Supporting tool for improving jumping of aluminum alloy hub

Abstract

The utility model provides a supporting tool for improving jumping of an aluminum alloy hub, and relates to the technical field of automobile part manufacturing, the supporting tool is used in cooperation with a chuck and comprises a supporting body, locking mechanisms are arranged on the two sides of the supporting body, a supporting face is arranged in the middle of the supporting body, and a limiting groove is formed in the lower portion of the supporting body. The supporting main body is fixedly connected with the supporting surface of the chuck through a locking mechanism, the limiting groove and the supporting main body are clamped and limited, and the supporting main body is used for positioning an aluminum alloy hub to be machined. By adopting the line contact design combining raised grains and small area, the contact interference points with the aluminum alloy hub to be machined are greatly reduced, and the negative influence of stress release on the final shape of a workpiece after machining is effectively reduced, so that the jumping precision is fundamentally ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts manufacturing, and particularly relates to a support tool for improving runout of an aluminum alloy hub. BACKGROUND

[0002] In the numerical control finishing process of the aluminum alloy hub, especially for large-size hubs of 19-21 inches, due to the inherent plastic deformation characteristics and the initial deformation of the blank, the stress accumulated in the workpiece will be released after clamping and processing on the lathe chuck, resulting in quality problems such as radial runout of the final product exceeding the tolerance, and the rejection rate is high. In the prior art, a support tool is used, and the support surface in contact with the hub process ring is usually straight and has a large area (for example, 30mm*38mm). This surface contact mode not only cannot effectively suppress and adjust the stress release process, but also may exacerbate stress interference due to the large contact surface, which is one of the main reasons for the deformation of the hub after processing and the inability to meet the technical requirements (≤0.3mm) for runout accuracy, seriously affecting production efficiency and cost control.

[0003] The utility model patent with the publication number CN210790078U proposes an adjustment runout tool for hub processing, which sets a connecting shaft on the top of the machine tool connecting piece, and a center positioning expansion sleeve is sleeved on the connecting shaft, and is pressed tightly by a locking piece. After the hub to be processed is sleeved on the connecting shaft, it can be positioned by the center positioning expansion sleeve, and the hub to be processed is pressed tightly by the center positioning expansion sleeve and the locking piece. The device mainly relies on the clamping force of the locking piece and the connecting shaft on the hub hole part, but in the process of use, it is easy to cause the locking to be not in place, the hub to deflect, and affect the next step of processing.

[0004] In order to solve the above problems, it is urgent to develop a support tool for improving the runout of an aluminum alloy hub to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a support tool for improving the runout of an aluminum alloy hub, which is used in cooperation with a three-jaw chuck of a lathe, and aims to solve the problem of radial runout exceeding the tolerance caused by stress release during the fine turning of a large-size aluminum alloy hub.

[0006] To achieve the above purpose, the utility model realizes the following technical scheme: a support tool for improving the runout of an aluminum alloy hub is used in cooperation with a chuck, comprising a support body, the support body has a locking mechanism on both sides, the support body has a support surface in the middle, the support body has a limiting groove below, the support body is fixedly connected with the support surface of the chuck through the locking mechanism, the limiting groove is limited by the chuck, and the support body is used for positioning the aluminum alloy hub to be processed.

[0007] Preferably, the support surface is convex upward relative to the support body, the support surface is a wave structure, the upper surface of the wave structure is a plane structure, and the contact area of the support surface ranges from 10mm*38mm to 15mm*38mm.

[0008] Preferably, the contact area of the support surface specifically ranges from 13mm*38mm.

[0009] Preferably, the locking mechanism is a threaded hole one and a threaded hole two on both sides of the support body, the threaded hole one and the threaded hole two are provided with an enlarged hole above, and the support body is fixedly connected with the chuck bolt.

[0010] Preferably, the support body is a rectangular structure, the four corners of the support body are provided with a plane chamfer, and the length of the plane chamfer on one side of the threaded hole one is greater than the length of the plane chamfer on one side of the threaded hole two.

