CN205869404U - Casting wheel hub's mould - Google Patents

Abstract

The utility model provides a casting wheel hub's mould, include mould bottom plate, lower mould, go up the mould, go up the mold core, shunt awl, cope match -plate pattern, ejector pin board, ejector pin clamp plate, first side form, second side form and pressure boost and encircle, wherein: be fixed with at least one pressure boost linkage pole on the ejector pin board, the other end of pressure boost linkage pole passes the depth groove that sets up and is connected to the pressure boost that the mould below was equipped with and encircles in the mould top, pressure boost linkage pole can be along with ejector pin board up -and -down motion, go up and to be equipped with on the mold core to near cavity input high -pressure gas with the gas outgoing's in the near cavity air duct, be equipped with connection supercharging air pipe's the pressure boost route and the discharge route of run -on outlet duct in the air duct. The utility model discloses a central gas pressurized of wheel hub casting system adoption pressurizes respectively to the casting mould with the pressor mode of machinery and has improved the quality of foundry goods, owing to cancelled the rising head, foundry goods reservation allowance and foundry goods deflection are little, have improved the yield of foundry goods.

Description

A mold for casting a wheel hub

technical field

The utility model relates to the field of casting equipment, in particular to a casting wheel hub mold, in particular to a casting wheel hub mold suitable for both gas boosting and mechanical boosting.

Background technique

Gravity casting is a commonly used method in the wheel hub casting process. It is a process of injecting molten metal, especially molten aluminum, into the mold under the gravity of the earth. The control of molten aluminum and the sealing of the mold are the keys to gravity casting. Work steps.

Common defects in gravity casting castings: mainly pinholes, pores, oxidized slag inclusions, hot cracks, looseness, etc.

The molten metal will shrink greatly during the cooling and solidification process. In order to avoid shrinkage porosity and surface depressions inside the casting, a riser will be provided on the hub for feeding. In order to make the casting fully obtain metal for feeding and reduce internal defects of the casting Generally, a full circle of ring mouth is added to the rim and the gate is used for feeding in the middle part of the hub (at the mounting plate). Even so, due to the slow cooling rate of the spoke part, the loose phenomenon is still relatively prominent, and the reject rate is as high as about 20%. Moreover, the molding process takes a long time, the efficiency is low, and the yield of the billet is low; at the same time, in order to compensate for the shrinkage of the molten metal, The riser provided on the rim part is usually relatively large, which wastes raw materials and increases the cost on the one hand, and increases the weight of the casting on the other hand.

Because there is no external pressure in metal mold gravity casting, gas will be generated inside the aluminum alloy liquid during the cooling and solidification process. These gases are difficult to discharge due to the high viscosity of the aluminum liquid. A large amount of gas stays inside the casting, forming pores, and the aluminum liquid Crystallization and solidification under no pressure will lead to difficulty in feeding. Coarse grains and uneven crystal phase structure will easily occur at hot nodes. Defects such as oxidative slag inclusion, thermal cracking, and porosity have seriously affected the airtightness and mechanical properties of the product, and reduced the authenticity rate of the product.

Utility model content

The purpose of the utility model is to provide a casting wheel hub mold which does not need a riser and improves the tensile strength and quality of the casting.

The above objects of the utility model are achieved by the technical features of the independent claims, and the dependent claims develop the technical features of the independent claims in an alternative or advantageous manner.

In order to achieve the above purpose, the utility model proposes a mold for casting a wheel hub, including a mold bottom plate, a lower mold, an upper mold, an upper mold core, a splitter cone, an upper mold plate, a ejector plate, an ejector plate, a first side mold, a second Two side molds and booster rings.

The lower mold is fixed to the mold bottom plate.

The upper mold has a substantially cylindrical structure, the upper mold core is fixed to the upper mold, and the upper mold core is located at the center of the bottom of the cylinder.

The splitter cone is fixed at the central position of the lower mold, facing the upper mold core.

The upper mold and the upper template are fixedly connected by guide pillars, and the upper template is set to be connected with the upper machine platen of the casting machine. The guide pillars are 4 columns, which are evenly distributed on the top of the upper mold and connected to the punch.

The ejector pin plate is connected with the ejector pin platen, and a through hole is provided on the ejector pin plate and the ejector pin platen, the guide post passes through the through hole, and the ejector pin plate The pressing plate of the ejector pin can slide up and down along the guide post.

