Forging forming technology of straight-shank double hooks

Abstract

The invention discloses a forging forming technology of straight-shank double hooks and belongs to the technical field of forging and pressing formation. The forging forming technology of the straight-shank double hooks comprises the following steps that firstly, round steel with the diameter being D and the length being L is selected; secondly, the diameter becomes D1 through heading; thirdly, the part with the length being L1 is measured out from the lower end of the forged piece to be used as a hook body, and the part above the part, from the position of the L1, of the forged piece is usedas a hook shank, forging and drawing are conducted on the hook shank, the drawn section is divided into two sections with different diameters from top to bottom, the diameter of the upper section is D2, and the diameter of the lower section is D3; fourthly, the hook body at the lower end of the forged piece is forged to be a cylinder perpendicular to the upper end of the forged piece, and the diameter of the cylinder is D3; fifthly, the two ends of the cylinder at the lower end of the forged piece are drawn, and the two ends of the cylinder become cones; sixthly, the hook shank at the upper end of the forged piece is drawn to be round steel in a preset diameter; and seventhly, the two ends of the hook body are bent, and a double-hook blank is manufactured. By the adoption of the forging forming technology of the straight-shank double hooks, the utilization rate of raw materials is greatly improved, the flaw detection yield of workpieces is greatly improved, at least two working procedures of an original machining manner are omitted, the energy consumption is reduced, and efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of forging and forming, in particular to a forging and forming process of straight shank double hooks. Background technique [0002] As a component with high safety requirements for hoisting machinery, the hook is indispensable. It is mainly forged from alloy steel. Traditionally, it is forged into two parts, the hook shank and the rectangular billet. In the process of processing the hook shape, the probability of cracks on the surface of the hook head is relatively high. Some processing methods are easy to damage part of the internal structure of the hook and affect the overall quality of the hook. [0003] The original traditional craft is to use a forging hammer to make a blank, which is shaped like Figure 9 As shown, its disadvantages are: 1. This not only increases the weight of blank blanks, but also requires a corresponding increase in the power of forging equipment, and also causes waste of raw mat...

AI Technical Summary

Problems solved by technology

In the process of processing the hook shape, the probability of cracks on the surface of the hook head is relatively high. Some processing methods are easy to damage part of the internal structure of the hook and affect the overall quality of the hook.

[0003] The original traditional craft is to use a forging hammer to make a blank, which is shaped like Figure 9 As shown, its disadvantages are: 1. This not only increases the weight of blank blanks, but also requires a corresponding increase in the power of forging equipment, and also causes waste of raw materials;

[0004] 2. The traditional double hook forming method is cutting or direct CNC machining and milling. The former is easy to cause cutting defects, and it is also easy to change the original structure of the steel. Preheating before cutting and heat preservation and tempering after cutting are not acceptable. ignore

The latter directly uses the machining center to mill the contour first, and then process the shape. The construction period is longer, the man-hours are more, and the processing cost is too high. Generally, it is not used.

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