Precision forging and plastic molding process for inner toothed ring of winch

Abstract

The invention discloses a precision forging and plastic molding process for an inner toothed ring of a winch. The process comprises the following steps: (1) hot forging and plastic molding: heating a solid cylindrical metal blank material to a forging temperature, and die-forging to form an assembling end and a preserved extrusion inner toothed blank material, wherein the two end surfaces of the assembling end and the preserved extrusion inner toothed blank material are sunken inward, share the same bottom and form blind hole structures respectively; (2) machining to remove the bottom to form a through hole structure, wherein the part corresponding to the bottom is called the combination part of the assembling end and the preserved extrusion inner toothed blank material; (3) cold forging and plastic molding: in a cold forging molding female die, die-forging the inner wall of the preserved extrusion inner toothed blank material or the inner wall of the combination part of the assembling end and the preserved extrusion inner toothed blank material by utilizing a tooth-shaped die to form the tooth form of an inner tooth. The process is high in production efficiency and low in production cost; the produced product has high tooth-shaped surface strength and high precision; particularly, the extruded product quality is stable; the comprehensive mechanical property is high; the requirement on the use of the winch of crane equipment can be met; the process is accordance with the development trend of the manufacturing industry of the present world.

Description

technical field [0001] The invention belongs to the technical field of forging and forming of metal parts, and relates to a production process of an inner gear ring, in particular to a manufacturing process of warm-cooling combined forging forming for the inner gear ring of a hoisting equipment winch. Background technique [0002] The inner gear ring of the hoisting equipment winch is an important part that transmits variable loads and large torques. It requires high manufacturing precision and tooth surface strength. The manufacturing process is complicated and difficult to process, especially the tooth shape, tooth pitch, The precision of the gear is difficult to control. The general processing method of this kind of gear ring is: cutting material→heating→hot forging→rolling ring→machined finished product. For example, a capstan internal gear ring includes an assembly end 1 and an internal gear ring 2, and a joint 4 is also provided between the assembly end 1 and the inter...

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Problems solved by technology

[0003] The invention aims at the deficiencies of the existing milling process and gear shaping process to form the inner tooth process to manufacture the inner gear ring of the hoisting equipment winch, and mainly solves the existing traditional processing technology, which requires more investment in machine tools, wastes metal materials in cutting processing, and reduces manufacturing accuracy. To solve the technical problems of low tooth surface strength, long production cycle, and high processing cost, we provide a composite plastic molding technology using warm and cold precision forging, which has high manufacturing accuracy and tooth surface strength, high production efficiency, and low production cost, especially after extrusion The product quality is stable, the comprehensive mechanical performance is high, and the precision forging and plastic forming process of the inner gear ring of the winch can meet the requirements of the use of the winch of the lifting equipment.

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