The first side mold and the second side mold are respectively arranged to be connected with the oil cylinders on both sides of the casting machine, and can be molded with the lower mold and the upper mold. The first side mold, the second side mold, the lower mold, The upper mold, the splitter cone, the upper mold core and the booster ring form a closed cavity.

The two semicircular sprue cups are respectively symmetrically fixed at the gate positions of the upper ends of the first side mold and the second side mold, and the casting aluminum liquid passes through the sprue cup and the flow of the first side mold and the second side mold. channel into the closed cavity.

At least one booster ring connecting rod is fixed on the ejector pin plate, and the other end of the booster ring connecting rod passes through the deep groove provided above the upper die and is connected to the booster ring provided below the upper die. The connecting rod can move up and down along with the ejector rod plate.

The upper mold core is provided with an air passage for inputting high-pressure gas into the closed cavity and discharging the gas in the closed cavity, and the air passage is provided with a pressurization passage connected to the pressurized air pipe and a discharge passage connected to the discharge air pipe .

It should be understood that all combinations of the foregoing concepts as well as additional concepts described in more detail below may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent. Additionally, all combinations of claimed subject matter are considered a part of the inventive subject matter of the present disclosure.

The foregoing and other aspects, embodiments and features of the teachings of the present invention can be more fully understood from the following description when taken in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and/or beneficial effects of the exemplary embodiments, will be apparent from the following description, or learned by practice of specific embodiments according to the teachings of the present invention.

Description of drawings

The figures are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like reference numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of the various aspects of the invention will now be described by way of example with reference to the accompanying drawings, in which:

Fig. 1 is a structural schematic diagram of a specific embodiment of a mold for casting a wheel hub.

Fig. 2 is a schematic view of the structure of the mold for casting the hub after removing the molds on both sides.

Fig. 3 is a structural schematic diagram of a booster ring.

detailed description

In order to better understand the technical content of the utility model, specific embodiments are given and described as follows in conjunction with the accompanying drawings.

Aspects of the invention are described in this disclosure with reference to the accompanying drawings, in which a number of illustrated embodiments are shown. The embodiments of the present disclosure are not necessarily intended to include all aspects of the present invention. It should be understood that the various concepts and embodiments described above, as well as those concepts and embodiments described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in the present invention are not Not limited to any implementation. In addition, some aspects disclosed in this utility model can be used alone or in any appropriate combination with other aspects disclosed in this utility model.

As shown in Figures 1 and 2, according to an embodiment of the present invention, a mold for casting a wheel hub includes a mold bottom plate 1, a lower mold 2, an upper mold 7, an upper mold core 28, a splitter cone 3, an upper mold plate 12, a top Rod plate 9 , ejector rod pressing plate 11 , first side mold 4 , second side mold 20 and booster ring 19 .

The lower mold 2 is fixed to the mold bottom plate 1 .

The upper mold 7 has a substantially cylindrical structure, the upper mold core 28 is fixed to the upper mold 7, and the upper mold core 28 is located at the center of the bottom of the cylinder.

The splitter cone 3 is fixed at the central position of the lower mold 2, facing the upper mold core 28.

The upper mold 7 and the upper template 12 are fixedly connected by guide pillars 8, and the upper template 12 is set to be connected with the upper machine platen of the casting machine. The guide pillars 8 are four columns, which are evenly distributed on the upper The top of mold 7 and is connected to upper mold 7.

The ejector pin plate 9 is connected with the ejector pin platen 11, and a through hole penetrating through the ejector pin plate 9 and the ejector pin platen 11 is provided on the ejector pin plate 9 and the ejector pin platen 11, and the guide post passes through the through hole , the ejector rod plate and the ejector rod pressing plate can slide up and down along the guide post 8.

The first side mold 4 and the second side mold 20 are respectively arranged to be connected with the oil cylinders on both sides of the casting machine, and can be molded with the lower mold 2 and the upper mold 7. The first side mold 4 and the second side mold The mold 20, the lower mold 2, the upper mold 7, the splitter cone 3, the upper mold core 28 and the pressurizing ring 19 form a closed cavity.

The two semicircular sprue cups 6 are symmetrically fixed on the gate positions on the upper ends of the first side mold 4 and the second side mold 20 respectively, and the casting aluminum liquid passes through the sprue cup 6 and the first side mold 4 and the second side mold 20. The runners of the two side molds 20 are injected into the closed cavity.

