A wheel hub mold capable of forming a positioning mounting hole

Abstract

The utility model discloses a kind of wheel hub moulds of formable positioning mounting hole, including wheel hub bottom module, multiple wheel hub side modules and wheel hub top module.It is formed with the circular protruding column extending upwards in the top surface forming of spoke forming portion around wheel hub bottom module, the top surface middle part of circular protruding column is formed with the central protruding portion extending upwards, the bottom surface of wheel hub top module is formed with the protruding portion extending downwards at the central protruding portion, the top end of central protruding portion is close to the bottom surface middle part of protruding portion, so that the thickness of forming portion between the two of forming wheel hub is small, subsequent only need to knock this forming portion can drop, subsequent need not drilling processing, greatly reduce processing difficulty and processing time, and circular protruding column and central protruding portion ensure the accuracy of hole formed on subsequent wheel hub, so that subsequent insert connecting position is accurate.

Description

Technical fields:

[0001] This utility model relates to the field of wheel hub processing equipment technology, and more specifically to a wheel hub mold that can form positioning and mounting holes. Background technology:

[0002] In existing wheel hub manufacturing processes, a wheel hub blank is first formed through casting. According to the design, the spokes of the wheel hub need to be formed with connecting through holes to facilitate the installation of inserts (inserts can meet the personalized needs of the wheel hub's appearance). In the existing casting process, a circular concave hole is formed on the outer wall surface of the spoke where the connecting through hole needs to be machined. Subsequently, a hole needs to be drilled in the middle of the inner end face of the circular concave hole to machine the connecting through hole. However, during wheel hub machining, there will be a certain error in the clamping and positioning of the machine: the CNC machining center has a cumulative error in fixture positioning (above ±0.1mm), which will cause the connecting through hole to have a hole position deviation when drilling later.

[0003] Moreover, there are multiple such connecting holes on a single wheel hub, which increases processing time and difficulty, with drilling time accounting for more than 60% of the total process time.

[0004] Processing efficiency bottleneck: The processing time for a single piece is as long as 5.5 minutes (specific data required), of which the processing of 15-18 positioning holes accounts for more than 60% of the process time. Utility model content:

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wheel hub mold that can form positioning mounting holes. It features an upwardly extending circular protrusion formed on the top surface around the spoke forming part of the wheel hub bottom module. A central protrusion is formed in the center of the top surface of the circular protrusion. A downwardly extending protrusion is formed on the bottom surface of the wheel hub top module facing the central protrusion. The center of the bottom surface of the protrusion is close to the top of the central protrusion directly below it. This results in a small thickness of the forming part between the two parts, allowing the wheel hub to be easily removed by tapping this part, eliminating the need for subsequent drilling and greatly reducing processing difficulty and time. Furthermore, the circular protrusion and the central protrusion ensure the accuracy of the holes formed on the wheel hub, resulting in accurate placement of subsequent inserts.

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

[0007] A wheel hub mold capable of forming positioning mounting holes includes a wheel hub bottom module, multiple wheel hub side modules and a wheel hub top module. The top surface around the spoke forming part of the wheel hub bottom module is formed with an upwardly extending circular protrusion, and the top surface of the circular protrusion is formed with an upwardly extending central protrusion.

[0008] The bottom surface of the hub top module has a downwardly extending protrusion formed at the central protrusion, with the top of the central protrusion directly below the center protrusion at the middle of the bottom surface of the protrusion.

[0009] A gap of 0.8 mm to 0.9 mm is formed between the top surface and the bottom surface of the central protrusion.

[0010] A conical annular portion is formed on the outer wall of the bottom end of the circular protruding column, and the bottom end of the conical annular portion is formed on the top surface of the hub bottom module.

[0011] The bottom outer wall of the central protrusion is formed with a middle annular extension, the bottom surface of which is formed on the top surface of the middle part of the circular protrusion, and the outer wall of the middle annular extension is a conical wall.

[0012] The outstanding effect of this utility model is:

[0013] Compared with existing technologies, this method involves forming an upwardly extending circular protrusion on the top surface around the spoke forming part of the wheel hub bottom module. A central protrusion is formed in the center of the top surface of the circular protrusion, and a downwardly extending protrusion is formed on the bottom surface of the wheel hub top module facing the central protrusion. The center of the bottom surface of the protrusion is close to the top of the central protrusion directly below. This results in a smaller thickness of the forming part between the positioning mounting hole and the upper recessed hole formed on the wheel hub. Subsequently, this forming part can be easily removed by tapping, eliminating the need for drilling and significantly reducing processing difficulty and time. Furthermore, the circular protrusion and the central protrusion are molded along the same central axis, ensuring the accuracy and precision of the holes formed on the wheel hub, thus ensuring accurate placement of subsequent inserts.

