Wheel hub rapid prototyping equipment and use method thereof

Abstract

The present invention provides a wheel hub rapid prototyping device, belonging to the technical field of aluminum alloy automobile wheel hub manufacturing, comprising a forging device and a casting device. The forging device comprises a first forging upper die, a first forging lower die, a second forging upper die, a second forging lower die, and two first half dies. The second forging lower die can be mounted on the first forging lower die. When assembled, the second forging upper die, the second forging lower die, and the first forging lower die can form a cavity for the mounting plate, spokes, and excess ring portion of the wheel hub. The cavity space of the excess ring portion is smaller than the space of the wheel hub rim portion. The casting device comprises a casting lower die, a casting side die assembly, and a cooling mechanism. By providing a forging device and a casting device, the present invention combines the forging and casting processes of a lightweight wheel hub. The resulting wheel hub has relatively excellent performance and is manufactured at a low cost.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum alloy automobile wheel hub manufacturing, and particularly relates to a wheel hub rapid prototyping device and a use method thereof. Background Art

[0002] The wheels on the market can be divided into steel wheels and alloy wheels according to their materials. Among them, alloy wheels are mostly aluminum alloy wheels. Compared with steel wheels, they are lighter and have better performance. They are high-quality lightweight wheels.

[0003] Existing aluminum alloy automobile wheel manufacturing methods mainly include gravity casting, low-pressure casting, casting spinning and forging spinning. my country's aluminum alloy wheel manufacturing is mainly based on casting. Due to the constraints of its own cost and forming process, aluminum alloy automobile wheels produced by gravity casting and low-pressure casting alone have poor performance compared to forged aluminum alloy wheels. Although aluminum alloy automobile wheels that are completely forged have better performance, they have more process procedures and require the use of a large number of forging molds, resulting in low production efficiency and high production costs. Summary of the Invention

[0004] In response to the drawbacks of the above-mentioned prior art, the present invention provides a wheel hub rapid prototyping device and a method for using the same. The present invention combines a forging device and a casting device to produce lightweight wheels with better performance, and requires fewer forging dies, thereby reducing production costs.

[0005] The invention object of the present invention is achieved through the following technical solutions: A wheel hub rapid prototyping device, including a forging device and a casting device,

[0006] The forging device includes a first forging upper die, a first forging lower die, a second forging upper die, a second forging lower die, and two first half dies, the two first half dies being aligned to form a half die ring; the first forging upper die, the first forging lower die, and the half die ring are assembled to form a cavity for forging the wheel hub; the second forging lower die can be mounted on the first forging lower die, and the second forging upper die, the second forging lower die, and the first forging lower die are assembled to form cavities for the mounting plate, spokes, and excess stock ring of the wheel hub, wherein the cavity space of the excess stock ring is smaller than the space of the wheel rim;

[0007] The casting device includes a casting lower mold, a casting side mold assembly and a cooling mechanism. The casting side mold assembly includes two second half molds, and the two second half molds are matched to form a half mold ring. The casting lower mold extends from bottom to top into the half mold ring of the casting side mold assembly. The second half mold portion of the casting side mold assembly covers the casting lower mold. The top of the casting lower mold is provided with a positioning groove for placing the mounting plate and the spoke, and the casting lower mold is provided with a pouring port; the casting lower mold and the casting side mold assembly are assembled to form a cavity for pouring the rim; the cooling mechanism is provided in both the second half mold and the casting lower mold.

[0008] Preferably, the cooling mechanism adopts a water cooling structure.

[0009] Preferably, an exhaust hole is provided at the top of the second half mold.

[0010] Preferably, a guide rail is provided on the outer side of the first half mold, a slider fixed on the first half mold is slidably provided on the guide rail, a laterally arranged oil cylinder is connected to the slider, and the piston rod end of the oil cylinder is fixedly connected to the slider.

