CN214263851U

CN214263851U - Compacting mechanism and applied hub casting mold system

Info

Publication number: CN214263851U
Application number: CN202022466799.7U
Authority: CN
Inventors: 简伟文; 赵海东; 吴概; 陈振明; 张振东
Original assignee: Foshan Nanhai Superband Mould Co Ltd
Current assignee: Foshan Nanhai Superband Mould Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-09-24
Anticipated expiration: 2030-10-30

Abstract

The compaction mechanism and the applied hub casting mold system comprise a compaction driving mechanism and a compression bar; the compaction driving mechanism is characterized by comprising an integrated top plate, wherein the integrated top plate comprises a base plate and a cover plate, the base plate is in a pot shape and is provided with an inclined pot wall, a pot opening of the base plate faces upwards, a plurality of strip-shaped sliding grooves which are radially arranged are arranged on the pot wall, and the strip-shaped sliding grooves are distributed in a concentric annular structure; the pressing rod is T-shaped and is provided with a head part and a rod body part, and the rod body part of the pressing rod penetrates through the strip-shaped sliding groove and extends out towards the lower part of the substrate in an outward inclined direction; the lower bottom surface of the cover plate is fixedly connected to the upper surface of the base plate in a pot bottom shape, and the head part of the pressure lever is limited between the base plate and the cover plate but can slide along the strip-shaped sliding groove under the cover plate; because the base plate is in a pot shape and is provided with the inclined pot wall, the pot opening of the base plate faces upwards, and therefore when the pressing rod moves upwards along the strip-shaped sliding groove, the pressing rod can be inserted into the obliquely arranged rod channel to be mentioned below by means of upward displacement in the direction of the axis X, Y.

Description

Compacting mechanism and applied hub casting mold system

Technical Field

The invention relates to the field of casting molds, in particular to a compaction mechanism used in a casting mold and a hub casting mold system applying the compaction mechanism.

Background

At present, the aluminum alloy hub is mainly produced by adopting a low-pressure casting process, and in order to improve the qualification rate of the manufactured finished product of the aluminum alloy hub, a cooling structure and process optimization are usually used in the casting process to solve the feeding problem of a casting, so that the shrinkage defect of the casting is reduced. Later, the casting technology is improved, and a new low-pressure casting method is invented, for example, chinese patent application No. ZL201310369926.3 discloses a method for casting a wheel or a wheel center plate, which uses a low-pressure casting method to realize that liquid metal smoothly fills a mold cavity of a casting from bottom to top, and after the filling is finished, drives an extrusion rod to perform local extrusion forming from top to bottom on a central processing hole part of a wheel core, so as to realize forced feeding of the casting in a solidification process, thereby improving the compactness and mechanical properties of the wheel or the wheel center plate, and also improving the production efficiency and the material utilization rate. However, the moving direction and the extrusion position of the extrusion mechanism in the casting mold are single, and the extrusion mechanism is only suitable for compacting in the middle area of the mold, and the R-corner is difficult to extrude, so that further improvement on the extrusion mechanism of the pressure casting mold is needed.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a compaction mechanism, which comprises a compaction driving mechanism and a compression bar; the compaction driving mechanism is characterized by comprising an integrated top plate, wherein the integrated top plate comprises a base plate and a cover plate, the base plate is in a pot shape and is provided with an inclined pot wall, a pot opening of the base plate faces upwards, a plurality of strip-shaped sliding grooves which are radially arranged are arranged on the pot wall, and the strip-shaped sliding grooves are distributed in a concentric annular structure; the pressing rod is T-shaped and provided with a head part and a rod body part, and the rod body part of the pressing rod penetrates through the strip-shaped sliding groove and extends out towards the lower part of the substrate in an outward inclined direction; the lower bottom surface of the cover plate is fixedly connected to the upper surface of the base plate in a pot bottom shape, and the head of the pressure lever is limited between the base plate and the cover plate but can slide along the strip-shaped sliding groove below the cover plate.

The compaction driving mechanism is a mechanism which is used for connecting the compression bar, can drive the compression bar to move and limits the position of the compression bar.

The integrated top plate is a supporting component of the compaction driving mechanism and comprises a base plate and a cover plate, and the base plate and the cover plate are connected so as to connect the compression bar.

The strip-shaped sliding groove is a sliding groove which is arranged in a strip shape, and the strip-shaped sliding groove is communicated with the upper space and the lower space of the substrate, so that the strip-shaped sliding groove can allow the pressure lever mentioned below to pass through and provide a sliding space in the radial direction.

