Heating and cooling structure for low-pressure casting hub mold

Abstract

The utility model discloses a heating and cooling structure for a low-pressure casting hub mould, which comprises a hub upper mould and a hub side mould, the hub upper mould and the hub side mould are assembled, a rim forming cavity is formed between the hub upper mould and the hub side mould, a combined ring body piece is fixed on the inner side wall of the middle part of a side plate part of the hub upper mould, a plurality of heating rods are inserted into the combined ring body piece, and the heating rods are fixed on the inner side wall of the middle part of the side plate part of the hub upper mould. And a plurality of cooling drain holes are formed in the combined ring body piece. The combined ring body part is fixed on the inner side wall of the middle part of the side plate part of the hub upper die, a plurality of heating rods are inserted into the combined ring body part, and cooling drain holes are formed, so that molten aluminum of a rim part can be heated during forming, normal flowing and filling of the molten aluminum are ensured, and the casting effect is improved; water liquid flows through the cooling water flowing holes to achieve rapid solidification, the problems of hot cracks, deformation and the like at the rim are solved, and therefore the size precision and the surface quality of the hub are improved, and the problem of shrinkage porosity at the rim is basically avoided.

Description

Technical field:

[0001] The utility model relates to the technical field of wheel hub casting equipment, and more particularly to a heating and cooling structure for a low-pressure casting wheel hub mold. Background technology:

[0002] Lightweighting has become a key goal for improving automotive performance, enhancing energy efficiency, enhancing safety, and promoting environmental protection. Wheels, as a crucial component of a vehicle, have a weight that directly impacts the overall vehicle's energy efficiency. To reduce wheel weight, customers often prioritize reducing the thickness of the rim. However, this reduction in wall thickness compromises the flow of molten aluminum, affecting both appearance and performance.

[0003] During casting, the existing wheel hub is composed of an upper die, multiple side dies and a bottom die which are pressed against each other to form a wheel hub molding cavity. The rim portion in the molding cavity is relatively thin, that is, the upper and lower ends are thicker and the middle section is very thin.

[0004] The current conventional design is to set insulation cotton on the outer wall surface of the rim part of the side mold and the inner wall of the hub part of the side plate of the upper mold to increase the mold temperature, and additionally increase the processing allowance of the product to increase the aluminum liquid channel, thereby ensuring the fluidity of the aluminum liquid. However, the insulation effect of the insulation cotton is limited, and the temperature drops significantly, resulting in poor aluminum liquid flow in the forming cavity at the rim part. Shrinkage is still prone to form at the rim, which greatly reduces the qualified product rate. In addition, the increased processing allowance at the rim increases the manufacturing cost. Utility model content:

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a heating and cooling structure for a low-pressure casting wheel hub mold, in which a combined ring body is fixed on the middle inner wall of the side plate portion of the wheel hub upper mold, a plurality of heating rods are inserted into the combined ring body and cooling water holes are formed, so that the aluminum liquid in the rim part can be heated during molding, ensuring the normal flow and filling of the aluminum liquid and improving the casting effect; during solidification, water flows through the cooling water holes to achieve rapid solidification, avoiding problems such as thermal cracks and deformation at the rim, thereby improving the dimensional accuracy and surface quality of the wheel hub and making it possible to basically avoid shrinkage problems at the rim.

[0006] The solution of the utility model to solve the technical problem is:

[0007] A heating and cooling structure for a low-pressure casting hub mold includes a hub upper mold and a hub side mold. The hub upper mold and the hub side mold are assembled to form a rim molding cavity between the two. A combined ring body is fixed on the middle inner wall of the side plate portion of the hub upper mold, and multiple heating rods are inserted into the combined ring body. Multiple cooling water holes are formed on the combined ring body.

[0008] The outer side wall of the combined ring body is in close contact with the middle inner side wall of the side plate portion of the wheel hub upper mold.

[0009] The top surface of the combined ring body is formed with multiple downward extending oblique holes, the heating rod is inserted into the corresponding oblique holes, the outer wall of the heating rod is close to the inner wall of the corresponding oblique hole, and the heating rod is close to the middle inner wall of the side plate part of the hub upper mold.

[0010] Thermocouples are provided above and below the combined ring body at the heating rod, and the sensing ends of the thermocouples are in contact with the inner side walls of the side plates of the wheel hub upper mold.

