Hub side die water-cooling die

Abstract

The utility model relates to the technical field of hub manufacturing, in particular to a hub side die water-cooling die. The utility model discloses a hub side die water-cooling die which comprises a side die body, a water-cooling mechanism, a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are respectively communicated with the water-cooling mechanism, a cooling boss is arranged on the portion, to be subjected to water cooling, of the back side of a cavity of the side die body, and a cooling cavity is formed in the cooling boss. The water cooling mechanism is arranged on the side die body, a water inlet pipe extends into the cooling cavity, an assembly cavity is formed in an opening of the cooling cavity, the axial section size of the assembly cavity is larger than that of the cooling cavity, the water cooling mechanism comprises a water cooling connector, and the outer surface of the water cooling connector is in threaded connection with the inner wall of the assembly cavity. And the water cooling joint is welded with the opening of the assembly cavity. The water dripping device has the advantages that the sealing performance between the clamping sleeve joint and the cooling rod can be ensured, so that water dripping is carried out on a hub in a cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of hub manufacturing, in particular to a water-cooled die for the rim of a hub. Background Art

[0002] Chinese Patent with the application number 202010559600.7 discloses a point-type direct water-cooled hub die, which includes a rim die distributed in a ring shape and a cavity formed by surrounding the rim die. Cooling rods are arranged on the outer side wall of the rim die through through holes, and the cooling rods are connected to a water-cooling device. The water-cooling device is circumferentially distributed to perform multi-point direct water-cooling on the hub in the cavity; the water-cooling device includes a ferrule joint and a discharge pipe hermetically clamped to the ferrule joint. An input pipe is sleeved in the discharge pipe. The clamping method of the ferrule joint and the discharge pipe makes the water-cooling device easy to disassemble and install, and also convenient for subsequent internal cleaning. The ferrule joint is hermetically connected to the cooling rod.

[0003] In the above technical solution, one end of the ferrule joint is hermetically connected to the cooling rod, and then the discharge pipe sleeved with the input pipe is clamped to the tail of the ferrule joint to perform multi-point direct water-cooling on the hub in the cavity. Although the clamping method of the ferrule joint and the discharge pipe makes the water-cooling device easy to disassemble and install, when the temperature of the molten aluminum in the cavity is transmitted to the cooling rod, the cooling water will be heated into water vapor, resulting in pressure acting on the connections between the ferrule joint and the cooling rod and the discharge pipe respectively. In the above technical solution, the connection between the ferrule joint and the cooling rod is extremely prone to cracking under pressure, resulting in cooling water leakage, and the clamping of the ferrule joint and the discharge pipe also cannot guarantee the sealing performance at the clamping position, which will affect the water-cooling effect after long-term use. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a water-cooled die for the rim of a hub that can ensure the sealing performance between the ferrule joint and the cooling rod, so as to perform point water-cooling on the hub in the cavity.

[0005] To achieve the above purpose, the utility model discloses a water-cooled die for the rim of a hub, which includes a rim die body, a water-cooling mechanism, a water inlet pipe and a water outlet pipe respectively communicated with the water-cooling mechanism. A cooling boss is arranged at the water-cooled part on the back side of the cavity of the rim die body, and a cooling cavity is arranged in the cooling boss. The water-cooling mechanism is arranged on the rim die body and the water inlet pipe extends into the cooling cavity. An assembly cavity is arranged at the opening of the cooling cavity, and the axial cross-sectional dimension of the assembly cavity is larger than that of the cooling cavity. The water-cooling mechanism includes a water-cooling joint, and the outer surface of the water-cooling joint is threadedly connected with the inner wall of the assembly cavity. The water-cooling joint is welded to the opening of the assembly cavity. When the water-cooling joint is installed in the assembly cavity, an inclined surface fit is formed between the thread of the water-cooling joint and the thread in the assembly cavity.

