There are so many things around us that we ignore, or take for granted. Most are small, seemingly unimportant details that we barely notice. We call them metal deep drawing, stretch forming, or stamping, and we only really notice them when they are damaged or discolored.
If you look around with different eyes, you may start to notice small details. That pen you use most every day, a component of your car’s fuel delivery system, the insulin device that diabetics carry around are examples. You rarely pay attention to them, but the world would be completely different without them.
In fact, all of these items are actually deep-drawn products of metal, made using the same process used to make cup shapes, tubes, grommets, and many other useful everyday items. The deep drawing stamping process is used to create hundreds of different kinds of objects that flood the world around us without us even noticing.
As the name suggests, metal deep-drawn shells are commonly used as lids, plates, containers and other high-visibility applications. Making these products using the deep drawing process makes them more seamless and more complete than most other manufacturing methods, making deep drawing one of the most popular options in many industries.
If you look around, you may find deep-drawn casings found in many industries such as automotive, medical, and appliances. Check out your local hardware store and you’ll see plenty of examples of these products.
Metal deep-drawn products are also reflected in any equipment machine. These machines, and others like them in industries around the world, are actually covered with casings, baffles and small seamless casings for oil or fluids. All of these key components are deep drawn shells.
Like most things, we as people never notice deep drawing products in our lives. After all, that’s what technology is for; to create a better life through modern manufacturing.
Deep drawing Examples
Metal deep drawing (stamping) forming (also known as deep drawing) is a process of stamping metal sheets into hollow cylinders. Deep drawing technology is widely used in production processes, such as car parts; it can also be used to make household products, such as stainless steel kitchen sinks.
Process cost: mold cost (extremely high), single piece cost (medium)
Applications based on deep drawing: food and beverage packaging, tableware and kitchenware, furniture, lamps, transportation, aerospace, etc.
Yield suitable: suitable for mass production
Quality: The precision of the molding surface is extremely high, but the specific reference to the surface quality of the mold
Speed: Fast cycle times per piece, depending on the ductility and compression resistance of the metal
1. The deep drawing process relies on the balance of metal ductility and compression resistance. Suitable metals are: steel, copper, zinc, aluminum alloy, and other metals are easy to tear and wrinkle during the deep drawing process.
2. Because the ductility of metal directly affects the production efficiency and quality of deep drawing, metal flakes are generally used as raw materials for processing.
- 1. The inner diameter of the part formed by deep drawing should be controlled between 5mm-500mm (0.2-16.69in)
- 2. The longitudinal length of deep drawing is at most 5 times the inner diameter of the part section
- 3. The longer the longitudinal length of the part, the thicker the metal sheet, otherwise there will be surface tearing during processing, because the thickness of the metal sheet will gradually decrease during the stretching process
Detailed explanation of the process (video + graphic)
- Step 1: Fix the cut sheet metal on the hydraulic press
- Step 2: The stamping head descends and squeezes the metal sheet into the mold until the metal sheet completely fits the inner wall of the mold.
- Step 3: The punch head rises and the finished part is ejected by the bottom table
Example 1: Manufacturing Process of Metal Thermos Cup Lid (Video)
Example 2: Manufacturing Process of Metal Umbrella Bucket (Graphic)
- Step 1: Cut a 0.8mm (0.031in) thick carbon steel sheet into a round cake shape
- Step 2: Fix the cut carbon steel sheet on the hydraulic press (fixed by the clamps around the hydraulic press platform)
- Step 3: The stamping head slowly descends to extrude the carbon steel sheet into the mold
- Step 4: The stamping head rises, and the formed metal cylinder is ejected
- Step 5: Trimming
- Step 6: Polishing
Example 3: Other deep drawn metal products