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CN-122007266-A - Straightening guide structure capable of adapting to wall thickness change of profile

CN122007266ACN 122007266 ACN122007266 ACN 122007266ACN-122007266-A

Abstract

The invention relates to the technical field of differential thick plate processing, in particular to a straightening guide structure for self-adapting wall thickness change of a section bar, which is arranged at an inlet of straightening equipment and used for guiding blanks for forming the section bar with the variable wall thickness. According to the invention, the blanks are subjected to multi-point distribution constraint through the plurality of guide units which are arranged at intervals along the travelling direction, each unit independently responds to the alternating thickness change of the blanks along the length direction, so that the blanks keep a centering posture in the whole travel, and the synchronous mechanism forces the guide pieces at two sides to move in an equidistant and reversely mirrored mode, so that the center line of the blanks is overlapped with the center line of the inlet of the straightening equipment, and the deviation and torsion are reduced.

Inventors

  • SUN JUNTONG
  • ZHANG GUANGJI
  • LIU HONGJIE

Assignees

  • 苏州东宝海星金属材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260310

Claims (10)

  1. 1. A straightening and guiding structure for adapting to wall thickness changes of a section bar, which is arranged at an inlet of a straightening device (1) and is used for guiding blanks for forming the section bar with the wall thickness changes, and is characterized by comprising: A carrier plate (2), and a plurality of guide units arranged on the carrier plate (2) at intervals along a traveling direction of a blank, the guide units comprising: the guide pieces (5) are oppositely arranged at two sides of the blank travelling path, and a limit space which is adaptive to the width of the blank is formed between the guide pieces (5); An elastic return element (7) connected between the guide elements (5) to provide a pre-tightening force for the opposite movement of the guide elements (5); The synchronous mechanism acts on the guide pieces (5) to enable the guide pieces (5) to generate equidistant reverse mirror image synchronous motion, the center line of the blank is overlapped with the center line of an inlet of the straightening equipment (1), a plurality of guide units are distributed in a multipoint mode along the advancing direction of the blank and do not interfere with each other, and the spacing of the limiting space floats in a preset range along with the cooperative action of the elastic reset piece (7) and the blank.
  2. 2. Straightening and guiding structure for adapting to wall thickness variations of profiles according to claim 1, characterized in that each guiding element (5) is fixedly connected with a slide block (3), that the slide blocks (3) are mounted transversely slidably in slide grooves (4) provided in the carrier plate (2), that the synchronizing mechanism comprises a connecting rod assembly, that the connecting rod assembly connects two slide blocks (3).
  3. 3. The straightening and guiding structure for adapting to wall thickness variation of sectional material according to claim 2, characterized in that the connecting rod assembly comprises a pair of rocking bars (8) and a movable piece (11), one end of each rocking bar (8) is rotationally connected with a corresponding sliding block (3), the other ends of two rocking bars (8) are hinged with the same movable piece (11), the movable piece (11) is installed on the bearing plate (2) in a lifting manner, and the lifting direction of the movable piece is perpendicular to the transverse sliding direction of the sliding block (3).
  4. 4. A straightening and guiding structure for adapting to wall thickness changes of sectional materials according to claim 3, characterized in that a guiding rod (13) is fixedly arranged on the movable piece (11), a guiding plate (15) is fixedly arranged on the bearing plate (2), and the guiding rod (13) is in sliding fit with a guiding hole (16) on the guiding plate (15).
  5. 5. The straightening guide structure for self-adapting section wall thickness change according to claim 2, characterized in that the elastic reset piece (7) is a compression spring, the sliding block (3) is provided with a spring positioning rod (6), and the end part of the compression spring is sleeved on the spring positioning rod (6).
  6. 6. A straightening and guiding structure for adapting to wall thickness variations of profiles according to claim 3, characterized in that the structure further comprises a pressing assembly, which is coupled to the movable member (11), which is lifted and lowered with the lifting and lowering of the movable member (11), for pressing a wide blank from above.
  7. 7. The straightening guide structure for adapting to the wall thickness variation of a profile according to claim 6, characterized in that said pressing assembly comprises: A roller frame (17) fixedly connected with the movable piece (11); and the two ends of the compaction roller (18) are rotatably connected with the roller frame (17) and are positioned above the variable-width blank.
  8. 8. The straightening guide structure which adapts to the wall thickness variation of the profile according to claim 4, characterized in that it also comprises a blowing assembly which, in conjunction with the movable element (11), acts with the lifting of the movable element (11) for blowing air towards the contact area of the guide element (5) with the blank of widening width.
  9. 9. The straightening guide structure for adapting to the wall thickness variation of a profile according to claim 8, characterized in that said purge assembly comprises: A bellows type air pump (24) with an air inlet (25) and an air outlet (26), one end of the bellows type air pump is connected with the movable piece (11), the other end of the bellows type air pump is connected with the guide plate (15), and the bellows type air pump (24) synchronously stretches or compresses along with the lifting of the movable piece (11) so as to realize unidirectional air suction or unidirectional air injection; And one end of the air blowing pipe (27) is connected with the air outlet (26) of the bellows type air pump (24), and the other end of the air blowing pipe extends to the vicinity of the contact area between the guide piece (5) and the widened blank and is communicated with an air blowing nozzle (28).
  10. 10. Straightening and guiding structure for adapting to wall thickness variations of profiles according to claim 1, characterized in that the side of the guiding element (5) in contact with the wide-width blank is provided with a number of freely rotatable rollers and/or that the side of the guiding element (5) in contact with the wide-width blank is provided with a transition bevel (22).

