Retaining ring forming die

Abstract

The invention discloses a retaining ring forming die. The retaining ring forming die comprises a concave forming die body and a protruding forming die body, wherein the lower section of a cavity of the concave forming die body is a taper hole with an oblique angle a, the taper hole is in a big-end-up shape, a section of inner cylindrical surface of which the diameter is larger than that of the large end of the taper hole is arranged on the upper portion of the cavity, the diameter of the inner cylindrical surface on the upper portion of the cavity is larger than that of the large end of the taper hole on the lower section of the cavity, at least two curved surfaces which transit smoothly are arranged between the inner cylindrical surface and the inner conical surface of the taper hole, the lower section of the protruding forming die body is a cone with an oblique angle identical to the oblique angle a of the taper hole, a section of a cylindrical surface of which the diameter is larger than that of the large end of the cone is arranged on the upper portion of the protruding forming die body, at least two curved surfaces which transit smoothly are arranged between the cylindrical surface and the outer conical surface of the cone, and top ends of curved surfaces which are connected with the upper end of the inner conical surface are higher than bottom ends of curved surfaces which are connected with the inner cylindrical surface. Compared with the prior art, the retaining ring forming die has the advantages of being capable of preventing thicknesses of arc-shaped connecting portions of retaining rings of wheels from being thinned and preventing end portions of arc-shaped flanges from cutting tires.

Description

technical field [0001] The invention relates to the technical field of stamping die manufacturing, in particular to a die for stamping wheel retaining rings of heavy-duty engineering vehicles. Background technique [0002] The wheel retaining ring is one of the important components of the heavy-duty engineering vehicle wheel. It is installed on the rim to provide axial and radial support for the tire and directly bear the pressure transmitted by the tire. There is a wheel retaining ring for a heavy-duty engineering vehicle, which is a ring-shaped member connected by an arc-shaped rib and a seat ring through an arc-shaped connecting part. The bending direction of the arc-shaped rib and the arc-shaped connecting part On the contrary, the seat ring is a cone with a large top and a small bottom with a bevel, and the bevel has an angle of 5 degrees to 7 degrees. The manufacturing method of this wheel retaining ring is as follows: 1. In the first pressing process, use a retaining...

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Problems solved by technology

[0003] 1. In the defect statistics of engineering wheels, the defects caused by the cracking of the arc connection part of the wheel retaining ring account for more than 60% of the total wheel retaining ring defects. It is formed by expanding the mold. The thickness of the formed wheel retaining ring is smaller than the thickness of the raw material plate, especially the thickness of the arc-shaped joint is only 85% of the thickness of the raw material plate, which reduces the bearing capacity of the wheel retaining ring. After working for a period of time, the wheel retaining ring The arc-shaped connection part of the ring is prone to cracking;

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