Drilling high-precision holes on difficult-to-machines can be challenging. In order to successfully complete drilling of difficult-to-process materials—from large titanium alloy or composite parts in the aviation industry to small Inconel alloy medical devices—has to overcome difficulties including cutting heat, high abrasiveness (such as composites), high hardness (such as hardened steel), and high viscosity (such as austenitic stainless steel). To cope with these problems, a multi-pronged approach must be taken to comprehensively optimize the drill bit in terms of drill tip geometry, edge preparation, matrix grade, tool coating and coolant delivery.

A recent survey conducted in the German metal processing industry shows that drilling is a time-consuming process in the machining workshop. In fact, 36% of all machining hours are consumed in the hole machining operation. Correspondingly, turning processing takes 25% and milling takes 26%.

At present, the processing accuracy requirements for aerospace products are constantly improving, and the overall structural parts in the aerospace field are increasing, and high-precision, thin-walled cavity parts are increasingly widely used in the aerospace product industry. In particular, the quality of the machining accuracy control of parts in servo systems is directly related to the many performance indicator requirements in the weapon system. This type of parts is generally made of titanium alloy blanks, with a material removal rate of up to more than 85%. At the same time, a significant production feature of this type of parts is that it has many varieties, small batches, and even single-piece production. This structural feature and production model determine that its manufacturing technology has always been in an unstable state, and there have always been difficulties such as long processing cycles, high processing costs and difficult processing accuracy to control.

In terms of parts processing, hole processing accounts for a high proportion, and the technological development trends of high-efficiency and high-precision hole processing have also attracted much attention. Recently, due to the rapid development of hole processing technology and products, the use of hole processing tools such as coated carbide drill bits and reamers has increased significantly.

What kind of cutting fluid is used? It also needs to make a comprehensive analysis based on the material of the processed workpiece, the difficulty of the processing process, the processing method, the working conditions, etc. before choosing.

Due to the different contour sizes and complex profiles of automotive ultra-high strength steel plate hot press forming molds, there are a large number of grooves, corners, protrusions and depressions, and the dimensional accuracy and surface accuracy are required. If you process first and then quench, you will collapse and crack. Only by quenching the whole first and then processing can you avoid such phenomena.

In daily cutting, such as small pieces, old equipment, frequent conversion between different materials - this difficult machining condition, it is not enough to have theoretical cutting parameters, and the Walter Titex DC150 series provides the correct hole processing tools for this. At this time, the higher efficiency is not reflected in the theoretical parameters and cutting speed of the tool. The effect that can be achieved is the decisive quality standard. What customers value is: accuracy, process reliability, cost efficiency, and appropriate performance. Customers want to obtain tools that combine high quality and cost efficiency, “Perform” represents precision, reliable process and economical, and the DC150 drill series, as the new product line “Perform”, is an accurate response from Walter to customers who previously had to adopt other solutions for economical cutting. DC150 was launched globally in September 2014.

Cutting fluid is widely used in cutting processing due to its functions such as cooling, lubrication, cleaning and anti-rust. During use, cutting fluid often suffers from spoilage, odor, corrosion, foam production, and skin allergies of the user operator. The following is a discussion of the problems and countermeasures in the use of cutting fluid based on practical experience in work.

The movement components of the air conditioning compressor mainly consist of cylinders, frames, cylinder heads, crankshafts, slides, pistons and other components. Among these components, the cylinders, cylinder heads and frames are often made of gray cast iron (HT250), while the piston is made of nickel-chromium-molybdenum cast iron, and the crankshaft is made of ductile iron QT500-7.

By optimizing the entire metal cutting process, higher productivity and profit margins can be achieved in processing. The basis of this work is to wisely use tool cutting parameters while making full use of machine tool machining capabilities. Achieving effective machine tool utilization includes two important components. First, find a way to maximize the amount of time that the machine can use to cut metal. The second part includes making this time productive, and the second is to try to use this time in a productive, reliable and profitable way.