Description

Straightening guide structure capable of adapting to wall thickness change of profile Technical Field The invention relates to the technical field of differential thick plate processing, in particular to a straightening guide structure capable of adapting to wall thickness change of a section bar. Background Along with the increase of the light-weight demand in the automotive field, the wall thickness variable profile is widely applied because of being capable of realizing the bearing according to the requirement. Such materials are typically manufactured by a "constant thickness coil-variable thickness roll-forming" process, wherein the rolled stock exhibits periodic variations in thickness along the length, with alternating thick and thin regions. The thickness difference causes the change of the section moment of inertia, the rigidity of the thick area is high, the extrusion force to the guide piece is high, the rigidity of the thin area is small, the shaking is easy to occur, and simultaneously, the edge of the blank may have tiny undulation caused by the rolling process. Such blanks must be straightened to ensure flatness before entering the forming process. At present, fixed guide plates or single-group adjustable guide structures are mostly adopted for straightening and guiding variable-thickness blanks. The fixed guide plate can not adapt to edge fluctuation, is easy to cause blocking or deviation, and the single-group adjustable guide structure can only provide single-point constraint, is difficult to consider the large extrusion force of a thick region and the flexible support requirement of a thin region, and is easy to cause the shaking instability of the thick region crush injury guide piece and the thin region, thereby influencing the straightening precision and the forming quality. Therefore, it is necessary to provide a straightening guide structure capable of adaptively changing the thickness of a blank with a variable thickness alternately, realizing full-stroke stable centering guide, and avoiding surface damage. Disclosure of Invention In view of the above, the present invention aims to provide a straightening and guiding structure for adapting to wall thickness variation of a profile, so as to solve the above technical problems. Based on the above object, the present invention provides a straightening guide structure for adapting to wall thickness variation of a profile, which is installed at an inlet of a straightening device and is used for guiding a blank for forming the profile with variable wall thickness, and the straightening guide structure comprises: the blank guide device comprises a bearing plate and a plurality of guide units which are arranged on the bearing plate at intervals along the travelling direction of the blank, wherein the guide units comprise: The guide pieces are oppositely arranged at two sides of the blank travelling path, and a limit space which is adaptive to the width of the blank is formed between the guide pieces; the elastic resetting piece is connected between the guide pieces to provide a pretightening force for enabling the guide pieces to move in opposite directions; The synchronous mechanism acts on the guide pieces so as to enable the guide pieces to generate equidistant reverse mirror image synchronous motion, the center line of the blank is overlapped with the center line of the inlet of the straightening equipment, a plurality of guide units are distributed in a multipoint mode along the advancing direction of the blank and do not interfere with each other, and the spacing of the limiting space floats in a preset range along with the cooperation of the elastic reset piece and the blank. As a preferable technical scheme of the invention, each guide piece is fixedly connected with a sliding block, the sliding blocks can be transversely and slidably arranged in sliding grooves formed in the bearing plate, and the synchronous mechanism comprises a connecting rod assembly, and the connecting rod assembly is connected with the two sliding blocks. As the preferable technical scheme of the invention, the connecting rod assembly comprises a pair of rockers and a movable piece, one end of each rocker is rotationally connected with the corresponding sliding block, the other ends of the two rockers are hinged with the same movable piece, and the movable piece is arranged on the bearing plate in a lifting manner, and the lifting direction of the movable piece is perpendicular to the transverse sliding direction of the sliding block. As a preferable technical scheme of the invention, the movable piece is fixedly provided with a guide rod, the bearing plate is fixedly provided with a guide plate, and the guide rod is in sliding fit with a guide hole on the guide plate. As a preferable technical scheme of the invention, the elastic reset piece is a compression spring, the sliding block is provided with a spring positioning rod, and the end part of the compressi