Stamping device for oval metal insert

Abstract

The utility model discloses a stamping device for oval metal inserts, which comprises a stamping die assembly and a stamping rod assembly which are split, the stamping die assembly comprises a lower die frame, a lower groove is arranged in the middle of the lower die frame, a positioning rod connected with the lower die frame in a sliding mode is arranged on the inner side of the lower groove, an elastic piece is connected between the positioning rod and the lower die frame, and the lower die frame is connected with the stamping rod assembly. The end part of the positioning rod extends to the outer side of the lower groove and is used for buckling and limiting an inner hole of the metal insert; the punching rod assembly comprises an upper die frame, a forming cavity is formed in the middle of the upper die frame, a punching rod fixedly connected with the upper die frame is arranged on the inner side of the forming cavity, the end of the punching rod extends to the outer side of the forming cavity and is used for buckling and limiting an inner hole of the metal insert, and the punching rod and the positioning rod are coaxially arranged. According to the utility model, the elliptical metal insert can be punched and formed.

Description

Technical Field

[0001] The utility model relates to a stamping die, in particular to a stamping device for elliptical metal inserts. Background Art

[0002] In the current automobile production process, an elliptical metal insert is required. The middle of the metal insert forms a step portion protruding outward, and the cross-sectional shape of the inner hole, outer wall and step portion of the metal insert are all coaxially arranged ellipses. However, for metal inserts with this shape, there is currently no special stamping die, which makes it impossible for manufacturers to stamp the step portion outside the metal insert, which reduces the processing efficiency of the metal insert.

[0003] Therefore, a device capable of stamping and forming the metal insert is needed. Utility Model Content

[0004] The purpose of the utility model is to provide a punching device for an elliptical metal insert, which can realize the punching forming of the elliptical metal insert.

[0005] The technical solution of the utility model: a stamping device for elliptical metal inserts, comprising a split die assembly and a punch rod assembly, the die assembly comprising a lower die frame, a lower groove is provided in the middle of the lower die frame, a positioning rod slidably connected to the lower die frame is provided on the inner side of the lower groove, an elastic member is connected between the positioning rod and the lower die frame, the end of the positioning rod extends to the outside of the lower groove and is used to engage and limit the inner hole of the metal insert; the punch rod assembly comprises an upper die frame, a molding cavity is provided in the middle of the upper die frame, a punch rod fixedly connected to the upper die frame is provided on the inner side of the molding cavity, the end of the punch rod extends to the outside of the molding cavity and is used to engage and limit the inner hole of the metal insert, and the punch rod and the positioning rod are coaxially arranged.

[0006] In the aforementioned stamping device for elliptical metal inserts, an ejector rod slidably connected to the upper mold frame is provided on the outer side of the punch rod, the punch rod and the ejector rod are nested inside and outside, and the ejector rod is provided with a telescopic rod slidably connected to the upper mold frame on the side away from the molding cavity, and the telescopic rod is used to push the ejector rod outward.

[0007] In the aforementioned punching device for elliptical metal inserts, the cross-sectional shape of the ejector rod is consistent with the cross-sectional shape of the lower groove, and the cross-sectional shape of the punch rod is consistent with the cross-sectional shape of the positioning rod.

[0008] In the aforementioned punching device for elliptical metal inserts, when the lower die frame and the upper die frame are in a fully pressed state, the ends of the lower die frame and the upper die frame are attached to each other and the middle part of the metal insert extends into the molding cavity under the extrusion action.

[0009] In the aforementioned stamping device for elliptical metal inserts, when the lower mold frame and the upper mold frame are in a fully pressed state, one end of the ejector rod is in contact with the upper mold frame, and the other end of the ejector rod is located on the inner side of the bottom surface of the molding cavity and forms an upper groove for locking and limiting the metal insert.

[0010] In the aforementioned punching device for elliptical metal inserts, when the lower die frame and the upper die frame are in a completely pressed state, the punch rod and the metal insert are nested inside and outside and interlocked with each other, and the positioning rod and the metal insert are separated from each other.

[0011] Compared with the prior art, the utility model has the following characteristics:

[0012] (1) By coordinating the structures of the upper die frame and the lower die frame, during processing, the operator can first buckle the metal insert blank of the elliptical tube shape into the lower groove, and then the lower die frame moves downward and extrude the blank, so that the upper end of the blank is buckled into the upper groove under the extrusion action, and at the same time, the punch causes the positioning rod to contract after the movement and then buckles and limits the inner hole of the blank, thereby realizing the buckling and limiting of the inner wall and the outer walls at both ends of the blank; and under the limiting action, the subsequent extrusion of the lower die frame can cause the non-limiting area of ​​the outer wall of the blank to deform and bulge toward the surrounding forming cavity, that is, the stamping forming of the step portion is realized;

[0013] (2) After the metal insert is formed by stamping, the inner hole of the metal insert is in a mutually engaged state with the punch, so that the upper die frame can drive the metal insert to separate from the lower die frame through the punch after resetting and rising, and then the ejector rod extends to separate the metal insert from the punch, that is, the metal insert is automatically unloaded after stamping, thereby improving the stamping efficiency of the metal insert;

[0014] Therefore, the utility model can realize the stamping forming of the elliptical metal insert. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model in an initial state;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model after being completely pressed together;

[0017] Figure 3 yes Figure 2 A-axis enlarged view.

