High-precision secondary flanging stamping die

Abstract

The utility model discloses a high-precision secondary flanging stamping die, belongs to the technical field of stamping dies, and solves the problems that a sheet metal part is limited and fixed through matching of a positioning hole in a lug and a pin hole in an existing device, the lug needs to be cut off after the sheet metal part is stamped, and raw materials are wasted. Comprising a left half die, a right half die and a sheet metal part blank, bottom dies are arranged on the bottom faces of the left half die and the right half die, the sheet metal part blank is clamped in a sheet metal clamping groove, materials around a secondary flanging hole are extruded through rubber of a rubber bag, then the materials around the secondary flanging hole deform downwards along the edge of a primary flanging hole, and the secondary flanging hole is formed. The pressure of the rubber on the materials around the secondary flanging hole is continuously increased, then the materials around the secondary flanging hole are turned outwards towards the interior of the secondary flanging groove, secondary flanging can be completed, through the limiting effect of the sheet metal clamping groove on the sheet metal part blank, redundant leftover materials cannot be generated, and raw materials are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, in particular to a high-precision secondary flanging stamping die. Background Art

[0002] When a sheet metal part with a closed structure is flanged, the first flange is downward and the second flange is outward, which can enhance the structural strength of the sheet metal part.

[0003] After searching, the application with patent number 201720289541.X discloses a combined mold for forming a rubber bag of a sheet metal part with a secondary flanging hole, which is characterized in that: the mold is composed of a left half mold and a right half mold, the main body of the left half mold and the right half mold is a flat plate structure, an open semicircular surface corresponding to the left side of the flanging hole of the sheet metal part is on the right side of the left half mold, and an open semicircular surface corresponding to the right side of the flanging hole of the sheet metal part is on the left side of the right half mold, one end of the left half mold and the right half mold are hinged by a connecting shaft, and the other end of the left half mold and the right half mold are connected by a connecting pin. After the left half mold and the right half mold are combined, the left and right semicircular surfaces are connected to form a flanging hole surface corresponding to the flanging hole of the sheet metal part;

[0004] Although the combined die for forming the rubber bag of the sheet metal part with the secondary flanging hole presses down the prefabricated hole edge of the unfolded raw material to form the outward-turned film through the flexible downward pressure of the rubber, the combined die for forming the rubber bag of the sheet metal part with the secondary flanging hole limits and fixes the sheet metal part through the positioning holes and pin holes on the ear pieces. After the sheet metal part is stamped, the ear pieces need to be cut off, resulting in a waste of raw materials.

[0005] Therefore, we proposed a high-precision secondary flanging stamping die. Utility Model Content

[0006] In response to the shortcomings of the existing technology, the utility model provides a high-precision secondary flanging stamping die, which solves the problem that the existing device limits and fixes the sheet metal parts by cooperating with the positioning holes on the ear pieces and the pin holes, and the ear pieces need to be cut off after the sheet metal parts are stamped, resulting in waste of raw materials.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-precision secondary flanging stamping die, comprising a left half-die, a right half-die and a sheet metal blank, wherein the left half-die and the right half-die are respectively provided with a left semicircular surface and a right semicircular surface positioned opposite to each other, wherein the left semicircular surface and the right semicircular surface are butted together to form a primary flanging hole, and a secondary flanging hole corresponding to the primary flanging hole is provided in the middle of the top surface of the sheet metal blank;

[0008] The bottom surfaces of the left and right half molds are provided with bottom molds, and one ends of the left and right half molds are hinged on the top surface of the bottom mold through connecting shafts. The top surfaces of the left and right half molds are respectively provided with left limiting grooves and right limiting grooves, and the left limiting grooves and the right limiting grooves are connected to form a sheet metal clamping groove with the same specifications as the sheet metal blank. The left semicircular surface is provided on the bottom surface of the left limiting groove, and the right semicircular surface is provided on the bottom surface of the right limiting groove. A secondary flanging groove corresponding to the primary flanging hole is provided in the middle of the top surface of the bottom mold, and the sheet metal blank is movably sleeved inside the sheet metal clamping groove.

[0009] Preferably, the bottom surfaces of the left and right half molds are fitted with the top surface of the bottom mold, the diameter of the secondary flanging hole is smaller than the primary flanging hole, and the diameter of the secondary flanging groove is larger than the secondary flanging hole, wherein the left and right half molds are supported by the bottom mold, and when the sheet metal rough material is punched by the rubber bag, the rubber of the rubber bag punches the material around the secondary flanging hole, and then the material around the secondary flanging hole is deformed downward along the edge of the primary flanging hole, and the pressure of the rubber on the material around the secondary flanging hole is continued to increase, and then the material around the secondary flanging hole is turned outward toward the inside of the secondary flanging groove, thereby completing the secondary flanging.

