An online punching device for high-strength steel roll forming arc position

Abstract

The present invention discloses an online punching device for high-strength steel roll forming arc position, which belongs to the technical field of punching dies. It includes an upper die assembly and a lower die assembly for downward punching, wherein the upper die assembly includes a punch for punching a square hole, wherein the punch includes a top surface, a bottom surface, and long-side punching surfaces corresponding to the long sides of the square hole symmetrically arranged on both sides of the punch, and short-side punching surfaces corresponding to the short sides of the square hole symmetrically arranged at both ends of the punch; the long-side punching surfaces on both sides of the punch form V-shaped surfaces after extension, and the intersection lines of the V-shaped surfaces are parallel to the long sides of the square hole; the short-side punching surfaces at both ends of the punch are perpendicular to the plate. A punch with an inclined surface on the long side is used to replace the original square punch, so that a square hole with an inclined long side can be punched out in advance. The inclined surface of the long side of the square hole is deformed by rolling. After the rolled part is formed, the deformation angle of the inclined surface of the long side of the square hole offsets the initial punching inclination, so that the long side of the square hole is perpendicular to the plane where the square hole is located.

Description

Technical Field

[0001] The invention relates to an online punching device for high-strength steel roll-forming circular arc positions, belonging to the technical field of punching dies. Background Art

[0002] With the development of the automobile industry, fuel economy, low carbon emissions and higher safety have put forward new requirements and challenges for the lightweighting of automobile bodies. Among automobile parts, roll-formed products are increasingly used. Roll-formed products have the characteristics of high material utilization and high forming efficiency.

[0003] Roll-formed products use an online punching and rolling process. The raw material is a metal sheet, which is gradually rolled and bent by a rolling device. There is a type of rolled part that needs to have a square hole opened at the curved arc, with the long side of the square hole parallel to the central axis of the arc. If the traditional process is used, a square hole is first punched on the metal sheet by an online punching device, and then the metal sheet is roll-formed by a rolling device. Since the long side of the square hole is initially perpendicular to the surface of the metal sheet, after rolling and bending, the long side of the square hole is not perpendicular to the plane where the square hole is located. This is because the arc is deformed after punching first and rolling later. If laser cutting is used after roll forming, the processing cost will increase significantly.

[0004] Therefore, an online punching device for high-strength steel roll-forming arc position is designed. A new type of punch with a bevel is designed to punch out a preset bevel in the metal sheet. After roll-forming, the curling deformation is just offset, so that the long side of the square hole is perpendicular to the plane where the square hole is located. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an online punching device for high-strength steel roll-formed arc positions, which solves the problem of deformation of square holes at the arc positions of roll-formed parts currently produced by punching first and then rolling.

[0006] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0007] A high-strength steel roll forming arc position online punching device, comprising an upper die assembly for punching downwards, and a lower die assembly matched with the upper die assembly, the upper die assembly comprising a punch for punching a square hole, the punch comprising a top surface for installation, a bottom surface for punching, and long-side punching surfaces symmetrically arranged on both sides of the punch corresponding to the long sides of the square hole, and short-side punching surfaces symmetrically arranged at both ends of the punch corresponding to the short sides of the square hole;

[0008] The long-side punching surfaces on both sides of the punch are extended to form V-shaped surfaces, and the intersection line of the V-shaped surfaces is parallel to the long side of the square hole;

[0009] The short-side punching surfaces at both ends of the punch are perpendicular to the plate.

[0010] As a preferred example, the short-side punching surface is an isosceles trapezoid that is wider at the top and narrower at the bottom.

[0011] As a preferred example, the lower die assembly includes a die hole seat for accommodating a punch.

[0012] The beneficial effects of the present invention are as follows: by adjusting the punch structure, a punch with an inclined surface on the long side is used to replace the original square punch, so that a square hole with an inclined long side can be punched out in advance, and the inclined surface of the long side of the square hole is deformed by rolling. After the rolled part is formed, the deformation angle of the inclined surface of the long side of the square hole offsets the initial punching inclination, so that the long side of the square hole and the plane where the square hole is located are perpendicular; it has a simple structure and is easy to be modified and used in the original production line. Only the punch needs to be replaced to overcome the problem of deformation of the square hole at the arc position, and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an online punching device for high-strength steel roll forming arc position;

[0014] Figure 2 It is a structural schematic diagram of an existing square punch punching;

[0015] Figure 3 It is a schematic diagram of the structure of the existing plate with square holes after roller pressing;

[0016] Figure 4 It is a structural schematic diagram of the punch of the present invention;

[0017] Figure 5 It is a schematic diagram of the structure of punching of the present invention;

[0018] Figure 6 It is a schematic diagram of the structure of the plate with long-side inclined square holes after roller pressing according to the present invention;

[0019] Figure 7 It is a schematic structural diagram of the square hole of the rolled part produced by the present invention.

