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The production process of the nickel steel expanded metal mesh with diamond-shaped holes mainly includes the following steps:

1. **Raw Material Preparation**:

First, select a suitable nickel steel plate as the raw material. The quality of the nickel steel plate is of great importance, and its purity, thickness, and mechanical properties need to meet the corresponding standards and product requirements. Generally speaking, nickel steel plates of different thicknesses will be selected according to the subsequent use and specifications of the product. The common thickness range is between 0.5 mm and 6 mm. At the same time, it is necessary to ensure that the surface of the steel plate is flat and free of obvious defects such as cracks and blowholes.

2. **Punching**:

Place the prepared nickel steel plate on the punching machine. The punching machine is equipped with a mold of a specific shape and size, and the design of the mold is determined according to the specifications of the diamond-shaped holes. Through the pressure of the punching machine, the mold punches a series of regularly arranged long holes on the nickel steel plate. The length, width of these long holes, as well as the spacing between the holes, are processed according to the preset parameters to ensure that the finally formed diamond-shaped holes meet the dimensional accuracy requirements.

3. **Stretching and Forming**:

The nickel steel plate mesh after punching enters the stretching process. The stretching equipment will clamp both ends of the steel plate and then apply a pulling force in a specific direction. Under the action of the pulling force, the material around the punched holes will undergo plastic deformation, and the long holes will gradually be stretched into the shape of diamond-shaped holes. During the stretching process, it is necessary to precisely control the pulling force and speed to ensure that the diamond-shaped holes are of uniform size, the mesh surface is flat, and to avoid problems such as mesh surface tearing or excessive deformation.

4. **Edge Treatment**:

For the nickel steel plate mesh after stretching and forming, there may be some burrs, unevenness, or excess scrap edges at its edges. In order to make the product more regular and safe, the edges need to be treated. Shearing equipment can be used to cut off the excess scrap edges, and then processes such as grinding and polishing are carried out to remove the burrs at the edges, making the edges smooth and flat.

5. **Surface Treatment**:

According to the actual application requirements, the nickel steel expanded metal mesh with diamond-shaped holes may need to be subjected to surface treatment. Common surface treatment methods include electroplating, passivation, painting, etc. Electroplating can form a metal protective layer on the mesh surface to improve its corrosion resistance; passivation treatment can enhance the oxidation resistance of the mesh surface; painting can give the product different colors and appearance effects, and also play a certain protective role.

6. **Quality Inspection**:

After the entire production process is completed, a strict quality inspection should be carried out on the nickel steel expanded metal mesh with diamond-shaped holes. The inspection content includes the dimensional accuracy of the mesh holes, the flatness of the mesh surface, the deviation of the diagonal lines, the surface quality, and the mechanical properties. Only the products that pass the inspection can enter the subsequent packaging and sales process.

7. **Packaging and Warehousing**:

The qualified nickel steel expanded metal mesh with diamond-shaped holes will be packaged according to the customer’s requirements. Generally, packaging materials such as plastic films and cartons will be used to wrap the mesh sheets well to prevent damage during transportation and storage. After packaging, the products will be neatly stacked in the warehouse, waiting for shipment.