[0011] The present invention also provides a method for using the wheel hub rapid prototyping device, comprising the following steps:

[0012] Step 1: Install the second forging lower die on the first forging lower die, place the forged aluminum alloy bar on the first forging lower die and the second forging lower die, control the second forging upper die to press downward, and the second forging upper die, the second forging lower die, and the first forging lower die cooperate with each other to perform the first forging process on the forged aluminum alloy bar to forge a forging blank, which includes a mounting plate, a spoke, and a residual ring;

[0013] Step 2: Take out the forging blank and invert it into the positioning groove of the casting lower mold on the casting device. The two second half molds are assembled to form a casting side mold assembly. The casting lower mold and the casting side mold assembly cooperate to form a mold cavity. At this time, the outer end of the spoke of the forging blank and the residual ring are extended into the mold cavity of the casting device. The cast aluminum alloy liquid is poured into the mold cavity of the casting device through the pouring port to fill the mold. The aluminum alloy liquid is solidified from bottom to top by the cooling mechanism to cast the rim blank. At this time, the combination of the forging blank and the rim blank is completed, and the residual ring is wrapped by the rim blank.

[0014] Step 3: Take out the forging blank and the rim blank from the casting device, place the forging blank on the first forging lower die, and make the rim blank part face upwards, drive the first half die toward the rim blank by the cylinder to press out the external structure of the rim blank, and then control the first forging upper die to press down to press out the internal structure of the rim blank, thereby realizing the second forging process and obtaining a lightweight hub blank. In the second forging process, the excess ring is deformed together with the rim blank so that the excess ring and the rim blank are more tightly combined.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention combines the forging process and the casting process of the lightweight wheel hub through a forging device and a casting device, and requires fewer forging molds and casting molds. During the first forging, the second forging lower mold and the first forging lower mold are assembled to form the lower mold for the first forging process. During the second forging, the second forging lower mold is removed and the first forging lower mold is used as the lower mold for the second forging process. The second forging lower mold has a simple structure and a low manufacturing cost, which can greatly reduce the forging cost. At the same time, the casting device only includes a casting lower mold, a casting side mold assembly and a cooling mechanism, and there is no need for a casting upper film, which simplifies the structure of the forging device and can further reduce the cost of manufacturing the lightweight wheel hub.

[0017] 2. Compared with the complete use of casting technology, the present invention combines forging and casting technology to produce a lightweight wheel hub with better performance. This can be directly derived from the advantages and disadvantages of the forging process and the casting process.

[0018] 3. Compared with the complete forging process, the present invention requires fewer forging dies and has lower costs;

[0019] 4. The excess ring obtained in the first forging process is wrapped by the rim blank during the casting process, and by setting the connecting groove, the excess ring and the rim blank are more tightly combined, thereby making the strength of the combination between the spoke and the rim better. In the second forging process, the excess ring and the rim blank are deformed together, which can make the combination between the excess ring and the rim blank tighter, and make the final lightweight hub structure stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure between the first forging upper die, the first forging lower die, and the second forging lower die;

[0021] Figure 2 This is a schematic diagram of the state in which the first forging upper die, the first forging lower die, and the second forging lower die cooperate to forge a forging blank;

[0022] Figure 3 A schematic diagram of placing a forging blank into a casting device;

[0023] Figure 4 A schematic diagram of the second forging process;

[0024] Figure 5 Schematic diagram of forging blank structure;

[0025] Figure 6 Schematic diagram of the state after the casting blank and the rim blank are combined after the casting process;

[0026] Figure 7 This is a schematic diagram of the lightweight wheel blank structure;

[0027] Markings in the figure: 1. First forging upper die, 2. First forging lower die, 3. Second forging upper die, 4. Second forging lower die, 5. First half die, 6. Guide rail, 7. Slider, 8. Cylinder, 9. Casting lower die, 10. Casting side die assembly, 11. Cooling mechanism, 12. Second half die, 13. Positioning groove, 14. Casting mouth, 15. Exhaust hole, 16. Mounting plate, 17. Spoke, 18. Residual material ring, 19. Rim, 20. Wheel flange. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0029] Example 1

[0030] like Figures 1-4 As shown, a wheel hub rapid prototyping device includes a forging device and a casting device.