[0020] In the figure: punch 1, top surface 101, bottom surface 102, long side punching surface 103, short side punching surface 104, square hole 2, long side 201, short side 202, plate 3, upper die assembly 4, lower die assembly 5, square punch 6. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations. Example

[0022] like Figure 1-Figure 7As shown, on the existing online punching device for high-strength steel roll forming, a punch 1 with a bevel on the long side 201 is used to replace the original square punch 6.

[0023] A high-strength steel roll forming arc position online punching device, comprising an upper die assembly 4 for punching downwards, and a lower die assembly 5 matched with the upper die assembly 4, the upper die assembly 4 comprising a punch 1 for punching a square hole 2, the new punch 1 comprising a top surface 101 for installation, a bottom surface 102 for punching, and long side punching surfaces 103 symmetrically arranged on both sides of the punch 1 corresponding to the long side 201 of the square hole 2, and short side punching surfaces 104 symmetrically arranged at both ends of the punch 1 corresponding to the short side 202 of the square hole 2;

[0024] The long-side punching surfaces 103 on both sides of the punch 1 are extended to form V-shaped surfaces, and the intersection line of the V-shaped surfaces is parallel to the long side of the square hole 2;

[0025] The short-side punching surfaces 104 at both ends of the punch 1 are perpendicular to the plate 3. The plate 3 is made of a metal plate or other materials that can be punched and rolled.

[0026] The short-side punching surface 104 is an isosceles trapezoid that is wider at the top and narrower at the bottom.

[0027] like Figure 2 , Figure 3 As shown, the existing square hole 2 punching and rolling process:

[0028] (1) Punching: Punching a square hole 2 on the plate 3 using a square punch 6, wherein the long side 201 and the short side 202 of the square hole 2 are perpendicular to the plane where the square hole 2 is located;

[0029] (2) Rolling: The square hole 2 of the plate 3 is rolled into an arc shape. The angle of the long side 201 of the square hole 2 changes, and the long side 201 of the square hole 2 is no longer perpendicular to the plane where the square hole 2 is located, resulting in assembly problems.

[0030] like Figure 4-Figure 7 As shown, the improved square hole 2 punching and rolling process:

[0031] (1) Punching: A square hole 2 is punched out on a plate 3 by a punch 1. The short side 202 of the square hole 2 is perpendicular to the plane where the square hole 2 is located. The long side 201 of the square hole 2 is tilted at a certain angle in advance. The tilt angle of the long side 201 is determined by the rolling bending condition of the plate 3.

[0032] (2) Rolling: The square hole 2 of the plate 3 is rolled into an arc shape, and the long side 201 of the square hole 2 is parallel to the central axis of the arc shape. After rolling, the long side 201 of the square hole 2 will have a certain angle change. The angle change caused by rolling is opposite to the pre-inclined angle and equal in size. After the two are offset, the long side 201 and the short side 202 of the square hole 2 are perpendicular to the plane where the square hole 2 is located.

[0033] It has the following advantages: by adjusting the structure of the punch 1, a square hole 2 with an inclined long side 201 can be punched out in advance, and the inclined surface of the long side 201 of the square hole 2 is deformed by rolling. After the rolled part is formed, the deformation angle of the inclined surface of the long side 201 of the square hole 2 offsets the initial punching inclination, so that the long side 201 of the square hole 2 is perpendicular to the plane where the square hole 2 is located; it has a simple structure and is easy to be modified and used in the original production line. Only by replacing the punch 1, the problem of deformation of the square hole 2 at the arc position can be overcome.

[0034] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An online punching process for high-strength steel roll forming arc position, using an online punching device, the online punching device includes an upper die assembly for downward punching, and a lower die assembly cooperating with the upper die assembly, the upper die assembly includes a punch for punching square holes, characterized in that: The punch includes a top surface for installation, a bottom surface for punching, and long-side punching surfaces symmetrically arranged on both sides of the punch corresponding to the long sides of the square hole, and short-side punching surfaces symmetrically arranged on both ends of the punch corresponding to the short sides of the square hole. The long-side punching surfaces on both sides of the punch form V-shaped surfaces after extension, and the intersection lines of the V-shaped surfaces are parallel to the long sides of the square hole. The short-side punching surfaces at both ends of the punch are perpendicular to the plate material, and the short-side punching surfaces are isosceles trapezoids that are wide at the top and narrow at the bottom; the method includes the following steps: pre-punching a square hole with an inclined long side, the inclined surface of the long side of the square hole is deformed by rolling, and after the rolled part is formed, the deformation angle of the inclined surface of the long side of the square hole offsets the initial punching inclination, so that the long side of the square hole is perpendicular to the plane where the square hole is located.

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