoke, and the pressure rod is pushed to apply compaction force to the corner transition part between the rim and the spoke so as to realize feeding. In the casting stage, the pressure rod is located at the first working position, and the tail end face of the pressure rod is connected with the die wall body around the rod channel outlet to form a die corner part for forming the corner transition part, so that the hub cavity can conveniently cast the hub; in the feeding stage, the compression rod moves inwards from the first working position so as to compact the corner transition part to complete feeding
The hub casting mould comprises an upper mould, a lower mould and a side mould, wherein the upper mould, the lower mould and the side mould are combined to form a casting cavity of the hub, an upper cavity is formed in the central area of the upper part of the upper mould, a rod channel is obliquely arranged in the upper mould, and the rod channel leads to the corner part of the mould from the lower corner position of the upper cavity. The lower corner position of the upper cavity is just corresponding to the die corner position, and the rod channel is arranged at the corner position, so that the connection distance between the rod channel and the die corner position is shortest, and the manufacturing efficiency is improved.
Due to the above features and advantages, the present invention may be applied to a hub casting mold system.
Drawings
FIG. 1 is a schematic elevational sectional view of a hub casting mold embodying the present invention;
FIG. 2 is a schematic elevational, cross-sectional view of the compaction drive mechanism;
FIG. 3 is a schematic cross-sectional view taken along the line A-A in FIG. 2;
FIG. 4 is an exploded view of the compaction drive mechanism;
FIG. 5 is a schematic view of the structure in the hub axial direction.
Detailed Description
The hub casting mold system, the compaction driving mechanism applied to the hub casting mold system and the hub casting processing method according to the technical scheme of the invention are further described with reference to the accompanying drawings.
As shown in fig. 1 and 5, the present invention provides an improved wheel hub casting mold system, which includes a wheel hub casting mold, wherein the wheel hub casting mold includes an upper mold 1, a lower mold 2 and a side mold 3, the side mold 3 is disposed between the upper mold 1 and the lower mold 2, the upper mold 1, the lower mold 2 and the side mold 3 form a casting cavity 10 forming a wheel hub, and the casting cavity 10 includes a central wheel core cavity 11, a peripheral wheel rim cavity 12 and a spoke cavity 13 communicating the wheel core cavity 11 and the wheel rim cavity 12; according to the general casting mold process, the cavity of the hub casting mold is designed according to the designed hub shape, so the shape of the casting cavity 10 corresponds to the designed hub shape, wherein the shape of the corner transition part 18 between the rim and the spoke corresponds to the mold corner part 15 of the intersection of the spoke cavity 13 and the rim cavity 12. The lower die 2 is also provided with a pouring gate 14 communicated with the core cavity 11, molten metal can be poured into the casting cavity 10 through the pouring gate 14, and the molten metal poured into the casting cavity 10 can flow along the core cavity 11, the spoke cavity 13 and the die corner part 15 to the rim cavity 12 until the filling is completed.
Due to the fact that the thicknesses of materials of different parts of the hub are different, the space volumes of the chambers are different greatly. The spoke cavities 13 in the shape of radial strips or plates are small, and the space volume of the die corner part 15 formed by the intersection of the spoke cavities 13 and the rim cavity 12 corresponding to the shape of the corner transition part 18 between the rim and the spoke is relatively large. In use of the hub, the corner transition 18 between the rim and the web is the most vulnerable to damage and fatigue due to the relatively concentrated stress, and how to improve the feeding effect at this location is directly related to the service life of the hub. The following solution is a new solution provided for how to further improve the feeding effect of the corner transition 18 between the rim and the spoke.
