Flange-free trimming and blanking structure

Abstract

The utility model discloses a flange-free trimming blanking structure which sequentially comprises a punch, a guide core-fixing male die and a female die structure from top to bottom, and the bottom end of the punch is provided with a punch cutting edge used for guaranteeing that the blanking face of a product is a plane. The bottom end of the guide fixed core male die is provided with a straight section feature, and the bottom end of the straight section feature is provided with a guide feature; a blanking structure is arranged at the bottom end in the female die structure, a knife edge structure is arranged on the inner circle of the top end of the female die structure, and one side of the knife edge structure is an upper end slope support. The punch has the advantages that flange-free trimming blanking can be achieved, a knife edge is not prone to damage, tipping is not prone to occurring, the safety performance of the punch is improved, the extrusion cutting face of a product is a plane, the situation that a product collecting person is scratched due to the fact that the extrusion cutting face is an inclined opening is effectively avoided, and the production efficiency is improved. The problems that a punch is inconvenient to install and prone to abrasion and tipping, the tangent plane after a flange is cut off is an acute-angle face, and the risk of scratching a product collecting person is large are thoroughly solved.

Description

Technical Field

[0001] This utility model relates to the field of flange processing technology, specifically a flangeless edge-cutting and punching structure. Background Technology

[0002] Deep drawing is a common machining method that uses dies to draw flat blanks into various open hollow workpieces. It is widely used in the automotive, electronics, and electrical appliance industries. When designing a deep drawing process, a trimming allowance, or circumferential excess material, is usually included. This design method not only results in low material utilization but also requires the removal of excess material after drawing. Common trimming processes include secondary processing or rotary cutting. Secondary processing requires investment in new equipment, space, and personnel, significantly increasing production costs. Rotary cutting structures are more complex, and the design and processing capabilities are not possessed by everyone in this industry, thus limiting its widespread adoption. Neither of these methods aligns with the cost reduction and efficiency improvement requirements of modern companies. Chinese patent CN111842645A discloses a trimming device and method for thin-walled deep-drawn cylindrical parts. This patent is much simpler than secondary processing and rotary cutting structures, but it also has many drawbacks. For example, some existing punches are inconvenient to install and are prone to wear, chipping, and the cut surface after cutting the flange is a sharp angle, posing a significant risk of scratches to product collection personnel; existing core-setting punches use traditional hanging table installation, which is extremely inconvenient for maintenance and disassembly, and lacks guiding features, making it easy to damage the product; existing die structures do not consider material handling, which is not only inconvenient for material handling and requires additional devices, but also poses a risk of scratching the product; existing punching structures require the addition of new equipment, or are difficult to design and maintain, have high costs, and produce large burrs on the cut edges.

[0003] Therefore, a flangeless edge-cutting structure is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a flangeless edge-cutting structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flangeless cutting edge punching structure includes, from top to bottom, a punch, a guiding and centering punch, and a die structure. The bottom end of the punch is provided with a punch cutting edge to ensure that the punching surface of the product is flat.

[0007] The bottom end of the guiding and centering punch is provided with a straight section feature, and the bottom end of the straight section feature is provided with a guiding feature;

[0008] The die structure has a blanking structure at the bottom and a cutting edge structure at the top inner circle. One side of the cutting edge structure is supported by an upper inclined surface.

[0009] Furthermore, the cutting edge of the punch is planar.

[0010] Furthermore, the top of the guiding and centering punch is provided with a screw hole for connecting with the mold.

[0011] Furthermore, the guiding feature is tapered.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) The punch of this utility model can realize flangeless cutting edge punching, the blade is not easily damaged and not easily chipped, thus improving its safety performance. The product extrusion cut surface is flat, which effectively avoids the scratches caused to the personnel collecting the product due to the oblique extrusion cut surface. It completely solves the problems of inconvenient punch installation, easy wear, chipping, and the sharp angle surface after cutting the flange, which poses a great risk of scratches to the personnel collecting the product.