[0010] Preferably, the left half mold and the right half mold are fixedly installed with symmetrically distributed handles on the side away from the connecting shaft, the cross-section of the handles is semicircular, the ends of the handles away from the left half mold and the right half mold are fitted together, and the outer surface of the fitted part is provided with a thread, wherein, by holding the handles, the left half mold and the right half mold can be rotated on the top surface of the bottom mold with the connecting shaft as the axis.

[0011] Preferably, the part of the handle away from the left half mold and the right half mold that fit together at one end is threadedly sleeved with a sleeve, wherein the two handles can be fixed together by threading the sleeve onto the outside of the handle, and then the left half mold and the right half mold can be limited and fixed on the top surface of the bottom mold.

[0012] Preferably, the outer surface of the sleeve is adhered with anti-slip rubber, wherein the anti-slip rubber facilitates gripping of the sleeve and increases the friction between the sleeve and the human hand.

[0013] The utility model provides a high-precision secondary flanging stamping die. It has the following beneficial effects:

[0014] The high-precision secondary flanging stamping die clamps the sheet metal blank in the sheet metal slot, squeezes the material around the secondary flanging hole through the rubber of the rubber bag, and then deforms the material around the secondary flanging hole downward along the edge of the primary flanging hole, and continues to increase the pressure of the rubber on the material around the secondary flanging hole, and then causes the material around the secondary flanging hole to turn inside and out of the secondary flanging slot, thereby completing the secondary flanging. The sheet metal slot limits the sheet metal blank, so that the secondary flanging hole can be aligned with the primary flanging hole, and no excess scrap is generated, thus saving raw materials and reducing processing costs. It solves the problem that the existing device limits and fixes the sheet metal by cooperating with the positioning hole and pin hole on the ear piece, and the ear piece needs to be cut off after the sheet metal is stamped, resulting in a waste of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a side structural diagram of the present utility model;

[0017] Figure 3 This is a schematic diagram of the split structure of the utility model;

[0018] Figure 4 It is a schematic cross-sectional structural diagram of the present utility model.

[0019] In the figure: 1. Left half mold; 11. Left limit groove; 12. Left semicircular surface; 2. Right half mold; 21. Right limit groove; 22. Right semicircular surface; 3. Bottom mold; 31. Secondary flanging groove; 4. Sleeve; 5. Sheet metal blank; 51. Secondary flanging hole; 6. Primary flanging hole; 7. Connecting shaft; 8. Handle; 81. Thread; 9. Sheet metal slot. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1:

[0022] like Figure 1-4As shown: it includes a left half mold 1 and a right half mold 2 and a sheet metal blank 5, the left half mold 1 and the right half mold 2 are respectively provided with a left semicircular surface 12 and a right semicircular surface 22 which are opposite to each other, the left semicircular surface 12 and the right semicircular surface 22 are butted together to form a primary flanging hole 6, a secondary flanging hole 51 corresponding to the primary flanging hole 6 is provided in the middle of the top surface of the sheet metal blank 5, the bottom surface of the left half mold 1 and the right half mold 2 is provided with a bottom mold 3, and a left half mold 1 and a right half mold 2 are respectively provided with a left semicircular surface 12 and a right semicircular surface 22 which are opposite to each other The ends are hinged on the top surface of the bottom mold 3 through the connecting shaft 7. The top surfaces of the left half mold 1 and the right half mold 2 are respectively provided with a left limiting groove 11 and a right limiting groove 21. The left limiting groove 11 and the right limiting groove 21 are connected to form a sheet metal slot 9 with the same specifications as the sheet metal blank 5. The left semicircular surface 12 is provided on the bottom surface of the left limiting groove 11, and the right semicircular surface 22 is provided on the bottom surface of the right limiting groove 21. The middle part of the top surface of the bottom mold 3 is provided with a hole corresponding to the primary flanging hole 6. The secondary flanging groove 31 of the sheet metal blank 5 is movably mounted inside the sheet metal slot 9, and the bottom surfaces of the left half mold 1 and the right half mold 2 are fitted with the top surface of the bottom mold 3. The diameter of the secondary flanging hole 51 is smaller than the primary flanging hole 6, and the diameter of the secondary flanging groove 31 is larger than the secondary flanging hole 51. By clamping the sheet metal blank 5 in the sheet metal slot 9, the rubber of the rubber bag squeezes the material around the secondary flanging hole 51, and then the material around the secondary flanging hole 51 is deformed downward along the edge of the primary flanging hole 6, and the pressure of the rubber on the material around the secondary flanging hole 51 is continuously increased, and then the material around the secondary flanging hole 51 is turned outward toward the inside of the secondary flanging groove 31, and the secondary flanging is completed. The sheet metal slot 9 has a limiting effect on the sheet metal blank 5, so that the secondary flanging hole 51 can be aligned with the primary flanging hole 6, and no excess scrap is generated, which saves raw materials and reduces processing costs.

