CN216029568U - Elastic centering tool for machining center - Google Patents
Elastic centering tool for machining center Download PDFInfo
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- CN216029568U CN216029568U CN202121727273.8U CN202121727273U CN216029568U CN 216029568 U CN216029568 U CN 216029568U CN 202121727273 U CN202121727273 U CN 202121727273U CN 216029568 U CN216029568 U CN 216029568U
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- positioning sleeve
- hole
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Abstract
The utility model discloses an elastic centering tool for a machining center. In a conventional hub bolt hole machining procedure, a fixed-diameter mandrel cannot achieve the optimal centering effect due to the change of the diameter of a central hole, so that products are scrapped; the expansion mandrel can be made larger as the diameter of the central bore becomes larger, but is expensive, resulting in extremely high manufacturing costs. The utility model comprises a positioning sleeve, a base, a positioning rod, a compression spring, a retainer ring, a set screw and a supporting block, wherein the two ends of the positioning sleeve are cylindrical, and the middle section of the positioning sleeve is conical. The hub is pressed down by the gravity of the hub and is matched with the positioning rod and the compression spring in a vertically upward force manner, so that the central hole of the hub is matched and tightly propped against the conical surface of the positioning sleeve, the hub achieves a centering effect, and the machining position precision of the hub bolt hole is improved.
Description
Technical Field
The utility model belongs to the technical field of hub product processing, and particularly relates to an elastic centering tool for a processing center.
Background
The automobile hub is a part for mounting an axle in the center of a wheel and is an important component of an automobile part. The bolt holes of the wheel hub are important composition parameters, the wheel hub is locked on the axle mainly, and the driving stability and comfort of driving are ensured, so that the wheel hub has a direct relation with the bolt holes of the wheel hub. The location of the bolt holes determines the outside diameter (tire) and axle concentricity of the wheel after installation: if the concentricity is out of tolerance, the characteristics of vibration and poor stability of the whole vehicle can occur during high-speed running, and the main reason is that the radial runout of an axle and the outer diameter (tire) of a hub is out of tolerance due to the out-of-tolerance concentricity, so the position degree of a hub bolt hole is a key assembly parameter;
the conventional hub bolt hole processing procedure is completed by a processing center and a forming drill bit, the positioning mode is that a centering shaft (a center hole) and a positioning rod are adopted to fix the position and the rotating angle of a hub, the centering shaft is divided into a fixed diameter mandrel and an expansion mandrel, and the two types of mandrels have respective advantages and disadvantages: the fixed diameter mandrel cannot achieve the optimal centering effect due to the change of the diameter of the central hole, and the position tolerance is easily out of tolerance due to the fact that the central hole is too large, so that products are scrapped; the expansion mandrel can be enlarged along with the diameter of the central hole to achieve an ideal centering effect, but the expansion mandrel is expensive, and the size of the central hole of the hub on the market is various, so that the manufacturing cost is extremely high, and many small enterprises cannot adopt the expansion mandrel in batches.
Disclosure of Invention
In order to make up for the defects of the prior art, the utility model provides the elastic centering tool for the machining center, which can ensure that the machining precision of the hub bolt hole meets the design requirement and reduce the production cost of a product.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
an elastic centering tool for a machining center is arranged on a working table of the machining center and comprises a base, wherein the base is in a step shape, a round hole is formed in the center of the base, one end of the base is fixedly connected with the working table of the machining center, and the other end of the base is coaxially and fixedly connected with a retainer ring; a circular through hole is formed in the center of the retainer ring, and the diameter of the circular through hole is smaller than that of the circular hole in the center of the base;
the compression spring is arranged in a round hole in the center of the base, one end of the compression spring is in contact with the bottom surface of the round hole, and the other end of the compression spring is in contact with one end surface of the positioning rod; the positioning rod is in a stepped cylindrical shape, and the other end of the positioning rod penetrates through a circular through hole in the retainer ring;
the two ends of the positioning sleeve are cylindrical, the middle section of the positioning sleeve is conical, the cylindrical diameters of the two ends of the positioning sleeve are respectively the minimum diameter of the central hole of the hub and the maximum diameter of the central hole of the hub, the diameters of the conical two ends of the middle section of the positioning sleeve are respectively equal to the cylindrical diameters of the two ends of the positioning sleeve, and a circular through hole is formed in the center of the positioning sleeve; one end of the positioning rod is arranged in a circular through hole at the center of the positioning sleeve and is fixedly connected with the positioning sleeve through a set screw;
the positioning sleeve is arranged in the central hole of the hub; two end faces of the supporting block are respectively contacted with the working table surface of the machining center and the wheel rim of the wheel hub;
specifically, the base is fixedly connected with the working table surface of the machining center through screws;
specifically, the base and the retainer ring are fixedly connected by screws;
specifically, the positioning rod is in clearance fit with the base and the retainer ring.
The utility model has the beneficial effects that:
1) the two ends of the positioning sleeve are cylindrical, and the middle section of the positioning sleeve is conical, so that the hub centering deviation caused by the diameter change of the central hole of the hub is avoided, and the machining precision of the hub bolt hole is ensured to meet the design requirement;
2) aiming at different products, the processing requirements can be met only by replacing the corresponding positioning sleeve, and the processing period of the product is shortened;
3) the utility model has simple structure and convenient installation, reduces the production cost for enterprises, improves the profit margin and has wide market prospect.
