DIN 6930 M PDF Free Download: What You Need to Know
Introduction
If you are in the sheet metal forming industry, you may have come across the term DIN 6930 M standard. But what is it exactly and why is it important for your work? And more importantly, how can you get it for free?
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What is DIN 6930 M standard?
DIN 6930 M is a German standard that specifies general tolerances for cold or hot stampings made from flat steel products. It covers linear and angular dimensions, coaxiality and symmetry, with four tolerance classes: f (fine), m (medium), g (coarse) and sg (very coarse). It also provides guidelines for general tolerances indicated on existing drawings.
Why is it important for sheet metal forming?
Sheet metal forming is a process that involves cutting, bending, stretching and shaping metal sheets into various parts and products. It is widely used in industries such as automotive, aerospace, construction, electrical and medical. However, sheet metal forming also involves variations and uncertainties that can affect the quality and functionality of the parts. These variations can come from the material properties, the tooling accuracy, the machine performance, the environmental conditions and the human factors.
To ensure that the parts meet the design requirements and the customer expectations, it is essential to apply appropriate tolerances to the dimensions and geometries of the parts. Tolerances are the allowable deviations from the nominal values that define the acceptable range of variation for a dimension or a feature. By using tolerances, you can control the quality of your parts, avoid unnecessary rework or scrap, and reduce costs and production time.
However, specifying tolerances for every dimension or feature on a drawing can be tedious and confusing. That's why using a standard like DIN 6930 M can simplify your work and make it more consistent and efficient. By referring to this standard in your drawings or documents, you can apply general tolerances to your parts without having to indicate them individually. This way, you can save time and space on your drawings, avoid errors or misunderstandings, and communicate clearly with your suppliers or customers.
How to get it for free?
Now that you know what DIN 6930 M standard is and why it is important for sheet metal forming, you may wonder how you can get it for free. After all, standards are usually not cheap and you may not want to spend money on something that you may not use frequently.
Fortunately, there are some ways to get DIN 6930 M standard for free online. One way is to use a search engine like Bing and type in "DIN 6930 M PDF free download" as your query. You may find some websites that offer free downloads of this standard in PDF format. However, be careful when downloading files from unknown sources, as they may contain viruses or malware that can harm your computer or device.
Another way is to use a website like [GlobalSpec](^1^) or [Scribd](^2^) that provide access to standards and technical documents from various sources. You may need to create an account or sign up for a free trial to view or download the files. However, these websites may not have the latest version of the standard or may have limited availability.
A third way is to use a website like [Engineers Edge](^7^) or [Boyan Manufacturing Solutions](^8^) that provide useful information and guidance on sheet metal design, tolerances and processes. You may not find the exact copy of the standard, but you may find some tables or charts that summarize the general tolerances for sheet metal forming according to DIN 6930 M standard. You can use these as a reference or a guide for your work.
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Main body
What are the general tolerances for sheet metal forming?
As mentioned earlier, DIN 6930 M standard specifies general tolerances for cold or hot stampings made from flat steel products. These tolerances apply to linear and angular dimensions, coaxiality and symmetry, and material thickness variations. Let's take a look at each of these aspects in more detail.
Linear and angular dimensions
Linear dimensions are the lengths, widths, heights, diameters, radii, or distances of a part or a feature. Angular dimensions are the angles, slopes, or inclinations of a part or a feature. DIN 6930 M standard provides four tolerance classes for linear and angular dimensions: f (fine), m (medium), g (coarse) and sg (very coarse). The tolerance values depend on the nominal dimension and the tolerance class. The table below shows some examples of linear and angular tolerances according to DIN 6930 M standard.
Nominal dimension
Tolerance class
Tolerance value
Up to 10 mm
f
+/- 0.1 mm
Up to 10 mm
m
+/- 0.2 mm
Up to 10 mm
g
+/- 0.5 mm
Up to 10 mm
sg
+/- 1.0 mm
From 10 to 30 mm
f
+/- 0.2 mm
From 10 to 30 mm
m
+/- 0.3 mm
From 10 to 30 mm
g
+/- 0.8 mm
From 10 to 30 mm
sg
+/- 1.5 mm
Above 30 mm (per each additional 10 mm)
f
+/- 0.05 mm
Above 30 mm (per each additional 10 mm)
m
+/- 0.1 mm
Above 30 mm (per each additional 10 mm)
g
+/- 0.2 mm
Above 30 mm (per each additional 10 mm)
sg+/- 0.5 mm
Up to 10 degrees
f
+/- 0.5 degrees
Up to 10 degrees
m
+/- 1.0 degrees
Up to 10 degrees
g
+/- 2.0 degrees
Up to 10 degrees
sg+/- 4.0 degrees
Above 10 degrees (per each additional 10 degrees)
f+/- 0.2 degrees
Above 10 degrees (per each additional 10 degrees)m+/- 0.5 degrees
Above 10 degrees (per each additional 10 degrees)g+/- 1.0 degrees
Above 10 degrees (per each additional 10 degrees)sg+/- 2.0 degrees
Coaxiality and symmetry
Coaxiality is the condition where two or more features have a common axis or centerline. Symmetry is the condition where two or more features are equally spaced or arranged around a centerline or a plane. DIN 6930 M standard provides four tolerance classes for coaxiality and symmetry: f (fine), m (medium), g (coarse) and sg (very coarse). The tolerance values depend on the nominal dimension and the tolerance class. The table below shows some examples of coaxiality and symmetry tolerances according to DIN 6930 M standard.
