Bolt hole back cavity tool and bolt hole machining device

Abstract

The utility model discloses a bolt hole back cavity tool and a bolt hole processing device.The bolt hole back cavity tool comprises a tool body, the tool body is provided with at least one pair of positioning holes, and the two positioning holes in each pair are symmetrically arranged along the circumference coaxial with the tool body; the bolt hole machining device comprises a bolt hole back cavity tool, a positioning column and a positioning ring. The bottom end of the positioning column is connected with a tool body through a first positioning bolt arranged in a positioning hole. The bottom end of the positioning ring is connected with the top end of the positioning column through a second positioning bolt; through accurate positioning and a stable machining process, the size precision and the position precision of the back cavity of the bolt hole are ensured, the requirement for high quality of hubs in the automobile manufacturing industry is met, and the market competitiveness of products is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical processing tooling technology, and in particular relates to a bolt hole back cavity tooling and a bolt hole processing device. Background Technology

[0002] Currently, the machining of bolt holes, such as those in wheel hubs, is prone to defects, including back cavity scratches, rough hole walls, diameter deviations, and insufficient positional accuracy. These problems often stem from the manual labor involved in traditional machining methods, inaccurate positioning, and vibrations during the machining process. Furthermore, existing tooling equipment often suffers from complex operations, low efficiency, and difficulty in guaranteeing machining quality when machining bolt hole back cavities; this also significantly impacts vehicle safety. Utility Model Content

[0003] The purpose of this utility model is to provide a bolt hole back cavity tooling and a bolt hole processing device to solve the problem in the prior art that hooking damage is easily caused at, for example, wheel hub bolt hole positions, affecting the overall safety performance of the wheel hub; it facilitates the use of precise positioning and a stable processing process to ensure the dimensional and positional accuracy of the bolt hole back cavity, meeting the high-quality requirements of industries such as automobile manufacturing for wheel hubs, and enhancing the market competitiveness of the product.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, the present invention provides a bolt hole back cavity tooling, including a tooling body, wherein the tooling body has at least one pair of positioning holes, and two of the positioning holes in each pair are arranged symmetrically along a circumference coaxial with the tooling body.

[0006] In this utility model, the bolt hole back cavity fixture is used with the A-side of the wheel hub facing down and the D-side facing up. A pair of positioning holes are selected on the fixture body so that they correspond to the lower part of a pair of symmetrical PCD holes on the wheel hub. This facilitates the positioning of the wheel hub and the fixture body of the bolt hole back cavity fixture, and the bolt holes are chamfered from the D-side.

[0007] Preferably, the positioning hole is configured as a stepped hole, wherein the upper inner diameter of the stepped hole is larger than the lower inner diameter.

[0008] Preferably, all the positioning holes are arranged on the same circumference.

[0009] Preferably, a connecting hole is provided at the center of the tooling body.

[0010] Preferably, the connecting hole is configured as a stepped hole, wherein the upper inner diameter of the stepped hole is larger than the lower inner diameter.

[0011] Preferably, the tooling body is configured as a disc.

[0012] Secondly, this utility model provides a bolt hole processing device, including the bolt hole back cavity tooling as described in the first aspect of this utility model, and further including a positioning post and a positioning ring. The bottom end of the positioning post is connected to the tooling body by a first positioning bolt disposed in the positioning hole; the bottom end of the positioning ring is connected to the top end of the positioning post by a second positioning bolt.

[0013] The bolt hole processing device of this utility model connects the wheel hub to the tooling body of the bolt hole back cavity tooling through the positioning pin and the positioning ring, positions the wheel hub, and performs chamfering treatment on its D surface for the bolt hole.

[0014] Preferably, the top end of the positioning post has a positioning groove, and the bottom end of the positioning ring has a positioning protrusion, which is disposed in the positioning groove.

[0015] Preferably, a lifting seat is provided below the bolt hole back cavity tooling, and the lifting seat is connected to the tooling body by connecting bolts.

[0016] Preferably, the lifting seat is movably mounted on the clamp, and a limiting bolt is provided on the lifting seat below the clamp.

