Deep Drawing

Deep Drawing is the term we use for the process of giving a piece of sheet metal a three dimensional depth. A flat piece of metal can be deep drawn into a shape that resembles a cup or bowl. We are able to design your part if you only have an idea of a prototype, or bring in your sketched out plans and we will make it happen.

Drawing is very similar to bending and forming in the way that a press/ punch can be used to shape sheet metal. Drawing can be used to punch a hollow cup or cube like shape into sheet metal. The term deep drawing is used to describe a process where the depth of the draw or punch is deeper than the diameter of the drawn metal part. If you are in need of deep drawing or any other metal manufacturing process to design or develop your metal part, the ABT Metals team is here to help. Our engineering team will work with you to create an efficient process that will ensure that you have the metal parts you require in a timely and efficient manner. Whether you have drawings of your part ready to go, or need us to help you design your metal part from the ground up, we look forward to serving you. 

Continue reading below to learn more about the metal drawing process and our capabilities here at ABT Metals. 

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Metal drawing is a metalworking method that involves stretching and forming metal with tensile force. The procedure is generally carried out cold to guarantee precise tolerances, enhanced grain structure and surface polish, and improved material characteristics. To know more about metal drawing, read the article thoroughly.

How is Metal Drawing Done?

The process of shaping metal into a part or component is known as metalworking. Metal drawing, which involves moving a metal through a mold or die, is one of the most frequent metalworking methods. Extrusion is a comparable operation in which metal is pushed through a die using a drawing punch.

Metal drawing can produce a metal with a depth that is equal to or greater than the width or radius of the metal. This type of metal drawing, also known as deep drawing, can generate high-strength, low-weight goods while saving a lot of money, making it an attractive alternative for many manufacturers.

Hot vs. cold metal drawing?

Cold Metal Drawing

A piece of metal is formed at room temperature during cold metal drawing. It can be heated to a few degrees, but generally, the metal can only be heated to a moderate temperature. There are two methods of doing this: Stamping and Hydroforming.

Hot Metal Drawing

A hot Drawing press resembles an oven in that it surrounds a die that is placed inside a box. To hit on the die, the oven must be heated to 2000 degrees, which can take up to an hour. The material is then squeezed between the male and female die parts. The portion is cooled after the initial push. Hot drawing can create two pieces per hour, making it perfect for tiny, specific orders made of materials that cannot be cold formed. Grade 5 6Al-4V titanium, for example, cannot be cold-formed. Hence hot drawing is an option.

Metal drawing process

Metal drawing is usually done cold, meaning the metal to be shaped kept at room temperature rather than being heated. A cold metal drawing method assures that the tolerances of the drawn product are more accurate, that the grain structure, that the surface finishes are better, and that the product’s qualities are improved overall.

The blank is placed into the die during metal drawing and mechanically grasped to pull it through. The workpiece will take on the shape of a hollow box or cylindrical vessel as it passes through the die. Depending on the form of the die, the sides might be straight, tapered, curved, or a mix of all three. The workpiece can then be pulled through the second set of dies to decrease the diameter and length of the workpiece while keeping the thickness of the walls relatively unchanged.

What is Deep Drawing Metal?

Deep drawing is a sheet metal shaping technique that uses the mechanical action of a punch. A flexible rubber diaphragm is used to manufacture a flat sheet metal blank over a single, rigid shape-defining tool under uniform hydrostatic pressure.

Regardless of the sheet thickness of tool complexity, including undercuts, the technique produces scratch-free products. High forming pressure ensures close tolerance pieces right out of the press, requiring little or no further handwork.

When the deep of the drawn part is exceeds its diameter, the procedure is deemed deep. This is accomplished by the use of a series of dies to redraw the part.

The material retention property causes radial drawing stress and tangential compressive stress in the flange region, which is the sheet metal in the die shoulder area.

Flange wrinkles are caused by compressive stresses, also known as hoop stresses. The use of a blank holder, whose purpose is to permit controlled material flow into the die radius, can help prevent wrinkles.