[0011] Preferably, the limiting groove is an arc-shaped groove, and the shape of the arc-shaped groove corresponds to the shape of the side strut of the chuck.

[0012] Preferably, in use, the support surface is in abutment and fixation with the aluminum alloy hub to be processed.

[0013] Beneficial effects: the support tool for improving run-out of an aluminum alloy hub provided by the utility model has the following beneficial effects compared with the prior art:

[0014] The support surface with a specific wave structure and significantly reduced contact area replaces the traditional straight-line large contact surface, the wave pattern and small area combined line contact design greatly reduces the contact interference points with the aluminum alloy hub to be processed, effectively reduces the negative influence of stress release after processing on the final shape of the workpiece, and thus ensures the run-out precision from the root cause.

[0015] The utility model directly improves the production yield and material utilization rate through optimization design, reduces the cost waste caused by rework and waste products, and simultaneously, the limiting groove and the asymmetric chamfer structure integrated in the tooling also make the installation and positioning more quick and accurate, and the overall stability and operation convenience of processing are enhanced, and the utility model has extremely high economic benefits and popularization value. DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only the embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to the provided drawings without creating creative labor.

[0017] Figure 1 is a structural schematic view of the utility model;

[0018] Figure 2 is a top view of the utility model;

[0019] Figure 3 is a bottom view of the utility model;

[0020] Figure 4 is a front view of the utility model;

[0021] Figure 5 is a use state schematic view of the utility model.

[0022] In the drawing:

[0023] 1, support main body, 2, locking mechanism, 3, support surface, 4, limit slot, 5, threaded hole one, 6, threaded hole two, 7, chuck, 8, aluminum alloy wheel hub to be processed. Specific implementation

[0024] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clear and obvious, combining with the embodiment and the drawing, the utility model is further described in detail, it should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model, the technical scheme of the utility model is described in detail below combining with the embodiment and the drawing, but the protection scope is not limited by this.

[0025] Please refer to Figures 1-5 The utility model provides a technical scheme:

[0026] The support tool is a rectangular block structure, preferably made of 45 steel after quenching and tempering treatment, to ensure its structural strength and wear resistance. The aluminum alloy wheel hub 8 support tool mainly includes a support main body 1, a locking mechanism 2 on both sides of the support main body 1, a support surface 3 in the middle of the support main body 1, a limit slot 4 below the support main body 1, and a chuck 7 fixedly connected to the support main body 1 through the locking mechanism 2. The limit slot 4 is connected to the chuck 7, and the support main body 1 is used for positioning the aluminum alloy wheel hub 8 to be processed.

[0027] The locking mechanism 2 is arranged on both sides of the support main body 1, specifically, the locking mechanism 2 includes threaded hole one 5 and threaded hole two 6 located on both sides of the support main body 1 respectively. The upper part of the threaded hole one 5 and the threaded hole two 6 is expanded, the diameter of the expansion hole is larger than that of the threaded hole, and the depth is slightly larger than the height of the nut of the locking screw, so that the nut can be completely sunk into the expansion hole after the locking screw is screwed in, thereby avoiding interference with the wheel hub blank.

[0028] The middle part of the support body 1 is provided with a support surface 3 which is convex upward compared with the upper surface of the support body 1, and the surface is processed with a wave structure. The wave structure is composed of a series of continuous and smooth arc-shaped protrusions and grooves, but the upper surface is a plane structure as a whole to ensure stable and uniform line contact with the aluminum alloy wheel hub 8 to be processed instead of point contact. The size of the support surface 3 is specifically optimized, and the contact area ranges from 10mm×38mm to 15mm×38mm. In a most preferred embodiment, the contact area of the support surface 3 is specifically 13mm×38mm. This design significantly reduces the contact area with the aluminum alloy wheel hub 8 to be processed, and in combination with the wave design, effectively reduces the interference of stress release on the deformation of the wheel hub after processing.