[0031] The forging device includes a first forging upper die 1, a first forging lower die 2, a second forging upper die 3, a second forging lower die 4, and two first half dies 5, and the two first half dies 5 are matched to form a half die ring; the first forging upper die 1, the first forging lower die 2 and the half die ring can form a cavity for forging the wheel hub after being assembled; the second forging lower die 4 can be installed on the first forging lower die 2, and the second forging lower die 4 and the first forging lower die 2 are fixedly connected by bolts. The second forging upper die 3, the second forging lower die 4 and the first forging lower die 2 can form a cavity at the mounting plate 16, the spoke 17 and the residual ring 18 of the wheel hub after being assembled, and the cavity space at the residual ring 18 is smaller than the space at the wheel rim 20 of the wheel hub; the outer side of the first half die 5 is provided with a guide rail 6, and a slider 7 fixed to the first half die 5 is slidably provided on the guide rail 6, and a horizontally arranged oil cylinder 8 is connected to the slider 7, and the piston rod end of the oil cylinder 8 is fixedly connected to the slider 7.

[0032] The casting apparatus includes a lower casting mold 9, a side mold assembly 10, and a cooling mechanism 11. The side mold assembly 10 includes two second half molds 12, which are combined to form a half mold ring. The lower casting mold 9 extends from bottom to top into the half mold ring of the side mold assembly 10. The second half mold 12 of the side mold assembly 10 partially covers the lower casting mold 9. The top of the lower casting mold 9 is provided with a positioning groove 13 for accommodating a mounting plate 16 and a spoke 17. The lower casting mold 9 is provided with a pouring port 14. The lower casting mold 9 and the side mold assembly 10 are assembled to form a cavity for pouring the rim 19. The cooling mechanism 11 is provided in both the second half mold 12 and the lower casting mold 9. The cooling mechanism 11 adopts a water-cooling structure. An exhaust hole 15 is provided at the top of the second half mold 12 for exhaust during the casting process.

[0033] The present invention also provides a method for using the wheel hub rapid prototyping device, comprising the following steps:

[0034] Step 1: Install the second forging lower die 4 on the first forging lower die 2, place the forged aluminum alloy bar on the first forging lower die 2 and the second forging lower die 4, control the second forging upper die 3 to press down, the second forging upper die 3, the second forging lower die 4, and the first forging lower die 2 cooperate with each other to perform the first forging process on the forged aluminum alloy bar to forge a forging blank, such as Figure 5 As shown, the forged blank includes a mounting disc 16 , spokes 17 and a residual stock ring 18 .

[0035] Step 2: Take out the forging blank and invert it into the positioning groove 13 of the casting lower mold 9 on the casting device. The two second half molds 12 are assembled to form a casting side mold assembly 10. The casting lower mold 9 and the casting side mold assembly 10 cooperate to form a mold cavity. At this time, the outer end of the spoke 17 of the forging blank and the residual material ring 18 extend into the mold cavity of the casting device. The cast aluminum alloy liquid is poured into the mold cavity of the casting device through the pouring port 14 to fill the mold. The aluminum alloy liquid is solidified from bottom to top through the cooling mechanism 11 to cast the rim blank. At this time, the combination of the forging blank and the rim blank is completed, and the residual material ring 18 is wrapped by the rim blank. Figure 6 shown.

[0036] Step 3: Take out the forging blank and the rim blank from the casting device, place the forging blank on the first forging lower die 2, and make the rim blank part face upwards, drive the first half die 5 toward the rim blank through the oil cylinder 8 to press the outer structure of the rim blank, and then control the first forging upper die 1 to press down to press the inner structure of the rim blank, thereby completing the second forging process and obtaining a lightweight hub blank. Figure 7 As shown, in the second forging process, the residual ring 18 is deformed together with the rim blank so that the residual ring 18 and the rim blank are more tightly bonded.

