Fine die forging hub centering clamp

Abstract

The utility model relates to the technical field of work fixtures for machining, in particular to a precision die forging hub centering fixture which comprises a petal positioning core die, a pin shaft, a supporting column and a connecting base, protrusions and grooves are distributed on the periphery of the petal positioning core die, the whole connecting base is in a disc shape, and the pin shaft is arranged on the connecting base. The connecting base is provided with three evenly-distributed vertically-upward counter bores, the bottoms of the counter bores are threaded holes, the supporting columns are installed in the counter bores in the connecting base through threads, the supporting columns are cylindrical, the number of the supporting columns is three, installation holes are formed in the tops of the supporting columns, and the pin shafts are embedded into the installation holes in a sliding fit mode. The petal positioning core mold is provided with an installation hole corresponding to the pin shaft, the petal positioning core mold is installed above the supporting column through the pin shaft, accurate matching of the hub inner cavity molded surface and the petal positioning core mold can be achieved, the accuracy of the hub reference center is guaranteed, the hub machining reference is accurate, use is convenient, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of workholding fixtures for machining, in particular to a centering fixture for precision die-forged wheels. Background Art

[0002] During the machining process of precision die-forged wheels, it is necessary to machine the datum before precision turning to ensure the accurate positioning and dimensions of the wheels during precision turning. Therefore, the accurate machining of the datum is also very important. A fixture is needed to position the wheels to improve the machining accuracy and production efficiency of the datum and ensure the machining quality. Summary of the Utility Model

[0003] To solve the problems mentioned in the above background art, the utility model provides a centering fixture for precision die-forged wheels.

[0004] As Figure 2 shown, convex keys are distributed on the inner wall of the machined wheel cavity, and the connections between both sides of the convex keys and the inner wall are arc surfaces.

[0005] The utility model discloses the following technical solutions: A centering fixture for precision die-forged wheels, comprising a petal-shaped positioning core mold, a pin shaft, support columns and a connection base. The petal-shaped positioning core mold is integrally hollow and petal-shaped. Protrusions and grooves are distributed around the petal-shaped positioning core mold. The grooves are provided with arc surfaces corresponding to the arc surfaces of the inner wall of the wheel. The outer surface of the protrusions cooperates with the inner wall of the wheel, and the grooves cooperate with the convex keys on the inner wall of the wheel. The connection base is integrally disc-shaped. The connection base is provided with three uniformly distributed vertical counterbores, and the bottoms of the counterbores are threaded holes. The support columns are installed in the counterbores on the connection base through threads. The support columns are cylindrical and the number is three. The tops of the support columns are provided with mounting holes. The pin shaft is slidably inserted into the mounting holes. The petal-shaped positioning core mold is provided with mounting holes corresponding to the pin shaft. The petal-shaped positioning core mold is installed above the support columns through the pin shaft. The upper end surfaces of the three support columns are at the same height.

[0006] Further, the material of the petal-shaped positioning core mold is 45 steel.

[0007] Further, flat surfaces are machined on both sides of the middle position of the surface of the support columns.

[0008] Further, the connection base is also provided with fixing holes.

[0009] Advantageous Effects: Compared with the prior art, the centering fixture for precision die-forged wheels of the utility model can achieve the accurate cooperation between the inner cavity profile of the wheel and the petal-shaped positioning core mold, ensure the accuracy of the reference center of the wheel, accurately machine the reference of the wheel, be convenient to use, simple to operate, and can effectively ensure the machining quality while improving the machining efficiency. Brief Description of the Drawings

[0010] Figure 1 is the overall structural schematic diagram of the present utility model;

[0011] Figure 2 is the schematic diagram of the wheel hub;

[0012] Figure 3 is the assembly schematic diagram of the wheel hub and the precision die forging wheel hub centering fixture;

[0013] In the figure: 1 - petal positioning core die, 11 - protrusion, 12 - groove, 2 - pin shaft, 3 - support column, 31 - plane, 4 - connecting base, 41 - counterbore, 42 - fixing hole, 5 - wheel hub, 51 - convex key. Specific embodiments