Firstly, the wheel hub casting mold system further comprises a refrigerant pipe 22 arranged on a mold cavity wall body close to a middle area of the spoke cavity 13, wherein the middle area of the spoke cavity 13 is an area approximately in the middle of the spoke cavity 13 in the length direction, and the space volume of the spoke cavity 13 in the middle area is relatively small, that is, the molten metal poured into the area is relatively less, so that the molten metal is relatively easily cooled down. In this embodiment, the refrigerant pipe 22 is disposed on a wall of the lower mold 2 near the mold corner 15, and the refrigerant pipe 22 has a cooling function, as shown in fig. 1, a protrusion 21 is disposed on a wall of the lower mold 2 near a middle region of the spoke cavity 13, a refrigerant pipe 22 is disposed in the annular protrusion 21, and refrigerant such as cold air and cold water can be conveyed in the refrigerant pipe 22; the annular convex block 21 is further provided with a feeding pipe 23 and a discharging pipe 24, a refrigerant can enter the refrigerant pipe 22 through the feeding pipe 23, heat on the wall body of the lower die 2 is taken away through heat exchange, and then the refrigerant is discharged from the discharging pipe 24, so that molten metal in the spoke cavity 13 on the side edge of the refrigerant pipe 22 can be locally solidified first through the refrigerant pipe 22 to form spoke nodules a, the spoke nodules a are equivalent to divide the casting cavity 10 into a wheel core-spoke region close to one side of the sprue 14 and a peripheral spoke-rim region, and the die corner part 15 is located in the spoke-rim region and close to the spoke nodules a.
Further, the cooling device further comprises a refrigerant conveying device 31, an output end 32 of the refrigerant conveying device 31 is communicated with the feeding pipe 23 of the refrigerant pipe 22, an input end 33 of the refrigerant conveying device 31 is communicated with the discharging pipe 24, and the refrigerant conveying device 31 is used for providing a refrigerant for cooling to the refrigerant pipe 22. The water or the gas is a common refrigerant, the cooling effect of the water is better than that of the gas, the type of the selected refrigerant depends on the spoke shape of the casting, and if the spoke of the hub is fine, the refrigerant can be air; when the spoke is thick, the coolant can be water.
In order to realize the feeding of the corner transition part 18 of the hub cast corresponding to the mold corner part 15, the hub casting mold system further includes a rod channel 16, the rod channel 16 is a space channel arranged on the hub casting mold, the rod channel 16 is communicated with the casting cavity 10 through the mold corner part 15 intersected between the spoke cavity 13 and the rim cavity 12, and the outlet size of the rod channel 16 at least occupies part of the mold corner part 15. As shown in fig. 1, the rod channel 16 is provided on the wall of the upper mold 1, the upper central region of the upper mold 1 has an upper cavity 17, and the rod channel 16 leads from the lower corner position of the upper cavity 17 to the mold corner portion 15 in an inclined manner, the rod channel 16 communicates with the casting cavity 10 via the mold corner portion 15, and the rod channels 16 arranged left and right are arranged in a splayed manner.
The hub casting die system further comprises a pressure rod 4 movably inserted in the rod channel 16, wherein the pressure rod 4 is T-shaped and provided with a head part 41 and a rod body part 42, the tail end part of the rod body part 42 is inserted into the rod channel 16, and the tail end part of the rod body part 42 is matched with the rod channel 16 and can move back and forth. Wherein a clearance fit of more than zero is provided between the rear end portion of the shaft portion 42 and the shaft passage 16, so that the rear end portion of the shaft portion 42 can be smoothly moved but the pouring of the molten aluminum can be prevented from flowing out through the clearance between the rear end portion of the shaft portion 42 and the shaft passage 16.
The pressure rod 4 and the rod channel 16 have two relative position states, in the pouring stage, the pressure rod 4 is positioned at the first working position, the shape of the tail end surface 43 of the pressure rod 4 is matched with the corner transition part 18 between the rim and the spoke, and the tail end surface 43 of the pressure rod 4 is connected with the mold wall body around the outlet of the rod channel 16 to form a mold corner part 15 for forming the corner transition part 18, so that the corner transition part 18 is formed. In the feeding stage after the pouring is completed, on the basis that the molten metal in the spoke cavity 13 is partially cooled by the refrigerant pipe 22 and is firstly solidified into the spoke nodules a, the compression rod 4 moves inwards from the first working position, and the corner transition part 18 is extruded and compacted while hot to complete feeding of the corner transition part 18. At this time, the extrusion force of the spoke node a to the pressure lever 4 forms reverse support and opposition, and the compactness and feeding effect of the corner transition part 18 of the hub are improved together.
Since the hub generally comprises a plurality of spokes and the corresponding corner transition 18, a plurality of corresponding die corner portions 15 are also provided on the hub die, and the die corner portions 15 are arranged in a ring around the center line of the casting cavity 10. In order to compact the casting at each of the mold corner portions 15, one of the rod passages 16 and one of the compression rods 4 are combined into one set and correspondingly arranged at one of the corner transition portions 18, a plurality of sets of the rod passages 16 and the compression rods 4 are annularly arranged on the mold, and a plurality of sets of the rod passages 16 and the compression rods 4 are arranged on the mold in a spaced manner to be adapted to a multi-spoke hub structure.