[0037] It should be understood that in the claims and description of the present invention, all "including..." should be understood as open-ended, that is, its meaning is equivalent to "at least containing...", and should not be understood as closed-ended, that is, its meaning should not be understood as "only including...".

[0038] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A method for using a wheel hub rapid prototyping device, characterized in that: The wheel hub rapid prototyping equipment includes a forging device and a casting device, the forging device includes a first forging upper die, a first forging lower die, a second forging upper die, a second forging lower die, and two first half dies, the two first half dies are matched to form a half die ring; the first forging upper die, the first forging lower die and the half die ring can form a cavity for forging the wheel hub after being assembled; the second forging lower die can be installed on the first forging lower die, and the second forging upper die, the second forging lower die and the first forging lower die can form a cavity for the mounting plate, the spoke and the residual material ring of the wheel hub after being assembled, and the cavity space of the residual material ring is smaller than that of the wheel hub. The space at the wheel rim portion; the casting device comprises a casting lower mold, a casting side mold assembly and a cooling mechanism, the casting side mold assembly comprises two second half molds, the two second half molds are matched to form a half mold ring, the casting lower mold extends from bottom to top into the half mold ring of the casting side mold assembly, the second half mold portion of the casting side mold assembly covers the casting lower mold, the top of the casting lower mold is provided with a positioning groove for placing a mounting plate and a spoke, and the casting lower mold is provided with a pouring port; the casting lower mold and the casting side mold assembly are assembled to form a cavity for pouring the wheel rim; the cooling mechanism is provided in both the second half mold and the casting lower mold; The method of using the wheel hub rapid prototyping equipment includes the following steps: Step 1: Install the second forging lower die on the first forging lower die, place the forged aluminum alloy bar on the first forging lower die and the second forging lower die, control the second forging upper die to press downward, and the second forging upper die, the second forging lower die, and the first forging lower die cooperate with each other to perform the first forging process on the forged aluminum alloy bar to forge a forging blank, which includes a mounting plate, a spoke, and a residual ring; Step 2: Take out the forging blank and invert it into the positioning groove of the casting lower mold on the casting device. The two second half molds are assembled to form a casting side mold assembly. The casting lower mold and the casting side mold assembly cooperate to form a mold cavity. At this time, the outer end of the spoke of the forging blank and the residual ring are extended into the mold cavity of the casting device. The cast aluminum alloy liquid is poured into the mold cavity of the casting device through the pouring port to fill the mold. The aluminum alloy liquid is solidified from bottom to top by the cooling mechanism to cast the rim blank. At this time, the combination of the forging blank and the rim blank is completed, and the residual ring is wrapped by the rim blank. Step 3: Take out the forging blank and the rim blank from the casting device, place the forging blank on the first forging lower die, and make the rim blank part face upwards, drive the first half die toward the rim blank by the cylinder to press out the external structure of the rim blank, and then control the first forging upper die to press down to press out the internal structure of the rim blank, thereby realizing the second forging process and obtaining a lightweight hub blank. In the second forging process, the excess ring is deformed together with the rim blank so that the excess ring and the rim blank are more tightly combined.

2. The method for using the wheel hub rapid prototyping equipment according to claim 1, characterized in that: The cooling mechanism adopts a water cooling structure.

3. The method for using the wheel hub rapid prototyping equipment according to claim 1 or 2, characterized in that: An exhaust hole is provided at the top of the second half mold.

4. The method for using the wheel hub rapid prototyping equipment according to claim 1, characterized in that: A guide rail is provided on the outer side of the first half mold, and a slider fixed on the first half mold is slidably provided on the guide rail. The slider is connected to a horizontally arranged oil cylinder, and the end of the piston rod of the oil cylinder is fixedly connected to the slider.

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