[0011] The sensing end of the thermocouple is inserted into a positioning recess formed on the middle inner side wall of the side plate portion of the wheel hub upper mold.

[0012] Cooling water holes are formed on the upper and lower parts of the inner portion of the assembled ring body at one side away from the side plate portion of the hub upper mold.

[0013] The outstanding effects of the utility model are:

[0014] Compared with the existing technology, it has a combined ring body fixed on the middle inner wall of the side plate part of the hub upper mold, multiple heating rods are inserted into the combined ring body and cooling water holes are formed, so that the aluminum liquid in the rim part can be heated during molding, ensuring the normal flow and filling of the aluminum liquid and improving the casting effect. During solidification, water flows through the cooling water holes to achieve rapid solidification, avoiding problems such as thermal cracks and deformation at the rim, thereby improving the dimensional accuracy and surface quality of the hub, so that there is basically no shrinkage problem at the rim. Description of the drawings:

[0015] Figure 1 It is a partial structural diagram of the utility model;

[0016] Figure 2 It is a partial top view of the combined ring body of the utility model;

[0017] Figure 3 It is a partial cross-sectional view of the combined ring body. Specific implementation method:

[0018] For example, see Figures 1 to 3As shown, a heating and cooling structure for a low-pressure casting hub mold includes a hub upper mold 10 and multiple hub side molds 20. The hub upper mold 10, the multiple hub side molds 20 and the bottom mold are assembled to form a hub molding cavity inside, and a rim molding cavity is formed between the hub upper mold 10 and the hub side mold 20. A combined ring body 30 is fixed on the middle inner wall of the side plate portion of the hub upper mold 10, and multiple heating rods 1 (which are electric heating rods) are inserted into the combined ring body 30. A plurality of cooling water holes 31 are formed on the combined ring body 30.

[0019] Furthermore, the outer side wall of the combined ring body 30 is in close contact with the middle inner side wall of the side plate portion of the wheel hub upper mold 10 .

[0020] The top surface of the assembled ring member 30 is formed with a plurality of downwardly extending oblique insertion holes 32. The heating rod 1 is inserted into each of these oblique insertion holes 32, with the outer sidewall of the heating rod 1 closely contacting the inner sidewall of the corresponding oblique insertion hole 32. The heating rod 1 is positioned close to the central inner sidewall of the side panel of the wheel hub upper mold 10. The central axis of the heating rod 1 is parallel to the corresponding portion of the central inner sidewall of the side panel of the wheel hub upper mold 10. This arrangement ensures that the heating rod 1 heats the side panel of the wheel hub upper mold 10 more evenly.

[0021] Furthermore, thermocouples 2 are provided above and below the combined ring body 30 at the heating rod 1 (a plurality of thermocouples 2 may be provided, and all thermocouples 2 are evenly distributed above and below the combined ring body 30 with the central vertical axis of the combined ring body 30 as the center), and the sensing end of the thermocouple 2 is in contact with the inner side wall of the side plate portion of the wheel hub upper mold 10. The sensing end of the thermocouple 2 is inserted into a positioning recess formed on the middle inner side wall of the side plate portion of the wheel hub upper mold 10. The connecting seat fixed on the thermocouple 2 is fixed on the inner side wall of the side plate portion of the wheel hub upper mold 10, wherein a mica heat insulation sheet is sandwiched between the connecting seat and the inner side wall of the side plate portion of the wheel hub upper mold 10.

[0022] Furthermore, cooling water holes 31 are formed on the upper and lower parts of the inner portion of the assembled ring member 30 at a side away from the side plate portion of the hub upper mold 10 .

[0023] The cooling water hole 31 is a C-shaped water hole extending along the combined ring body 30. The two ends of the upper cooling water hole 31 are close to each other, and its top surface is formed with an upper connecting through hole extending upward. The two ends of the lower cooling water hole 31 are close to each other, and its bottom surface is formed with a lower connecting through hole extending downward.

[0024] One end of the two upper connecting through holes is connected to the cooling water inlet pipe and the other end is connected to the cooling water outlet pipe. Similarly, one end of the two lower connecting through holes is connected to the cooling water inlet pipe and the other end is connected to the cooling water outlet pipe.