In order to realize the back-and-forth movement of the pressure rod 4 in the rod channel 16, the hub casting mold system further comprises a compaction driving mechanism 6, the top end of the pressure rod 4 is connected to the compaction driving mechanism 6, and the compaction driving mechanism 6 is used for positioning the pressure rod 4 and providing a moving driving force for the pressure rod 4. The compaction drive mechanism 6 comprises an integrated top plate, the integrated top plate comprises a base plate 7 and a cover plate 8, the base plate 7 and the cover plate 8 are respectively annular and are arranged in an upper cavity 17 of the upper die 1, and thus the integrated top plate is provided with a middle through hole so as to be convenient for installing other devices (such as a wheel core cavity cooling device); in addition, the base plate 7 and the cover plate 8 are detachably fastened together by bolts or fastened together by welding in order to connect the strut 4.
As shown in fig. 1 to 4, the T-shaped press rod 4 is slidably connected to the integrated top plate through a head 41 at a top end, the base plate 7 is pot-shaped and has a pot wall 71 inclined downward, a pot opening of the base plate 7 faces upward, a plurality of strip-shaped sliding grooves 72 arranged in a radial manner are arranged on the pot wall 71, a pot wall region of the pot wall 71 where the strip-shaped sliding grooves 72 are arranged is located on a rotation plane with a central axis X as a reference, that is, the pot wall region where the strip-shaped sliding grooves 72 are arranged is rotationally symmetric, so that the strip-shaped sliding grooves 72 are arranged in a concentric annular configuration.
The strip-shaped sliding grooves 72 are communicated with the upper space and the lower space of the base plate 7 and can allow the rod body part 42 of the press rod 4 to pass through, the strip-shaped sliding grooves 72 are arranged in a concentric annular structure, which defines the relative positions among the strip-shaped sliding grooves 72, the strip-shaped sliding grooves 72 are all positioned on the same annular track on the inclined pot wall 71 of the base plate, the strip-shaped sliding grooves 72 are not only arranged at intervals, but also the same parts of the strip-shaped sliding grooves 72 are all positioned on a concentric circumference. The strip-shaped sliding groove 72 extends on the inclined pan wall 71, so that the pressure lever 4 inserted in the strip-shaped sliding groove 72 can slide back and forth on the inclined pan wall 71. Since the pot opening of the base plate 7 is upward, when the pressing rod 4 moves upward along the strip-shaped sliding groove 72, the upward displacement in the X-axis direction is included, and the outward displacement in the Y-axis direction (i.e., radial direction) is also included, so that the pressing rod 4 can be inserted into the rod channel 16 which is obliquely arranged and can move.
The further technical scheme can also be that the upper part of the strip-shaped sliding chute 72 is in a shape of a settling pit to form an upper pit, the upper pit comprises a pit bottom wall 74, a left pit side wall 75 and a right pit side wall 76 which are positioned at the left side and the right side of the pit bottom wall 74 and are vertically arranged, and the upper pit is provided with a notch 77. The bar-shaped sliding groove 72 further comprises a bar-shaped through hole 73 formed in the bottom wall 74 of the pit, the width of the notch 77 is greater than that of the bar-shaped through hole 73, the cover plate 8 covers the notch 77 of the upper pit, when the pressing rod 4 is inserted into the substrate 7 from top to bottom, the rod body 42 of the pressing rod 4 can pass through the upper pit and the bar-shaped through hole 73 from top to bottom and extend out in an outward inclined direction below the substrate 7, and the head 41 of the pressing rod 4 is limited in the upper pit and cannot be pulled out of the bar-shaped through hole 73. In another equivalent embodiment, the left and right pit side walls 75, 76 of the upper pit are arranged in a slope shape, so that the entire upper pit is in a dovetail shape when viewed in the cross section direction, and the head 41 of the press rod 4 is also in a matched dovetail shape, in which case the left and right pit side walls 75, 76 may also be the pit bottom walls of the upper pit at the same time.
