Negative angle stamping mechanism for progressive die

Abstract

The utility model discloses a negative angle stamping mechanism for a progressive die. The negative angle stamping mechanism comprises an upper die base, a negative angle bending punch, a driving wedge, a lower die base, a material supporting base, a forming female die, a connecting piece, an elastic piece, a negative angle forming part and an avoiding groove. By means of the mode, according to the negative angle stamping mechanism for the progressive die, through cooperation of the driving wedge, the negative angle bending punch and the forming female die, accuracy, stability and high efficiency of negative angle forming processing of a material belt are improved, interference with the material belt is effectively avoided, and therefore the yield of products and the stamping efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of stamping equipment technology, and in particular to a negative angle stamping mechanism for continuous die. 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 negative angle punching mechanism for progressive dies is provided, comprising: an upper die base, a negative angle bending punch, a driving wedge, a lower die base, a material support base, a forming die, a connecting member, an elastic member, a negative angle forming part, and a clearance groove.

[0006] The upper die base is provided with the negative angle bending punch and the driving wedge. The material support seat is provided on the lower die base along the direction of material strip advance. Each side of the lower die base on the material support seat is provided with a limiting guide groove. The connecting member and the forming die are movably disposed in the limiting guide groove. The outer end of the connecting member is connected to the limiting guide groove through an elastic member, and its inner end is connected to the forming die, so that the forming die can be driven to move outward and reset through the elastic member and the connecting member. The top of the forming die and the bottom of the driving wedge are provided with driving inclined guide surfaces that contact and cooperate with each other. The front end and rear end of the forming die along the feeding direction are each provided with a negative angle forming part. The negative angle forming part cooperates with the negative angle bending punch to perform inward negative angle punching forming of the material strip. The forming die below each negative angle forming part is provided with an avoidance groove to prevent interference with the bending part of the lower part of the material strip.

[0007] In a preferred embodiment of this utility model, the driving wedge is located on both sides of the negative angle bending punch.

[0008] In a preferred embodiment of this utility model, the material support seat is disposed on the lower mold base by means of an elastic element.

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

[0010] In a preferred embodiment of the present invention, the connector includes a connecting block or a connecting rod, wherein the connecting rod is located on both sides of the driving wedge; the connecting block is provided with a clearance position to facilitate the movement of the driving wedge.

[0011] In a preferred embodiment of this utility model, a pressure plate is provided on the upper mold base, and the pressure plate is provided with a through-hole that allows a negative angle bending punch to pass through.

[0012] The beneficial effects of this utility model are: by coordinating the drive wedge, the negative angle bending punch, and the forming die, the accuracy, stability, and efficiency of the negative angle forming process of the strip are improved, and interference with the strip is effectively avoided, thereby improving the product yield and stamping efficiency. Attached Figure Description

[0013] 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:

[0014] Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the negative angle stamping mechanism for a progressive die during mold opening.

[0015] Figure 2 This is a schematic diagram of the mold closing structure of a preferred embodiment of the negative angle punching mechanism for a progressive die according to this utility model;

[0016] Figure 3 This is a cross-sectional structural schematic diagram of a preferred embodiment of a negative angle stamping mechanism for a progressive die according to the present invention. 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 1-3 The embodiments of this utility model include:

[0019] A negative angle punching mechanism for progressive dies includes: an upper die base 1, a negative angle bending punch 2, a driving wedge 3, a lower die base 4, a material support base, a forming die 5, a connecting piece 6, an elastic piece 7, a negative angle forming part 8, and a clearance groove 9.

[0020] The bottom of the upper die holder is equipped with a negative angle bending punch and a drive wedge, with the drive wedge located on both sides of the negative angle bending punch.

[0021] The material support seat is elastically mounted on the lower die seat along the direction of material strip 10. Each side of the lower die seat is provided with a limiting guide groove 11. The connecting piece and the forming die are movably mounted in the limiting guide groove. The outer end of the connecting piece is connected to the limiting guide groove through an elastic element, and its inner end is connected to the forming die. The elastic element drives the forming die to move outward and reset. The top of the forming die and the bottom of the driving wedge are provided with mutually contacting driving inclined guide surfaces, so that the forming die moves inward under the action of the driving wedge to perform forming.

