Integrated hub and manufacturing method thereof

Abstract

The invention relates to an integrated hub and a manufacturing method thereof.The manufacturing method comprises the steps that a first semi-finished product blank is installed on a first spinning machine through a positioning hole, and a rotary cutting wheel is installed on one side of the first semi-finished product blank; the rotary cutting wheel rotationally cuts the first semi-finished product blank into a spoke, and a first rim ring material and a second rim ring material which are symmetrically located on the two sides of the spoke to form a second semi-finished product blank; s3, an upper forming mold is installed on an upper spinning machine, a lower forming mold is installed on a lower spinning machine, a side forming mold is installed on a side spinning machine, a positioning shaft is installed in the middle of the lower forming mold, a second semi-finished product blank is installed on the positioning shaft through a positioning hole, the spoke is clamped by the upper forming mold and the lower forming mold, and the spoke is formed; the upper forming die and the side forming die are in spinning fit to form a first rim, and the lower forming die and the side forming die are in spinning fit to form a second rim. The production process is shortened, the strength and integrity of the product are improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel hub processing, and in particular to an integrated wheel hub and a manufacturing method thereof. Background Art

[0002] The existing wheel production methods mainly include cast aluminum alloy wheels, forged aluminum alloy wheels and welded wheels. No matter which production process is used, there are the following problems: large equipment investment, many production links, low production efficiency and high product cost. Summary of the invention

[0003] In view of the existing technical problems, the present invention provides an integrated wheel hub and a manufacturing method thereof.

[0004] The technical solution of the present invention to solve the above technical problem is as follows: an integrated wheel hub comprises a spoke and a rim, the rim is symmetrically arranged on both sides of the spoke, and the spoke and the rim are integrally formed by spinning.

[0005] The present invention also discloses a method for manufacturing an integrated wheel hub, comprising the following steps:

[0006] Step S1: selecting a metal disc material with a diameter of D and a thickness of h, and processing a positioning hole at the center of the disc material to form a first semi-finished product blank;

[0007] Step S2: installing the first semi-finished blank on the first spinning machine through the positioning hole, installing a peeling wheel on one side of the first semi-finished blank, and peeling the first semi-finished blank into a spoke, and a first rim ring material and a second rim ring material symmetrically located on both sides of the spoke, to form a second semi-finished blank;

[0008] Step S3: Install the upper forming mold on the upper spinning machine, install the lower forming mold on the lower spinning machine, and install the side forming mold on the side spinning machine. A positioning shaft is installed in the middle of the lower forming mold, and the second semi-finished product blank is installed on the positioning shaft through the positioning hole. The upper forming mold and the lower forming mold clamp the spokes, and the upper forming mold and the side forming mold are spun together to form a first rim, and the lower forming mold and the side forming mold are spun together to form a second rim.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows:

[0010] Preferably, the method further includes step S21: the rotary cutting wheel is installed on the driving device, the rotary cutting wheel contacts the outer edge of the first semi-finished product blank, and rotary cuts inward to a certain depth from the thickness h / 2 of the first semi-finished product blank to form spokes, a first rim ring material and a second rim ring material.

[0011] Preferably, the rotary cutting wheel comprises an arcuate surface and a rotary cutting blade, the rotary cutting blade is located in the middle of the outer edge of the rotary cutting wheel, the arcuate surface is symmetrically located on both sides of the rotary cutting blade, and the arcuate surface and the rotary cutting blade have a smooth transition.

[0012] Preferably, the arc surface is an outwardly convex arc surface, and the radius R of the arc surface is 180mm-200mm.

[0013] Preferably, the rotary cutter is V-shaped, and the angle δ of the rotary cutter is 30°-50°.

[0014] Preferably, a boss is provided in the middle of the outer edge of the side molding mold, and both sides of the boss are symmetrically provided with smoothly transitioned rounded corners R1, R2, R3 and R4.

[0015] Preferably, the upper molding die is provided with an upper positioning groove, an upper fixing plate is installed in the upper positioning groove, the upper fixing plate is connected to the upper spinning machine, and the lower molding die is provided with a lower positioning groove, a lower fixing plate is installed in the lower positioning groove, and the lower fixing plate is connected to the lower spinning machine.

[0016] Preferably, the positioning shaft is a stepped shaft, and the upper molding die is provided with a corresponding stepped hole.

[0017] The invention has the following beneficial effects: the one-piece spoke and rim formed by spin forming saves the welding process, reduces the processing cost, avoids cracking at the welding point, and improves the structural strength and service life of the hub. The disc material is peeled into the spoke, the first rim ring material and the second rim ring material by the peeling wheel, and then the forming mold is used for spin forming, so as to ensure the structural strength of the hub, shorten the production process, improve the strength and integrity of the product, and reduce the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the rotary cutting wheel of the present invention;

[0019] Figure 2 It is a schematic diagram of the present invention during spinning;

[0020] Figure 3 It is a schematic diagram of the side forming mold of the present invention.