[0017] The bolt hole back cavity tooling and bolt hole processing device provided by this utility model have the following beneficial effects:

[0018] The bolt hole back cavity fixture and bolt hole processing device provided by this utility model can solve the problem in the prior art that hooking damage easily occurs at, for example, wheel hub bolt hole positions, affecting the overall safety performance of the wheel hub. It facilitates a stable processing process through precise positioning between the wheel hub and the bolt hole back cavity fixture, avoiding hooking damage at the wheel hub bolt hole positions and ensuring the overall safety performance of the wheel hub. It also ensures the safety and stability of the processing process, and through precise positioning and a stable processing process, ensures the dimensional accuracy, positional accuracy, and efficiency of the bolt hole back cavity, reducing the complexity of manual operation. This meets the high-quality requirements of industries such as automobile manufacturing, enhancing the market competitiveness of products. Each pair of positioning holes can also correspond to a pair of PCD holes for different wheel types, thus making the bolt hole back cavity fixture applicable to various wheel types and expanding its application range. Attached Figure Description

[0019] Figure 1 This is a front sectional view of a bolt hole back cavity tooling provided in an embodiment of this utility model.

[0020] Figure 2 This is a top view of a bolt hole back cavity tooling provided in an embodiment of this utility model.

[0021] Figure 3 This is a front sectional view of a bolt hole processing device provided in an embodiment of this utility model.

[0022] Figure 4 This is a front sectional view of the positioning column of the bolt hole processing device provided in an embodiment of this utility model.

[0023] Figure 5 yes Figure 4 Sectional view along the AA direction.

[0024] Figure 6 This is a front sectional view of the positioning ring of the bolt hole processing device provided in an embodiment of this utility model.

[0025] Figure reference numerals:

[0026] 1. Wheel hub, 101. PCD hole, 2. Bolt hole drill bit, 3. Positioning ring, 301. Second positioning bolt, 302. Positioning protrusion, 4. Positioning pin, 401. First positioning bolt, 402. Positioning groove, 5. Tooling body, 501. Positioning hole, 502. Connecting hole, 6. Lifting seat, 601. Limit bolt, 7. Clamp. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] Please refer to Figure 1 and Figure 2 This embodiment provides a bolt hole back cavity tooling, including a tooling body 5. The tooling body 5 has at least one pair of positioning holes 501, and the two positioning holes 501 in each pair are arranged symmetrically along the circumference coaxial with the tooling body 5.

[0030] The bolt hole back cavity tooling of this embodiment can be used in conjunction with the reference. Figure 3 With the A-side of hub 1 facing downwards and the D-side upwards, select a pair of positioning holes 501 on the tooling body 5 corresponding to the two symmetrical PCD holes 101 of the wheel type, so that the two positioning holes 501 are respectively positioned below the two symmetrical PCD holes 101; then, the tooling body 5 of the bolt hole back cavity tooling can be connected to hub 1 through positioning pin 4 to position hub 1, and chamfer the bolt holes from the D-side. PCD (Pitch Circle Diameter) refers to the diameter of a circle formed by equally spaced holes or screw holes. It is commonly used to describe the installation position of screws, nuts, hubs, and other fasteners.

[0031] The positioning hole 501 can be provided with at least two pairs of positioning holes 501. Each pair of positioning holes 501 can correspond to a pair of PCD holes 101 of different wheel type hubs 1, so that the bolt hole back cavity tooling can be applied to hubs 1 of various wheel types.

[0032] Specifically, the positioning hole 501 is set as a stepped hole, with the upper inner diameter of the stepped hole being larger than the lower inner diameter, thus forming a countersunk screw hole.

[0033] Specifically, all positioning holes 501 are arranged on the same circumference.

[0034] Specifically, a connection hole 502 is provided at the center of the tooling body 5.

[0035] Specifically, the connecting hole 502 is set as a stepped hole, with the upper inner diameter of the stepped hole being larger than the lower inner diameter, thus forming a countersunk screw hole.

[0036] Specifically, the tooling body 5 is designed as a disc.

[0037] Example 2

[0038] Please refer to Figures 3 to 6 This embodiment provides a bolt hole processing device, including a bolt hole back cavity tooling as in Embodiment 1, and also includes a positioning post 4 and a positioning ring 3. The bottom end of the positioning post 4 is connected to the tooling body 5 by a first positioning bolt 401 disposed in the positioning hole 501; the bottom end of the positioning ring 3 is connected to the top end of the positioning post 4 by a second positioning bolt 301.

