A low-cost free forging method for large vertical roll forgings

A low-cost, vertical roll technology, applied in the forging field of roll forgings, can solve the problems of not less than 1/3 of the diameter, the increase of the weight of the steel ingot, and the increase of production costs, so as to avoid process surplus, benefit the surface quality, and ensure forging quality effect

CN107008837BActive Publication Date: 2019-02-22ANSTEEL HEAVY MACHINERY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-02-22

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Abstract

The invention relates to a low-cost free forging method for a large vertical roll forging. The low-cost free forging method comprises the steps that (1) a forging tool is preheated; (2) a steel ingot for the vertical roll forging is manufactured; (3) the first time of heating is conducted, and the steel ingot is subjected to tong holding, pre-drawing and ingot tail filing; (4) the second time of heating is conducted, and the steel ingot is subjected to upsetting; (5) the third time of heating is conducted, and the steel ingot is drawn to be prepared into a forging blank; (6) the fourth time of heating is conducted, the two ends of the forging blank are put into a leaking disc, and the middle of the forging blank is subjected to upsetting; and (7) the fifth time of heating is conducted, and the forging blank subjected to upsetting is drawn into the finished forging. According to the low-cost free forging method, by improving a forging process, residual process blocks are avoided from being additionally generated during forging, and therefore the weight of the steel ingot is lowered, and production cost is greatly reduced.
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Description

technical field

[0001] The invention relates to the technical field of forging processing, in particular to a forging method of a roll forging. Background technique

[0002] my country is the largest steel country in the world, and its steel output ranks first in the world. Therefore, there is a huge demand for various types of rolls used in rolling steel.

[0003] When using free forging to manufacture various types of roll forgings, there is a large vertical roll forging (such as figure 1 As shown) the structural feature is that the length of the middle roll body is small but the diameter is large, and the diameter of the roll necks at both ends is very different from the roll body and the length is small. Rough-drawing-upsetting-drawing and splitting-drawing to finished product. Due to the free forging process, the length of the end should not be less than 1 / 3 of the diameter when the end is pulled out, otherwise serious end shrinkage will occur, resulting in the scrapp...

Examples

Embodiment Construction

[0019] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0020] Such as figure 2 Shown, the low-cost free forging method of a kind of large-scale vertical roll forging described in the present invention comprises the following steps:

[0021] 1) Preheating the forging tool;

[0022] 2) making steel ingot 1 for vertical roll forging;

[0023] 3) For the first fire, press the jaws, pre-draw the length, and stagger the ingot tail; steel ingot 1 presses the jaws at the riser, and after pre-drawing the long steel ingot 1, gas cut the ingot tail and chamfer;

[0024] 4) The second fire, upsetting;

[0025] 5) The third fire, drawing and lengthening to make forging billet 2;

[0026] 6) For the fourth firing, put the two ends of the forging billet 2 into the leakage plate 3, and upset the middle;

[0027] 7) In the fifth fire, the upsetting forging billet 2 is elongated to the finished forging 4 .

[00...