The strip-shaped chutes are arranged in a concentric annular structure, which defines the relative positions of the strip-shaped chutes, and the strip-shaped chutes are all located on the same annular track on the inclined pot wall of the base plate, i.e. the strip-shaped chutes are not only arranged at intervals, but also the same parts of the strip-shaped chutes are all located on a concentric circumference, so that the strip-shaped chutes are arranged in a concentric annular structure. On the basis, it is actually defined that the pot wall region of the substrate, on which the strip-shaped sliding grooves are arranged, is located on a rotating surface with the central axis X as a reference, that is, the pot wall region on which the strip-shaped sliding grooves are arranged is rotationally symmetrically arranged, so that the strip-shaped sliding grooves are arranged in a concentric annular structure.

The pressing rod is a connecting component which is inserted and connected in the strip-shaped sliding groove, and the rod body part of the pressing rod can continue to extend in an inclined and outward mode after penetrating through the substrate, so that the pressing rod radially points to the lower space of the substrate.

The head of the pressure lever is limited between the base plate and the cover plate but can slide along the strip-shaped sliding groove under the cover plate, on one hand, a movable space for placing the head of the pressure lever is arranged between the base plate and the cover plate, and as the head and the rod body are connected together to form a T shape, the width of the head is larger than the width of the strip-shaped sliding groove, so that the head cannot pass through the strip-shaped sliding groove; in addition, the movable space of the head is communicated with the strip-shaped sliding groove and is arranged along the strip-shaped sliding groove, so that the pressure rod can slide along the strip-shaped sliding groove; further, under the limiting action of the cover plate, the compression bar cannot be separated from the upper part of the strip-shaped sliding groove; in this way, the pressure rod can form reliable sliding connection with the integrated top plate;

according to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that: because the base plate is in a pot shape and is provided with the inclined pot wall, and the pot opening of the base plate is upward, when the pressing rod moves upwards along the strip-shaped sliding groove, the upward displacement in the X-axis direction and the outward displacement in the Y-axis direction are included, so that the pressing rod can be inserted into the rod channel which is obliquely arranged as mentioned below.

In order to better enable the integrated top plate to be connected with the pressure rod, the upper part of the strip-shaped sliding groove is in a settlement pit shape to form an upper pit, the upper pit comprises a pit bottom wall, a strip-shaped through hole is formed in the pit bottom wall, the cover plate covers a notch of the upper pit, and the head of the pressure rod is limited in the upper pit and cannot be downwards separated from the strip-shaped through hole. The upper part of the strip-shaped sliding groove is the part of the strip-shaped sliding groove facing to one side of the cover plate. The space enclosed by the upper concave pit and the cover plate provides a sliding space for the head of the compression bar.

The further technical scheme can also be that the base plate and the cover plate are respectively annular. On one hand, the strip-shaped sliding chutes are favorable for forming an annular structure arrangement; on the other hand, the integrated top plate formed by combining the base plate and the cover plate may have a hollow portion through which other members pass.

The further technical scheme can also be that the base plate and the cover plate are detachably and fixedly connected together through bolts or fixedly connected together through welding. The base plate and the cover plate which are firmly connected together can facilitate the installation of the pressure rod and improve the connection stability of the integrated top plate and the pressure rod.

In order to enable driving of the integrated top plate, the compaction drive mechanism further comprises a drive device, a power output shaft of which is connected to the integrated top plate, the drive device being used for driving the integrated top plate to move.

The further technical scheme can also be that the driving device can be a driving oil cylinder, a driving motor or a driving air cylinder.

The compaction mechanism has the advantages, so that the compaction mechanism can be applied to a hub casting mold system, the hub casting mold system comprises the compaction mechanism and a hub casting mold, the hub casting mold comprises an upper mold, a lower mold and a side mold, the upper mold, the lower mold and the side mold are combined to form a casting cavity of a hub, 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 upper central area of the upper die is provided with an upper cavity, a rod channel which is matched with the pressure rod is obliquely arranged in the upper die, the rod channel starts from the upper cavity and is communicated with the casting cavity through a corner part which is intersected between the spoke cavity and the rim cavity and is positioned on the upper die, the compaction mechanism is arranged above the upper die, and the integrated top plate is positioned in the upper cavity; the pressure lever is movably inserted into the lever channel, and when the integrated top plate pushes the pressure lever to move up and down in the lever channel, the head of the pressure lever slides along the strip-shaped sliding groove at the same time to adaptively adjust the position. The head of the pressure lever can slide along the strip-shaped sliding groove at the same time to adaptively adjust the position, the pressure lever is obliquely arranged in the upper die, the pressure lever can move along the rod channel in the oblique direction, when the pressure lever moves from a first working position to the corner part from top to bottom, the head of the pressure lever can actually move in the X axis direction and the Y axis direction, and the strip-shaped sliding groove provides a sliding space in the X axis direction and the Y axis direction for the pressure lever, so that the radial position (the Y axis direction) of the pressure lever can be adaptively adjusted when the pressure lever moves up and down; therefore, the hub casting mold system can well realize the compaction operation of the corner transition part, well solve the problem of shrinkage porosity of a casting and improve the compactness and mechanical strength of the casting.