Drawings
FIG. 1 is a schematic diagram of the operation of the present invention;
FIG. 2 is a schematic view of a positioning sleeve according to the present invention;
in the figure, 1-a positioning sleeve, 2-a base, 3-a positioning rod, 4-a compression spring, 5-a retainer ring, 6-a set screw, 7-a hub and 8-a supporting block.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
FIG. 1 is a schematic diagram of the present invention. As shown in figure 1, the utility model comprises a locating sleeve 1, a base 2, a locating rod 3, a compression spring 4, a retainer ring 5, a set screw 6 and a supporting block 8;
the base 2 is in a stepped cylindrical shape and is divided into two shaft sections, a threaded connecting hole is formed in the large end of the base and is fixedly connected with a working table top of a machining center through a screw, and a circular hole is formed in the center of the base 2; one end of the compression spring 4 is contacted with the bottom surface of the round hole at the center of the base 2, and the other end is contacted with one end surface of the positioning rod 3; the positioning rod 3 is in clearance fit with the base 2;
the positioning rod 3 is in a stepped cylinder shape and is divided into two shaft sections; the retainer ring 5 is circular, a circular through hole is formed in the center of the retainer ring, and the diameter of the circular through hole is smaller than that of a circular hole in the center of the base 2; the positioning rod 3 penetrates through the check ring 5, and the check ring 5 is fixedly connected with the base 2 through a screw; the positioning rod 3 is in clearance fit with the retainer ring 5;
as shown in the schematic structural diagram of the positioning sleeve in fig. 2, two ends of the positioning sleeve 1 are cylindrical, the middle section is conical, and the cylindrical diameters of the two ends of the positioning sleeve 1 are the minimum diameter of the central hole of the hub and the maximum diameter of the central hole of the hub respectively; the diameters of two conical ends of the middle section of the positioning sleeve 1 are respectively equal to the diameters of cylindrical ends of the positioning sleeve 1, and a circular through hole is formed in the center of the positioning sleeve 1; one end of a positioning rod 3 is arranged in a circular through hole at the center of the positioning sleeve 1 and is fixedly connected with the positioning sleeve 1 through a set screw 6;
arranging the positioning sleeve 1 in a central hole of the hub 7; the supporting block 8 is a cuboid, and the upper end face and the lower end face of the supporting block are respectively contacted with the working table surface of the machining center and the wheel rim of the wheel hub 7.
The working principle of the utility model is as follows: the conical surface of the positioning sleeve 1 is a working contact centering area of the tool, and the central hole changes in the range of the conical surface of the positioning sleeve all the time along with the change of the size of the central hole of the hub in a tolerance range; the wheel hub 7 is pressed downwards by means of the gravity of the wheel hub 7 and is in vertical upward force fit with the positioning rod 3 and the compression spring 4, so that the center hole of the wheel hub 7 is tightly matched and pressed with the conical surface of the positioning sleeve 1, the wheel hub 7 achieves the centering effect, and the machining position precision of the wheel hub bolt hole is improved.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "secured" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral to; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model is not limited to the examples, and any equivalent changes to the technical solution of the utility model by a person skilled in the art after reading the description of the utility model are covered by the claims of the utility model.
Claims (4)
1. The utility model provides a machining center elasticity centering frock, installs in machining center table surface, its characterized in that: the base (2) is in a step shape, a round hole is formed in the center, one end of the base is fixedly connected with the working table surface of the machining center, and the other end of the base is coaxially and fixedly connected with the retainer ring (5); a circular through hole is formed in the center of the retainer ring (5), and the diameter of the circular through hole is smaller than that of a circular hole in the center of the base (2);
the compression spring (4) is arranged in a round hole in the center of the base (2), one end of the compression spring is in contact with the bottom surface of the round hole, and the other end of the compression spring is in contact with one end surface of the positioning rod (3); the positioning rod (3) is in a stepped cylindrical shape, and the other end of the positioning rod penetrates through a circular through hole in the retainer ring (5);
the two ends of the positioning sleeve (1) are cylindrical, the middle section of the positioning sleeve is conical, and the cylindrical diameters of the two ends of the positioning sleeve (1) are the minimum value and the maximum value of the diameter of the central hole of the hub respectively; the diameters of two conical ends of the middle section of the positioning sleeve (1) are respectively equal to the diameters of cylindrical ends of the positioning sleeve (1), and a circular through hole is formed in the center of the positioning sleeve (1); one end of the positioning rod (3) is arranged in a circular through hole at the center of the positioning sleeve (1) and is fixedly connected with the positioning sleeve (1) through a set screw (6);
the positioning sleeve (1) is arranged in a central hole of the hub (7); two end faces of the supporting block (8) are respectively contacted with the working table surface of the machining center and the wheel rim of the wheel hub (7).
2. The elastic centering tool for the machining center according to claim 1, characterized in that: the base (2) is fixedly connected with the working table surface of the machining center through screws.
3. The elastic centering tool for the machining center according to claim 2, characterized in that: the base (2) and the retainer ring (5) are fixedly connected by screws.
4. The elastic centering tool for the machining center according to claim 3, characterized in that: the positioning rod (3) is in clearance fit with the base (2) and the check ring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121727273.8U CN216029568U (en) | 2021-07-27 | 2021-07-27 | Elastic centering tool for machining center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121727273.8U CN216029568U (en) | 2021-07-27 | 2021-07-27 | Elastic centering tool for machining center |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216029568U true CN216029568U (en) | 2022-03-15 |
Family
ID=80618230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121727273.8U Active CN216029568U (en) | 2021-07-27 | 2021-07-27 | Elastic centering tool for machining center |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216029568U (en) |
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2021
- 2021-07-27 CN CN202121727273.8U patent/CN216029568U/en active Active
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