A positioning device for wheel hub machining

Abstract

This utility model relates to the field of aluminum alloy wheel hub manufacturing technology and discloses a wheel hub machining positioning device, which includes a base, a positioning turntable rotatably connected to the base, a central shaft corresponding to the center hole of the wheel hub, and a positioning block for horizontal angle positioning of the wheel hub. The positioning block is connected to a telescopic cylinder, and a wedge-shaped guide surface is provided on the side of the positioning block to guide the positioning block into the wheel hub window. This utility model achieves horizontal angle positioning of the wheel hub through a liftable positioning block and pre-milled window, combined with the center positioning of the mandrel and the auxiliary positioning of the radial block, significantly improving the positioning accuracy of the wheel hub before entering the machining center. This effectively reduces the angular deviation of bolt holes and valve holes in the machined product, ensuring the machining quality and assembly safety of the wheel hub. At the same time, this utility model has a certain degree of versatility, shortening the installation and adjustment time between different products and improving changeover efficiency.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy wheel hub manufacturing technology, and in particular to a wheel hub machining positioning device. Background Technology

[0002] As a core component for safe driving, the assembly dimensional accuracy of aluminum alloy wheels directly affects the safety of drivers, thus requiring stringent precision in machining. With the increasing adoption of forged wheels in passenger vehicles, their processing commonly employs forging and milling. The process involves rough milling on the front of the wheel, followed by turning, and then machining at a machining center to complete the bolt holes and valve holes. The positional accuracy of the bolt holes and valve holes relative to the windows, processed at the machining center, is particularly critical. However, current wheel manufacturing utilizes a fully automated production model, lacking a secondary calibration step. This results in significant angular deviations in the bolt holes and valve holes after machining, severely impacting the assembly quality and safety of the wheels. Analysis reveals that the core cause of this problem lies in insufficient positioning accuracy before the wheel enters the machining center, failing to provide a precise reference for subsequent processing.

[0003] Therefore, there is an urgent need to develop a positioning device for wheel hub machining to improve the positioning accuracy before machining center and solve the above-mentioned technical defects. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of bolt hole and valve hole angle deviation caused by insufficient positioning accuracy during wheel hub processing, and to provide a wheel hub machining positioning device and an automated machining positioning device to improve the positioning accuracy of the wheel hub before entering the machining center and ensure the accuracy of angles in subsequent processing.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A wheel hub machining positioning device includes a base, on which a positioning turntable is rotatably connected. A central shaft is provided at the center of the positioning turntable corresponding to the center hole of the wheel hub. The device also includes a positioning block for positioning the wheel hub at a horizontal angle. The positioning block is made according to the shape of the wheel hub window. A telescopic cylinder is connected to the positioning block. A wedge-shaped guide surface is provided on the side of the positioning block to guide the positioning block to be embedded into the wheel hub window.

[0007] Preferably, the positioning turntable has several radial blocks arranged circumferentially on the wheel lip corresponding to the wheel hub, which are used to circumferentially abut against the wheel lip.

[0008] Preferably, the radial block has an L-shaped structure including a cross pillow and a stand. The cross pillow protrudes from the upper surface of the positioning turntable and serves as a support structure for axial positioning of the hub, while the stand serves as a support structure for radial positioning of the hub.

[0009] Preferably, the support is provided with a guide slope at the wheel lip portion corresponding to the wheel hub to facilitate wheel hub installation.

[0010] Preferably, the positioning turntable has a radial groove, the radial block is slidably connected to the groove, the radial block has a through hole, and the groove has a number of screw holes corresponding to the radial dimensions of different wheel hubs. The locking bolt passes through the through hole and is screwed into the screw hole.

[0011] Preferably, the bottom of the positioning turntable is provided with a central rotating shaft, and the base is provided with a shaft hole corresponding to the central rotating shaft, and the central rotating shaft is rotatably connected to the shaft hole.

[0012] Preferably, the central rotating shaft is a tapered shaft, and the shaft hole is a matching tapered shaft hole with the same taper, wherein the tapered shaft and the tapered shaft hole are fitted together.

[0013] Preferably, the base is provided with a plurality of support rollers corresponding to the positioning turntable for auxiliary support of the positioning turntable. The support rollers are arranged along the tangential direction of the positioning turntable, and the axle of the support rollers is rotatably connected to the roller groove of the base. The surface of the support rollers is rolledly connected to the bottom surface of the positioning turntable.