[0006] First, the side die body is processed by precision machining. When assembling the water-cooled joint, cooling cavities and assembly cavities corresponding to the root parts of the hub spokes one by one are machined through CNC machining and drilling and tapping. The external surface thread of the water-cooled joint is threadedly connected with the thread in the assembly cavity, and then the water-cooled joint is welded to the opening of the assembly cavity. When the temperature of the molten aluminum in the hub cavity is transferred to the cooling water in the cooling cavity, even if the cooling water is heated into water vapor, the inclined surface fit formed between the thread of the water-cooled joint and the thread in the assembly cavity can resist the pressure of the heated water vapor. The cooling water is continuously supplied to the cooling cavity through the circulating water path formed by the water inlet pipe and the water outlet pipe for cooling according to the water-cooled starting time set by the control program. When the cooling water just contacts the high-temperature cooling cavity, a large amount of bubbles and water vapor will be generated, generating pressure on the entire circulating water path and the cooling cavity. The weld layer at the opening of the water-cooled joint and the assembly cavity can secondary seal the cooling water and water vapor in the cooling cavity, ensuring the sealing effect at the opening of the water-cooled joint and the assembly cavity. After the water passing time reaches the set value, the water supply is stopped. The control program controls the water-air conversion on-off valve to close the water path channel and connect the air path channel. Then the control program starts air cooling, and the air blows away the water in the entire circulating water path such as the water inlet pipe and the water outlet pipe, avoiding affecting the processes such as the filling of the next hub casting.

[0007] In the present utility model, the inclined surface fit is formed between the thread of the water-cooled joint and the thread in the assembly cavity. Compared with the existing way of making the water-cooled joint and the inner wall of the assembly cavity in interference fit and realizing the inclined surface fit, while being able to resist the pressure of the heated water vapor, the machining precision of the assembly cavity is reduced. And by forming an inclined surface fit between each section of the thread of the water-cooled joint and the thread in the assembly cavity, a sealing effect superior to that of the interference fit between the water-cooled joint and the inner wall of the assembly cavity and realizing the inclined surface fit is achieved, improving the sealing effect on the heated cooling water and water vapor. The present utility model has the advantage of being able to ensure the sealing performance between the ferrule joint and the cooling rod, thereby spot-cooling the hub in the cavity.

[0008] Preferably, the water-cooled joint includes a threaded section and an assembly section along the axial direction. The threaded section of the water-cooled joint is used for threaded connection with the inner wall of the assembly cavity. The assembly section of the water-cooled joint has a hexagonal nut structure, and the assembly section of the water-cooled joint is located outside the assembly cavity.

[0009] The threaded section and the assembly section of the water-cooled joint along the axial direction are integrally designed. The assembly section located outside the assembly cavity facilitates screwing the threaded section of the water-cooled joint into the assembly cavity.

[0010] Preferably, the water-cooling mechanism further includes a manifold for connecting with the water-cooled joint. The water inlet pipe and the water outlet pipe are respectively connected to the water inlet and outlet of the manifold. The manifold includes a first joint and a second joint. A groove for cooperating with the head of the second joint is provided at the tail of the first joint.

[0011] Compared with the method of setting multiple separate circulating water channels corresponding to the cooling cavities, integrating the circulating water channels on each side die body through a three-way manifold reduces the space occupied by water pipes.

[0012] Preferably, threaded portions are provided at both axial ends of the first joint along the axial direction of the water-cooled joint. The first joint is threadedly connected to the tail of the water-cooled joint through the threaded portion at the front end, and the first joint is threadedly connected to the front end of the second joint through the threaded portion at the rear end.

[0013] By setting the connection between the first joint and the second joint to be threaded, it is convenient to disassemble and assemble the second joint and the first joint, so as to facilitate cleaning the scale generated in the water inlet pipe and the drain pipe. The thread between the first joint and the second joint can also ensure the stability of the connection between the first joint and the second joint and the sealing performance of the connection.

[0014] Preferably, a nut is fixedly provided on the outer circumferential surface of the first joint, and the nut is located between the threaded portions at both axial ends of the first joint.

[0015] The nut facilitates the assembly of the first joint and the water-cooled joint.

