A method for forming twisted stretch-bent profiles
A technology of twisting, bending, and profiles, which is applied in the field of sheet metal profile forming, can solve the problems of bulging and not relying on tires at the vertical ribs of profiles, and achieve the effect of improving the pass rate and avoiding defects.
Active Publication Date: 2018-01-16
HARBIN
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Problems solved by technology
[0006] Purpose of the present invention: the purpose of inventing this method is to solve the phenomenon that in the existing forming process, the vertical ribs of the profile are prone to bulging and not relying on the tire, and to propose a forming method for twisted and stretched profiles
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[0022] The specific embodiment: below in conjunction with accompanying drawing, the present invention is described in further detail:
[0023] Brief introduction to the specific forming process:
[0024] 1), blanking
[0025] Manual blanking with cutting saw
[0026] 2), degreasing
[0027] 3), profile expansion angle
[0028] Use a 350T hydraulic press to expand the angle.
[0029] Since the angle C in this kind of part is a variable angle, to ensure that the angle C of the part after forming is consistent with the angle specified in the drawing, it is necessary to use the angle expansion die to expand the angle before performing the stretch bending process. However, such parts are relatively long, and the size of the hydraulic press table requires that the length of the expansion die must be within 800mm. Two new technologies are involved in the design of the expansion die: the flattening of profile parts and the joint use of multiple expansion dies. When the profile pa...
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The invention discloses a forming method for a twisted bent profile. For forming of existing bent profiles, a stretch bending method is generally adopted, but some parts are variable angle bent profiles, if the variable angle bent profiles are subjected to stretch bending directly, the phenomena of bulge and failed attaching between the profiles and a mold occur very easily at vertical ribs of the profiles subjected to stretch bending, the forming difficulty of the parts is large due to the purposes and the shapes of the parts, and machining and forming of the parts cannot be met through a traditional process scheme. In order to better solve the problems and meet the assembly requirements, a process method that angle expansion and stretch bending are combined is adopted. According to the forming method for the twisted bent profile, angle expansion and stretch bending are flexibly combined, so that the defects produced by pure stretch bending are successfully overcome, and the part qualified rate is greatly increased. Practices prove that the machining scheme is very applicable.
Description
technical field [0001] The invention belongs to the technical field of forming sheet metal profiles, and relates to a forming method for twisted stretch-bent profiles. Background technique [0002] like figure 1 As shown, it is the standard section of most T profiles, where the angle between the profile vertical rib and the bottom plane is C=90°, and many common part drawings require that C be equal to a certain fixed angle (greater or less than 90°), after the part is formed like figure 2 As shown, there is already a fixed forming plan for this kind of parts workshop, and the specific forming steps are: blanking, annealing, profile stretch bending, quenching, stretch bending correction, manual shape correction, and submission for inspection. [0003] The above-mentioned forming scheme is general, simple, and the workers are skilled in operation, but there are deficiencies in this forming scheme, and the formed parts have the following disadvantages: [0004] 1) After st...
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IPC IPC(8): B21D31/00
Inventor 刘电生周宝王鹤王久杨孟凡余
Owner HARBIN