[0014] Preferably, the central shaft is a split structure, which includes a mounting base for fixedly connecting the positioning turntable, and a positioning mandrel is detachably connected to the top of the mounting base. The positioning mandrel mates with the shaft hole of the wheel hub center hole.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention utilizes a liftable positioning block and a pre-milled window to achieve horizontal angular positioning of the wheel hub. Combined with the center positioning of the mandrel and the auxiliary positioning of the radial block, it significantly improves the positioning accuracy of the wheel hub before entering the machining center, effectively reducing the angular deviation of bolt holes and valve holes in the machined product, and ensuring the machining quality and assembly safety of the wheel hub. The position of the radial block in the device can be adjusted according to the product size via a sliding groove, and the positioning block and positioning mandrel can be quickly replaced for different products, greatly shortening the installation and adjustment time between different products and improving the overall production changeover efficiency. The device has high interchangeability; for products of different sizes, there is no need to replace spare parts in large quantities, only the position of the radial block and the positioning block and positioning mandrel need to be adjusted, significantly reducing the manufacturing and maintenance costs of the device. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 for Figure 1 A partial sectional view.

[0020] Figure 3 for Figure 1 A sectional view.

[0021] In the diagram: 10--Base; 11--Shaft hole; 12--Roller groove; 20--Positioning turntable; 21--Slide groove; 22--Central rotating shaft; 30--Central shaft; 31--Mounting seat; 32--Positioning mandrel; 40--Positioning block; 41--Wedge-shaped guide surface; 50--Telescopic cylinder; 60--Radial block; 61--Horizontal block; 62--Upright seat; 63--Guide inclined surface; 70--Supporting roller. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] like Figure 1-3 As shown, a wheel hub machining positioning device includes a base 10, on which a positioning turntable 20 is rotatably connected for axial positioning of the wheel hub. A central shaft 30 is provided at the center of the positioning turntable 20 corresponding to the center hole of the wheel hub for center positioning. It also includes a positioning block 40 for horizontal angular positioning of the wheel hub. The positioning block 40 is custom-made according to the shape of the wheel hub window and positioned corresponding to the window position. A telescopic cylinder 50 is connected to the positioning block 40, providing power for vertical lifting and lowering. A wedge-shaped guide surface 41 is provided on the side of the positioning block 40 to guide it smoothly into the wheel hub window. In use, the wheel hub is placed horizontally on the positioning turntable 20, ensuring that the center hole of the wheel hub passes through the central shaft 30, thus completing the axial and center positioning of the wheel hub. Then, the telescopic cylinder 50 is activated, pushing the positioning block 40 downwards towards the wheel hub window. During this process, the wedge-shaped guide surface 41 of the positioning block 40 will first contact the inner wall of the hub window, and drive the hub and positioning turntable 20 to rotate and adjust at a certain angle in the horizontal direction until the positioning block 40 is fully embedded in the hub window, thereby correcting and positioning the horizontal angle of the hub. After positioning is completed, the robot arm holds the hub with the required angle and enters the machining center for machining of bolt holes, valve holes, etc., effectively ensuring the positional accuracy of the bolt holes, valve holes and hub window.

[0024] In a preferred embodiment, the positioning turntable 20 is provided with a plurality of radial blocks 60 along the circumferential direction corresponding to the wheel lip of the hub, which are used to circumferentially abut against the wheel lip to achieve radial positioning of the hub.

[0025] Preferably, the radial block 60 has an L-shaped structure including a crossbolt 61 and a stand 62. The crossbolt 61 protrudes from the upper surface of the positioning turntable 20, serving as a support structure for axial positioning of the wheel hub, while the stand 62 serves as abutment structure for radial positioning of the wheel hub. Preferably, the stand 62 is provided with a guide slope 63 corresponding to the wheel lip portion of the wheel hub, facilitating wheel hub installation. When placing the wheel hub, it is smoothly placed in position under the guidance of the guide slope 63. The lower edge of the wheel lip is supported on the crossbolt 61 for axial positioning, and the outer edge of the wheel lip abuts against the stand 62 for radial positioning. The spaced crossbolts 61 serve as the axial positioning structure for the wheel hub, reducing the impact of poor wheel lip flatness on axial positioning and further ensuring positioning accuracy.

[0026] Preferably, the positioning turntable 20 has a radially formed groove 21, and the radial block 60 is slidably connected to the groove 21 to achieve position adjustment, thereby meeting the radial positioning requirements of wheel hubs of different sizes. The radial block 60 has a through hole, and the groove 21 has several screw holes corresponding to the radial dimensions of different wheel hubs. Locking bolts pass through the through hole and are screwed into the screw holes, thus locking and fixing the radial block 60. When changing the wheel type, simply remove the locking bolts, slide the radial block 60 along the groove 21 to the appropriate position, and then re-lock it with the locking bolts; the operation is convenient and efficient.