At least one pressurized ring connecting rod 16 is fixed on the ejector plate 9, and the other end of the pressurized ring connected rod 16 passes through the deep groove provided above the upper die 7 and is connected to the pressurized ring 19 provided below the upper die 7 , the booster ring connecting rod 16 can move up and down along with the ejector plate 9 .

The upper mold core 28 is provided with an air passage for inputting high-pressure gas to the closed cavity and discharging the gas in the closed cavity. The air passage is provided with a pressurization passage connected to a pressurized air pipe and a discharge passage connected to an exhaust pipe. path.

As shown in Figure 1 and Figure 2, the component marked 5 in the figure is a cold iron, which is used to realize rapid and forced cooling of the gate position.

As mentioned above, the pressurized casting mold of the present invention adopts the combination of air pressurization and mechanical pressurization. The pressurization ring 19 moves downward under the action of the pressurization cylinder of the casting machine, and the pressurization ring 19 squeezes the closed type The aluminum liquid in the outer edge of the cavity squeezes the outer edge of the casting downward, which improves the density of the outer edge of the casting and the quality of the casting. At the same time, the high-pressure gas pressurizes the middle part of the casting through the air channel, so that The pressure is evenly distributed on the casting, which ensures the consistency of the entire casting structure; it overcomes the defect that the traditional gravity casting mold needs to be provided with a riser on the mold, so that the reserved machining allowance of the casting and the deformation of the casting are small, and the processing efficiency is improved. , reducing the reject rate of castings.

As shown in Figure 1 and Figure 3, six booster ring connecting rods 16 are fixed on the ejector rod plate, and the booster ring connecting rods 16 are evenly distributed on the ejector rod plate, and the booster ring connecting rods 16 The other end of the other end is connected to the booster ring 19 by threads, so that the booster ring 19 is evenly stressed, ensuring the force balance of the booster ring 19 acting on the outer edge of the casting, and improving the quality of the casting at the outer edge of the casting.

As shown in Figures 1 and 2, a first bush 10 is provided in the through hole, and the ejector plate 9 and the ejector plate 11 connected together can slide up and down along the guide post 8 through the first bush 10 , reduce the friction between the ejector pin plate and the ejector pin platen and the guide post, and improve the life of the mold.

As shown in Figure 1, a second bushing 18 is arranged in the deep groove provided on the upper part of the upper mold 7, and a bushing pressing plate 17 is arranged on the second bushing 18, and the booster ring connecting rod 16 It can slide up and down in the second bushing 18, which reduces the direct contact between the booster ring connecting rod 16 and the deep groove provided on the top of the upper die 7, and improves the service life of the die.

As shown in Figure 1, a boost control valve 23 is provided in the pressurization passage, and the high-pressure gas is input into the pressurization control valve 23 through the intake pipe 22; a gas discharge control valve 24 is provided in the discharge passage, and the closed type The gas in the cavity is discharged through the exhaust pipe 25 .

As shown in Figure 1, the ejector plate flange 15 is provided on the ejector plate 11, and the ejector plate flange 15 is connected with the oil cylinder flange 13 through a C-type clamp 14, and the oil cylinder flange 13 is connected with the casting The pressurized oil cylinder of the casting machine is threadedly connected, so that the ejector pin pressure plate 11 is connected reliably with the pressurized oil cylinder of the casting machine.

As shown in Figure 1, the bottom of the first side mold 4 and the second side mold 20 and the upper part of the mold bottom plate 1 are respectively provided with a keyway, and a guide key 21 is arranged in the keyway, and the guide key 21 is fixed to the On the mold bottom plate 1, the guide key 21 enables the first side mold 4 and the second side mold 20 to move back and forth along the guide key 21, so that the movement of the two side molds is stable, and the reliable contact of the mold surfaces of the two side molds is ensured. The airtightness of the closed cavity.

As shown in Figures 1 and 2, an air pipe connector 26 that runs through the upper mold core 28 is provided in the air channel, and an air plug 27 is provided at the bottom of the air pipe connector 26, and a hole that allows air to pass is provided on the air plug 27, so The air plug 27 and the air pipe joint 26 are interference fit, so that the air plug 27 and the air pipe joint 26 can be reliably connected, and the air plug 27 prevents the aluminum liquid entering the closed cavity from directly contacting the air pipe, so that the aluminum liquid will not block the air pipe, ensuring The reliability of air pressure boosting is improved.

