TPT September 2021

Given the ever-changing requirements expected of pipe performance, the ability to prove the efficacy of a thread cutting fluid for the actual application is essential. While it is difficult to reproduce the thread-cutting operation under laboratory conditions, our state-of-the-art in-house machining laboratory facilities allow us, using thread cutting and cut tapping machining test methods, to measure a fluid’s performance – and thereby to assess its capabilities for use in pipe threading applications. In such machining tests, the performance and the effectiveness of the metalworking fluid in the operation are assessed by measurement of the cutting power, tool wear and the quality of the threads produced. While these parameters are clearly interrelated, they each alone provide useful information on the performance properties of a fluid, and also can provide an effective means for differentiating between two or more closely performing fluids. While selection of the optimum fluid for a given thread cutting operation is a critical first step, it is equally important to maintain effective and consistent performance of the fluid over long extended periods of use, as well as to over time, implement system changes to further optimise the process. That’s why we see a significant future in the use of data software, to assess and refine the optimum combination of cutting fluid and application. For example, Quaker Houghton’s QH FLUIDTREND™ digital software system provides the real- time, data-driven insights needed to increase productivity, reduce operating costs, improve tool quality and life, reduce machine downtime and reduce fluid usage. By harnessing a holistic, intelligent approach, manufacturers can effectively manage and control fluid performance for any given thread cutting operation. An integrated solution Thread cutting is only one aspect of creating the perfect tube or pipe – but it is one that Quaker Houghton considers against the backdrop of the entire OCTG production process. Our thread cutting fluids, backed by expert advice and technical support, are part of our comprehensive ‘front to back’ offering. Using this platform, we can assist in the entire tube and pipe production process – everything from casting, forming and finishing, to coatings – while taking into consideration maximum productivity and ensuring process and chemical compatibility. Our commitment to ‘front to back’ solutions reflects the certainty that the demands on tube & pipe manufacturers to improve efficiency and performance will continue to increase. Understanding the capabilities of thread cutting fluids, and the role they can play in this process, is a sure- fire way of anticipating – and solving – the challenges to come. By working with a partner such as Quaker Houghton, who can take an integrated approach to fluid selection and management based on testing, data and the specifics of each application, manufacturers can confidently deal with whatever comes next.

While water-based fluids offer significant utility in machining operations, they can also present challenges, including the potential for microbiological growth, as well as the need for large fluid sump systems to recirculate, clean and filter the fluid. While both straight oil and water-based fluids are often delivered using a flooded application method, the use of an application of a minimum quantity of lubricant, MQL (often a straight oil, but can be water based) seeks to deliver equivalent performance results in a more cost-effective manner. However, while use of MQL has gained acceptance in certain sectors and operations in industry, there are potential issues related to heat generation and thermal distortions, airborne metal dust generation and repeatability that must be considered and handled. In other words, there is a wide choice of thread cutting fluid solutions – and Quaker Houghton offers formulations across this spectrum. The challenge is to identify exactly where each application sits. And that involves looking beyond simply the fluids themselves. Considering the whole process When selecting the right cutting fluid, a variety of factors need to be considered. The material and mechanical properties of the material being cut, the machining conditions, cutting speeds and feed rates used, the properties of the cutting inserts and coatings, as well as the required finished part specifications to be achieved, all drive and influence the type and selection of the fluid for use. In addition, other process factors can influence the fluid of choice. These include sump size, recirculation times, fluid sheer rates during recirculation, typical tramp oil levels in the system, as well as certain operational objectives of the manufacturer, which may include minimising part cleaning required, reduce corrosion, or increase productivity by use of higher cutting speeds and feed rates. Selecting the right lubricant can balance all of these factors and drive the performance and quality required. It’s just that achieving this balance can present a significant challenge – one is only likely to increase as higher strength materials are developed and used, and as machining processes continue to increase in severity to enable for increased part output and productivity. In other words, the selection of the best fluid for use requires a good understanding of all of the system factors which exist and how they influence and interact. Choosing the right thread cutting fluid Quaker Houghton’s highly experienced tube & pipe experts will work closely with your team to solve complex manufacturing challenges for seamless and welded operations. This consultative approach includes extensive service and technical support in the field, wherever you are – we offer full responsiveness with global support for tube & pipe customers. When it comes to choosing the right fluid, we have the capabilities to offer and often develop new fluids for different levels of threading. offers products for different levels of threading. Depending on the challenge and complexity of the threading process, the multiple solutions within our QUAKERCOOL ® 700 series platform can help extend tool life and, in turn, minimise tool and insert wear costs.

Reference: Issues Associated With MQL Implementation: Effect on Peripheral Milling Process Performance and Impact on Machining Economics | IMECE | ASME Digital Collection

Quaker Houghton – USA www.quakerhoughton.com

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TUBE PRODUCTS INTERNATIONAL September 2021

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