Partial hole-flanging forming method and device for large part

Abstract

The invention discloses a hole-flanging forming method and device for part of a large part. The method comprises the following steps: processing bottom hole to be subjected to flanging at the part of the large part, and manufacturing a female die and a male die corresponding to the bottom hole; inserting the male die into the bottom hole to be subjected to flanging from one side, so as to allow a die head of the male die to be tightly clamped into the bottom hole to be subjected to flanging; allowing a pull rod to penetrate a hole on the male die, so as to allow the head part of the pull rod to be clung to the bottom part of the male die; sleeving the female die from the tail part of the pull rod, so as to allow the die orifice of the female die to be clung to the other side of the bottom hole to be subjected to flanging; compressing the bottom part of the female die by a hydraulic gun seat, and clamping the tail part of the pull rod by a hydraulic clamp which is in axially moving fit with the hydraulic gun seat; and pulling the pull rod by the hydraulic clamp, so as to allow the male die to move towards the female die for die closing, and processing the bottom hole to be subjected to flanging into a formed flanged hole. The device mainly comprises the pull rod, the hydraulic gun, the female die and the male die. According to the invention, the advantages of simple structure, economical process and good round hole flanging effect are achieved. The device and the method can be directly applied to round hole flanging processing for part of the large workpiece, without limitation of field and part dimension; and moreover, the processing cost is reduced and the processing time is saved.

Description

technical field [0001] The invention relates to the technical field of round hole flanging forming, in particular to a method and a device for forming a partial round hole flanging of a large part. Background technique [0002] In product design, product parts are often designed with the feature of round hole flanging, and the traditional forming process of round hole flanging is to produce the mold first, and then use the mold stamping on the press to form. Due to the limitation of traditional forming technology and equipment, the parts processed by stamping and forming with press mold can only be small parts; for the processing of large parts with partial round hole flanging, there is no corresponding technology and equipment at present. Direct processing can only cut the parts to be processed from the whole of the large workpiece, and after the round hole flanging is processed, it is welded back to the original cutting position. This kind of processing method is very com...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect in the existing traditional molding process of round hole flanging that the size of the parts to be processed is limited by equipment, so that large workpieces can only be processed by partial cutting for round hole flanging, and to provide a local Round hole flanging forming method and device

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