As shown in Figure 3, an exhaust mechanism for discharging the gas at the outer edge of the closed cavity of the mold is provided on the pressurized ring 19, the exhaust mechanism is an exhaust plug 29, and the exhaust plug 29 runs through the pressurized ring 19 , so that the gas that seals the outer edge of the cavity can be discharged through the exhaust plug 29, which improves the casting quality of the outer edge of the casting.

A method of casting a wheel hub, the method comprising the following steps:

Step 1, mold closing, aluminum liquid is injected into the closed cavity through the sprue cup 6;

Step 2, the air in the closed cavity is discharged through the air channel;

Step 3. After the pouring is completed, pass water to cool, so that the aluminum liquid at the casting port can be solidified quickly, and the mold cavity and flow channel are blocked;

Step 4: Input high-pressure gas to the air channel provided on the upper mold core 28 to apply pressure to the aluminum liquid in the closed cavity, and at the same time make the pressurized ring 19 slide down and squeeze closed under the action of the pressurized oil cylinder of the casting machine Aluminum liquid on the outer edge of the cavity;

Step 5: After the casting is solidified, the high-pressure gas in the closed cavity is discharged through the air channel on the upper mold core 28, and the mold is opened to take out the casting.

As preferably, in conjunction with Fig. 1, shown in Fig. 2, the method for the closed cavity pressurization in the mold of casting hub comprises the following steps:

Step 1. Close the pressurization control valve 23, open the gas discharge control valve 24, and inject the aluminum liquid into the closed cavity through the sprue cup 6;

Step 2, the air in the closed cavity is discharged through the gas discharge control valve 24; the gas on the outer edge of the closed cavity is discharged through the exhaust plug 29;

Step 3. After the pouring is completed, pass water to cool, so that the aluminum liquid at the casting port can be solidified rapidly, and the mold cavity and flow channel are blocked;

Step 4, the gas discharge control valve 24 is closed, the boost control valve 23 is opened, the high-pressure gas enters the closed cavity through the boost control valve 23 and the air plug 27, and exerts pressure on the aluminum liquid in the closed cavity, and the pressurized ring 19 is cast Under the action of the pressurized oil cylinder of the machine, it slides down and squeezes the aluminum liquid on the outer edge of the closed cavity;

Step 5: After the liquid aluminum is solidified, the pressurization control valve 23 is closed, the gas discharge control valve 24 is opened, and the gas in the closed cavity is discharged through the exhaust pipe 25 .

In conjunction with Fig. 1, shown in Fig. 2, a kind of mold of casting wheel hub of the present utility model, its connection mode is as follows:

The lower mold 2 is bolted to the mold bottom plate 1 .

The mold bottom plate 1 is bolted to the bottom plate of the die-casting machine.

The upper mold 7 is fixedly connected with the upper template 12 through the guide post 8 .

The upper template 12 is connected with the top plate of the casting machine by T-shaped bolts.

The ejector rod plate 9 is bolted to the ejector rod pressing plate 11, and the first bush 10 slides up and down between this structure and the guide post 8.

The first side mold 4 and the second side mold 20 are connected with the oil cylinders on both sides of the casting machine by bolts.

Upper mold core 28 is fixed with upper mold 7 bolts.

The splitter cone 3 is fixed with the lower mold 2 by bolts.

The booster ring connecting rod 16 is threadedly connected with the booster ring 19 .

The sprue cup 6 is respectively connected with the first side mold 4 and the second side mold 20 by bolts.

As shown in Figure 1 and Figure 2, the mold opening movement mode is as follows:

The oil cylinders on both sides of the machine platform pull the first side mold 4 and the second side mold 20 outwards.

The upper plate of the machine platform rises, and moves upward to the set knocking height with the upper mold 7 and the casting blank wrapped outside it through the upper template 12 and the guide column 8.

The booster cylinder of the casting machine pushes the ejector pin plate 11 and the ejector pin plate 9 downwards to move, and the booster ring 19 moves downward with the ejector pin plate 9 to eject the casting blank.

As shown in Figure 1 and Figure 2, the mold clamping movement mode is as follows:

The oil cylinders on both sides of the machine table push the first side mold 4 and the second side mold 20 inward until the mold surfaces of the two side molds are completely attached.

