Device for forming metal plate flanging hole

Abstract

The utility model provides a device for forming a metal plate flanging hole, and the device comprises a die body which is provided with a first through hole; the gland is provided with a second through hole; wherein a part is mounted on the upper surface of the die body, and the part is provided with a hole to be flanged and a lug hole; the extrusion rod sequentially penetrates through the second through hole, the to-be-flanged hole and the first through hole and is used for flanging the to-be-flanged hole; the extrusion rod is in interference fit with the second through hole; the device for forming the metal plate flanged hole is simple in structure, qualified flanged hole products are pressed according to actual production pressure test verification, the device is suitable for forming flanged holes which are made of the same material, have different thicknesses and are pressed by different products and have the same hole pattern and size, the device can be used as a universal flanged hole forming die, and tool input cost is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of sheet metal, and particularly relates to a device for forming a flanging hole in sheet metal. Background Art

[0002] For the holes on aircraft sheet metal parts, in order to improve strength and increase stiffness, flanging processing needs to be carried out on the opened holes. For stainless steel parts (0Cr18Ni9) with a thickness H≥1.5mm, when using a rubber bladder forming press, the flanging holes cannot be formed properly, and using a special flanging die has a high cost and poor versatility.

[0003] Therefore, a device for forming a flanging hole in sheet metal is proposed, which is simple to operate and highly practical, and can be universal for flanging holes with the same hole shape size for the same material with different thicknesses and different products. Utility Model Content

[0004] Purpose of the Application: Overcoming the deficiency that the rubber bladder press cannot form the flanging of stainless steel parts properly, a device for forming a flanging hole in sheet metal is proposed.

[0005] This application provides a device for forming a flanging hole in sheet metal, and the device includes:

[0006] A die body with a first through hole;

[0007] A gland with a second through hole; wherein, the part is installed on the upper surface of the die body, and the part has a flanging hole to be formed and an ear hole.

[0008] An extrusion rod passes through the second through hole, the flanging hole to be formed and the first through hole in sequence to flange the flanging hole to be formed; wherein, the extrusion rod is in interference fit with the second through hole.

[0009] Preferably, the device further includes a positioning pin; pin holes are opened on both the die body and the gland, and the positioning pin passes through the ear hole and the pin hole to realize the positioning of the part.

[0010] Preferably, the device further includes:

[0011] A hydraulic press for providing pressure to the gland; wherein, the gland is installed on the hydraulic press, and the extrusion rod presses the part downward along with the gland to form the flanging hole to be formed in place.

[0012] Preferably, the extrusion rod is a three-section round rod, the outer diameter of the lower small round rod is the same as the inner diameter of the flanging hole to be formed in the part, the middle is in interference fit with the second through hole, and the upper end is larger than the second through hole and is placed on the upper plane of the gland.

[0013] Preferably, a lifting ring hole is provided at the upper end of the extrusion rod for mold lifting.

[0014] Preferably, the material of the extrusion rod is LD steel

[0015] The beneficial technical effects of this application are as follows:

[0016] The present utility model provides a device for forming a flanging hole on a formed sheet metal. Its structure is simple. Through actual production and pressure testing verification, qualified flanging products can be pressed out. Moreover, it is applicable to forming flanging holes of the same hole shape size for the same material with different thicknesses and different products, and can be used as a general flanging hole forming die, reducing the tooling investment cost. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a device for forming a flanging hole on a formed sheet metal provided by an embodiment of this application;

[0018] Figure 2 is a cross-sectional view of a device for forming a flanging hole on a formed sheet metal provided by an embodiment of this application. Detailed Embodiments

[0019] Please refer to Figure 1 and Figure 2 . The device for forming a flanging hole on a formed sheet metal provided by this application consists of a die body 1, a gland 2, an extrusion rod 3, and a positioning pin 4.

[0020] The die body fits with the inner surface of the part, the gland presses the outer surface of the part. The part has lugs on both sides. At the same time, pin holes are drilled on the die body and the gland. The positioning pin passes through the lug holes of the part and the pin holes of the die body to realize the positioning of the part and the guiding of the die body. The gland is installed on a hydraulic press, and the extrusion rod presses the part downward along with the gland to form the flanging hole in place.

[0021] Furthermore, the extrusion rod is composed of three sections of round rods. The outer diameter of the lower small round rod is the same as the inner diameter of the flanging hole of the part. The middle part has a tight fit with the through hole of the gland, and the upper part is larger than the through hole of the gland and is placed on the upper plane of the gland.

[0022] Furthermore, the positioning pin has a tight fit with the pin hole of the gland and a sliding fit with the pin hole of the die body.

[0023] Furthermore, this device can form multiple flanging holes simultaneously.

[0024] Furthermore, the heights of multiple extrusion rods need to be equal.

[0025] Preferably, the material of the extrusion rod is LD steel.

[0026] Furthermore, a lifting ring hole is opened at the upper end of the extrusion rod for mold lifting.

[0027] The utility model provides a method and a device for forming a flanging hole on a formed sheet metal, which has a simple structure. Through actual production and pressure testing verification, qualified flanging products can be pressed out. Moreover, it is applicable to flanging hole forming of the same material with different thicknesses and the same hole shape size for different products, and can be used as a general flanging hole forming die, reducing the investment cost of tooling. In addition, the forming method and device for the sheet metal have low requirements for equipment and can be widely promoted and used on a large scale.

[0028] In other embodiments, a method for forming a flanging hole on a formed sheet metal provided by this application includes the following steps:

[0029] Step 1: Blanking: Receive and cut the materials, and clean, degrease, and remove paint letters.

[0030] Step 2: Laser cutting: Laser cut the lugs and prefabricated holes according to the developed drawing. After laser cutting, grind the burrs to remove the laser cutting marks.

[0031] Step 3: Die trial: Install the gland on the hydraulic press, and the positioning pins on both sides follow the gland to position and guide the die body for die trial.

[0032] Step 4: Forming: The extrusion rod presses the part downward along with the gland to form the flanging hole in place.

[0033] Step 5: Passivation: Passivate the stainless steel to form qualified parts.

Claims

1. A device for forming a flanging hole on a formed sheet metal, characterized in that, The device includes: A die body having a first through hole; A gland having a second through hole; wherein, a part is mounted on the upper surface of the die body, and the part has a hole to be flanged and an ear hole; An extrusion rod sequentially passes through the second through hole, the hole to be flanged and the first through hole to flange the hole to be flanged; wherein, the extrusion rod is in interference fit with the second through hole.

2. The device according to claim 1, characterized in that, The device further includes a positioning pin; pin holes are provided on both the die body and the gland, and the positioning pin passes through the ear hole and the pin hole to realize the positioning of the part.

3. The device according to claim 2, characterized in that, The device further includes: A hydraulic press for providing pressure to the gland; wherein, the gland is mounted on the hydraulic press, and the extrusion rod squeezes the part downward along with the gland to form the hole to be flanged in place.

4. The device according to claim 3, characterized in that The extrusion rod is a three-section round rod, the outer diameter of the lower small round rod is the same as the inner diameter of the hole to be flanged of the part, the middle is in interference fit with the second through hole, and the upper end is larger than the second through hole and is placed on the upper plane of the gland.

5. The device according to claim 4, characterized in that A lifting ring hole is provided at the upper end of the extrusion rod for mold lifting.

6. The device according to claim 5, characterized in that The material of the extrusion rod is LD steel.

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