[0014] Similarly, the top surface of the spoke forming part near the hub of the bottom module has an upwardly extending stepped protrusion, and the bottom surface of the corresponding top module has a downwardly extending upper frustum-shaped protrusion. There is a gap of 0.8mm to 0.9mm between the bottom surface of the upper frustum-shaped protrusion and the top surface of the top frustum-shaped protrusion of the stepped protrusion. This makes the forming part between the corresponding positioning mounting hole and the corresponding upper concave hole in the subsequent wheel hub forming thin. It can be removed by simply tapping this forming part, without the need for subsequent drilling, which greatly reduces the processing difficulty and processing time. Moreover, the central axes of the bottom large-diameter frustum-shaped protrusion, the middle frustum-shaped protrusion and the top frustum-shaped protrusion of the stepped protrusion are the same axis, which can ensure the accuracy and precision of the positioning mounting hole formed on the subsequent wheel hub, so that the subsequent insert connection position is accurate. Attached image description:

[0015] Figure 1 This is a partial structural schematic diagram of the present invention;

[0016] Figure 2 yes Figure 1 A magnified view of a portion of the image. Detailed implementation method:

[0017] For example, see below. Figures 1 to 2 As shown, a wheel hub mold for forming positioning mounting holes includes a wheel hub bottom module 10, multiple wheel hub side modules 20 and a wheel hub top module 30. The bottom inner sides of all the wheel hub side modules 20 are placed against the outer side of the wheel hub bottom module 10, and the wheel hub top module 30 is placed on the top inner side of all the wheel hub side modules 20 to form an integral mold, the interior of which is the wheel hub forming cavity.

[0018] The top surface around the spoke forming part of the hub bottom module 10 is formed with an upwardly extending circular protrusion 11, and the center of the top surface of the circular protrusion 11 is formed with an upwardly extending central protrusion 12; the circular protrusion 11 here is the top surface of the hub bottom module 10 away from the spoke of the hub forming part.

[0019] The bottom surface of the hub top module 30 has a downwardly extending protrusion 31 formed on the central protrusion 12, and the bottom surface of the protrusion 31 is close to the top of the central protrusion 12 directly below.

[0020] A gap of 0.8 mm to 0.9 mm is formed between the top surface of the central protrusion 12 and the bottom surface of the protrusion 31.

[0021] Furthermore, a conical annular portion 13 is formed on the outer wall of the bottom end of the circular protruding column 11, and the bottom end of the conical annular portion 13 is formed on the top surface of the hub bottom module 10.

[0022] The bottom outer wall of the central protrusion 12 is formed with a central annular extension 14. The bottom surface of the central annular extension 14 is formed on the top surface of the middle part of the circular protrusion 11, and the outer wall of the central annular extension 14 is a conical wall.

[0023] The tapered sidewalls of the intermediate annular extension 14 and the tapered annular portion 13 have a smaller outer diameter at the top and a larger outer diameter at the bottom, which makes it easier to demold during casting.

[0024] Furthermore, the top surface of the spoke forming part of the hub bottom module 10 near the hub is formed with an upwardly extending stepped protrusion 16, and the bottom surface of the corresponding hub top module 30 is formed with a downwardly extending upper frustum-shaped protrusion 32, the bottom outer diameter of the upper frustum-shaped protrusion 32 being small and the top outer diameter being large.

[0025] The stepped protrusion 16 includes a bottom large-diameter frustum protrusion 161, a middle frustum protrusion 162 formed in the middle of the top surface of the bottom large-diameter frustum protrusion 161, and a top frustum protrusion 163 formed in the middle of the top surface of the middle frustum protrusion 162.

[0026] The top outer diameter of the bottom large-diameter frustum protrusion 161, the middle frustum protrusion 162, and the top frustum protrusion 163 is smaller than the corresponding bottom outer diameter. The bottom outer diameter of the middle frustum protrusion 162 is smaller than the top outer diameter of the bottom large-diameter frustum protrusion 161, and the bottom outer diameter of the top frustum protrusion 163 is smaller than the top outer diameter of the middle frustum protrusion 162.

[0027] Furthermore, an arc-shaped transition portion is formed between the outer bottom end of the bottom large-diameter truncated cone protrusion 161 and the top surface of the hub bottom module 10; an arc-shaped transition portion is formed between the outer bottom end of the middle truncated cone protrusion 162 and the top surface of the bottom large-diameter truncated cone protrusion 161; and an arc-shaped transition portion is formed between the outer bottom end of the top truncated cone protrusion 163 and the top surface of the middle truncated cone protrusion 162.

[0028] This curved transition section also facilitates demolding.

[0029] Furthermore, there is a distance of 0.8 mm to 0.9 mm between the bottom surface of the upper frustum-shaped protrusion 32 and the top surface of the top frustum-shaped protrusion 163.

