The deep draw process itself begins once a flat piece of metal – referred to as a blank or a disc – is placed over a cavity known as a die. A punch pushes the metal through the die to form it into the specific shape required by the design. Deep drawn metal stamping has a wide range of applications across myriad industries, so an understanding of how the process works can benefit many different types of industrial stakeholders.
Top Five Things to Know for Deep Draw Metal Stamping
Deep drawn metal stamping – or simply deep drawing – requires a specific skillset and experience to accomplish correctly. Our resident expert Farley Fitzpatrick, compiled the following five tips for deep draw metal stamping.
- Cold Metal Drawing
Cold metal drawing processes will provide you with a greater peace of mind. Cold processes are able to provide finished products with a greater accuracy. Cold metal drawing also offers better grain structures and surface finishes in the final product. While more expensive, cold drawing results in a blanket, overall improvement of the metal’s properties when compared to other methods.
- Corner Radii
To determine the smallest corner radius that you can obtain, there’s a general rule you can follow: The smallest attainable corner radius is equal to the material thickness times two. Working additional draw operations into your process can help you skirt this rule a little if you need to further reduce corner radii. For many designs, larger corner radii may be considered desirable. These may also reduce the amount of draws necessary.
A small amount of draft is absolutely necessary to the drawing process. The draft allows the case to be stripped off of the punch after draw operations are completed. This makes for a container that’s smaller on one side and larger on the other—the closed end inside will be smaller and the open end inside will be larger. Our standard draft is 0.001″ (0.025mm) per inch of length.
- Work Hardening
Cold working of the metal during the deep draw process (also known as work hardening) must be relaxed through a heat treat process. This second process is known as annealing. It’s an intermediate step that takes place during the forming and case reduction sequence.
Specifically designed tooling can intentionally thin out (or iron) the sidewalls beyond the material’s natural tendencies. This method will only be used to address particular requirements and occurs on a project-by-project basis. This process can add greater dimensional stability to the case while also making it more aesthetically pleasing.
The deep drawing process is crucial to the fabrication of items that many of us use every day, such as pots and pans, automobile parts, and containers. Since deep drawing plays such a central role in getting so many objects made, it’s key for those involved in the process to understand it thoroughly.
Good medical devices must satisfy three categories: they achieve tight tolerances, healthcare professionals can easily use them, and they help the patient heal. High-quality equipment and tooling ensure high-quality end parts for medical applications ranging from device pumps and motors to pacemakers, defibrillators, and surgical equipment.
Hudson Technologies provides industry-leading custom metal stamping for a wide range of medical applications. Founded in 1940, we perform precision metal stamping using state-of-the-art equipment, creating high-tolerance parts in large production volumes.
Applications in the Medical Industry
Hudson creates a number of products for the medical industry. A couple of our most notable offerings include:
All permanently implanted medical devices, including pacemakers, cochlear devices, internal defibrillators, and drug pumps, are manufactured from titanium. Titanium is the only metal that the human body will not reject. Hudson has a long history of deep-drawing titanium into intricate shapes and has been manufacturing implantable titanium medical components since the early 1970s.
Implantable components include the outer shield of the device, battery cases, and other components. By designing and building custom tooling, Hudson uses their metal stamping to affordably and quickly manufacture components for a variety of purposes.
Benefits of Metal Stamping Over Other Metal Fabrication Processes
Metal stamping comes with a host of benefits that set it above other metal fabrication processes. Manufacturers can easily automate the metal stamping process, making it a great method for mass producing parts. These mass production capabilities also make it more cost effective for large-volume orders—after paying the initial setup costs, each individual product over a certain volume does not contribute that much to your overhead. Furthermore, it’s much easier to repeat processes and duplicate components with stamping than with other fabrication techniques.
The Hudson Difference
We design all our tooling in-house to optimize the production process. Our highly trained staff operates over 130 forming presses around the clock, working with mechanical and hydraulic presses ranging from 1 to 500 tons. We also use a servo press with a CNC lower cushion for special orders.
We draw our designs with reliability and manufacturability in mind, aiming to achieve the most affordable solutions through collaborative relationships with our customers. We also offer extensive modification capabilities, which allows for greater component customization. We perform in-house heat treatment as well as hydrogen and vacuum annealing to minimize lead times and optimize quality control.
To find out how our custom precision stamping services will benefit your next project, contact us today.
Over the years, Hudson Technologies has established itself as a leading supplier of metal shaping services for clients across the U.S. We provide top-quality engineering services and technical support for all kinds of metal fabrication needs, whether we’re deep-draw forming aluminum alloys for aerospace manufacturers or we’re stamping titanium parts for medical devices.
We’ve worked with many partners in industries and applications as varied as:
- Semiconductor manufacturing
- Active and implantable medical device manufacturing
We’re Growing Quickly
Hudson recently partnered with Thomas For Industry to develop a new website suitable for the needs of 2019. Our new site will provide a comprehensive overview of all our products and services, and we also aim to make it a resource for industry professionals seeking new insights in the metalworking field. With Thomas, we hope to continue building our reputation as industry-leading experts of metal stamping services in the United States.
We’re also expanding our employment options as the economy continues to grow. Over the last few years, we’ve increased the size of our team by over 30% to keep up with demand. With all the new faces around our company, we’re excited to further develop our family of highly experienced metal stampers.
We’re generating new leads every day, with customers around the world drawing on our expertise for their metal fabrication needs. With our updated website and the expanded production capacity enabled by our new team members, we’ve broken sales records and have signed new clients worth in excess of $1.5 million.
A Future of Success at Hudson Technologies
We’re looking forward to continue growing as 2019 progresses. Hudson has expanded exponentially since its founding, and we’re excited to see where we’ll go next.
If you and your organization are seeking innovative metal stamping or hydraulic pressing solutions, don’t hesitate to contact us and request a free quote today.