A method for producing hexagonal forgings using a fast forging machine
A hexagonal and forging technology, which is applied in the field of producing hexagonal forgings with fast forging machines, can solve problems such as cracks on the surface of blanks, scrapping of forgings, failure of forging temperature to ensure normal production, etc., and achieve the effect of reducing production costs
Inactive Publication Date: 2018-01-23
BAOSTEEL SPECIAL STEEL CO LTD
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Problems solved by technology
Due to the difference in tonnage, the operation method is also different. Using the previous forging operation method to produce forgings of more than 20 tons, the temperature of the forgings cannot be guaranteed for normal production. scrapped
At the same time, the operation pass is completely different, the original operation pass does not fully meet the internal and surface quality of the billet
Method used
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Embodiment 1
[0039] Forging operation method of the present invention,
[0040] Forging material preparation: one 35t hot ingot, see the physical specification figure 1 . Steel type: 40Cr.
[0041] Preparation of production tools: 600mm upper and lower flat anvils, φ2000mm upper and lower upsetting discs, 35t grasping tongs, 35t upsetting tongs, 35t chains, φ500~φ560mm drop sleeves.
[0042] Production fire times and deformation process.
[0043] The first fire: Press the pliers (5 minutes).
[0044] Use 600mm upper and lower flat anvils to press out the tongs along the steel ingot cap mouth line, the specification of the tongs is φ550*600mm. After forging, see figure 2 shown.
[0045] The second fire: Upsetting for the first time (taking 10 minutes).
[0046] Remove the 600mm upper anvil, replace it with φ2000mm upper and lower upsetting discs, and upset the steel ingot to 1 / 2 of the original height. See image 3 shown
[0047] The third fire: Pull out and take 10 minutes.
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Abstract
The invention discloses a method for producing hexagonal forge pieces through a rapid forging press. The method is characterized by comprising the specific steps that forge piece materials comprising a 35 t heat ingot with the physical specifications shown in the graph 1 and 40 Cr steel are prepared, production tools comprising 600 mm upper and lower flat anvils, phi 2000 mm upper and lower upsetting discs, 35 t gripping tongs, 35 t upsetting tongs, a 35 t chain and a phi 500-560 mm throwing sleeve are prepared; and the production heating number and a deformation process are carried out as follows, wherein in the first heating number, tongs handle pressing is carried out for 4-6 min, the 600 mm upper and lower flat anvils are adopted for pressing out a tongs handle along an ingot head opening line, and the forged appearance is shown in the graph 2. According to the method, 20 t or more of forge pieces are produced, new breakthrough of piece forging operation is completed, a new large-tonnage forge piece operation method is completed, the effects of octagonal cogging, accurate base faces, hexagonal shaping and uniform deformation are achieved, the forge pieces with the one-piece weight of 20 t or more are produced for the first time, the requirements for surface quality and interior quality can be met, and further more the variety of the forge pieces is improved by one level. The production cost is reduced.
Description
technical field [0001] The invention relates to the operation method of "octagonal billet opening, accurate base surface, hexagonal shaping, and uniform deformation" in the metallurgical industry, especially for large forgings with a single weight of 23 tons. Background technique [0002] Forgings with a single piece weighing more than 20 tons are not produced in this industry at present. Generally, the production of such forgings is less than 10 tons. Due to the difference in tonnage, the operation method is also different. Using the previous forging operation method to produce forgings of more than 20 tons, the temperature of the forgings cannot be guaranteed for normal production. scrapped. At the same time, the operation passes are completely different, and the original operation passes cannot fully meet the internal and surface quality of the billet. Contents of the invention [0003] The purpose of the present invention is to use the operation method of "octagonal...
Claims
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IPC IPC(8): B21J5/00B21J5/06B21J5/08
Inventor 杨磊张志栋钱杰张海游邱达伟
Owner BAOSTEEL SPECIAL STEEL CO LTD