CN206981546U - A kind of double internal lock moulds for thin plate impressing connection - Google Patents

Abstract

The utility model relates to a double inner-lock mold used for embossing connection of thin plates, which belongs to the technical field of mold design. The double internal lock mold for thin plate embossing connection includes a punch and a lower mold matched with the punch, the lower mold includes a circular boss, an inner circular column and an outer circular column, and the bottom of the punch is provided There is a cylindrical hole, and an inner groove is formed between the circular boss and the inner circular column, and an outer groove is formed between the inner circular column and the outer circular column. The double inner-lock mold has greater connection strength, more reliability, simple operation, environmental protection and economy, easy forming and easy mold ejection.

Description

A Double Internal Locking Die for Printing and Connection of Thin Plates

technical field

The utility model relates to a double inner lock mold used for embossing connection of thin plates, which belongs to the technical field of mold design.

Background technique

With the continuous development of aviation and automobile manufacturing, the application of lightweight structures and new lightweight materials is becoming more and more extensive. Aluminum, magnesium alloy and other plates are most widely used in the fields of aviation and automobile manufacturing. The existing plate connection methods include welding, bolting and riveting, etc., but due to the chemical or physical properties of these plates, the welding performance is poor or cannot be welded. Bolt connection and riveting need to be pre-drilled, the process is complicated, the sealing performance is poor, and additional connecting parts such as bolts and rivets are required. The embossed connection is a new technology applied to the connection of plates. It implements cold extrusion deformation on the plate under the action of external force through the embossing connection mold, forcing the combination of materials to be connected to flow at the connection point, and the connection point is formed by metal plastic deformation to realize the material connection. However, the current embossed connection is a single inner lock connection point. After the plates are connected, there are often some problems such as insufficient connection strength or poor shape. It is necessary to connect the plates multiple times, which is not only a cumbersome process, but also inefficient. For this reason, it is necessary to develop a double inner lock embossing mold for thin plate embossing connection.

Contents of the invention

Aiming at the problems and deficiencies in the above-mentioned prior art, the utility model provides a double inner-locking die used for thin plate embossing connection. The double inner-lock mold has greater connection strength, more reliability, simple operation, environmental protection and economy, easy forming and easy mold ejection. The utility model is realized through the following technical solutions.

A double internal lock mold for thin plate stamping connection, including a punch and a lower mold matched with the punch, the lower mold includes a circular boss from the inside to the outside, an inner ring column and an outer ring column, The bottom of the punch is provided with a cylindrical hole, an inner groove is formed between the circular boss and the inner circular column, and an outer groove is formed between the inner circular column and the outer circular column.

The circular boss has a draft angle of 0.5°-2°.

The working principle of the utility model is as follows: as shown in Figure 3, put the two plates on the lower die, when the punch begins to descend with the cylindrical hole, the upper and lower plates begin to undergo small elastic-plastic deformation, and the punching When the head goes down to a certain distance, the lower plate continues to deform downward due to the extrusion of the upper plate. As the punch continues to descend, the plate begins to fill the gap of the lower die and flow into the inner and outer grooves of the lower die. And form a mechanical interlock structure with a certain amount of mosaic, and then form a double inner lock embossing connection structure with two layers of inner locks on the inner and outer rings.

The beneficial effects of the utility model are:

1. The utility model adopts a double inner lock embossed connection structure. Compared with the existing single inner lock embossed connection, the strength of the double inner lock embossed connection point is high and the connection is reliable.

2. Both the punch and the lower die designed in the utility model have necessary excessive rounded corners, and the central boss of the lower die has a draft slope, which reduces the wear of the die and facilitates the ejection of the connected plates.

3. The lower mold designed by the utility model has inner and outer ring grooves, and the function of the grooves increases the internal deformation space, which is beneficial to the forming of the plate.

4. The utility model can be used for the connection between metal, non-metal, and metal plates of different materials.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of punch of the present utility model and lower mold;

Fig. 2 is a partial sectional view of the punch of the utility model;

Fig. 3 is a sectional view of the lower die of the utility model;

Fig. 4 is a schematic diagram of the working principle of the utility model.

In the figure: 1-cylindrical hole, 2-circular boss, 3-inner ring column, 4-outer ring column, 5-outer groove, 6-inner groove.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.

Example 1

As shown in Figures 1 and 2, the double internal lock mold for stamping and connection of thin plates includes a punch and a lower mold matched with the punch. The lower mold includes a circular boss 2 from the inside to the outside, an inner circle Ring column 3 and outer ring column 4, the bottom of the punch is provided with a cylindrical hole 1, an inner groove 6 is formed between the circular boss 2 and the inner ring column 3, the inner ring column 3 and the outer ring column 4 Outer grooves 5 are formed therebetween.

Wherein the circular boss 2 has a draft angle of 0.5°.

Example 2

As shown in Figures 1 and 2, the double internal lock mold for stamping and connection of thin plates includes a punch and a lower mold matched with the punch. The lower mold includes a circular boss 2 from the inside to the outside, an inner circle Ring column 3 and outer ring column 4, the bottom of the punch is provided with a cylindrical hole 1, an inner groove 6 is formed between the circular boss 2 and the inner ring column 3, the inner ring column 3 and the outer ring column 4 Outer grooves 5 are formed therebetween.

Wherein the circular boss 2 has a draft angle of 2°.

Example 3

As shown in Figures 1 and 2, the double internal lock mold for stamping and connection of thin plates includes a punch and a lower mold matched with the punch. The lower mold includes a circular boss 2 from the inside to the outside, an inner circle Ring column 3 and outer ring column 4, the bottom of the punch is provided with a cylindrical hole 1, an inner groove 6 is formed between the circular boss 2 and the inner ring column 3, the inner ring column 3 and the outer ring column 4 Outer grooves 5 are formed therebetween.

Wherein the circular boss 2 has a draft angle of 1°.

The specific implementation of the utility model has been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned implementation. Various changes are made.

Claims (2)

1. A double inner lock mold for thin plate stamping connection, including a punch and a lower mold matched with the punch, characterized in that: the lower mold includes a circular boss (2) from the inside to the outside, an inner A circular column (3) and an outer circular column (4), the bottom of the punch is provided with a cylindrical hole (1), and an inner groove (6) is formed between the circular boss (2) and the inner circular column (3). ), an outer groove (5) is formed between the inner circular column (3) and the outer circular column (4). 2. The double internal lock mold for stamping connection of thin plates according to claim 1, characterized in that: the circular boss (2) has a draft angle of 0.5°-2°.