Only stamping parts that pass certain inspection standards can enter the market for consumers to use. The reliability of finished products that meet the inspection standards will be guaranteed with a high probability. What are the Inspection standards for precision metal stampings produced by high-precision and high-speed punch presses? This issue is analyzed from the perspectives of tolerance range, chemical and physical properties, surface quality, hygiene and environmental protection.
It is hoped that the quality of the product will be improved. The analysis of the standards has a certain guiding significance. The Inspection standards for precision metal stampings produced by high-precision and high-speed punch presses are introduced in four aspects.
1. Tolerance range inspection
There is generally a certain deviation range between the size of stamping parts and the design size. By inspecting the tolerance, we can objectively and accurately know the fluctuation range of the value, so as to know the accuracy of the stamping parts. There are many types of tolerance values that need to be inspected, such as stamping part size tolerance, stamping part forming angle tolerance, stamping part repeatability tolerance, stamping part shape and position tolerance, shape and texture, stamping part aperture size tolerance, etc. For example, the size tolerance required for some stamping parts is between 0.04mm and 0.15mm, which requires us to use the "three-coordinate measurement method" to measure these values and record them, and finally count and inspect the tolerance range of stamping parts.
2. Chemical and physical properties inspection
The inspection contents of these properties generally include the hardness, strength (strength inspection mainly includes tensile strength and yield strength, impact strength, bending strength), elongation, air tightness, mechanical properties, adhesion of surface coating, corrosion resistance, whether the surface and interior of stamping parts are corroded or rusted, etc. Because the raw materials of general hardware stamping parts are all metal, metal may undergo certain chemical reactions with the surrounding medium at room temperature, and oxygen and other electrolytes affect the stability of stamping parts. The good impact strength and elongation of stamping parts are not only conducive to processing, but also of great significance to the performance of finished products. Many stamping parts cannot play their functional value without these physical properties. In addition, the inspection of these properties is also of reference value for adjusting the strain and stress in the stamping process, as well as deformation and other parameters.
3. Surface inspection coordinates assembly performance
Surface inspection includes inspection of burrs, cracks, sand holes, finish, scratches (impact and scratches, friction, etc., traces or uneven convexities and concave depressions), creases, etc. The high flatness of the stamping surface can make the product look beautiful and the assembly performance reliable. Once the stamping part is found to have serious concave and convex phenomena, it can be intuitively seen that the stamping part is not suitable for assembly. Generally, the requirements for components of precision metal stamping parts are relatively high, otherwise it is very likely that they cannot be assembled together. In the production of hardware shrapnel, Mouse switch shrapnel Smart socket pin shrapnel Button switch contact shrapnel Toy spring piece plug-in High-speed punch press production line, stamping metal shrapnel is prone to gaps that cause the workpiece to twist or dent.
4. Hygiene and environmental protection inspection
Unknown oil and stains adhere to the surface of stamping parts, causing pollution to stamping parts. Unclean products are easy to give users, that is, consumers, a bad experience, and will also affect the functional value of stamping parts themselves. Society is very concerned about environmental issues. Some producers have certain requirements for the environmental protection of raw materials. Green environmentally friendly materials have also become a trend to pursue. Sustainable and reused and reasonable waste treatment and reuse can make certain contributions to environmental protection. Medical mask aluminum nose bridge N95 mask accessories medical equipment metal accessories high speed punch press production line, the production of disposable masks is usually accompanied by pollution, and mask accessories can be recycled to reduce pollution.
The quality of stamping parts has always been a key concern of producers. After understanding the Inspection standards for precision metal stampings produced by high-precision and high-speed punch presses, what methods should we use to inspect them? What kind of inspection method is more effective? The importance of inspection cannot be ignored.
