News Release
What precautions should be taken when designing stretching parts
Precautions for dimensioning on the design drawings of stretched parts: Due to the varying magnitude of stress applied to each part, the material thickness after stretching changes. Generally speaking, the bottom center maintains the original thickness, the material at the bottom corner becomes thinner, the material near the flange at the top becomes thicker, and the material around the corner of the rectangular stretching part becomes thicker.
Standard method for measuring the dimensions of stretched products: When designing stretched products, the dimensions on the product drawing should be clearly indicated to ensure both external and internal dimensions, and internal and external dimensions cannot be marked simultaneously.
The marking method for dimensional tolerance of stretching parts: The inner radius of the concave convex arc of the stretching part and the height dimensional tolerance of the cylindrical stretching part formed in one go are double-sided symmetrical deviations, with a deviation value of half of the absolute value of the precision tolerance of the national standard (GB) level 16, and labeled with ±.
Standard method for measuring the dimensions of stretched products: When designing stretched products, the dimensions on the product drawing should be clearly indicated to ensure both external and internal dimensions, and internal and external dimensions cannot be marked simultaneously.
The marking method for dimensional tolerance of stretching parts: The inner radius of the concave convex arc of the stretching part and the height dimensional tolerance of the cylindrical stretching part formed in one go are double-sided symmetrical deviations, with a deviation value of half of the absolute value of the precision tolerance of the national standard (GB) level 16, and labeled with ±.