Stamping die for negative angle bending

Abstract

The utility model discloses a stamping die for negative angle bending. The stamping die comprises an upper die base, an upper ejector rod, a lower die base, a lower ejector rod, a forming block, an avoiding through groove, a negative angle forming convex part, a negative angle forming limiting surface, a sliding guide inclined block, a limiting block, a bending forming punch, a negative angle forming concave part, a floating block and an elastic piece. By means of the mode, the stamping die for negative angle bending not only improves accuracy, stability and high efficiency of negative angle forming processing of a material belt through matching of the forming block, the bending forming punch and other structures, but also can effectively prevent interference between stamping equipment and the material belt, and improves stamping quality of the material belt. The structure of the stamping die is simplified, the size of the die is reduced, the structure is compact, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of stamping equipment technology, and in particular to a stamping die for negative angle bending. Background Technology

[0002] Stamping dies are forming processing devices used to apply external force to sheet metal, strip, tube and profile, causing plastic deformation or separation, thereby obtaining workpieces (stamped parts) of the required shape and size.

[0003] However, existing continuous stamping dies are prone to interference with the strip when forming negative angles, or even fail to form negative angles at all, which reduces the quality and efficiency of stamping. Therefore, improvements are needed. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A stamping die for negative angle bending is provided, comprising: an upper die base, an upper ejector pin, a lower die base, a forming block, a clearance slot, a negative angle forming protrusion, a negative angle forming limiting surface, a sliding guide block, a limiting block, a bending forming punch, a negative angle forming recess, a floating material block, and an elastic element.

[0006] The limiting block and the bending forming punch are fixedly mounted on the lower die base. The top of the bending forming punch is provided with the negative angle forming recess. A gap is provided between the limiting block and the bending forming punch. Inclined surfaces are provided on the opposite sidewalls of the limiting block and the bending forming punch to form an inclined guide groove between the limiting block and the bending forming punch. The floating material block is vertically and dynamically mounted on the lower die base outside the bending forming punch via the elastic element.

[0007] The forming block is movably connected to the lower die base via the elastic element, so that the elastic element drives the forming block to move up and down above the bending forming punch. The forming block is provided with a downward-facing clearance groove to allow the raised portions of the strip on one or both sides to pass through. The negative angle forming protrusion is provided at the opening of the clearance groove and protrudes inward to cooperate with the negative angle forming recess to perform negative angle bending on the strip. The negative angle forming limiting surface is inclinedly provided at the top of the negative angle forming protrusion, and its upper end extends outward to contact the side wall of the forming block to match the bending angle of the forming strip. The bottom surface of the negative angle forming protrusion cooperates with the floating material block to press and fix the strip.

[0008] The bottom surface of the upper mold base is provided with the upper ejector rod. The bottom of the upper ejector rod contacts the top surface of the forming block to drive the forming block to descend. The lower part of the forming block is provided with a sliding guide block. The sliding guide block is movably connected to the guide groove, so that the forming block moves to the lower left along the guide groove under the action of the upper ejector rod to approach the strip and complete the bending process, or moves to the upper right under the action of the elastic element to separate from the bent strip.

[0009] In a preferred embodiment of this utility model, the elastic element is a nitrogen spring or a spring coil.

[0010] In a preferred embodiment of this invention, the upper push rod is slidably connected to the top surface of the molding block to improve service life.

[0011] In a preferred embodiment of this utility model, the bottom surfaces of the molding block and the floating block are connected to a lower push rod, and the lower push rod is movably connected to the lower mold base through an elastic element.

[0012] In a preferred embodiment of this utility model, the molding block, the negative angle molding protrusion, the negative angle molding limiting surface, and the sliding guide inclined block are an integral structure.

[0013] The beneficial effects of this utility model are: through the cooperation of the forming block and bending forming punch, it not only improves the accuracy, stability and efficiency of the negative angle forming process of the strip, but also effectively prevents interference between the stamping equipment and the strip, simplifies the structure of the stamping die, reduces the size of the die, and makes the structure compact and easy to use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0015] Figure 1 This is a schematic diagram of the structure of a preferred embodiment of a stamping die for negative angle bending according to the present invention during mold opening;

[0016] Figure 2 This is a schematic diagram of the mold closing structure of a preferred embodiment of a stamping die for negative angle bending according to this utility model. Detailed Implementation

[0017] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] Please see Figure 1-2 The embodiments of this utility model include:

[0019] A stamping die for negative angle bending includes the following structure: upper die base 14, upper ejector rod 1, lower die base, lower ejector rod 2, forming block 3, clearance slot 4, negative angle forming protrusion 5, negative angle forming limiting surface 6, sliding guide inclined block 7, limiting block 8, bending forming punch 9, negative angle forming concave part 10, floating material block 11, and elastic element 12.

[0020] The limiting block and the bending forming punch are fixedly mounted on the lower die base. The top of the outer side of the bending forming punch is provided with a negative angle forming recess. The opposite sidewalls of the limiting block and the bending forming punch are provided with inclined surfaces, and a gap is provided between the limiting block and the bending forming punch to form an inclined guide groove 13 between the limiting block and the bending forming punch. The floating material block is raised and lowered on the lower die base outside the bending forming punch by means of an elastic element. The floating material block is driven to reset upward by the elastic element to lift and position the strip 15.