[0021] The accompanying drawings are marked as follows: 1. Peeling wheel; 1.1. Arc surface; 1.2. Peeling knife; 2. Side forming mold; 2.1. Boss; 3. Upper forming mold; 4. Lower forming mold; 5. Spoke; 6. First rim; 7. Second rim; 8. Positioning shaft; 9. Upper fixing plate; 10. Lower fixing plate. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] like Figures 1 to 3 As shown, the present invention discloses an integrated wheel hub, comprising a spoke 5 and a rim, wherein the rim is symmetrically provided on both sides of the spoke 5, and the spoke 5 and the rim are integrally formed by spinning.

[0024] The present invention also discloses a method for manufacturing an integrated wheel hub, comprising the following steps:

[0025] Step S1: Select a metal disc material with a diameter of D and a thickness of h. The diameter and thickness of the metal disc material are selected according to the size of the wheel hub. The thickness of the metal disc material is the thickness of the spoke 5. The material of the disc material can be aluminum alloy or steel. A positioning hole is processed at the center of the disc material to form a first semi-finished blank.

[0026] Step S2: The first semi-finished blank is installed on the first spinning machine through the positioning hole, and a peeling wheel 1 is installed on one side of the first semi-finished blank. The peeling wheel 1 peels the first semi-finished blank into the spoke 5 and the first rim ring material and the second rim ring material symmetrically located on both sides of the spoke 5 to form a second semi-finished blank;

[0027] Step S21: the peeling wheel 1 is installed on the driving device, the peeling wheel 1 contacts the outer edge of the first semi-finished product blank, and peels inwards to a certain depth from the thickness h / 2 of the first semi-finished product blank to form the spokes 5, the first rim ring material and the second rim ring material;

[0028] The rotary cutting wheel 1 includes an arc surface 1.1 and a rotary cutting blade 1.2, wherein the rotary cutting blade 1.2 is located in the middle of the outer edge of the rotary cutting wheel 1, and the arc surface 1.1 is symmetrically located on both sides of the rotary cutting blade 1.2, and the arc surface 1.1 and the rotary cutting blade 1.2 have a smooth transition. When the rotary cutting wheel 1 rotary cuts from the middle of the first semi-finished product blank inward, the disc material is divided into two according to the thickness. As the rotary cutting wheel 1 is continuously fed inward, the arc surface 1.1 continuously props up the first rim 6 ring material and the second rim 7 ring material outward until the rotary cutting reaches the required diameter of the spoke 5, and the rotary cutting stops.

[0029] The arc surface 1.1 is an arc surface protruding outward, which is convenient for supporting the first rim ring material and the second rim ring material. The radius R of the arc surface 1.1 is 180mm-200mm, and the contact area between the arc surface structure and the ring material is small, thereby reducing the friction between the arc surface 1.1 and the ring material, reducing the resistance during feeding of the rotary cutting wheel 1, ensuring the smoothness of the rotary cutting wheel 1 when rotary cutting the material, and improving the processing efficiency.

[0030] The rotary cutter 1.2 is V-shaped, and the angle δ of the rotary cutter 1.2 is 30°-50°, which ensures the rotary cutting effect.

[0031] Furthermore, the end of the rotary cutter 1.2 is provided with a fillet with a radius r, where r is 0.2 mm-0.3 mm, which can effectively disperse the stress at the cutting edge and ensure the service life of the rotary cutter 1.2.

[0032] Step S3: installing the upper molding die 3 on the upper spinning machine, and installing the lower molding die 4 on the lower spinning machine. Specifically, the upper molding die 3 is provided with an upper positioning groove, and an upper fixing plate 9 is installed in the upper positioning groove. The upper fixing plate 9 is connected to the upper spinning machine. The lower molding die 4 is provided with a lower positioning groove, and a lower fixing plate 10 is provided in the lower positioning groove. The lower fixing plate 10 is connected to the lower spinning machine, which facilitates the disassembly and assembly of the upper molding die 3 and the lower molding die 4, meets the molding requirements of different shapes of wheels, and reduces the processing cost.

[0033] The side forming mold 2 is installed on the side spinning machine, and a positioning shaft 8 is installed in the middle of the lower forming mold 4. The second semi-finished product blank is installed on the positioning shaft 8 through the positioning hole. The upper forming mold and the lower forming mold 4 clamp the spoke 5. The upper spinning machine, the lower spinning machine and the side spinning machine work simultaneously. The forming surface of the upper forming mold 3 corresponds to the shape of the inner wall of the first rim 6. The upper forming mold 3 and the side forming mold 2 are spun together to form the first rim 6. The forming surface of the lower forming mold 4 corresponds to the shape of the inner wall of the second rim 7. The lower forming mold 4 and the side forming mold 2 are spun together to form the second rim 7.

