We all know that the stamping process for sofa legs involves using a press machine and molds to forge the material through stamping, which is a processing method characterized by its convenience, high precision, and ease of mechanization and automation. It is currently the most widely used processing method. So, what are the basic requirements for the craftsmanship of sofa leg stamping parts? Let me explain:

1. The material used for sofa leg stamping parts should not only meet the technical requirements of the product design but also the requirements of the stamping process and post-stamping processing (such as machining, electroplating, welding, etc.).

2. When designing the shape of the part, it is best to adopt a structure with simple and reasonable surfaces (such as flat surfaces, cylindrical surfaces, helical surfaces) and their combinations, while also minimizing the number of processing surfaces and the area to be processed.

3. Choose a reasonable method for rough preparation in mechanical manufacturing, which can directly utilize profiles, castings, forgings, stampings, and weldings. The choice of rough depends on specific production technical conditions, generally determined by production volume, material properties, and process possibilities.

4. The requirements for the formability of sofa leg stamping parts. For forming processes, to facilitate stamping deformation and improve the quality of the parts, the material should have good plasticity, a low yield strength ratio, a large thickness directionality coefficient, a small plane directionality coefficient, and a small ratio of yield strength to elastic modulus. For separation processes, the material does not need to have very good plasticity, but it should have a certain degree of plasticity; the better the plasticity of the material, the less likely it is to separate.

5. Specify appropriate manufacturing tolerances and surface roughness for part processing costs. The processing cost of sofa leg stamping parts will increase with the improvement of precision, especially when the precision is high, this increase is very significant. Therefore, without sufficient basis, one should not pursue high precision. Similarly, the surface roughness of sofa leg stamping parts should also be appropriately specified according to the actual needs of the mating surfaces.

The processing technology of sofa leg stamping parts is relatively complex, and the stamping process can be divided into two major categories: separation processes and forming processes. The purpose of forming processes is to cause plastic deformation of the sheet material under non-rupture conditions to produce workpieces with the required shape and size.

Separation processes, also known as blanking, aim to separate the stamping parts along a certain contour line from the sheet material while ensuring the quality requirements of the separation surface. In actual production, multiple processes are often applied to a single workpiece. Blanking, bending, shearing, deep drawing, bulging, spinning, and correction are several main stamping processes.

1. Design the process drawings of the workpieces
Design and draw the three parts of the hardware workpieces, which serve to express the structure of the sheet metal parts through drawing. Draw the development of the workpiece, which is to unfold complex parts into flat parts. Analyze the part drawing to quickly understand the workpiece dimensions, coordinate points, lines, curves, and the positional relationships of cutting surfaces, determine the workpiece coordinate origin, and calculate the coordinates of each vertex and the connection points of the curves.

2. Correct process method
The selection of the workpiece surface processing method is to choose a reasonable processing method for each surface with quality requirements. Generally, the final processing method is selected according to the requirements of surface accuracy and roughness, and the processing method for the preparation process before fine processing is determined, that is, the processing scheme is determined.

3. Choose an efficient cutting method
The bottom of the shears is the length and width of the shear shape. If there are punching angles and cutting angles, combine the punching hole with the mold punching hole to form a cutting angle. The bottom of the stamping press is a flat sheet structure used to wash the parts after one or several steps of unfolding. Its advantage is short working time and high efficiency, commonly used for batch manufacturing. Use programming software to write the expanded drawing into recognizable content for CNC machining equipment. Let it be programmed to cut the structural shape of the sofa leg. Laser finishing is to use laser cutting to cut out the structure of the board shape on a board.

4. Formulate stamping sequence
There are generally processing procedures such as punching angle punching, punching shell, punching tearing, pumping, etc., which require corresponding molds to complete the operation. In addition, bending processes also require a bending bed and corresponding bending molds to complete the operation. The design principle is to prioritize the next operation without interference.

5. Complete the fastening process
Generally, operations are completed through stamping riveting processes or hydraulic riveting machines, with fasteners riveted on sheet metal parts. Pressure riveting is commonly used for pressure riveting bolts, compression riveting nuts, pressure riveting screws, etc. The process of turning the edge of the tap is to dig a slightly larger hole on a smaller bottom hole, and then to suck the tap hole. This can improve its strength and avoid sliding teeth, generally used for workpieces with higher thickness of thin plates, when the plate thickness is larger, it is not necessary to directly turn the edge of the tap.

6. Part assembly method
Welding combines multiple parts for processing purposes or a single part seam to increase its strength. Surface treatment usually has a phosphate film, multi-color zinc plating, chromate, baking paint, oxidation, etc. The specific choice of surface treatment method is based on demand. Assembly is to assemble multiple parts or assemblies in a way that makes them a complete project.