[0016] Preferably, a sealing washer is provided between the assembly section of the nut and the water-cooled joint. The sealing washer is sleeved on the front end of the first joint, and the first joint and the water-cooled joint are secondarily sealed through the sealing washer to ensure the sealing effect on the circulated cooling water.

[0017] The utility model can form an inclined surface fit between each thread of the water-cooled joint and the thread in the assembly cavity, achieving a sealing effect superior to the interference fit between the water-cooled joint and the inner wall of the assembly cavity and realizing the inclined surface fit. It has the advantages of ensuring the sealing performance between the ferrule joint and the cooling rod, thereby dotting water on the hub in the mold cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a partial cross-sectional view of the utility model after installing the water-cooled joint.

[0020] Figure 3 It is a partial cross-sectional view of the utility model after installing the three-way manifold.

[0021] Figure 4 It is an exploded structural diagram of the three-way manifold of the utility model.

[0022] In the figure: 11, side die body; 12, water inlet pipe; 13, water outlet pipe; 14, cooling cavity; 15, assembly cavity; 16, water-cooled joint; 161, threaded section; 162, assembly section; 17, welding layer; 18, sealing washer; 20, nut; 21, manifold; 211, first joint; 212, second joint. Detailed implementation mode

[0023] The following further describes the present utility model according to the accompanying drawings and specific embodiments.

[0024] As Figure 1 shown, this embodiment discloses a water-cooled die for a wheel hub side die, including a side die body 11, a water-cooling mechanism, a water inlet pipe 12 and a water outlet pipe 13 respectively communicated with the water-cooling mechanism. A cooling cavity 14 is provided in the side die body 11. The water-cooling mechanism is arranged on the side die body 11 and located at the cooling cavity 14. An assembly cavity 15 is provided at the opening of the cooling cavity 14. The axial cross-sectional dimension of the assembly cavity 15 is larger than that of the cooling cavity 14. The water-cooling mechanism includes a water-cooled joint 16 and a manifold used for connecting with the water-cooled joint 16. The water-cooled joint 16 includes a threaded section 161 and an assembly section 162 along the axial direction. The assembly section 162 of the water-cooled joint 16 is located outside the assembly cavity 15. The threaded section 161 and the assembly section 162 of the water-cooled joint 16 along the axial direction are integrally designed. The threaded section 161 of the water-cooled joint 16 is used for threaded connection with the inner wall of the assembly cavity 15. When the water-cooled joint 16 is installed in the assembly cavity 15, an inclined surface fit is formed between the threaded section 161 of the water-cooled joint 16 and the thread in the assembly cavity 15. The assembly section 162 of the water-cooled joint 16 has a hexagonal nut-shaped structure, which is convenient for screwing the threaded section 161 of the water-cooled joint 16 into the assembly cavity 15. The water-cooled joint 16 is welded to the opening of the assembly cavity 15. The welding layer 17 between the water-cooled joint 16 and the opening of the assembly cavity 15 can perform secondary sealing on the cooling water and water vapor in the cooling cavity 14, ensuring the sealing effect between the water-cooled joint 16 and the opening of the assembly cavity 15.

[0025] As Figure 2As shown in the figure, the water inlet pipe 12 and the water outlet pipe 13 are respectively connected to the inlet and outlet of the manifold and sealed by welding. The manifold 21 includes a first joint 211 and a second joint 212. The tail of the first joint 211 is provided with a groove for mating with the arc-shaped raised head inside the second joint 212. The groove at the tail of the first joint 211 mates with the arc-shaped protrusion inside the head of the second joint 212. Threaded portions are provided at both axial ends of the first joint 211 along the axis of the water-cooled joint 16. The first joint 211 is threadedly connected to the tail of the water-cooled joint 16 through the threaded portion at the front end, and the first joint 211 is threadedly connected to the front end of the second joint 212 through the threaded portion at the rear end. A nut 20 is fixedly provided on the outer cylindrical surface of the first joint 211. The nut 20 is located between the two threaded portions of the first joint 211. A sealing washer 18 sleeved on the first joint 211 is provided between the nut 20 and the fitting section 162 of the water-cooled joint 16. The first joint 211 is assembled and fastened to the water-cooled joint 16 by rotating the nut 20.