The upper plate of the machine table drives the upper mold plate 12 and the guide column 8 to move downward with the upper mold 7 until the mold surface of the upper mold 6 and the lower mold 1 are completely attached.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the utility model belongs can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

Claims (9)

1. the mould of a casting hub, it is characterised in that include die bottom plate (1), lower mold (2), upper mold (7), upper mold core (28), spreader (3), cope match-plate pattern (12), mandrel plate (9), push rod pressing plate (11), the first side form (4), the second side form (20) and increasing Pressure ring (19), wherein:

Described include that lower mold (2) and die bottom plate (1) are fixed；

Described upper mold (7) has substantially barrel-shaped structure, and described upper mold core (28) is fixed with upper mold (7), and this upper mold core (28) is positioned at The middle position at the cylinder end；

Described spreader (3) is fixed on the middle position of lower mold (2), just to upper mold core (28)；

Being connected by guide pillar (8) is fixing between described upper mold (7) with cope match-plate pattern (12), this cope match-plate pattern (12) is configured to and casting The upper machine bench of machine connects, and described guide pillar (8) is 4 columns, and it is evenly distributed on the top of upper mold (7) and is connected to upper mold (7)；

Described mandrel plate (9) links together with push rod pressing plate (11), is provided with and runs through on mandrel plate (9) with push rod pressing plate (11) Mandrel plate (9) and the through hole of push rod pressing plate (11), described guide pillar passes through hole, and described mandrel plate can be along leading with push rod pressing plate Post (8) slides up and down；

Described first side form (4), the second side form (20) are respectively arranged to be connected with the oil cylinder of casting machine both sides, and can be with described Lower mold (2), upper mold (7) matched moulds, the first side form (4), the second side form (20), lower mold (2), upper mold (7), spreader (3), upper mold core (28) and pressurized ring (19) formed near closed hollow ring；

The semicircular cup of said two (6) is fixed on the first side form (4) and the second side form (20) upper end with being respectively symmetrically Gate location, casting aluminum liquid injects described enclosed type by the runner of cup (6) and the first side form (4) and the second side form (20) Chamber；

Being fixed with at least one pressurized ring connecting rod (16) on described mandrel plate (9), the other end of pressurized ring connecting rod (16) is through upper The depth groove that mould (7) is provided above is connected on the pressurized ring (19) that upper mold (7) lower section is arranged, and described pressurized ring connecting rod (16) can Along with mandrel plate (9) moves up and down；

Described upper mold core (28) is provided with near closed hollow ring input gases at high pressure with by the air of the gas discharge near closed hollow ring Passage, is provided with in described air duct and connects the supercharging path of supercharging trachea and connect the drain passageway discharging trachea.

The mould of casting hub the most according to claim 1, it is characterised in that be provided with the second lining in described depth groove (18), described second lining (18) is provided with lining pressing plate (17), and described pressurized ring connecting rod (16) can be in the second lining (18) Slide up and down.

The mould of casting hub the most according to claim 1, it is characterised in that be provided with the first lining in described through hole (10) mandrel plate (9) linked together described in, can be done along guide pillar (8) by the first lining (10) with push rod pressing plate (11) Lower slider.

The mould of casting hub the most according to claim 1, it is characterised in that be provided with supercharging control in described supercharging path Valve processed, is provided with gas and discharges control valve in described drain passageway.

The mould of casting hub the most according to claim 1, it is characterised in that be provided through in described air duct The gas-tpe fitting (26) of core rod, the bottom of gas-tpe fitting (26) is provided with vent plug (27), and described vent plug (27) is provided with allows air The hole passed through.

The mould of casting hub the most according to claim 1, it is characterised in that described pressurized ring is provided with aerofluxus on (19) Mechanism is for discharging the air of near closed hollow ring outer rim.

The mould of casting hub the most according to claim 6, it is characterised in that described exhaust gear is venting plug (29), This venting plug (29) runs through pressurized ring (19).

The mould of casting hub the most according to claim 1, it is characterised in that described first side form (4) and the second side form (20) bottom and die bottom plate (1) top are respectively equipped with keyway, are provided with feather key (21), described feather key in described keyway (21) it is secured by bolts on die bottom plate (1).

The mould of casting hub the most according to claim 5, it is characterised in that described vent plug (27) and gas-tpe fitting (26) Interference fit.