[0025] The thermocouple 2 of this embodiment is connected to a thermocouple adapter box via an electrical line. The thermocouple adapter box is electrically connected to an analog module installed on the control mainboard of the control host. At the same time, all cooling water inlet pipes and cooling water outlet pipes are connected to the water cooling system (which includes components such as a water pump, condenser, and water tank, which is a conventional structure and will not be described in detail here). The electrical components of the water cooling system and all heating rods 1 are electrically connected to the control mainboard of the control host via electrical connecting wires. The heating and cooling of this embodiment are then turned on and off by the program on the control mainboard. The temperature changes at the thermocouple measurement points are also displayed as curves on the display screen electrically connected to the control host.

[0026] In the present embodiment, during the aluminum liquid stamping process, all the heating rods 1 are heated and turned on, thereby heating the rim forming cavity to ensure the normal flow of aluminum liquid. The outer wall of the rim forming cavity of the hub side mold 20 is coated with fixed thermal insulation cotton, so that the aluminum liquid in the rim forming cavity can also flow normally, ensuring the integrity of the stamping and improving the casting effect. During solidification, water flows through the cooling water holes 31 to achieve rapid solidification, avoiding problems such as thermal cracks and deformation at the rim, thereby improving the dimensional accuracy and surface quality of the hub, so that there is basically no shrinkage problem at the rim.

[0027] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and is susceptible to numerous variations. Any simple modifications, equivalent variations, and modifications to the above embodiments based on the technical essence of the present invention shall be deemed to fall within the scope of protection of the present invention.

Claims

1. A heating and cooling structure for a low-pressure casting wheel hub mold, comprising a wheel hub upper mold (10) and a wheel hub side mold (20), wherein the wheel hub upper mold (10) and the wheel hub side mold (20) are assembled to form a rim molding cavity therebetween, characterized in that: A combined ring body (30) is fixed on the middle inner wall of the side plate portion of the hub upper mold (10), a plurality of heating rods (1) are inserted into the combined ring body (30), and a plurality of cooling water holes (31) are formed on the combined ring body (30).

2. The heating and cooling structure for a low-pressure casting wheel hub mold according to claim 1, characterized in that: The outer side wall of the combined ring body (30) is in close contact with the middle inner side wall of the side plate portion of the wheel hub upper mold (10).

3. The heating and cooling structure for a low-pressure casting wheel hub mold according to claim 1, characterized in that: The top surface of the combined ring body (30) is formed with a plurality of downwardly extending oblique insertion holes (32), the heating rod (1) is inserted into the corresponding oblique insertion holes (32), the outer side wall of the heating rod (1) is closely attached to the inner side wall of the corresponding oblique insertion hole (32), and the heating rod (1) is close to the middle inner side wall of the side plate portion of the hub upper mold (10).

4. The heating and cooling structure for a low-pressure casting wheel hub mold according to claim 3, characterized in that: The central axis of the heating rod (1) is parallel to the corresponding portion of the middle inner side wall of the side plate portion of the wheel hub upper mold (10).

5. The heating and cooling structure for a low-pressure casting wheel hub mold according to claim 1, characterized in that: Thermocouples (2) are provided above and below the combined ring body (30) at the heating rod (1), and the sensing ends of the thermocouples (2) are in contact with the inner side wall of the side plate portion of the wheel hub upper mold (10).

6. The heating and cooling structure for a low-pressure casting wheel hub mold according to claim 5, characterized in that: The sensing end of the thermocouple (2) is inserted into a positioning recess formed on the middle inner side wall of the side plate portion of the hub upper mold (10).

7. The heating and cooling structure for a low-pressure casting wheel hub mold according to claim 1, characterized in that: Cooling water holes (31) are formed on the upper and lower parts of the inner portion of the combined ring body (30) at one side away from the side plate portion of the hub upper mold (10).

8. The heating and cooling structure for a low-pressure casting wheel hub mold according to claim 7, characterized in that: The cooling water flow hole (31) is a C-shaped water flow hole extending along the combined ring body (30), and the top surfaces of both ends of the upper cooling water flow hole (31) are formed with upper connecting through holes extending upward, and the bottom surfaces of both ends of the lower cooling water flow hole (31) are formed with lower connecting through holes extending downward.

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