[0027] Preferably, the positioning turntable 20 has a central rotating shaft 22 at its bottom, and the base 10 has a corresponding shaft hole 11 on the central rotating shaft 22, through which the central rotating shaft 22 is rotatably connected. Preferably, the central rotating shaft 22 adopts a tapered shaft design, and the shaft hole 11 is a matching tapered shaft hole 11 with the same taper, with the tapered shaft and the tapered shaft hole 11 engaging on a tapered surface. This tapered surface engagement enables the central rotating shaft 22 to have a self-aligning function, effectively eliminating radial play and further improving the positioning accuracy of the wheel hub.

[0028] Preferably, the base 10 is provided with a plurality of support rollers 70 corresponding to the positioning turntable 20 for auxiliary support of the positioning turntable 20. The support rollers 70 are arranged along the tangential direction of the positioning turntable 20. The axles of the support rollers 70 are rotatably connected in the roller grooves 12 of the base 10, and the surfaces of the support rollers 70 are rolledly connected to the bottom surface of the positioning turntable 20. The provision of support rollers 70 improves the rotational stability of the positioning turntable 20 and further improves the positioning accuracy of the hub.

[0029] Preferably, the central shaft 30 is a split structure, comprising a mounting base 31 fixedly connected to the positioning turntable 20, and a positioning mandrel 32 detachably connected to the top of the mounting base 31. The positioning mandrel 32 mates with the shaft hole 11 of the wheel hub center hole. The split central shaft 30 facilitates the disassembly and replacement of the positioning mandrel 32 for different wheel types, enabling quick adaptation to positioning of various wheel types and improving versatility.

[0030] The above-disclosed embodiments are merely specific examples of this utility model, but this utility model is not limited thereto. For those skilled in the art, any modifications made without departing from the principle of this utility model should be considered as protected by this utility model.

Claims

1. A wheel hub machining positioning device, characterized by: Includes a base (10), on which a positioning turntable (20) is rotatably connected. A central shaft (30) is provided at the center of the positioning turntable (20) corresponding to the center hole of the wheel hub. It also includes a positioning block (40) for positioning the wheel hub at a horizontal angle. The positioning block (40) is made according to the shape of the wheel hub window. A telescopic cylinder (50) is connected to the positioning block (40). A wedge-shaped guide surface (41) is provided on the side of the positioning block (40) to guide the positioning block (40) to be embedded in the wheel hub window.

2. A wheel hub machining positioning device according to claim 1, wherein: The positioning turntable (20) has several radial blocks (60) arranged circumferentially on the wheel lip corresponding to the hub, which are used to circumferentially abut against the wheel lip.

3. A wheel hub machining positioning device according to claim 2, wherein: The radial block (60) has an L-shaped structure including a cross pillow (61) and a stand (62). The cross pillow (61) protrudes from the upper surface of the positioning turntable (20) and serves as a support structure for axial positioning of the hub. The stand (62) serves as a support structure for radial positioning of the hub.

4. A wheel hub machining positioning device according to claim 3, wherein: The stand (62) is provided with a guide slope (63) corresponding to the wheel lip of the hub, so as to facilitate the installation of the hub.

5. A wheel hub machining positioning device according to claim 2, wherein: The positioning turntable (20) has a radial groove (21) and the radial block (60) is slidably connected to the groove (21). The radial block (60) has a through hole and the groove (21) has several screw holes corresponding to the radial dimensions of different wheel hubs. The locking bolt passes through the through hole and is screwed into the screw hole.

6. A wheel hub machining positioning device according to claim 1, wherein: The positioning turntable (20) has a central rotating shaft (22) at its bottom, and the base (10) has a shaft hole (11) corresponding to the central rotating shaft (22), and the central rotating shaft (22) is rotatably connected to the shaft hole (11).

7. A wheel hub machining positioning device according to claim 6, wherein: The central rotating shaft (22) is a tapered shaft, and the shaft hole (11) is a matching tapered shaft hole (11) with the same taper. The tapered shaft and the tapered shaft hole (11) are in conical fit.

8. The wheel hub machining positioning device according to claim 1, characterized in that: The base (10) is provided with several support rollers (70) corresponding to the positioning turntable (20) for auxiliary support of the positioning turntable (20). The support rollers (70) are arranged along the tangential direction of the positioning turntable (20). The axle of the support rollers (70) is rotatably connected in the roller groove (12) of the base (10). The surface of the support rollers (70) is rolled and connected to the bottom surface of the positioning turntable (20).

9. A wheel hub machining positioning device as defined in claim 1, wherein: The central shaft (30) is a split structure, which includes a mounting base (31) that is fixedly connected to the positioning turntable (20). The top of the mounting base (31) is detachably connected to a positioning spindle (32), which is engaged with the hub center hole shaft hole (11).

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