[0030] In this embodiment, a gap 1 of 0.8mm to 0.9mm (0.8mm in this embodiment) is formed between the top surface of the central protrusion 12 and the bottom surface of the protrusion 31, and a distance 2 of 0.8mm to 0.9mm (0.8mm in this embodiment) is formed between the bottom surface of the upper frustum-shaped protrusion 32 and the top surface of the top frustum-shaped protrusion 163.

[0031] These distances result in a thinner forming portion between the corresponding positioning mounting hole and the corresponding upper concave hole during the forming of the wheel hub. This portion is located at the spacing 2 or gap 1, so its forming thickness is less than or equal to 0.8mm (which can form a circular or annular piece depending on the fluidity of the molten metal). This allows the forming portion to be directly removed by striking it with a rod, eliminating the need for drilling later, greatly reducing processing difficulty and time, and improving processing efficiency.

[0032] Furthermore, since the circular protrusion 11, the central protrusion 12, and the stepped protrusion 16 are all on the hub bottom module 10, and during the processing of the hub bottom module 10, it is ensured that the central axes of the circular protrusion 11 and the central protrusion 12 are on the same central axis, and the central axes of the bottom large-diameter frustum protrusion 161, the middle frustum protrusion 162, and the top frustum protrusion 163 of the stepped protrusion 16 are also on the same central axis, the positioning and mounting holes at the corresponding positions of the subsequently formed hub are also coaxial stepped recesses, which are accurate in position and have high precision, ensuring accurate connection position and good installation effect when connecting inserts later.

[0033] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A wheel hub mold for forming positioning mounting holes, comprising a wheel hub bottom module (10), multiple wheel hub side modules (20), and a wheel hub top module (30), characterized in that: The top surface around the spoke forming part of the hub bottom module (10) is formed with an upwardly extending circular protrusion (11), and the top surface of the circular protrusion (11) is formed with an upwardly extending central protrusion (12). The bottom surface of the hub top module (30) is formed with a downwardly extending protrusion (31) facing the central protrusion (12), and the bottom center of the protrusion (31) is close to the top of the central protrusion (12) directly below.

2. The wheel hub mold for forming positioning mounting holes according to claim 1, characterized in that: A gap (1) of 0.8 mm to 0.9 mm is formed between the top surface of the central protrusion (12) and the bottom surface of the protrusion (31).

3. The wheel hub mold for forming positioning mounting holes according to claim 1, characterized in that: A conical annular portion (13) is formed on the outer wall of the bottom end of the circular protruding column (11), and the bottom end of the conical annular portion (13) is formed on the top surface of the hub bottom module (10).

4. The wheel hub mold for forming positioning mounting holes according to claim 1, characterized in that: The bottom outer wall of the central protrusion (12) is formed with a middle annular extension (14), the bottom surface of which is formed on the top surface of the middle part of the circular protrusion (11), and the outer wall of the middle annular extension (14) is a conical wall.

5. A wheel hub mold for forming positioning mounting holes according to claim 1, characterized in that: The top surface of the spoke forming part of the hub bottom module (10) near the hub is formed with an upwardly extending stepped protrusion (16), and the bottom surface of the corresponding hub top module (30) is formed with a downwardly extending upper frustum protrusion (32). The bottom outer diameter of the upper frustum protrusion (32) is small and the top outer diameter is large.

6. A wheel hub mold for forming positioning mounting holes according to claim 5, characterized in that: The stepped protrusion (16) includes a bottom large-diameter frustum protrusion (161), a middle frustum protrusion (162) is formed in the middle of the top surface of the bottom large-diameter frustum protrusion (161), and a top frustum protrusion (163) is formed in the middle of the top surface of the middle frustum protrusion (162). The top outer diameter of the large-diameter frustum protrusion at the bottom (161), the middle frustum protrusion (162), and the top frustum protrusion (163) is smaller than the corresponding bottom outer diameter. The bottom outer diameter of the middle frustum protrusion (162) is smaller than the top outer diameter of the large-diameter frustum protrusion at the bottom (161), and the bottom outer diameter of the top frustum protrusion (163) is smaller than the top outer diameter of the middle frustum protrusion (162).

7. A wheel hub mold for forming positioning mounting holes according to claim 6, characterized in that: A transition section with an arc-shaped cross section is formed between the outer bottom end of the large-diameter truncated cone protrusion (161) and the top surface of the hub bottom module (10); a transition section with an arc-shaped cross section is formed between the outer bottom end of the middle truncated cone protrusion (162) and the top surface of the large-diameter truncated cone protrusion (161); and a transition section with an arc-shaped cross section is formed between the outer bottom end of the top truncated cone protrusion (163) and the top surface of the middle truncated cone protrusion (162).

8. A wheel hub mold for forming positioning mounting holes according to claim 6, characterized in that: There is a distance (2) of 0.8 mm to 0.9 mm between the bottom surface of the upper frustum-shaped protrusion (32) and the top surface of the top frustum-shaped protrusion (163).

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