Nominal dimensionTolerance class Tolerance value Up to 6 mm f +/- 0.05 mm Up to 6 mm m +/- 0.1 mm Up to 6 mm g +/- 0.2 mm Up to 6 mm sg +/- 0.4 mm From 6 to 30 mm f +/- 0.1 mm From 6 to 30 mm m +/- 0.2 mm From 6 to 30 mm g +/- 0.4 mm From 6 to 30 mm sg +/- 0.8 mm Above 30 mm (per each additional 10 mm) f +/- 0.05 mm Above 30 mm (per each additional 10 mm) m +/- 0.1 mm Above 30 mm (per each additional 10 mm) g +/- 0.2 mm Above 30 mm (per each additional 10 mm) sg +/- 0.4 mm
Material thickness variations
Material thickness variations are the differences between the actual and the nominal thickness of the sheet metal. These variations can result from the manufacturing process, the material properties, or the forming operations. DIN 6930 M standard provides four tolerance classes for material thickness variations: f (fine), m (medium), g (coarse) and sg (very coarse). The tolerance values depend on the nominal thickness and the tolerance class. The table below shows some examples of material thickness tolerances according to DIN 6930 M standard.
Nominal thickness
Tolerance class
Tolerance value
Up to 1 mm
f
+/- 0.05 mm
Up to 1 mm
m
+/- 0.1 mm
Up to 1 mm
g
+/- 0.2 mm
Up to 1 mm
sg+/- 0.4 mm
From 1 to 3 mmf+/- 0.1 mm
From 1 to 3 mmm+/- 0.2 mm
From 1 to 3 mmg+/- 0.4 mm
From 1 to 3 mmsg+/- 0.8 mm
Above 3 mm (per each additional 1 mm)f+/- 0.05 mm
Above 3 mm (per each additional 1 mm)m+/- 0.1 mm
Above 3 mm (per each additional 1 mm)g+/- 0.2 mm
Above 3 mm (per each additional 1 mm)sg+/- 0.4 mm
What are the benefits of using DIN 6930 M standard?
By using DIN 6930 M standard for your sheet metal forming parts, you can enjoy several benefits that can improve your work and your results. Here are some of the main benefits of using this standard:
Simplify drawings and specifications
By referring to DIN 6930 M standard in your drawings or documents, you can apply general tolerances to your parts without having to indicate them individually. This way, you can save time and space on your drawings, avoid errors or misunderstandings, and communicate clearly with your suppliers or customers. You can also use symbols or abbreviations to indicate the tolerance class or the material thickness on your drawings, making them more concise and easy to read.
Improve quality and functionality of parts
By using DIN 6930 M standard, you can ensure that your parts meet the design requirements and the customer expectations. The general tolerances are based on the best practices and the experience of the sheet metal forming industry, and they take into account the variations and uncertainties that can occur during the process. By applying these tolerances, you can control the quality of your parts, avoid unnecessary rework or scrap, and ensure that your parts fit and function properly.
Reduce costs and production time
By using DIN 6930 M standard, you can also reduce costs and production time for your sheet metal forming parts. The general tolerances are designed to be realistic and achievable, and they allow for some flexibility and variation in the process. By using these tolerances, you can avoid over-tolerancing or under-tolerancing your parts, which can lead to higher costs or lower quality. You can also optimize your tooling and machine settings, reduce inspection and testing time, and increase your productivity and efficiency.
Conclusion
DIN 6930 M standard is a German standard that specifies general tolerances for cold or hot stampings made from flat steel products. It covers linear and angular dimensions, coaxiality and symmetry, and material thickness variations. It also provides four tolerance classes: f (fine), m (medium), g (coarse) and sg (very coarse).
DIN 6930 M standard is important for sheet metal forming because it helps to ensure the quality and functionality of the parts, simplify the drawings and specifications, and reduce costs and production time. By using this standard, you can improve your work and your results in the sheet metal forming industry.
