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In metal stamping processing, we attach great importance to improving production efficiency. We understand the importance of the metal stamping process, so at every step of the fine processing, committed to providing customers with customized high quality solutions.

In order to ensure the accuracy and consistency of our products, we use advanced automation equipment and precision molds. At the same time, we continuously optimize the process and improve the production process to achieve the goal of increasing efficiency and reducing costs. Through technological innovation and continuous improvement of quality management, we provide our customers with excellent products and services.

In the future, we will continue to be committed to the research and application of metal stamping process, and constantly improve the technical level to meet the increasing needs of customers. We believe that with our professional ability and efforts, we will win the trust and support of more customers. Thank you for choosing Wenzhou, let us create a better future together!

Production steps of metal stamping

cast

Die casting, often referred to as metal casting, is a high-precision manufacturing process in which the metal is subjected to high levels of pressure by pushing the mold through mechanical forces. This process allows the material to produce plastic flow, resulting in a smoother surface and edge of the workpiece, close to the design accuracy requirements.

Remove excess

Punching, a common cutting process, usually transforms large sheets of metal into smaller shapes. After punching and cutting, the workpiece is easier for subsequent bending and machining. During the punching and shearing process, the machine may make multiple cuts to the metal with high-speed molds, or use specially shaped molds to cut.

Bend and shape

Bending is usually the last step in the die stamping process. The grain orientation of the material is critical when it comes to bending characteristics. When the grain of the material is consistent with the bending direction, cracks are easy to occur, especially on high-strength materials such as stainless steel alloys or tempered materials. Designers should bend according to the texture direction of the material in order to obtain the best results, and note the texture direction on the drawing.

punching

The process uses pressure to push the punch through the metal, leaving precisely shaped holes. The stamping tool will usually completely separate the excess material from the newly created shape. Drilling can be done with or without shear.

knurling

Embossing is the process of creating a raised pattern or design on a stamped workpiece to increase the tactile effect. The workpiece is usually placed between the Yin and Yang dies so that a particular line forms a new shape.

In metal stamping technology, holes and slots are important processes for the manufacture of metal materials by stamping tools. In this process, the punch will press a metal sheet or strip onto the mold, and then the processing will begin, and the material will be cut and pressed out. The result is a hole with a smooth wall that gradually tightens at the bottom and leaves burrs where the material falls off. Due to process characteristics, the holes and slots may not be completely vertical, but a uniform wall can be achieved through secondary machining; But that may come with some additional costs.

The importance of bending radius

Sometimes, the workpiece needs to be bent to meet the functional requirements of the product, but it is important to note that the material should generally be bent in one direction, and the internal bending radius should be at least equal to the thickness of the plate.

Characteristics and requirements of metallic materials

Different metals and alloys have different properties, including resistance to bending, strength, formability and weight. Some metals respond better to design specifications; But it requires a certain amount of professionalism on the part of the designer. We have a team of professionals who consider the pros and cons of choosing metals.

Determination of tolerance

Before the project begins, our team of designers will work with you to determine acceptable tolerances. Achievable tolerances vary depending on the type of metal, design requirements and machining tools.

Wall thickness control

The thickness of the product is a key factor that is easily overlooked in metal stamping technology, and usually the walls of the entire product should be consistent. If different parts of the part have walls of different thicknesses, this can lead to different bending effects, resulting in problems of deformation or exceeding project tolerances.

Some potential risks and ways to avoid them

Metal pressed products may have some common problems:

Sharp burrs remain

Improper clearance between the die and the punch during the pressing process can result in sharp burrs or additional metal curling on the edges of the product. A second burr removal procedure is required. To avoid this, the clearance can be controlled by finely grinding the dies and punches.

Break and bend

For those parts that need to be severely bent, especially those made of metals with higher hardness, cracks are prone to occur. If the bending direction is parallel to the direction of the metal grain, long cracks may appear.

Waste accumulation

Due to mold wear, defects, or inaccurate alignment, too much metal remains between parts along the cut edge. Once this problem occurs, the tool can be re-aligned, trimmed or replaced, and the gap between the punch and the die can be appropriately increased.

Elastic rebound

Partially released stress may cause the press to spring back slightly after removal. You can try hyperbending or use bending compensation to solve this problem.

Choose the precision metal pressing service provided by Wenzhou manufacturer

Ningbo Wenzhou is committed to providing high quality manufacturing services, from fast quotation, production of high quality and affordable products to on-time delivery. Our engineering and production teams have the experience and skills to meet your various project needs at a reasonable cost. Welcome to contact us!