[0039] In this embodiment, the bolt hole processing device connects and positions the bolt hole back cavity tooling to the hub 1 through the positioning pin 4 and the positioning ring 3. The top surface of the positioning ring 3 contacts the A surface of the hub 1. The bolt hole can be chamfered from the D surface of the hub 1 by the bolt hole drill bit 2.

[0040] The first positioning bolt 401 can be a countersunk bolt. The positioning ring 3 can have a stepped countersunk screw hole, the top of the positioning post 4 can have a screw hole, and the second positioning bolt 301 can be a countersunk bolt. The two can be connected by the countersunk bolts set in the countersunk screw hole and the screw hole.

[0041] Specifically, a positioning groove 402 is provided at the top of the positioning post 4, and a positioning protrusion 302 is provided at the bottom of the positioning ring 3. The positioning protrusion 302 is located in the positioning groove 402.

[0042] The positioning groove 402 can be set as a rectangular groove, and the positioning protrusion 302 can be set as a rectangular columnar protrusion, which facilitates a reliable positioning connection between the positioning post 4 and the positioning ring 3.

[0043] Specifically, a lifting seat 6 is provided below the bolt hole back cavity tooling, and the lifting seat 6 is connected to the tooling body 5 by connecting bolts. The connecting bolts can be countersunk bolts. This facilitates the lifting seat 6 to move the bolt hole back cavity tooling up and down, so that the top surface of the positioning ring 3 contacts the A surface of the hub 1 for positioning.

[0044] The connecting bolts are screwed into the connecting holes.

[0045] Specifically, the lifting seat 6 is movably mounted on the clamp 7, and the lifting seat 6 is provided with a limit bolt 601 below the clamp 7.

[0046] For example, the clamp 7 has a through hole, and the lifting seat 6 is movably disposed in the through hole. The lifting seat 6 has a limiting screw hole on its side wall below the through hole, and a limiting bolt 601 is screwed into the limiting screw hole. When the lifting seat 6 needs to move up and down along the clamp 7, the limiting bolt 601 is removed; when the lifting seat 6 moves up and down along the clamp 7 to the desired position, the limiting bolt 601 is screwed into the limiting screw hole, so that the limiting bolt 601 contacts the bottom surface of the clamp 7, thereby fixing the lifting seat 6 in the desired position.

[0047] The above embodiments are merely illustrative examples and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

[0048] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0049] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to has a specific orientation, or is constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A bolt hole back cavity tooling characterized by, The tooling body includes a tooling body with at least one pair of positioning holes, and two of the positioning holes in each pair are arranged symmetrically along a circumference coaxial with the tooling body.

2. The bolt hole back cavity tooling according to claim 1, characterized in that, The positioning hole is configured as a stepped hole, wherein the upper inner diameter of the stepped hole is larger than the lower inner diameter.

3. The bolt hole back cavity tooling of claim 1, wherein, All the aforementioned positioning holes are arranged on the same circumference.

4. The bolt hole back cavity tooling of claim 1, wherein, A connection hole is provided at the center of the tooling body.

5. The bolt hole back cavity tooling of claim 4, wherein, The connecting hole is configured as a stepped hole, wherein the upper inner diameter of the stepped hole is larger than the lower inner diameter.

6. The bolt hole back cavity tooling of any one of claims 1-5, wherein, The tooling body is configured as a disc.

7. A bolt hole machining device characterized by comprising: The bolt hole back cavity tooling as described in any one of claims 1-6 further includes: The bottom end of the positioning column is connected to the tooling body via a first positioning bolt set in the positioning hole; The bottom end of the positioning ring is connected to the top end of the positioning post by a second positioning bolt.

8. The bolt hole machining apparatus according to claim 7, characterized by The top of the positioning post has a positioning groove, and the bottom of the positioning ring has a positioning protrusion, which is located in the positioning groove.

9. The bolt hole machining apparatus according to claim 7 or 8, characterized by A lifting seat is provided below the bolt hole back cavity tooling, and the lifting seat is connected to the tooling body by connecting bolts.

10. The bolt hole machining apparatus according to claim 9, characterized by The lifting seat is movably mounted on the clamp, and a limiting bolt is provided on the lower part of the lifting seat below the clamp.

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