[0026] As shown by Figure 3 the figure, first, the side die body 11 is machined by precision machining. When the water-cooled joint 16 needs to be assembled, cooling cavities 14 and fitting cavities 15 corresponding to the root parts of the wheel hub spokes are machined by CNC machining and drilling and tapping. The outer surface thread of the water-cooled joint 16 is threadedly connected to the fitting cavity 15, and then the water-cooled joint 16 is welded to the opening of the fitting cavity 15 to form a weld layer 17. When the temperature of the molten aluminum in the wheel hub cavity is transferred to the cooling water in the cooling cavity 14, even if the cooling water is heated into water vapor, the inclined surface fit formed between the threaded section 161 of the water-cooled joint 16 and the thread in the fitting cavity 15 can resist the pressure of the heated water vapor. Rotate the nut 20 on the outer cylindrical surface of the first joint 211 to threadedly connect the first joint 211 to the tail of the water-cooled joint 16 through the threaded portion at the front end, and threadedly connect the second joint 212 to the first joint 211 through the threaded portion at the rear end through the thread at the front end. At this time, the water inlet pipe 12 and the water outlet pipe 13 are connected through the second joint 212, the first joint 211, the water-cooled joint 16 and the cooling cavity 14, and then form a circulating water path flowing through the cooling cavity 14, and the cooling water and water vapor in the cooling cavity 14 are cooled through the circulating water path formed by the water inlet pipe 12 and the water outlet pipe 13. A water-air conversion on-off valve is provided at the front end of the water inlet pipe to control the water flow and ventilation conditions of the water inlet pipe.

Claims

1. A water-cooled mold for a wheel hub side mold, comprising a side mold body, a water-cooling mechanism, a water inlet pipe and a water outlet pipe respectively communicated with the water-cooling mechanism. A cooling boss is arranged at a water-cooling part on the back side of the cavity of the side mold body, and a cooling cavity is formed in the cooling boss. The water-cooling mechanism is arranged on the side mold body and the water inlet pipe extends into the cooling cavity. It is characterized in that: An assembly cavity is provided at the opening of the cooling cavity. The axial cross-sectional dimension of the assembly cavity is larger than that of the cooling cavity. The water cooling mechanism includes a water cooling joint. The outer surface of the water cooling joint is threadedly connected to the inner wall of the assembly cavity, and the water cooling joint is welded to the opening of the assembly cavity. When the water cooling joint is installed in the assembly cavity, an inclined surface fit is formed between the thread of the water cooling joint and the thread in the assembly cavity.

2. The water-cooled mold for the hub side mold according to claim 1, wherein: The water cooling joint includes a threaded section and an assembly section in the axial direction. The threaded section of the water cooling joint is used for threaded connection with the inner wall of the assembly cavity. The assembly section of the water cooling joint has a hexagonal nut structure, and the assembly section of the water cooling joint is located outside the assembly cavity.

3. A hub side die water-cooled mold according to claim 1 or 2, characterized in that: The water cooling mechanism further includes a three-way manifold for connecting with the water cooling joint. The inlet pipe and the outlet pipe are respectively connected to the water inlet and outlet of the three-way manifold. The three-way manifold includes a first joint and a second joint. A groove for cooperating with the head of the second joint is provided at the tail of the first joint.

4. The water-cooled mold for the wheel hub side mold according to claim 3, characterized in that: Threaded portions are provided at both axial ends of the first joint along the axial direction of the water cooling joint. The first joint is threadedly connected to the tail of the water cooling joint through the threaded portion at the front end, and the first joint is threadedly connected to the front end of the second joint through the threaded portion at the rear end.

5. The water-cooled mold for the wheel hub side mold according to claim 4, wherein: A nut is fixedly provided on the outer circumferential surface of the first joint, and the nut is located between the threaded portions at both axial ends of the first joint.

6. The water-cooled mold for the hub side mold according to claim 5, characterized in that: A sealing washer is provided between the nut and the water cooling joint, and the sealing washer is sleeved on the front end of the first joint.

Images