[0018] The markings in the attached drawings are: 1-lower mold frame, 2-lower groove, 3-positioning rod, 4-elastic member, 5-upper mold frame, 6-molding cavity, 7-punch rod, 8-ejection rod, 9-telescopic rod, 10-upper groove. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0020] Embodiment. A punching device for an elliptical metal insert, comprising: Figure 1 As shown, it includes a split die assembly and a punch rod 7 assembly, the die assembly includes a lower die frame 1, a lower groove 2 is provided in the middle of the lower die frame 1, a positioning rod 3 slidably connected to the lower die frame 1 is provided on the inner side of the lower groove 2, an elastic member 4 is connected between the positioning rod 3 and the lower die frame 1, the elastic member 4 can be a compression spring, the inner end of the compression spring is threadedly connected to the screw on the lower die frame 1 for axial limitation, the end of the positioning rod 3 extends to the outside of the lower groove 2 and is used to engage and limit the inner hole of the metal insert; the punch rod 7 assembly includes an upper die frame 5, an external connection driving mechanism of the upper die frame 5, a molding cavity 6 is provided in the middle of the upper die frame 5, a punch rod 7 fixedly connected to the upper die frame 5 is provided on the inner side of the molding cavity 6, the end of the punch rod 7 extends to the outside of the molding cavity 6 and is used to engage and limit the inner hole of the metal insert, and the punch rod 7 and the positioning rod 3 are coaxially arranged.

[0021] The outer side of the punch rod 7 is provided with an ejector rod 8 which is slidably connected to the upper mold frame 5. The punch rod 7 and the ejector rod 8 are nested inside and outside. The ejector rod 8 is provided with a telescopic rod 9 which is slidably connected to the upper mold frame 5 on the side away from the molding cavity 6. The telescopic rod 9 is used to push the ejector rod 8 outward.

[0022] The cross-sectional shape of the ejector rod 8 is consistent with the cross-sectional shape of the lower groove 2 , and the cross-sectional shape of the punch rod 7 is consistent with the cross-sectional shape of the positioning rod 3 .

[0023] When the lower mold frame 1 and the upper mold frame 5 are in a completely pressed state, the ends of the lower mold frame 1 and the upper mold frame 5 are attached to each other and the middle part of the metal insert extends into the molding cavity 6 under the extrusion effect.

[0024] When the lower mold frame 1 and the upper mold frame 5 are in a fully pressed state, one end of the ejector rod 8 is in contact with the upper mold frame 5, and the other end of the ejector rod 8 is located on the inner side of the bottom surface of the molding cavity 6 and forms an upper groove 10 for locking and limiting the metal insert, and the upper groove 10 and the molding cavity 6 are connected to each other.

[0025] When the lower mold frame 1 and the upper mold frame 5 are in a completely pressed state, the punch 7 and the metal insert are nested inside and outside and interlocked with each other, and the positioning rod 3 and the metal insert are separated from each other.

[0026] Working principle of the utility model: When the utility model is used, the operator first buckles the metal insert blank of the elliptical tube shape on the positioning rod 3, and the lower groove 2 limits the bottom outer wall of the blank after the blank is buckled. After the blank is installed, the lower mold frame 1 and the positioning rod 3 are pressed down together, so that the positioning rod 3 extends into the inner hole of the blank after being pressed down and squeezes the positioning rod 3, and the top of the outer wall of the blank is buckled into the upper groove 10. When the upper end of the blank and the ejector rod 8 are in contact with each other, the top and bottom outer walls of the blank are limited by the upper groove 10 and the lower groove 2 respectively, and the inner hole of the blank is limited by the positioning rod 3 and the punch 7, so that the upper mold frame 5 will drive the middle part of the outer wall of the blank to deform and bulge outward after continuing to press down, and the protruding part is height-limited by the molding cavity 6, thereby forming a step structure.

[0027] When the upper die frame 5 moves to fit with the lower die frame 1, the metal insert is stamped and formed, and the punch 7 completely passes through the metal insert in this state; then the upper die frame 5 moves upward to reset, and the punch 7 drives the metal insert to disengage from the lower groove 2 after the movement. When the upper die frame 5 moves into place, the telescopic rod 9 drives the ejection rod 8 to eject outward, so that the metal insert is separated from the upper groove 10 and the punch 7 under the action of extrusion, and then falls to the outside, that is, the metal insert is discharged after stamping.

Claims

1. A punching device for oval metal inserts, characterized in that: The invention comprises a split die assembly and a punch rod assembly, wherein the die assembly comprises a lower die frame (1), a lower groove (2) is provided in the middle of the lower die frame (1), a positioning rod (3) slidably connected to the lower die frame (1) is provided on the inner side of the lower groove (2), an elastic member (4) is connected between the positioning rod (3) and the lower die frame (1), the end of the positioning rod (3) extends to the outer side of the lower groove (2) and is used to engage and limit the inner hole of the metal insert; the punch rod assembly comprises an upper die frame (5), a molding cavity (6) is provided in the middle of the upper die frame (5), a punch rod (7) fixedly connected to the upper die frame (5) is provided on the inner side of the molding cavity (6), the end of the punch rod (7) extends to the outer side of the molding cavity (6) and is used to engage and limit the inner hole of the metal insert, and the punch rod (7) and the positioning rod (3) are coaxially arranged.

2. The punching device for oval metal inserts according to claim 1, characterized in that: The outer side of the punch rod (7) is provided with an ejector rod (8) slidably connected to the upper mold frame (5); the punch rod (7) and the ejector rod (8) are nested inside and outside; the ejector rod (8) is provided with a telescopic rod (9) slidably connected to the upper mold frame (5) on the side away from the molding cavity (6); the telescopic rod (9) is used to push the ejector rod (8) outward.

3. The punching device for oval metal inserts according to claim 2, characterized in that: The cross-sectional shape of the ejector rod (8) is consistent with the cross-sectional shape of the lower groove (2), and the cross-sectional shape of the punch rod (7) is consistent with the cross-sectional shape of the positioning rod (3).

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