[0023] Example 2:

[0024] like Figure 1-3 As shown: the left half mold 1 and the right half mold 2 are fixedly installed with symmetrically distributed handles 8 on the side away from the connecting shaft 7. The cross-section of the handle 8 is semicircular. The ends of the handle 8 away from the left half mold 1 and the right half mold 2 are fitted together, and the outer surface of the fitting part is provided with a thread 81. The part of the handle 8 away from the left half mold 1 and the right half mold 2 that are fitted together is threadedly covered with a sleeve 4, and the outer surface of the sleeve 4 is pasted with non-slip rubber. By holding the handle 8, the left half mold 1 and the right half mold 2 can be rotated on the top surface of the bottom mold 3 with the connecting shaft 7 as the axis. By threading the sleeve 4 onto the outside of the handle 8, the two handles 8 can be fixed together, and then the left half mold 1 and the right half mold 2 are limited and fixed on the top surface of the bottom mold 3. The non-slip rubber makes it easy to hold the sleeve 4, which increases the friction between the sleeve 4 and the human hand.

[0025] The working principle and usage process of the utility model: When using this high-precision secondary flanging stamping die, first place the device on the workbench of the rubber bag, then fit the left half mold 1 and the right half mold 2 together, and then thread the connecting shaft 7 onto the outer surface of the two handles 8, and then clamp the sheet metal blank 5 into the sheet metal slot 9, and then start the rubber bag, and use the rubber of the rubber bag to squeeze the material around the secondary flanging hole 51, and then make the material around the secondary flanging hole 51 deform downward along the edge of the primary flanging hole 6, and continue to increase the pressure of the rubber on the material around the secondary flanging hole 51, and then make the material around the secondary flanging hole 51 turn outward toward the inside of the secondary flanging groove 31, and the secondary flanging is completed, and then the connecting shaft 7 is unscrewed from the handle 8, and the handle 8 can be held to move the right half mold 2 and the bottom mold 3 to both sides, and finally the stamped sheet metal blank 5 can be taken out.

[0026] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0027] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-precision secondary flanging stamping die, comprising a left half-die (1), a right half-die (2) and a sheet metal blank (5), wherein the left half-die (1) and the right half-die (2) are respectively provided with a left semicircular surface (12) and a right semicircular surface (22) which are positioned opposite to each other, wherein the left semicircular surface (12) and the right semicircular surface (22) are butted together to form a primary flanging hole (6), and a secondary flanging hole (51) corresponding to the primary flanging hole (6) is provided in the middle of the top surface of the sheet metal blank (5); Its characteristics are: The bottom surfaces of the left half mold (1) and the right half mold (2) are provided with a bottom mold (3), one end of the left half mold (1) and the right half mold (2) are hinged on the top surface of the bottom mold (3) through a connecting shaft (7), the top surfaces of the left half mold (1) and the right half mold (2) are respectively provided with a left limiting groove (11) and a right limiting groove (21), the left limiting groove (11) and the right limiting groove (21) are connected to form a sheet metal clamping groove (9) with the same specifications as the sheet metal blank (5), the left semicircular surface (12) is provided on the bottom surface of the left limiting groove (11), and the right semicircular surface (22) is provided on the bottom surface of the right limiting groove (21), the middle part of the top surface of the bottom mold (3) is provided with a secondary flanging groove (31) corresponding to the primary flanging hole (6), and the sheet metal blank (5) is movably sleeved inside the sheet metal clamping groove (9).

2. A high-precision secondary flanging stamping die according to claim 1, characterized in that: The bottom surfaces of the left half mold (1) and the right half mold (2) are fitted with the top surface of the bottom mold (3); the diameter of the secondary flanging hole (51) is smaller than that of the primary flanging hole (6); and the diameter of the secondary flanging groove (31) is larger than that of the secondary flanging hole (51).

3. The high-precision secondary flanging stamping die according to claim 1, characterized in that: A symmetrically distributed handle (8) is fixedly mounted on one side of the left half mold (1) and the right half mold (2) away from the connecting shaft (7). The cross section of the handle (8) is semicircular. The ends of the handle (8) away from the left half mold (1) and the right half mold (2) are fitted together, and a thread (81) is provided on the outer surface of the fitted portion.

4. The high-precision secondary flanging stamping die according to claim 3, characterized in that: The threaded portion of the handle (8) away from the left half mold (1) and the right half mold (2) where one end fits together is provided with a sleeve (4).

5. The high-precision secondary flanging stamping die according to claim 4, characterized in that: The outer surface of the sleeve (4) is pasted with anti-slip rubber.

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