[0034] The molding surface of the side molding die 2 corresponds to the shape of the outer side wall of the wheel hub, a boss 2.1 is provided in the middle of the outer edge of the side molding die 2, and smooth transition fillets R1, R2, R3 and R4 are symmetrically provided on both sides of the boss 2.1, and the size of the fillets corresponds to the shape of the wheel hub, so as to ensure the molding effect of the first rim 6 and the second rim 7, ensure the overall structural strength, and improve the molding quality.

[0035] Furthermore, the horizontal center line of the side molding die 2 and the horizontal center of the spoke 5 are located in the same horizontal plane, ensuring that the first rim 6 and the second rim 7 spun on both sides of the spoke 5 have the same structure, thereby ensuring molding quality.

[0036] Furthermore, the positioning shaft 8 is a stepped shaft, and the upper forming mold 3 is provided with a corresponding stepped hole to ensure the accuracy and precision of positioning and protect the quality of spin forming.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated wheel hub, characterized in that: It comprises a wheel spoke (5) and a wheel rim, wherein the wheel rim is symmetrically arranged on both sides of the wheel spoke (5), and the wheel spoke (5) and the wheel rim are integrally formed by spinning.

2. The method for manufacturing an integrated wheel hub according to claim 1, characterized in that: The following steps are involved: Step S1: selecting a metal disc material with a diameter of D and a thickness of h, and processing a positioning hole at the center of the disc material to form a first semi-finished product blank; Step S2: The first semi-finished blank is mounted on a first spinning machine through a positioning hole, a peeling wheel (1) is mounted on one side of the first semi-finished blank, and the peeling wheel (1) peels the first semi-finished blank into a spoke (5) and a first rim ring material and a second rim ring material symmetrically located on both sides of the spoke (5), thereby forming a second semi-finished blank; Step S3: Install the upper molding die (3) on the upper spinning machine, install the lower molding die (4) on the lower spinning machine, and install the side molding die (2) on the side spinning machine. A positioning shaft (8) is installed in the middle of the lower molding die (4). The second semi-finished product blank is installed on the positioning shaft (8) through the positioning hole. The upper molding die and the lower molding die (4) clamp the spoke (5). The upper molding die (3) and the side molding die (2) are spun together to form a first rim (6). The lower molding die (4) and the side molding die (2) are spun together to form a second rim (7).

3. The method for manufacturing an integrated wheel hub according to claim 2, characterized in that: The method further comprises step S21: the rotary cutting wheel (1) is mounted on a driving device, the rotary cutting wheel (1) contacts the outer edge of the first semi-finished product blank, and rotary cuts inwards to a certain depth from the thickness h / 2 of the first semi-finished product blank to form a spoke (5), a first rim ring material and a second rim ring material.

4. The method for manufacturing an integrated wheel hub according to claim 2, characterized in that: The rotary cutting wheel (1) comprises a curved surface (1.1) and a rotary cutting blade (1.2); the rotary cutting blade (1.2) is located in the middle of the outer edge of the rotary cutting wheel (1); the curved surface (1.1) is symmetrically located on both sides of the rotary cutting blade (1.2); and the curved surface (1.1) and the rotary cutting blade (1.2) are smoothly transitioned.

5. The method for manufacturing an integrated wheel hub according to claim 4, characterized in that: The arc surface (1.1) is an arc surface protruding outwards, and the radius R of the arc surface (1.1) is 180 mm-200 mm.

6. The method for manufacturing an integrated wheel hub according to claim 4 or 5, characterized in that: The rotary cutter (1.2) is V-shaped, and the angle δ of the rotary cutter (1.2) is 30°-50°.

7. The method for manufacturing an integrated wheel hub according to claim 2, characterized in that: A boss (2.1) is provided in the middle of the outer edge of the side molding die (2), and rounded corners R1, R2, R3 and R4 with smooth transitions are symmetrically provided on both sides of the boss (2.1).

8. The method for manufacturing an integrated wheel hub according to claim 2, characterized in that: The upper molding die (3) is provided with an upper positioning groove, an upper fixing plate (9) is installed in the upper positioning groove, and the upper fixing plate (9) is connected to the upper spinning machine; the lower molding die (4) is provided with a lower positioning groove, a lower fixing plate (10) is installed in the lower positioning groove, and the lower fixing plate (10) is connected to the lower spinning machine.

9. The method for manufacturing an integrated wheel hub according to claim 2, characterized in that: The positioning shaft (8) is a stepped shaft, and the upper molding die (3) is provided with a corresponding stepped hole.

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