[0029] An arc-shaped groove 4 is processed in the lower center of the support body 1, which is an arc-shaped groove, and the arc structure is matched with the shape of a support on the lathe three-jaw chuck 7, which is used for quick positioning and clamping limiting when installed to prevent the tooling from moving radially on the chuck 7.

[0030] The four corners of the support body 1 are all processed with flat chamfering to avoid scratching caused by sharp corners and facilitate clamping. It is worth noting that the length L1 of the flat chamfering near one side of the threaded hole 1 5 is greater than the length L2 of the flat chamfering near one side of the threaded hole 2 6. This asymmetric design is to provide clear installation direction indication when the tooling is installed on the chuck 7, to ensure that the support surface 3 is always in the correct orientation, preventing installation in the wrong direction.

[0031] Installation and use process: place the support tooling on the three-jaw chuck 7 of the lathe, align and clamp the limiting groove 4 at the lower part of the support body 1 with the corresponding support on the chuck 7 to achieve preliminary limiting.

[0032] Use the locking screws to pass through the threaded hole 1 5 and the threaded hole 2 6 respectively to firmly bolt and fix the support body 1 on the support surface of the chuck 7. After locking, the screw head sinks into the counterbore and does not protrude above the support surface 3 of the support body 1.

[0033] Lift the aluminum alloy wheel blank to be processed onto the chuck 7, and make the aluminum alloy wheel 8 to be processed accurately aligned and abutted with the wave-shaped support surface 3 of the support body 1.

[0034] Operate the lathe and clamp the wheel blank with the jaws. After clamping, manually test the wheel to observe the initial runout, and confirm that the clamping is correct before starting the numerical control finishing machining.

[0035] Technical effects: By adopting the above supporting tool, especially the wave-shaped supporting surface 3 with an optimized contact area of 13mm*38mm, the radial run-out overproof rate of the 19-21 inch aluminum alloy wheel after finish machining is significantly reduced. According to the actual production verification, the run-out overproof rejection rate is reduced from about 10% when using the traditional tool to about 1.5% after using the tool, effectively improving the production efficiency and product yield, reducing material waste, and improving production efficiency.

[0036] The above is a further detailed description of the present application in combination with specific preferred embodiments. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the present application, a number of simple deductions or substitutions can be made, which should be considered as belonging to the scope of patent protection determined by the submitted claims.

Claims

1. A support fixture for improving runout of aluminum alloy wheel hubs, used in conjunction with a chuck, characterized in that: The device includes a support body with locking mechanisms on both sides, a support surface in the middle, and a limiting groove at the bottom. The support body is fixedly connected to the support surface of the chuck through the locking mechanisms, and the limiting groove engages with the chuck for positioning. The support body is used to position the aluminum alloy wheel hub to be processed.

2. The support fixture according to claim 1, characterized in that: The supporting surface protrudes upward from the supporting body. The supporting surface has a wave structure, and the upper surface of the wave structure is a planar structure. The contact area of ​​the supporting surface ranges from 10mm×38mm to 15mm×38mm.

3. The supporting fixture according to claim 2, characterized in that: The specific contact area of ​​the support surface is 13mm × 38mm.

4. The support fixture according to claim 1, characterized in that: The locking mechanism has a threaded hole 1 and a threaded hole 2 on both sides of the support body, and an enlarged hole above the threaded hole 1 and the threaded hole 2. The support body is bolted and fixed to the chuck.

5. The supporting fixture according to claim 4, characterized in that: The supporting body is a rectangular structure, and the four corners of the supporting body have flat chamfers. The length of the flat chamfer on one side of the threaded hole is greater than the length of the flat chamfer on one side of the threaded hole.

6. The supporting fixture according to claim 2, characterized in that: The limiting groove is an arc-shaped groove, and the shape of the arc-shaped groove corresponds to the shape of the support column on one side of the chuck.

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