Because the engagement between the rear end face 43 of the plunger 4 and the corner transition portion 18 has a certain directionality, in order to limit the rotation of the plunger 4, a directional sidewall 44 is disposed on the head portion 41 of the plunger 4, and when the head portion 41 of the plunger 4 is limited in the upper recess, the directional sidewall 44 is disposed in close contact with the left recess sidewall 75 to limit the rotation of the plunger 4, but not to affect the sliding thereof. Further, the lower bottom surface of the cover plate 8 is also fixedly connected to the upper surface of the base plate 7 in a pan bottom shape, and the head 41 of the press rod 4 is limited between the base plate 7 and the cover plate 8 but can slide along the strip-shaped sliding groove 72 under the cover plate 8. In this way, except for the pressing rod 4, the pressing rod 4 can be driven by the integrated top plate to linearly move in the vertical direction, the pressing rod 4 can slide on the integrated top plate through the strip-shaped sliding groove 72 and the pits which are arranged in an inclined mode, the pressing rod 4 can move in the inclined direction of the rod channel 16 through the movement combination in two directions, and the head 41 of the pressing rod 4 can slide on the strip-shaped sliding groove 72 while moving up and down to adaptively adjust the position.
Further, it is possible that the compaction driving mechanism 6 further comprises a driving device (not shown in the figure), a power output shaft of the driving device is connected to the integrated top plate, the driving device is used for driving the integrated top plate to move up and down along the X-axis direction, and the rod channel 16 can reversely drive the head of the pressure rod 4 to move relative to the integrated top plate by means of the moment of the up and down movement of the integrated top plate due to the fact that the pressure rod 4 is inserted in the rod channel 16 when the integrated top plate moves up and down. That is, since the pot opening of the base plate 7 is upward, when the driving device drives the integrated top plate to move downward along the X-axis direction to approach the mold (i.e., when the head 41 of the pressing rod 4 moves upward along the strip-shaped sliding groove 72), the head 41 of the pressing rod 4 not only includes upward displacement along the X-axis direction but also includes outward displacement along the Y-axis direction relative to the integrated top plate, and the outward displacement along the Y-axis direction also makes room for the upward displacement along the X-axis direction. In practice, the head of the strut 4 will typically move between 0.5 mm and 2 mm relative to the integral top plate. The driving device is a driving oil cylinder, and can also be a driving motor or a driving air cylinder in other equivalent embodiments.
On the basis of the hub casting mould system, the invention also discloses a hub casting processing method, which comprises a hub casting mould, wherein a casting cavity 10 for forming a hub is arranged in the hub casting mould, and the casting cavity 10 comprises a central core cavity 11, a peripheral rim cavity 12 and a spoke cavity 13 for communicating the core cavity 11 with the rim cavity 12; a cooling medium pipe 22 is arranged on the wall body of the mold cavity close to the middle area of the spoke cavity 13, during condensation after the casting cavity 10 is poured, cooling and solidification are conducted on the middle area of the spoke cavity 13 through cooling medium in the cooling medium pipe 22 to form spoke nodules a in the cavity, and then compaction force is applied to the corner transition part 18 between the rim and the spoke to achieve feeding.
The further processing method can also be that the hub casting mould further comprises a pouring gate 14 communicated with the core cavity 11, and molten metal can be poured into the casting cavity 10 through the pouring gate 14; after the formation of the intra-cavity spoke nodules a and while applying a compressive force to the corner transitions 18 between the rim and spokes, the casting pressure at the gate 14 continues until the core solidifies.
The further processing method can also be that a rod channel 16 communicated with the casting cavity 10 is further arranged in the hub casting mould, the rod channel 16 leads to a mould corner part 15 intersected between the spoke cavity 13 and the rim cavity 12, a pressure rod 4 is arranged in the rod channel 16, the shape of the tail end face of the pressure rod 4 is matched with the shape of a corner transition part 18 between a rim and a spoke, and the compression rod 4 is pushed to apply compaction force to the corner transition part 18 between the rim and the spoke so as to realize feeding.
In a further method of manufacture, the upper central region of the upper tool 1 has an upper cavity 17, the rod channel 16 is arranged obliquely in the upper tool 1, and the rod channel 16 leads from a lower corner position of the upper cavity 17 to the tool corner 15.