What type of metal is used in deep drawing?

There are various metals, each with its own set of strengths and applications.

Stainless Steel

Stainless steel is a versatile material that resists corrosion, high temperatures, and low temperatures while still providing great strength, a pleasing aesthetic, and ease of manufacture. Worked with stainless steel grades 350, 316L, 304L at Hudson Technologies.

Inconel

Inconel is a nickel-based alloy available in grades 625 and 718 from Hudson. It has strong high-temperature resistance, consistent corrosion resistance, and good drawing qualities.

242 Haynes

Haynes 242, a nickel-based alloy with high molybdenum and tungsten content, is another nickel-based alloy. It is certified for ASME Vessel Code construction and has strong drawing qualities and heat resistance. In the gas turbine and aerospace industries, Haynes 242 is one of the most regularly utilized materials.

What is the difference between drawing and deep drawing?

Here are some of the differences mentioned below to distinguish between Drawing and Deep Drawing.

Drawing

Drawing is a metalworking method that involves stretching (elongating) metal, glass, or plastic with tensile pressures. The metal stretches as it is drawn (pulled) in order to produce the proper form and thickness. Sheet metal drawing and wire, bar, and drawing are the two types of drawing. Plastic deformation along a curved axis is defined as sheet metal drawing. The beginning stock is drawn through a die to lower its diameter and increase its length in wire, bar, and tube drawing. Drawing is often done at room temperature, making it a cool working procedure. However, massive wires, rods, and hollow sections can be hot worked at higher temperatures.

Deep Drawing

Deep drawing is a metal forming method in which a sheet metal blank is mechanically pulled radially into a forming die. As a result, it’s a material-retention shape modification process. When the deep of the drawn part exceeds its diameter, the procedure is called “deep” drawing. This is accomplished by the use of a series of dies to redraw the part. Due to the material retention property, the flange region (sheet metal in the die shoulder area) experiences radial drawing stress and tangential compressive stress. Flange wrinkles are caused by compressive stresses (hoop stresses) (wrinkles of the first order). The use of a blank holder, whose purpose is to permit controlled material flow into the die radius, can help to avoid wrinkles.

Drawing is a metalworking technique, whereas Deep Drawing is the sheet metal forming technique is the major difference between them.

Metal Deep Drawing Service at ABT Metals

If you need sheet metal drawn or punched into a complex hollow shape, ABT Metals can help you. Our engineers will ensure that the material is suitable for deep drawing and will not create any problems relating to quality down the road. We want to ensure that each and every metal part/ piece we produce will stand the test of time. In addition to determining which materials will be suitable for creating your part, our engineers will develop a deep draw process that will efficiently produce your desired metal part or metal piece. When you work with ABT Metals you will enjoy short lead times as well as high quality yet cost effective production for all of your metal part needs. Our equipment allows us to draw metal into the custom shapes that you require.

Our Metal Deep Drawing Equipment 

The equipment that we use to draw metal into the required shape is state of the art and produces consistent, high quality results. We have up to 250 ton capability in our draw presses and press bed size of 39 inches square. We offer single draw, draw/reverse draw and draw/reverse/reduce draw capability with our equipment. We can take your idea from the drawing board to the shop floor and produce a high quality product that maintains your tolerance requirements part after part.

ABT Metals Deep Drawing Services

Whether you are looking for a batch of pieces that require a deep draw or are interested in full scale production of your metal piece, the friendly team here at ABT Metals is here to help. We offer a comprehensive range of metalworking services ranging from deep drawing and punching to drilling and welding. We can turn your metal part design into a reality or even help you reverse engineer an existing part to put it back onto production. Our engineers will work with you to develop an efficient process that will help reduce lead times and waste which will ultimately save you money on your metal part production costs. If you are interested in a quote for deep drawing, or any other metal manufacturing services, contact ABT Metals today. Give us a call or fill out the online contact form below. One of our friendly team members will be happy to provide you with a custom quote for production of your metal part.

 

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