Processing method of high-strength light-weight roll-shaped section and application thereof

Abstract

The present invention provides a high-strength lightweight roll-formed profile, which is a closed cavity body with three closed cavities formed by welding and combining an enclosing member and an embedding member; the enclosing member is a rectangular cavity with an opening on one side formed by symmetrically bending a second plate; the embedding member is a "C" - shaped bending member formed by symmetrically bending a first plate. The present invention has three closed cavities, which can effectively improve the strength, rigidity and bending resistance of the material, and can also quickly transfer and buffer forces when being impacted. When used as an automobile anti-collision beam or a side beam of a battery case, it can ensure the safety of the automobile. The present invention also provides a processing method and application of the profile. By gradually forming and parallel processing in an inside-out manner, the number of forming groups is small, the equipment investment is small, and the floor space is small; the forming process is simple, there is no forming blind angle, and each bending angle can be controlled; the forming accuracy of the product parts is high, the cumulative error is small, and the application is wide.

Claims

1. A method for processing high-strength, lightweight roll-formed profiles, characterized in that: The roll-formed profile is a closed cavity body with three parallel closed cavities (9) formed by welding together an enclosure (1) and an insert (2). During processing, the processing sequence is from the inside out. First, the inner insert is formed. After forming, the two open ends of the insert are welded to the corresponding positions of the enclosure plate. Then, the outer enclosure is formed. Finally, the two open ends of the enclosure are welded to the insert to form a closed roll-formed profile.

2. The processing method of the high-strength lightweight roll-formed profile according to claim 1, characterized in that... Includes the following steps: S1. The first sheet material used for molding the insert and the second sheet material used for molding the enclosure are uncoiled and leveled respectively. S2. The first plate after leveling is fed into the first cold bending forming unit, and the insert is formed by multiple forming rollers. The second plate does not participate in the forming at this stage. The open end of the insert is welded to the second plate after leveling to form a whole. S3. The insert and the second plate are fed into the second cold bending forming unit, and the enclosure is formed by multiple forming rollers. The insert does not participate in the forming at this stage. The open end of the enclosure is welded to the end of the support arm to form a closed roll profile. S4. Cut and blank the roll-formed profile to the required length to obtain a high-strength, lightweight roll-formed profile.

3. The processing method of the high-strength lightweight roll-formed profile according to claim 2, characterized in that: In step S2, when the first plate is formed, the two sides of the hook edge are symmetrically bent first, and the bent welding ends of the two ends of the embedded part are formed. Then, the two sides of the top corner are symmetrically bent and the middle part is reversed to form the support arm and the second front wall. Finally, the springback control and finishing are carried out. In step S3, when the second plate is formed, the bent welding ends on both sides of the opening end of the enclosure are first bent symmetrically, then the top corners on both sides, the left side wall and the right side wall of the enclosure are bent symmetrically inward, and finally the bottom corners on both sides and the rear side wall of the enclosure are bent symmetrically.

4. The processing method of the high-strength lightweight roll-formed profile according to claim 3, characterized in that: In step S2, the open end of the insert is welded to the second plate by arc welding, fusion welding, or pressure welding; in step S3, the open end of the enclosure is welded to the insert by arc welding or fusion welding.

5. The processing method of the high-strength lightweight roll-formed profile according to claim 1, characterized in that: The enclosing member (1) is a rectangular cavity formed by symmetrically bending a second plate and having an opening on one side, including a front side wall (1-1) and a rear side wall (1-2) arranged oppositely, and a left side wall (1-3) and a right side wall (1-4) arranged oppositely. An opening is provided in the middle of the front side wall (1-1); the embedding member (2) is a "ji" - shaped bending member formed by symmetrically bending a first plate, including two support arms (2-1) arranged oppositely, and a second front wall (2-2) connecting the two support arms (2-1) and perpendicular to the two support arms (2-1). The second front wall (2-2) is adapted to the middle opening of the front side wall (1-1) of the enclosing member (1). The two support arms (2-1) extend into the interior of the enclosing member (1) and are welded to the rear side wall (1-2) of the enclosing member (1). The two open ends of the enclosing member (1) are welded to the ends of the support arms (2-1) near the second front wall (2-2); the left side wall (1-3) and the right side wall (1-4) have the same width, and the support arms (2-1) are arranged parallel to the left side wall (1-3) and the right side wall (1-4).

6. The application of the high-strength lightweight roll forming profile processing method according to any one of claims 1 to 5, characterized in that: The processing method can be used to process multi - cavity profiles formed by separately shaping two or more plates and then enclosing them from the inside outwards.

7. The application of the high-strength lightweight roll forming method according to claim 6, characterized in that: The multi - cavity profiles include "mu" - shaped cross - section profiles, "tian" - shaped cross - section profiles, or "ri" - shaped cross - section profiles.

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