If you want to get DIN 6930 M standard for free online, you can use a search engine like Bing or a website like GlobalSpec, Scribd, Engineers Edge or Boyan Manufacturing Solutions. However, be careful when downloading files from unknown sources or using outdated versions of the standard.
We hope that this article has helped you to understand what DIN 6930 M standard is and why it is important for sheet metal forming. If you have any questions or comments, please feel free to contact us.
Summary of key points
DIN 6930 M standard specifies general tolerances for cold or hot stampings made from flat steel products.
DIN 6930 M standard covers linear and angular dimensions, coaxiality and symmetry, and material thickness variations.
DIN 6930 M standard provides four tolerance classes: f (fine), m (medium), g (coarse) and sg (very coarse).
DIN 6930 M standard is important for sheet metal forming because it helps to ensure the quality and functionality of the parts, simplify the drawings and specifications, and reduce costs and production time.
DIN 6930 M standard can be obtained for free online by using a search engine or a website that provides access to standards and technical documents.
Call to action
If you are interested in learning more about DIN 6930 M standard or other standards related to sheet metal forming, you can visit our website or contact us for more information. We are a professional and reliable company that provides high-quality sheet metal forming services and solutions. We have the expertise, the experience, and the equipment to meet your needs and expectations. We can help you with your sheet metal design, fabrication, assembly, testing, and delivery. We can also assist you with choosing the right standards, tolerances, and materials for your parts. We are committed to delivering excellence and satisfaction to our customers.
Don't hesitate to reach out to us today and get a free quote for your sheet metal forming project. We are looking forward to hearing from you and working with you soon.
FAQs
Here are some of the frequently asked questions about DIN 6930 M standard and sheet metal forming:
What is the difference between DIN 6930 M standard and ISO 2768 standard?
DIN 6930 M standard and ISO 2768 standard are both standards that specify general tolerances for linear and angular dimensions, coaxiality and symmetry. However, DIN 6930 M standard is specific for sheet metal forming parts, while ISO 2768 standard is applicable for any kind of metal parts. Also, DIN 6930 M standard has four tolerance classes (f, m, g, sg), while ISO 2768 standard has two tolerance classes (fine and coarse).
What are the advantages of sheet metal forming over other metal fabrication methods?
Sheet metal forming has several advantages over other metal fabrication methods, such as casting, forging, machining, or welding. Some of these advantages are:
Sheet metal forming can produce complex shapes and geometries with high accuracy and precision.
Sheet metal forming can use a variety of materials, such as steel, aluminum, copper, brass, or titanium.
Sheet metal forming can create parts with high strength-to-weight ratio and good mechanical properties.
Sheet metal forming can reduce material waste and scrap by using efficient cutting and bending techniques.
Sheet metal forming can lower production costs and time by using automated machines and tools.
What are the common challenges or problems in sheet metal forming?
Sheet metal forming also has some challenges or problems that need to be addressed or solved. Some of these are:
Sheet metal forming can cause deformation or distortion of the parts due to the applied forces or stresses.
Sheet metal forming can cause defects or flaws in the parts due to the material properties or the tooling quality.
Sheet metal forming can cause variations or uncertainties in the dimensions or geometries of the parts due to the process parameters or the environmental conditions.
Sheet metal forming can require special skills or knowledge to design, fabricate, assemble, test, and deliver the parts.
How can I improve my sheet metal design skills?
If you want to improve your sheet metal design skills, you can follow some tips or suggestions, such as:
Learn the basics of sheet metal design, such as material selection, part geometry, bend radius, bend allowance, hole size, edge distance, corner relief, etc.
Use a software or a tool that can help you with your sheet metal design, such as SolidWorks, AutoCAD, Fusion 360, Inventor, etc.
Follow the best practices and the guidelines for sheet metal design, such as using standard dimensions and tolerances, avoiding sharp edges or corners, minimizing bends or holes, using symmetrical or simple shapes, etc.
Review and revise your sheet metal design, using feedback, testing, or simulation to check for errors, defects, or improvements.
Learn from the experts or the professionals in the sheet metal industry, such as reading books, articles, blogs, or forums, watching videos, podcasts, or webinars, taking courses, workshops, or seminars, etc.
How can I find a reliable and professional sheet metal forming service provider?
If you are looking for a reliable and professional sheet metal forming service provider, you can follow some steps or criteria, such as:
Do some research and compare different options, such as online reviews, ratings, testimonials, portfolios, etc.
Check the qualifications and the credentials of the service provider, such as certifications, accreditations, awards, memberships, etc.
Ask for references and contact previous or current customers to get their feedback and opinions.
Request a quote and evaluate the cost and the value of the service provider, such as pricing, discounts, warranties, guarantees, etc.
Communicate and negotiate with the service provider and establish a clear and mutual agreement on the scope, timeline, quality, and delivery of the project.
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