Benefits of Trepanning Machining

In this guide, we explain what trepanning machining is, its advantages over other deep hole drilling methods, and when you should choose it for your manufacturing project.

1.What is Trepanning Machining?

Developed 65 years ago as a method for drilling deep holes in industrial projects, trepanning machining involves the use of a specialized device called a trepanning machining tool that serves two purposes: to remove a solid core from a round bar or stock, or to machine and then separate the outer jacket of a billet.

Trepanning machining is the method of choice when large holes need to be drilled or a large amount of material needs to be removed. Gun drilling or deep hole drilling removes the entire core and converts it into chips or shavings that cannot be reused.

Trepanning machining, on the other hand, does not affect the core, as only the outer edge of the hole perimeter is removed. This means Trepanning machining is a more cost-effective and versatile solution to help drill large holes in a controlled and precise manner.

2.What are the Benefits of Trepanning Machining?

While applications can sometimes be limited due to tooling and wide tolerances, the benefits are enormous when trepanning machining is a viable option.

In this article, we will explore the five main benefits of using trepanning machining tools to machine large holes.

1) Reduced Effort

One of the main advantages of using trepanning machining tools is that they require less energy than other types of drilling methods.

Rather than removing the entire core by chiseling it off, Trepanning machining tools cut out a solid core, which can take less time and effort to achieve the desired hole size, especially when drilling hard materials. This can reduce tool wear and increase productivity.

2) Cost Savings

Trapping tools offer several cost-saving advantages. First, trepanning machining reduces material waste by cutting away the core or scrap, leaving usable cores that can be allocated to other projects or recycled at a higher value than scraps.

In addition, trepanning machining reduces the use of drill heads, drill tips, and tools because the tool only removes the desired cylindrical portion, so it wears less. This means saving on tool costs and reducing the frequency of tool changes.

3) Improved Energy Efficiency and Sustainability

Deep hole drilling and boring are energy-intensive processes, especially when the core of the drilled hole is converted into chips.

However, by using trepanning machining tools, your business can significantly reduce energy costs because cutting solid cylinders is a more efficient method. Improved energy efficiency reduces operating costs and contributes to a more sustainable manufacturing process.

4) Tool Usage Optimization

Trepanning machining tools make the most efficient use of cutting tools. Unlike traditional drilling methods that result in extensive tool wear and degradation, trepanning machining tools require fewer tool changes and replacements.

In addition, by recycling trepanning machining waste and optimizing tool use, you can extend the life of your cutting tools, reduce tool costs, and minimize downtime required for tool changes.

5) Material Utilization

Trepanning machining improves material utilization. By cutting the cylindrical core, trepanning machining tools leave reusable raw material that can be used for other applications. This reduces material waste and maximizes the use of raw materials, resulting in cost savings.

However, please note that by performing trepanning machining, material properties may be altered, and therefore, original material certificates may not be used to use recycled materials for other applications.

3.Advantages of Trepanning Machining over Drilling

Trapping offers several advantages over solid core drilling:

1. Trepanning machining tools can remove the solid core or jacket of a stock in a shorter time than conventional machining methods.

2. Trepanning machining cutters require less energy than drilling cutters because it takes less time to cut a cylinder than drilling because most of the stock does not convert to chips but remains intact.

3. Trepanning machining cutters use indexable tools, which makes them very efficient and productive when processing different jobs in rapid succession.

Trepanning machining is often used to make large diameter holes, often with a depth of more than one hundred times the diameter. Reasons for choosing trepanning machining are usually:

1. Standard boring heads are uneconomical or unavailable

2. The customer specifies that solid core material be returned to maximize scrap value or for reuse. However, if full traceability is required, the stock will need to be recertified and processed because the certificate no longer reflects the description of the material.

3. The hole diameter is usually greater than 100mm

4. Expensive metals such as titanium or super alloys are required

Trenching: The best solution for large diameter holes If your industrial project requires large diameter holes, or you need to reduce costs or recover precious raw materials after drilling, trepanning machining is the most cost-effective and efficient way to achieve excellent results.