The hub casting processing method has the advantages that firstly, metal in the middle area of the spoke cavity 12 is firstly solidified to form spoke nodules a through the cooling effect of the refrigerant pipe 22, the spoke nodules a can provide reverse supporting force for compression rod compaction and feeding, and the corner transition part 18 not only solves the problem of shrinkage porosity, but also greatly improves the feeding compactness and mechanical strength of a casting under the bidirectional acting force of the compression rod compaction force and the spoke nodules a; secondly, in the feeding stage, due to the existence of the spoke nodules a, compared with the feeding scheme in the prior art, feeding of the whole hub through the gate 14 is not considered, only feeding of the hub wall body around the gate 14 is considered through the gate, feeding difficulty is reduced, and material consumption is reduced.
Claims (5)
1. The improved hub casting mould system comprises a hub casting mould, wherein a casting cavity for forming a hub is arranged in the hub casting mould, and the casting cavity comprises a central core cavity, a peripheral rim cavity and a spoke cavity communicated with the core cavity and the rim cavity; the spoke structure is characterized in that a coolant pipe is arranged on a mold cavity wall body close to the middle area of a spoke cavity, and the coolant pipe is used for leading the molten metal in the spoke cavity on the side edge of the coolant pipe to be partially solidified to form a spoke node; a rod channel is further arranged in the hub casting mould and is communicated with the casting cavity through a mould corner part intersected between the spoke cavity and the rim cavity; the wheel hub is characterized by further comprising an integrated top plate, a pressure rod is movably inserted in the rod channel in a penetrating mode, the top end of the pressure rod is connected to the integrated top plate, and the shape of the tail end face of the pressure rod is matched with the corner transition position between the rim and the spoke.
2. The improved hub casting mold system of claim 1 wherein the rod channel and the pressure rod are arranged in an inclined configuration on the hub casting mold.
3. The improved hub casting mold system of claim 2 wherein the top end of the strut is slidably disposed on the integral top plate.
4. The improved hub casting mold system of claim 3 further comprising a drive means, a power output shaft of said drive means being connected to said integral top plate, said drive means for driving movement of said integral top plate and said strut.
5. The improved hub casting mold system according to any one of claims 1 to 4, further comprising a coolant conveying device, wherein the coolant conveying device is communicated with the coolant pipe, and the coolant conveying device is used for supplying cooling water or gas to the coolant pipe.
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| CN202011195975 | 2020-10-30 | ||
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| CN117718444B (en) * | 2024-02-08 | 2024-04-30 | 蓬莱三和铸造有限公司 | Casting device for mine car spoke and rim body and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH06277817A (en) * | 1993-03-29 | 1994-10-04 | Topy Ind Ltd | Low pressure casting device |
| JPH081301A (en) * | 1994-06-21 | 1996-01-09 | Toyota Motor Corp | Method for controlling flowing of molten metal |
| DE69716143T2 (en) * | 1996-01-12 | 2003-07-10 | Topy Ind | Method and device for casting a light alloy wheel |
| JP2007275973A (en) * | 2006-04-11 | 2007-10-25 | Yokohama Rubber Co Ltd:The | Gravity casting method, and gravity casting die used therefor, and air-inflated tire cast by gravity casting die |
| CN103464724A (en) * | 2013-08-22 | 2013-12-25 | 广州驭风旭铝铸件有限公司 | Casting method of wheel or wheel center disc |
| CN204735706U (en) * | 2015-06-18 | 2015-11-04 | 秦皇岛兴龙轮毂有限公司 | Aluminium wheel low pressure casting mould fixed point water -cooling structure |
| CN105499513A (en) * | 2015-12-23 | 2016-04-20 | 哈尔滨工业大学 | Device for manufacturing automobile aluminum alloy wheel hubs through liquid filling, local pressurizing and feeding and method thereof |
| CN207325912U (en) * | 2017-08-28 | 2018-05-08 | 中信戴卡股份有限公司 | A kind of low-pressure casting die of aluminium alloy wheel |
| CN108311669B (en) * | 2018-03-13 | 2019-11-19 | 中信戴卡股份有限公司 | Aluminum vehicle wheel low pressure casting secondary pressurized technique |
| CN111822672A (en) * | 2020-06-22 | 2020-10-27 | 北京航空航天大学 | Local high pressure boost and refine device and adopt device's antigravity casting equipment |
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| CN112207260B (en) | 2023-05-02 |
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