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Process for removing torsion springback in formation of longitudinal beam by using local deformation

A local deformation and longitudinal beam technology, applied in the direction of forming tools, manufacturing tools, metal processing equipment, etc., can solve problems that plague stamping technicians, product distortion and springback cannot be controlled, and cannot meet the technical requirements of product drawings, etc., to achieve stable assembly quality effect

Active Publication Date: 2013-06-05
JIANGLING MOTORS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional longitudinal beam process is generally completed by one forming process. The twist and springback of the final product cannot be controlled, and there are congenital process deficiencies. The factory often makes concessions in production and cannot meet the technical requirements of product drawings. This has long plagued all stamping technicians.

Method used

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  • Process for removing torsion springback in formation of longitudinal beam by using local deformation
  • Process for removing torsion springback in formation of longitudinal beam by using local deformation
  • Process for removing torsion springback in formation of longitudinal beam by using local deformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment one: see figure 1 , figure 2 , image 3 .

[0035] A process for solving the springback of longitudinal beam forming by local deformation, characterized in that it includes the following steps:

[0036] 1) Station setting process

[0037] Two stations are set on the longitudinal beam forming mold 7, namely the preforming process station and the forming process station;

[0038] 2) Preforming process

[0039] At least two convex hulls, one big at one end and small at the other end, are processed at the preforming process station on the longitudinal beam forming mold 7, the large end of the convex hull is located inside the side wall of the longitudinal beam forming mold 7, and the small end of the convex hull is a smooth end And towards the axial direction of the inner cavity of the longitudinal beam forming mold 7, the small head of the convex hull protrudes from the side wall of the mold by 0-5mm;

[0040] The processing of the convex hull can be reve...

Embodiment 2

[0083] Embodiment 2: This embodiment is similar to Embodiment 1, and its similarities will not be described in detail. The only difference is that the longest distances of the convex-hull big end and small end selected in this embodiment are respectively

[0084] The first convex hull: 15.5mm;

[0085] The second convex hull: 21.5mm;

[0086] The third convex hull: 16.5mm;

[0087] The fourth convex hull: 14.5mm;

[0088] The fifth convex hull: 17.5mm;

[0089] The sixth convex hull: 18.5mm.

[0090] The small head of the convex hull protrudes 5mm from the side wall of the mold;

[0091] After selecting this group of convex hulls, put the longitudinal beam blank into the longitudinal beam forming mold and then press and form it to obtain the dimensions of the longitudinal beams at the six convex hulls as follows:

[0092] The first convex hull 1: the thinning rate is reduced to 12%, there is no crack, the distortion of the bottom surface becomes smaller, and the differenc...

Embodiment 3

[0099] Embodiment 3: This embodiment is similar to Embodiment 1, and its similarities will not be described in detail. The only difference is that the longest distances between the large end and the small end of the convex hull selected in this embodiment are respectively

[0100] The first convex hull: 14.5mm;

[0101] The second convex hull: 20.5mm;

[0102] The third convex hull: 15.5mm;

[0103] The fourth convex hull: 13.5mm;

[0104] The fifth convex hull: 16.5mm;

[0105] The sixth convex hull: 17.5mm.

[0106] The small head of the convex hull protrudes 0.2mm from the side wall of the mold;

[0107] After selecting this group of convex hulls, put the longitudinal beam blank into the longitudinal beam forming mold and then press and form it to obtain the dimensions of the longitudinal beams at the six convex hulls as follows:

[0108] The first convex hull 1: the thinning rate is reduced to 12%, there is no crack, the distortion of the bottom surface becomes smalle...

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Abstract

The invention relates to a process for removing torsion springback in formation of a longitudinal beam by using local deformation. In the invention, the conventional one-step punch forming process is divided into a station setting step, a performing step and a forming step, two stations, namely a pre-forming step position and a forming step position, are formed in a longitudinal beam forming moldin the station setting step, at least two bosses with a big end and a small end are machined on the longitudinal beam forming mold at the pre-forming step station, and a longitudinal beam blank to bemachined is placed in the longitudinal beam forming mold to be formed by punching. The specifications of the longitudinal beam, which is manufactured by the process provided by the invention, of a vehicle frame can meet technical requirements, and the bottom shape of the finished longitudinal beam requires the difference of the highest point and the lowest point to be less than or equal to 2 millimeters; therefore, the control over the overall specifications of the vehicle frame is ensured, and the assembly quality of the whole vehicle is stabilized.

Description

technical field [0001] The invention relates to the field of cold stamping dies and techniques, in particular to a technique for solving the distortion and springback of longitudinal beams by using local deformation. Background technique [0002] The longitudinal beam is the key component of the frame and the backbone of the frame. The manufacturing quality of the frame depends on the manufacturing level of the longitudinal beam. If the size of the longitudinal beam cannot be guaranteed, the control of the overall size of the frame will be difficult to stabilize. The frame is the carrier of the body, engine, and front and rear suspension parts, which has a great relationship with the assembly quality of the vehicle. The shape of the bottom surface of the finished stringer requires that the difference between the highest point and the lowest point is not more than 2mm. The traditional longitudinal beam process is generally completed in one forming process. The twist and spr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D53/00B21D37/10
Inventor 骆小红彭斌李小冬付筱筠黄奇华叶海林
Owner JIANGLING MOTORS
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