A free forging method for cylindrical forgings with stepped inner holes
A forging method and forging technology, applied in metal processing equipment, other household appliances, household appliances, etc., can solve the problems of affecting the service life of parts, large processing hours, cutting of forgings streamline, etc., so as to increase the service life and reduce the Forging weight, ensure the effect of internal streamline
Active Publication Date: 2021-03-05
MCC SFRE HEAVY IND EQUIP
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Problems solved by technology
[0004] The purpose of the present invention is to provide a free forging method for cylindrical forgings with stepped inner holes, which solves the problem that in the prior art, the stepped inner holes are generally designed as straight holes in the free forging process, and many additional forging pieces are required, resulting in forgings. The weight of the forging is increased; and due to the limitation of the shape of the forging, the amount of follow-up processing is relatively large, and it is easy to cut off the streamline of the forging during processing, which affects the service life of the part
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[0037] The free forging method of the step inner hole cylindrical forging of the present invention, concrete steps are:
[0038] Preparation steps: Formulate the forging process according to the forgings with different specifications of the stepped inner hole cylinder, select the mandrel 1 3 and mandrel 2 4 of the corresponding size according to the size of the forging drawing, and make the applicable conical support 5 and the angle of the conical surface of the conical support 5 Control it at 30°-45°, and at the same time ensure that the actual support part (the contact part with the forging 1) is in the middle of the tapered support cone surface during the hole closing process, and the upper and lower deviations are within 20mm. 4 and the tapered support 5 are firmly fixed to form a combined mandrel 6;
[0039] The first fire: chamfering, chopping and blanking the steel ingot of the raw material, upsetting, rounding and smoothing, punching, and making the blank 2 according t...
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The invention discloses a free forging method for a cylindrical forging with a stepped inner hole. The steps include: first firing: making a blank in the shape of a cylindrical ring; second firing: elongating the blank to obtain a prototype forging. There is a protruding part on the circle; the third fire: finish the forging, put the protruding part of the billet obtained in the second fire on the V-shaped anvil, control the reciprocating and downward movement of the flat anvil, and cooperate with the combined core The rotating movement of the rod closes the protruding part of the secondary blank to the size requirement of the forging, completes the forming through the initial stage and the finishing stage, and obtains a forging with a stepped inner hole. The method of the invention has simple tooling, convenient operation and cost saving.
Description
technical field [0001] The invention belongs to the technical field of free forging, and relates to a free forging method for a cylindrical forging with a stepped inner hole. Background technique [0002] In the free forging production, there are many cylindrical forgings, such as various pressure vessels, cylinders, etc. Among them, the stepped inner hole cylindrical forgings are difficult to forge in the actual forging process, so they are generally designed in the free forging process. Straight holes require more additional forging blocks, resulting in an increase in the weight of the forging; and due to the limitation of the shape of the forging, the subsequent processing time is relatively large, and the streamline of the forging is cut off during processing, which has a certain impact on the service life of the part. [0003] Therefore, there is an urgent need to develop a new forging method, so that the stepped inner hole can be forged out of the stepped part of the i...
Claims
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IPC IPC(8): B21J5/00B21J5/06B21K21/06
CPCB21J5/002B21J5/06B21K21/06
Inventor 郭长虹田新奇滕军航薛永庆
Owner MCC SFRE HEAVY IND EQUIP