Inner tooth ring straightening frame

Abstract

The invention discloses an inner tooth ring straightening frame comprising a base, wherein the base is fixed with a transversely and horizontally arranged fixed shaft through a bracket; one end of the fixed shaft is sleeved with a master part cast iron sleeve along a peripheral direction; the master part cast iron sleeve is in a cylindrical shape and takes the fixed shaft as a rotating shaft; the peripheral surface of the master part cast iron sleeve is conformal with the inner annular surface of an inner tooth ring; and as further improvement, two end surfaces of the master part cast iron sleeve are respectively limited by a limiting structure so that the master part cast iron sleeve can only peripherally rotate along the fixed shaft rather than sliding along an axial direction. The invention has a simple structure and convenience for use; in addition, compared with the traditional mode, the invention has the advantages of good straightening effect and high straightening efficiency, also decreases the struck marks positioned on the surface of a workpiece and enhances the external attractive degree of the workpiece.

Description

technical field [0001] The invention relates to an auxiliary straightening frame for straightening an inner ring gear. Background technique [0002] figure 1 It is a schematic diagram of the external structure of the inner ring gear. As an important part of the wheel-side reduction mechanism of heavy-duty vehicles, the current production process of the inner ring gear is to use medium-carbon steel and medium-carbon alloy steel after quenching and tempering, and then process the tooth shape. Nitriding treatment, the surface hardening layer of the inner ring gear made in this way is shallow, and its load capacity and service life cannot meet the development needs of today's automobile industry; the other is to process the tooth shape after normalizing with low-carbon alloy steel Then carburizing and quenching, the bearing capacity and service life of the inner ring gear made in this way are better than the former, and the cutting performance during tooth profile processing is...

AI Technical Summary

Problems solved by technology

However, due to the shape of the inner ring gear with large holes and thin walls, the deformation is large during carburizing and quenching. Even if press quenching is used, the roundness of the inner ring gear cannot meet the process requirements.

[0003] Therefore, straightening after heat becomes a big problem, such as figure 2 As shown, some manufacturers adopt the cold counter-impact straightening method, directly put the ring gear on the anvil, and use a straightening hammer to hit the two outer circular surfaces of A and B corresponding to the smallest dimension of the ring gear roundness, so that the surface is plastically extended The purpose of straightening is achieved, but in this method, due to the force of the inner frame of the ring gear hanging up and down and the tendency of plastic shrinkage when hammering, the straightening effect is greatly reduced, so the efficiency is low, the labor intensity is high, and the quality of the product obtained after processing is also poor. not ideal

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