Hub rapid forming equipment and using method thereof

Abstract

The invention provides hub rapid forming equipment, and belongs to the technical field of aluminum alloy automobile hub manufacturing, the hub rapid forming equipment comprises 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 installed on the first forging lower die, the second forging upper die, the second forging lower die and the first forging lower die can form a cavity of an installation disc, a spoke and an excess material ring part of the hub after being spliced, and the space of the cavity of the excess material ring part is smaller than the space of a rim part of the hub; the casting device comprises a lower casting mold, a side casting mold assembly and a cooling mechanism. The forging device and the casting device are arranged, the forging procedure and the casting procedure of the lightweight hub are combined, the machined hub has excellent performance, and the manufacturing cost is low.

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. The aluminum alloy wheel manufacturing in my country is mainly based on casting. Due to the constraints of its own cost and forming process, the performance of aluminum alloy automobile wheels produced by gravity casting and low-pressure casting alone is inferior to that of forged aluminum alloy wheels. Although the aluminum alloy automobile wheels that are completely forged have better performance, they have more process procedures and require a large number of forging molds, resulting in low production efficiency and high production costs. Summary of the invention

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

[0005] The invention objective of the present invention is achieved through the following technical scheme: a wheel hub rapid prototyping device, 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 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 a wheel hub after being assembled; the second forging lower die can be installed on the first forging lower die, the second forging upper die, the second forging lower die and the first forging lower die can form a cavity at the mounting plate, the spoke and the excess material ring of the wheel hub after being assembled, and the cavity space at the excess material ring is smaller than the space at the wheel rim of the wheel hub; The casting device includes a casting lower membrane, 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 membrane extends from bottom to top into the half mold ring of the casting side mold assembly. The second half mold part of the casting side mold assembly covers the casting lower membrane. The top of the casting lower membrane is provided with a positioning groove for placing a mounting plate and a spoke, and the casting lower membrane is provided with a pouring port. The casting lower membrane and the casting side mold assembly are assembled to form a cavity for pouring a rim. The cooling mechanism is provided in the second half mold and the casting lower membrane.

[0006] Preferably, the cooling mechanism adopts a water cooling structure.

[0007] Preferably, an exhaust hole is provided at the top of the second half mold.

[0008] 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.

[0009] The present invention also provides a method for using the wheel hub rapid prototyping device, comprising the following steps: Step 1: The second forging lower die can be installed on the first forging lower die, the forged aluminum alloy bar is placed on the first forging lower die and the second forging lower die, the second forging upper die is controlled to press downward, the second forging upper die, the second forging lower die and the first forging lower die cooperate with each other, and the forged aluminum alloy bar is subjected to the first forging process to forge a forged blank, which includes a mounting plate, a spoke and a residual material ring; Step 2: Take out the forged blank and invert it into the positioning groove of the lower casting film on the casting device, and assemble the two second half molds to form a casting side mold assembly. The lower casting film and the casting side mold assembly cooperate to form a cavity. At this time, the spoke outer end of the forged blank and the residual material ring extend into the cavity of the casting device, and the casting aluminum alloy liquid is poured into the cavity of the casting device through the pouring port to fill the mold. The aluminum alloy liquid is solidified from bottom to top through the cooling mechanism to cast the rim blank. At this time, the forged blank and the rim blank are combined, and the residual material ring is wrapped by the rim blank; Step three: 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, and then realize the second forging process to obtain a lightweight hub blank. In the second forging process, the excess ring is deformed together with the rim blank to make the excess ring and the rim blank more tightly combined.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 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 of 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 of 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 film, 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.

[0011] 2. Compared with the casting process, the lightweight wheel hub produced by the present invention combines the forging and casting processes, and has better performance, which can be directly derived from the advantages and disadvantages of the forging process and the casting process; 3. Compared with the complete forging process, the present invention requires fewer forging dies and has lower costs; 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, so that the strength of the combination between the spoke and the rim can be better. In the second forging process, the excess ring and the rim blank are deformed together, which can make the excess ring and the rim blank more tightly combined, so that the final lightweight hub structure has better strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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; Figure 2 It 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; Figure 3 A schematic diagram of placing a forging blank into a casting device; Figure 4 is a schematic diagram of the second forging process; Figure 5 It is a schematic diagram of the forging blank structure; Figure 6 It is a schematic diagram of the state after the casting blank and the rim blank are combined after the casting process; Figure 7 This is a schematic diagram of the structure of a lightweight wheel hub blank; 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 membrane, 10. casting side die assembly, 11. cooling mechanism, 12. second half die, 13. positioning groove, 14. pouring mouth, 15. exhaust hole, 16. mounting plate, 17. spoke, 18. residual material ring, 19. rim, 20. flange. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: Example 1

[0014] like Figure 1-Figure 4 As shown, a wheel hub rapid prototyping device includes a forging device and a casting device. The forging device comprises 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, 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 a wheel hub after being assembled; the second forging lower die 4 can be installed on the first forging lower die 2, 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 excess material ring 18 of the wheel hub after being assembled, and the cavity space at the excess material ring 18 is smaller than the space at the wheel rim 20 of the wheel hub; the first half die 5 is provided with a guide rail 6 on the outer side surface, 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.

