Balford has passed ISO9001 in 2017. We has over ten years experience on manufacturing motor housing, solenoid valve housing and sensor housing, focused on auto parts.Now Balford enter into solenoid valve housings and sensor housings industry that are mainly based on difficult deep drawing process.
We employ documented procedures for every step in the manufacturing process from initial program launch through steady-state production in order to ensure consistent performance. We engineer our processes to produce the desired results, monitor those results, and use what we learn to regularly refine our processes as part of our commitment to continuous process and efficiency improvement.
Many of our customers have been with us for 5-8 years or more. Year after year, they experience zero late deliveries and zero returns.
304 stainless steel stamping parts refer to stamping parts made of stainless steel. Commonly used in auto parts, kitchen equipment, bathroom equipment and other industries. However, because its corrosion resistance is not as good as that of chromium-nickel steel, it is often used in the manufacture of corrosion-resistant equipment and pipes. The application of stainless steel stamping parts in my country is currently the most 304 stainless steel (316 L). However, stainless steel stampings also have some disadvantages: for example, the surface is prone to scratches, which affects the appearance and quality; poor toughness; large stress during welding; high surface hardness and poor corrosion resistance after corrosion.
1. Appearance requirements
In the stamping process, the stamping part is mainly composed of an outer circle, an inner circle and an outer circle. The outer circle is also called a stamping part. Its outer circle can be divided into straight edges and concave-convex edges: the outer circle of the outer circle includes concentric circles, inner circles Circle and special-shaped circle: the concave-convex edge includes convex edge, concave-convex, convex-concave transition surface: such parts have high machining accuracy, good surface quality and long service life. However, the edge of the outer circle should not be too sharp, otherwise it will cause accidents such as tool wear, scratches and cracks during stamping. The edge of the concave and convex edge is generally polished with a grinding wheel. Stamping parts of different materials and thicknesses have different requirements: carbon steel generally requires roughness; austenitic stainless steel generally requires smoothness; 304 stainless steel requires higher requirements; stainless steel has good welding performance or other excellent characteristics for welding performance of other materials It also has a great influence; alloy steel and low carbon steel generally have higher requirements. With the advancement of production technology and the development of precision machining technology, metal stamping parts in the stamping process can be divided into: stamping parts (including formed parts), pressure parts (including press parts) and pressure parts (including formed or forged parts) ) three categories.
2. Stamping process
In the manufacturing process, the stamping process has many process parameters like other processes, including the material of the stamping part, the thickness of the stamping part, the thickness tolerance of the stamping part, the punching method of the stamping part, the mold material, the surface quality of the stamping part, etc. . Different specifications of sheet metal and pipe stamping parts have different requirements for stamping process parameters. Generally speaking, the commonly used stamping process parameters are as follows: Material characteristics Stamping process parameters include stamping temperature, pressure and blanking thickness after blanking.
3. Mechanical properties
The mechanical properties of stainless steel materials mainly depend on the corrosion resistance of stainless steel. If the phosphorus content in the steel is high, the corrosion resistance is poor. Therefore, stainless steel with more calcium usually has higher corrosion resistance and resistance to intergranular bonding. Therefore, the anti-intergranular corrosion and intergranular deformation ability of stainless steel with high calcium content is stronger than that of calcium-containing and chromium-free steel. Generally, in austenitic steel, the calcium content is 0.5% to 1%.
4. Surface treatment technology
The use of galvanized technology is an effective measure to prevent oxidation of the stainless steel surface. In order to prevent the galvanized layer from falling off, cracking and peeling, galvanizing and sandblasting must be carried out. In the process of use, in order to achieve the purpose of corrosion resistance, various special types of electroplating treatment must be carried out. If it is made of chromium-nickel steel, when the chromium-nickel content is low, the surface hardness is high, and it has better resistance to acid corrosion; some problems have occurred in the electroplating process: large electroplating unevenness, large roughness, no metal Gloss, etc., need to be improved during processing (such as nickel plating process, surface treatment process, etc.). At present, there are relatively few aluminum-zinc alloys or nickel-based alloys used to make aluminum alloy parts in China, mainly due to the stable chemical properties, good stability and low price of aluminum-zinc alloys. However, it has the disadvantages of not beautiful and high processing cost.