At Vista Industrial Products, we always fabricate to print. If a part cannot be fabricated to print, we note deviations during the quote process and list them as exceptions and or conditions on the quote letter. This means we can fabricate to print with some approval of these exceptions; otherwise, we will no bid. These exceptions are also known as deviations after approval. We review prints thoroughly by confirming all materials are available. This includes material types, hardware and finishes to keep things simple. This is basic information has to be defined to allow for any company to quote.
A common mistake is calling out the correct material type. For a Formed Aluminum Sheet Metal Part, an example of this mistake is calling 6061-T6 as the material type. This material will always crack and some engineers do not know this. We would by default deviate from this material and provide the following exception.
“Quoting this part using Al 5052-H32.”
Before learning how to read a manufacturing drawing, be sure you know the different parts of a print. Once there is an understanding of the different components of a print and where everything is located, the next step is to be able to read the lines on a print. Reading a print means to understand what the graphic of a part is showing. Therefore, you must understand how lines work on a print. For engineers and manufacturers, lines are their communicators or even their alphabet which convey information. Below is a chart of the various lines that are used on a print and their descriptions. Continue reading
When learning how to read a manufacturing drawing, it can seem quite daunting because there is so much information to take in. This blog post will break down a drawing and make it easier to understand. But, first thing is first! What is the purpose of a manufacturing drawing if there are 3D models? Manufacturing drawings show numerous features of a part that a 3D model doesn’t. For instance, drawings show the material type, the finish, dimensions, hardware, company information, and other specific requirements. The sole purpose of a drawing is to show all the details of a part. Imagine if you were looking at a single part in your hand, a drawing would essentially describe and illustrate all the details of how to place the part in your hand.
Sheet Metal Part Drawing
Machined Part Drawing
We received a request from a reader that wanted us to touch base on two very common sheet metal drawing mistakes. So we have created this blog post to strictly focus on these issues. When it comes to mechanical engineering and actual sheet metal fabrication, there are a couple grey areas that engineers should know about if they have never fabricated sheet metal. One has to deal with flat patterns and the other is sheet metal bend deductions. Continue reading
Whether you are learning about engineering, manufacturing, or just need to brush up on your knowledge of dimensional prints, how to read a manufacturing prints is absolutely critical when it comes to fabricating a part. So to start with the basics, let’s ask the question, why do you need prints or drawings to manufacture a part? The sole purpose of prints is for visualization. It’s very difficult to have words explain what is required for a part. For example, if someone said “I want to make a 3 x 2 x 2 rectangle with one corner cut off of the rectangle and a hole through the center,” you would have many questions just based on this short description which seems like it should be fairly easy to understand. However, this description doesn’t describe the angle of the “cut off corner” and the exact location and size of the hole. The fabricator has to be able to fully visualize what the part needs to look like. In addition, drawings act as manufacturing instructions which include the dimensions, material type, and finish of the part. Prints are also used for verification once the part has been fabricated. The manufacturer will check the dimensions which should match perfectly with the print. Continue reading