[0015] The casting device includes a casting lower film 9, a casting side mold assembly 10 and a cooling mechanism 11. The casting side mold assembly 10 includes two second half molds 12. The two second half molds 12 are matched to form a half mold ring. The casting lower film 9 extends from bottom to top into the half mold ring of the casting side mold assembly 10. The second half mold 12 of the casting side mold assembly 10 partially covers the casting lower film 9. The top of the casting lower film 9 is provided with a positioning groove 13 for placing the mounting plate 16 and the spoke 17. The casting lower film 9 is provided with a pouring port 14. The casting lower film 9 and the casting side mold assembly 10 are assembled to form a cavity for pouring the rim 19. The second half mold 12 and the casting lower film 9 are both provided with the above-mentioned cooling mechanism 11, and the cooling mechanism 11 adopts a water-cooling structure. The top of the second half mold 12 is provided with an exhaust hole 15 for exhaust during the casting process.

[0016] The present invention also provides a method for using the wheel hub rapid prototyping device, comprising the following steps: Step 1: The second forging lower die 4 can be installed on the first forging lower die 2, the forged aluminum alloy bar is placed on the first forging lower die 2 and the second forging lower die 4, the second forging upper die 3 is controlled to press downward, the second forging upper die 3, the second forging lower die 4, and the first forging lower die 2 cooperate with each other, and the forged aluminum alloy bar is subjected to the first forging process to forge a forged blank, such as Figure 5 As shown, the forged blank includes a mounting disc 16 , a spoke 17 and a residual ring 18 .

[0017] Step 2: Take out the forged blank and invert it into the positioning groove 13 of the casting lower film 9 on the casting device. The two second half molds 12 are assembled to form a casting side mold assembly 10. The casting lower film 9 and the casting side mold assembly 10 cooperate to form a cavity. At this time, the outer end of the spoke 17 of the forged blank and the residual ring 18 extend into the cavity of the casting device. The casting aluminum alloy liquid is poured into the 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 forged blank and the rim blank is completed, and the residual ring 18 is wrapped by the rim blank. Figure 6 shown.

[0018] Step 3: Take out the forged blank and the rim blank from the casting device, place the forged blank on the first forging lower die 2, and make the rim blank part face upward, drive the first half die 5 to press toward the rim blank through the oil cylinder 8 to press out the external structure of the rim blank, and then control the first forging upper die 1 to press down to press out the internal structure of the rim blank, and then realize the second forging process to obtain a lightweight hub blank, such as 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 combined.

[0019] It should be understood that in the claims and description of the present invention, all "including..." should be understood as an open-ended meaning, that is, its meaning is equivalent to "at least contains...", and should not be understood as a closed meaning, that is, its meaning should not be understood as "only includes...".

[0020] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A wheel hub rapid prototyping device, characterized in that: The forging device comprises a forging device and a casting device, wherein 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, wherein 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 a 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 a mounting plate, a spoke and a residual material ring of the wheel hub after being assembled, wherein the cavity space of the residual material ring is smaller than the space of the wheel rim of the wheel hub; The casting device includes a casting lower membrane, 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 membrane extends from bottom to top into the half mold ring of the casting side mold assembly. The second half mold part of the casting side mold assembly covers the casting lower membrane. The top of the casting lower membrane is provided with a positioning groove for placing a mounting plate and a spoke, and the casting lower membrane is provided with a pouring port. The casting lower membrane and the casting side mold assembly are assembled to form a cavity for pouring a rim. The cooling mechanism is provided in the second half mold and the casting lower membrane.

2. A wheel hub rapid prototyping device according to claim 1, characterized in that: The cooling mechanism adopts a water cooling structure.

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

4. 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, 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.

5. A method for using a wheel hub rapid prototyping device, characterized in that: The steps include: Step 1: The second forging lower die can be installed on the first forging lower die, the forged aluminum alloy bar is placed on the first forging lower die and the second forging lower die, the second forging upper die is controlled to press downward, the second forging upper die, the second forging lower die and the first forging lower die cooperate with each other, and the forged aluminum alloy bar is subjected to the first forging process to forge a forged blank, which includes a mounting plate, a spoke and a residual material ring; Step 2: Take out the forged blank and invert it into the positioning groove of the lower casting film on the casting device, and assemble the two second half molds to form a casting side mold assembly. The lower casting film and the casting side mold assembly cooperate to form a cavity. At this time, the spoke outer end of the forged blank and the residual material ring extend into the cavity of the casting device, and the casting aluminum alloy liquid is poured into the cavity of the casting device through the pouring port to fill the mold. The aluminum alloy liquid is solidified from bottom to top through the cooling mechanism to cast the rim blank. At this time, the forged blank and the rim blank are combined, and the residual material ring is wrapped by the rim blank; Step three: 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, and then realize the second forging process to obtain a lightweight hub blank. In the second forging process, the excess ring is deformed together with the rim blank to make the excess ring and the rim blank more tightly combined.

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