[0021] The forming block is movably connected to the lower die base via an elastic element, which drives the forming block to move up and down above the bending forming punch. The forming block is provided with a downward-facing clearance groove to allow the raised parts of one or both sides of the strip to pass through, preventing the forming block from interfering with the strip. The negative angle forming protrusion is located at the opening of the clearance groove and protrudes inward, cooperating with the negative angle forming concave part to perform negative angle bending on the strip. The negative angle forming limiting surface is inclinedly located on the top of the negative angle forming protrusion, and its upper end extends outward to contact the side wall of the forming block to match the bending angle of the forming strip.

[0022] The bottom surface of the upper mold base is equipped with two upper ejector rods. The bottom of the upper ejector rods contacts the top surface of the forming block to drive the forming block to descend. The lower part of the forming block is equipped with a sliding guide sloping block, which is movably connected to the guide sloping groove. This allows the forming block to move to the left and down along the guide sloping groove under the action of the upper ejector rods to approach the material strip and complete the bending process, or to move upward and right under the action of the elastic element to detach from the bent material strip and facilitate the rearward conveying and processing of the material strip.

[0023] The bottom surfaces of the forming block and the floating block are connected to a lower ejector rod, which is movably connected to the lower mold base through an elastic element to limit the minimum downward stroke position of the forming block and the floating block.

[0024] More preferably, the elastic element can be a nitrogen spring coil.

[0025] During mold closing, the upper mold base drives the upper ejector rod to move downwards until it contacts the top surface of the forming block. The upper mold base continues to drive the upper ejector rod and the forming block to move to the lower left along the guide groove, so that the negative angle forming protrusion approaches the negative angle forming concave part for negative angle bending. The bent strip partially contacts the negative angle forming limiting surface to improve the accuracy of bending.

[0026] When the mold is opened, the upper mold base drives the upper ejector rod to move upward until it separates from the top surface of the molding block. Under the action of the elastic element, the molding block moves to the upper right along the guide groove, so that the negative angle molding protrusion moves away from the negative angle molding concave part and the material strip.

[0027] The beneficial effects of this utility model of a stamping die for negative angle bending are: through the cooperation of the forming block and the bending forming punch, it not only improves the accuracy, stability and efficiency of the negative angle forming process of the strip, but also effectively prevents interference between the stamping equipment and the strip, simplifies the structure of the stamping die, reduces the size of the die, and makes it compact and easy to use.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A press die for negative angle bending, characterized by, include: Upper die holder, upper ejector pin, lower die holder, forming block, clearance slot, negative angle forming protrusion, negative angle forming limiting surface, sliding guide inclined block, limiting block, bending forming punch, negative angle forming concave part, floating material block, elastic component. The limiting block and the bending forming punch are fixedly mounted on the lower die base. The top of the bending forming punch is provided with the negative angle forming recess. A gap is provided between the limiting block and the bending forming punch. Inclined surfaces are provided on the opposite sidewalls of the limiting block and the bending forming punch to form an inclined guide groove between the limiting block and the bending forming punch. The floating material block is vertically and dynamically mounted on the lower die base outside the bending forming punch via the elastic element. The forming block is movably connected to the lower die base via the elastic element, so that the elastic element drives the forming block to move up and down above the bending forming punch. The forming block is provided with a downward-facing clearance groove to allow the raised portions of the strip on one or both sides to pass through. The negative angle forming protrusion is provided at the opening of the clearance groove and protrudes inward to cooperate with the negative angle forming recess to perform negative angle bending on the strip. The negative angle forming limiting surface is inclinedly provided at the top of the negative angle forming protrusion, and its upper end extends outward to contact the side wall of the forming block to match the bending angle of the forming strip. The bottom surface of the negative angle forming protrusion cooperates with the floating material block to press and fix the strip. The bottom surface of the upper mold base is provided with the upper ejector rod. The bottom of the upper ejector rod contacts the top surface of the forming block to drive the forming block to descend. The lower part of the forming block is provided with a sliding guide block. The sliding guide block is movably connected to the guide groove, so that the forming block moves to the lower left along the guide groove under the action of the upper ejector rod to approach the strip and complete the bending process, or moves to the upper right under the action of the elastic element to separate from the bent strip.

2. The stamping die for negative angle bending according to claim 1, wherein The elastic element uses a nitrogen spring or a spring coil.

3. The stamping die for negative angle bending according to claim 1, wherein The top rod is slidably connected to the top surface of the molding block to improve service life.

4. The stamping die for negative angle bending according to claim 1, wherein The bottom surfaces of the forming block and the floating block are connected to a lower ejector rod, which is movably connected to the lower mold base through an elastic element.

5. The stamping die for negative angle bending according to claim 1, wherein The molding block, the negative angle molding protrusion, the negative angle molding limiting surface, and the sliding guide inclined block are an integral structure.

Images