Positioning mechanism for finish turning gear ring

Abstract

According to the finish turning gear ring positioning mechanism, the lower portion of the outer side of a center shaft of an E-shaped positioning disc is sleeved with a spring, the position, located above the spring, of the center shaft of the positioning disc is sleeved with a positioning mandrel, an elastic check ring installation groove is formed in the outer edge of the upper portion of the center shaft of the positioning disc, and an elastic check ring is installed in the elastic check ring installation groove; a boss is arranged at the end, located on the positioning disc, of the positioning mandrel, and the chamfer of the boss is matched with the chamfer of the workpiece end face. According to the positioning mechanism for the finish turning gear ring, the chamfer of the positioning mandrel and the chamfer of the workpiece are perfectly matched, the centering effect is achieved when the end face is pressed, the positioning mandrel moves on the matching shaft of the positioning disc along with pressing of the end face workpiece, the floating centering effect is achieved, an inner hole of a part is not deformed, and the machining precision is improved. The purposes of convenient and fast workpiece replacement, high machining precision and high efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear production. Background Art

[0002] The gear ring is a key part of the wheel rim of the automobile. The gear ring is a thin-walled part. During fine turning, it is easy to deform whether the outer diameter is clamped or the inner hole is tightened. The workpiece is usually clamped by positioning the inner hole gap, positioning one end face and pressing the other end face. This method has low positioning accuracy, resulting in low processing accuracy and low production efficiency. Utility Model Content

[0003] In order to solve the above problems existing in the traditional gear ring positioning method, the utility model provides a precision-turned gear ring positioning mechanism.

[0004] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: a precision-turned gear ring positioning mechanism, a spring 3 is set on the lower outer side of the central axis of a "mountain"-shaped positioning disk 1, a positioning spindle 4 is set on the upper part of the spring 3 on the central axis of the positioning disk 1, an elastic retaining ring mounting groove is provided on the upper outer edge of the central axis of the positioning disk 1, and an elastic retaining ring 5 is installed in the elastic retaining ring mounting groove; the positioning spindle 4 is located at one end of the positioning disk 1 and is provided with a boss 6, and the chamfer of the boss 6 matches the chamfer of the end face of the workpiece 1.

[0005] The positioning plate 1 is provided with a convex edge 7 , and the convex edge 7 is located outside the boss 6 .

[0006] The utility model discloses a precision-turned gear ring positioning mechanism, in which the chamfer of the positioning mandrel and the chamfer of the workpiece are perfectly matched, and plays a centering role when the end face is pressed. The positioning mandrel moves on the matching shaft of the positioning plate as the end face workpiece is pressed, and plays a floating centering role, so as not to deform the inner hole of the part, and achieves the purpose of convenient and fast workpiece replacement, high machining accuracy and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a front sectional view of the precision-turned gear ring positioning mechanism of the utility model.

[0008] In the figure: 1. workpiece, 2. positioning plate, 3. spring, 4. positioning spindle, 5. elastic retaining ring for shaft, 6. boss. DETAILED DESCRIPTION

[0009] The precision turning gear ring positioning mechanism of the utility model is as follows Figure 1As shown, a spring 3 is mounted on the lower outer part of the center axis of the "mountain"-shaped positioning disk 1, and a positioning spindle 4 is mounted on the upper part of the spring 3 on the center axis of the positioning disk 1. An elastic retaining ring mounting groove is provided on the upper outer edge of the center axis of the positioning disk 1, and an elastic retaining ring 5 is installed in the elastic retaining ring mounting groove; the positioning spindle 4 is located at one end of the positioning disk 1 and is provided with a boss 6, and the chamfer of the boss 6 matches the chamfer of the end face of the workpiece 1. The positioning disk 1 is provided with a convex edge 7, and the convex edge 7 is located on the outer side of the boss 6. The clearance between the large inner hole thin-walled part being processed and the positioning spindle cannot be too small, otherwise it will be difficult to load and unload, and a large clearance will cause the inner hole and the outer diameter to be out of center. The chamfer of the positioning spindle of the utility model perfectly matches the chamfer of the workpiece, and plays a centering role when the end face is pressed. The positioning spindle 4 moves on the matching shaft of the positioning disk 2 as the end face workpiece is pressed, playing a floating centering role and preventing the inner hole of the part from deforming.

[0010] During operation, the spring 3 is sleeved on the positioning disk 2, the positioning spindle 4 is installed on the positioning disk 2, and finally the elastic retaining ring 5 is embedded in the positioning disk 2. The positioning mechanism is installed on the three-jaw chuck of the lathe, and the axis diameter of the positioning spindle 4 and the runout of the end face of the positioning disk 2 are adjusted. The convex edge 7 is located outside the positioning spindle 4. The space formed by the convex edge 7 and the central axis of the positioning disk 2 plays a limiting role on the positioning spindle 4. The workpiece 1 is installed, and then the end face of the workpiece 1 is pressed, and the outer circle of the workpiece is finely turned. After the workpiece is processed, the pressing end face is removed, the workpiece 1 is removed, and another workpiece is installed to process the next piece.

Claims

1. Fine turning gear ring positioning mechanism, characterized by: A spring (3) is sleeved on the lower outer side of the center shaft of the "mountain"-shaped positioning disk (2); a positioning spindle (4) is sleeved on the upper part of the spring (3) on the center shaft of the positioning disk (2); an elastic retaining ring installation groove is provided on the upper outer edge of the center shaft of the positioning disk (2); an elastic retaining ring (5) is installed in the elastic retaining ring installation groove; and a boss (6) is provided on one end of the positioning spindle (4) located at the positioning disk (2); the chamfer of the boss (6) matches the chamfer of the end face of the workpiece (1).

2. The fine turning gear ring positioning mechanism according to claim 1, characterized in that: The positioning plate (2) is provided with a convex edge (7), and the convex edge (7) is located outside the boss (6).

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