[0014] As Figure 2 shown, convex keys 51 are distributed on the inner wall of the inner cavity of the wheel hub 5, and the joints between both sides of the convex keys 51 and the inner wall are arc surfaces. As Figures 1 to 3 shown, a precision die forging wheel hub centering fixture includes a petal positioning core die 1, a pin shaft 2, a support column 3 and a connecting base 4. The petal positioning core die 1 is integrally hollow and petal-shaped. Protrusions 11 and grooves 12 are distributed around the petal positioning core die 1. An arc surface corresponding to the arc surface of the inner wall of the wheel hub 5 is provided in the groove 12. The outer surface of the protrusion 11 cooperates with the inner wall of the wheel hub 5, and the groove 12 cooperates with the convex key 51 on the inner wall of the wheel hub 5, which can effectively realize the centering of the wheel hub 5 and ensure the accuracy of the machining reference. The connecting base 4 is integrally disc-shaped. Three uniformly distributed vertical counterbores 41 are provided on the connecting base 4, and the bottom of the counterbore 41 is a threaded hole. The support column 3 is installed in the counterbore 41 on the connecting base 4 by threads. The support column 3 is cylindrical and the number is three. An installation hole is provided at the top of the support column 3. The pin shaft 2 is slidably inserted into the installation hole. An installation hole corresponding to the pin shaft 2 is provided on the petal positioning core die 1. The petal positioning core die 1 is installed above the support column 3 through the pin shaft 2. The upper end faces of the three support columns 3 are at the same height. The setting of the counterbore 41 can ensure the stable installation position of the support column 3 and also ensure that the petal positioning core die 1 is horizontally arranged.

[0015] The material of the petal positioning core die 1 is 45 steel, which effectively guarantees its strength and durability; plane 31 is machined on both sides of the middle position of the surface of the support column 3, which is convenient for using tools to install and tighten the support column 3; fixing holes 42 are also provided on the connecting base 4, which is convenient for fixedly installing the connecting base 4 on the machine tool workbench.

[0016] In use, horizontally install and fix the connecting base 4 on the machine tool workbench, install the support column 3 in the counterbore 41 on the connecting base 4 so that the top end faces of the three support columns 3 are at the same height, install the pin shaft 2 in the mounting hole at the top of the support column 3, and install the petal positioning core mold 1 above the support column 3 through the pin shaft 2. The hub 5 is installed in cooperation with the petal positioning core mold 1, and then the hub can be machined. The positioning is accurate, and it is convenient and fast to pick and place the hub, which can ensure the accuracy of the reference center of the hub and the accuracy of the machining hub reference. The precision die-forged hub centering fixture of the present invention has a simple and reliable structure, is easy to use, and has simple operation. It can effectively guarantee the machining quality while improving the machining efficiency.

[0017] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A precision die forging hub centering fixture, comprising a petal positioning core die (1), a pin (2), a support column (3) and a connecting base (4), characterized in that: The petal positioning core mold (1) is in the shape of a hollow petal as a whole. The petal positioning core mold (1) is provided with protrusions (11) and grooves (12) around it. The groove (12) is provided with an arc surface corresponding to the arc surface of the inner wall of the wheel hub (5). The outer surface of the protrusion (11) cooperates with the inner wall of the wheel hub (5), and the groove (12) cooperates with the convex key (51) on the inner wall of the wheel hub (5). The connecting base (4) is in the shape of a disk as a whole. The connecting base (4) is provided with three evenly distributed vertically upward countersunk holes ( 41), the bottom of the countersunk hole (41) is a threaded hole, the support column (3) is installed in the countersunk hole (41) on the connecting base (4) through a thread, the support column (3) is cylindrical, and there are three of them, the top of the support column (3) is provided with a mounting hole, the pin shaft (2) is slidably inserted into the mounting hole, the petal positioning core mold (1) is provided with a mounting hole corresponding to the pin shaft (2), the petal positioning core mold (1) is installed above the support column (3) through the pin shaft (2), and the upper end surfaces of the three support columns (3) are at the same height.

2. The precision die forging hub centering fixture according to claim 1, characterized in that: The petal positioning core mold (1) is made of No. 45 steel.

3. The precision die forging hub centering fixture according to claim 1, characterized in that: Flat surfaces (31) are machined on both sides of the middle position of the surface of the support column (3).

4. The precision die forging hub centering fixture according to claim 1, characterized in that: The connecting base (4) is also provided with a fixing hole (42).

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