[0014] (2) By using the guiding and core-setting punch of this utility model, the guiding feature can be realized to avoid damaging the product, and the installation is convenient. It completely solves the problems of inconvenient maintenance and disassembly, lack of guiding features, and easy damage to the product.

[0015] (3) By adopting the concave die structure of this utility model, flangeless punching can be realized, the contact area with the product can be reduced, and the product can be easily dropped while ensuring that the product is less scratched. This completely solves the problems of inconvenient material handling and the risk of scratching the product.

[0016] (4) The flangeless cutting and punching structure of this utility model can achieve simple structure, convenient maintenance, cost saving, no burrs on the cutting edge, and can be used in engineering molds or connected with the previous process in continuous molds. It completely solves the problems of needing to add new equipment, high design and maintenance difficulty, high cost, and large cutting edge burrs. Attached Figure Description

[0017] Figure 1 This is the main view of the flangeless edge-cutting structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the flangeless edge-cutting structure of this utility model;

[0019] Figure 3 This is a front view of the punch of this utility model;

[0020] Figure 4 This is a front view of the guiding punch of this utility model;

[0021] Figure 5 This is a front view of the concave mold structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the product before punching.

[0023] Figure 7 This is the main view of the product after punching. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Example 1:

[0026] Please see Figure 1-7 This utility model provides a technical solution:

[0027] A flangeless cutting edge punching structure includes, from top to bottom, a punch 6, a guiding and core-setting punch 5, and a die structure 8. The bottom end of the punch 6 is provided with a punch cutting edge 18 to ensure that the punching surface of the product is flat. Therefore, the shape of the punch cutting edge 18 is flat. The bottom end of the guiding and core-setting punch 5 is provided with a straight section feature 17, and the bottom end of the straight section feature 17 is provided with a guiding feature 14. The guiding feature 14 is tapered and used for guiding during processing. The bottom end of the die structure 8 is provided with a blanking structure 16 to facilitate the product falling. At the same time, the inner circle of the top end of the die structure 8 is provided with a cutting edge structure 19, and one side of the cutting edge structure 19 is an upper inclined surface support 20.

[0028] To facilitate connection, a screw hole 24 for connecting with the mold is provided at the top of the guiding and centering punch 5.

[0029] Working principle:

[0030] The blanking surface 23 of the product is flat, avoiding the risk of scratching the collection personnel during product collection. The shape of the punch cutting edge 18 is flat, avoiding the risk of easy damage to the cutting edge, chipping of the cutting edge, and scratches during assembly. The die structure 8 is divided into an upper inclined support 20, a cutting edge structure 19, and a blanking structure 16, which not only meets the product cutting edge blanking but also reduces the contact area with the product, reducing the risk of product scratches and facilitating blanking. The guiding and centering punch 5 is divided into a guiding feature 14, a connecting screw hole 24, and a straight section feature 17. The tapered guiding feature can greatly reduce the risk of crushing the product, and the use of screws to connect the flangeless cutting edge blanking structure and the mold of this utility model is more convenient and easier to maintain.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flangeless edge-cutting structure, comprising, from top to bottom, a punch (6), a guiding and centering punch (5), and a die structure (8), characterized in that: The bottom end of the punch (6) is provided with a punch cutting edge (18) to ensure that the punching surface of the product is flat; The bottom end of the guiding and centering punch (5) is provided with a straight section feature (17), and the bottom end of the straight section feature (17) is provided with a guiding feature (14); The die structure (8) has a blanking structure (16) at the bottom inside, and a cutting edge structure (19) is provided on the inner circle of the top of the die structure (8). One side of the cutting edge structure (19) is an upper inclined surface support (20).

2. The flangeless edge-cutting structure according to claim 1, characterized in that: The shape of the punch cutting edge (18) is planar.

3. The flangeless edge-cutting structure according to claim 1, characterized in that: The top of the guiding and centering punch (5) is provided with a screw hole (24) for connecting with the mold.

4. The flangeless edge-cutting structure according to claim 1, characterized in that: The guiding feature (14) has a taper.

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