The further technical scheme can also be that the shape of the tail end face of the pressure lever is adapted to the corner transition part between the rim and the spoke. This defines that in the casting stage, when the pressure lever is in the first working position, the tail end face of the pressure lever is connected with the die wall body around the outlet of the lever channel to form a die corner part for forming the corner transition part, so that the hub cavity can be conveniently cast with the hub.

The technical scheme can also be that a refrigerant pipe is arranged on the lower die cavity wall body close to the middle area of the spoke cavity, and the refrigerant pipe is used for leading the molten metal in the spoke cavity on the side edge of the refrigerant pipe to be partially solidified to form spoke nodules. The spoke nodules can provide reverse supporting force for compression rod compaction feeding, 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 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.

Due to the above features and advantages, the present invention may be applied to a compaction mechanism and 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

1. The compaction mechanism comprises a compaction driving mechanism and a compression bar; the compaction driving mechanism is characterized by comprising an integrated top plate, wherein the integrated top plate comprises a base plate and a cover plate, the base plate is in a pot shape and is provided with an inclined pot wall, a pot opening of the base plate faces upwards, a plurality of strip-shaped sliding grooves which are radially arranged are arranged on the pot wall, and the strip-shaped sliding grooves are distributed in a concentric annular structure; the pressing rod is T-shaped and provided with a head part and a rod body part, and the rod body part of the pressing rod penetrates through the strip-shaped sliding groove and extends out towards the lower part of the substrate in an outward inclined direction; the lower bottom surface of the cover plate is fixedly connected to the upper surface of the base plate in a pot bottom shape, and the head of the pressure lever is limited between the base plate and the cover plate but can slide along the strip-shaped sliding groove below the cover plate.

2. The compactor mechanism according to claim 1 wherein the upper portion of the bar-shaped channel is shaped as a drop pit forming an upper well, the upper well includes a well bottom wall, the well bottom wall is provided with a bar-shaped through hole, the cover plate covers the notch of the upper well, and the head of the plunger is confined in the upper well and cannot fall out of the bar-shaped through hole.

3. The compaction mechanism of claim 1, wherein the base plate and cover plate are each annular.

4. The compaction mechanism of claim 1 wherein the base plate and cover plate are removably secured together by bolts or by welding.

5. The compaction mechanism of any one of claims 1 to 4, wherein the compaction drive further comprises a drive means, a power output shaft of the drive means being connected to the integral top plate, the drive means being adapted to drive the integral top plate in movement.

6. The compaction mechanism of claim 5 wherein the drive is a drive cylinder, a drive motor or a drive cylinder.

7. The hub casting mold system is characterized by comprising the compaction mechanism and a hub casting mold as claimed in any one of claims 1 to 6, wherein the hub casting mold comprises an upper mold, a lower mold and a side mold, the upper mold, the lower mold and the side mold are combined to form a casting cavity of a hub, 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 upper central area of the upper die is provided with an upper cavity, a rod channel which is matched with the pressure rod is obliquely arranged in the upper die, the rod channel starts from the upper cavity and is communicated with the casting cavity through a corner part which is intersected between the spoke cavity and the rim cavity and is positioned on the upper die, the compaction mechanism is arranged above the upper die, and the integrated top plate is positioned in the upper cavity; the pressure lever is movably inserted into the lever channel, and when the integrated top plate pushes the pressure lever to move up and down in the lever channel, the head of the pressure lever slides along the strip-shaped sliding groove at the same time to adaptively adjust the position.

8. The hub casting mold system of claim 7, wherein the trailing face of the strut is shaped to fit the corner transition between the rim and the web.

9. The hub casting mold system according to claim 7, wherein a coolant pipe is arranged on the lower cavity wall body near the middle area of the 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 solidify locally to form spoke nodules.

10. The hub casting mold system of claim 9, further comprising a coolant delivery device in communication with the coolant tube, the coolant delivery device configured to provide cooling water or gas to the coolant tube.