[0022] A negative angle forming part is provided on the front end and the rear end of the forming die along the feeding direction, so as to cooperate with the negative angle bending punch to perform inward negative angle bending forming of the strip. A clearance groove is provided on the forming die below each negative angle forming part to prevent interference with the bending part of the strip at the bottom.

[0023] More preferably, the elastic element can be a nitrogen spring or a spring coil.

[0024] More preferably, the connector can be a connecting block or a connecting rod. The connecting rod is located on both sides of the driving wedge; the connecting block is provided with clearance positions to facilitate the movement of the driving wedge.

[0025] More preferably, a pressure plate is provided on the upper die base, and the pressure plate is provided with an opening that allows a negative angle bending punch to pass through.

[0026] During mold closing, the upper mold base drives the drive wedge and negative angle bending punch to move downwards. The drive wedge contacts the forming die and pushes the forming die towards the material support seat until the forming die moves to the target position below the strip. The upper mold base continues to move downwards, and the pressure plate presses the strip onto the material support seat. The negative angle bending punch cooperates with the negative angle forming part on the forming die to complete the negative angle bending stamping.

[0027] When the mold is opened, the upper mold base drives the drive wedge and the negative angle bending punch to move upward. The forming die gradually separates from the drive wedge and moves outward to reset under the action of the elastic element, so as to separate from the product from the side of the strip and not interfere with the forming negative angle structure. At this time, the support seat moves upward to reset to lift the strip and drive the strip to move to the next station.

[0028] The beneficial effects of this utility model of a negative angle stamping mechanism for progressive dies are: by cooperating with the driving wedge, the negative angle bending punch and the forming die, the accuracy, stability and efficiency of the negative angle forming process of the strip are improved, and interference with the strip is effectively avoided, thereby improving the product yield and stamping efficiency.

[0029] 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 negative angle stamping mechanism for progressive dies, characterized in that, include: Upper die holder, negative angle bending punch, drive wedge, lower die holder, material support holder, forming die, connector, elastic component, negative angle forming part, clearance groove. The upper die base is provided with the negative angle bending punch and the driving wedge. The material support seat is provided on the lower die base along the direction of material strip advance. Each side of the lower die base on the material support seat is provided with a limiting guide groove. The connecting member and the forming die are movably disposed in the limiting guide groove. The outer end of the connecting member is connected to the limiting guide groove through an elastic member, and its inner end is connected to the forming die, so that the forming die can be driven to move outward and reset through the elastic member and the connecting member. The top of the forming die and the bottom of the driving wedge are provided with driving inclined guide surfaces that contact and cooperate with each other. The front end and rear end of the forming die along the feeding direction are each provided with a negative angle forming part. The negative angle forming part cooperates with the negative angle bending punch to perform inward negative angle punching forming of the material strip. The forming die below each negative angle forming part is provided with an avoidance groove to prevent interference with the bending part of the lower part of the material strip.

2. The negative angle stamping mechanism for a progressive die according to claim 1, characterized in that, The driving wedges are located on both sides of the negative angle bending punch.

3. The negative angle stamping mechanism for a progressive die according to claim 1, characterized in that, The material support seat is mounted on the lower die seat via an elastic element.

4. A negative angle stamping mechanism for a progressive die according to claim 1, characterized in that, The elastic element uses a nitrogen spring.

5. A negative angle stamping mechanism for a progressive die according to claim 1, characterized in that, The connector includes a connecting block or a connecting rod, wherein the connecting rod is located on both sides of the driving wedge; the connecting block is provided with clearance positions to facilitate the movement of the driving wedge.

6. A negative angle stamping mechanism for a progressive die according to claim 1, characterized in that, The upper die base is provided with a pressure plate, and the pressure plate is provided with a through-hole that allows a negative angle bending punch to pass through.

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