After Shanghai, Wuxi, Wuhu, Tianjin, Beijing and CIMT, MAPAL's new product technology conference came to the four cities of Dalian, Shenyang, Changchun and Harbin in the northeast. For this trip to MAPAL Northeast, MAPAL puts the drill bit products into the main product line.
For a long time, the industry's understanding of MAPAL products was mainly reflected in precision boring tools and composite tools. As a leader in precision machining of holes, Marpa has always been at the forefront of technology in the development of drilling tools, and continues to break through tradition in application. At present, Marpa not only provides users with a variety of standard drills, but also can use its own technical advantages in non-standard areas to provide users with a variety of high-performance non-standard drills.
An example of a successful and innovative process, GIGA drills, high-precision solid carbide four-slot drills, has excellent performance in the processing of steel, cast iron and aluminum alloy materials. The tasks of cutting, guiding and bracing are well integrated on one tool. This is different from traditional additional chamfering drills. Four asymmetrical lands are both cutting edges and supporting edges, even if they are doubled by China Metalworking Online. Even under higher feeds, smooth cutting is guaranteed. This is the most efficient drill on the market today, which reflects the consistent development philosophy of MAPA.
MAPA GIGA-drill bit 
In the four lands of the GIGA drill bit, each of the two cutting edges and their ribs assumes the task of drilling and reaming. Through the arrangement of the two sets of cutting edges and the corresponding grinding, the drill bit has a very high drilling accuracy (up to IT8), the surface roughness is best up to Ra 0.8 Øm, the concentricity is less than 4 Øm, and there is a high With dimensional stability, the same effect as described above can be obtained even if the non-continuous holes are processed. In addition, there are MXF coatings developed specifically for drilling processes to ensure proper cutting in harsh environments at high temperatures. Practice shows that such drills have a very long life and extremely low wear.
The processing of pre-cast holes, cross-holes, slant holes, and hole-breaking parts has always been a difficult problem. The traditional drill bit China Metal Processing Online Co., Ltd. can not only ensure the stable quality requirements, but also can not improve the efficiency. The GIGA drills solve these problems very well. It can not only correct the positional deviation of the pre-bores, but also ensure that the holes have a good straightness. It can be said that the GIGA bit is a drill with a processing content that can be completed by several conventional tools.
The application example of this bit is briefly introduced below, from which we can understand its excellent performance.
·Processing Example 1: Pre-cast spark plug holes on the V8/V12 cylinder head were machined with a GIGA drill with a diameter of Ø24 mm and a total length of 203 mm. The length of the hole was 120 mm, and 10 mm of the initial part was on a slope of 5° to 7°. The cutting parameters used are shown in Table 1. GIGA drills have a machining life of up to 9000 holes and for the first time they have achieved trouble-free machining of the spark plug holes, which has caused severe chatter in the machining and even broken drill bits.
· Processing example 2: This is a change from the original processing method to use GIGA drill bit to process steering gear carrier (Material HT250, see Table 2 for details).
Improved results mean savings of more than 30,000 euros a year!
• Processing Example 3: The GIGA drill was used to machine the connecting bolt holes of the 6-port and 4-valve cylinder heads. Workpiece material HT250, bore Ø13mm, hole depth 40mm, SK40 holder. Originally used ordinary double-edged drill bit processing, speed 2450r/min (Vc=100m/min), feed 650mm/min, machining a hole in the 4 steam valve cylinder head takes about 70 seconds, processing a 6 China Metal Processing Online copyright All holes in the cylinder head cover require 95 seconds and the drill life is 1250 holes (cut length 50m). After the GIGA drill bit was used, the machining time of the 4-steam cylinder head hole was shortened to 36 seconds, and the machining time of the 6-steam cylinder head hole was shortened to 52 seconds. According to the average output, 500 hours of machining time could be saved. The GIGA drill has a rotational speed of 2000r/min, a feed rate of 1200mm/min, and a drill life of 140m (3500 holes), which is almost 3 times that of an ordinary double-edged drill.
Corresponding to the precision manufacturing of the GIGA drill bit's China Metalworking Online copyright is its price situation, which is also what the user wants to know. Obviously, the choice of drill bit can not only consider the price factor, because GIGA drill bit is higher than ordinary drill bit both in terms of tool manufacturing cost and dressing cost, which is also where the user needs to balance. However, the cost of a single Chinese metal processing online product using a GIGA bit is obviously a lot of cost. Over the years, reducing production costs by increasing processing efficiency has been recognized by users. Therefore, comparing the total processing costs required for total part production, the cost savings from using GIGA drill bits is considerable.
As a process with the largest amount of cutting in machining, the technical progress of drilling tools currently lags behind in the machining of cars, milling and boring, which seriously restricts the overall improvement of high-efficiency machining in modern production. At this stage, the technical progress of the drill bit is mainly reflected in material improvement and coating applications, such as ultra-grain cemented carbide with a grain size of less than 0.5 μm, and materials such as PCD China Metal Processing Online. The commonly used coatings include TiN and TiAlN. CrN, DLC, etc., but the drill bit has not been a major breakthrough in the structure. The successful development and application of the GIGA drill shows that efficient machining of the drilling can be achieved. In addition, Marpa also developed 6-slot and 8-slot drill-joint drills with hole tolerances up to IT7, and 15 to 30-pitch drill drills with deep holes, etc. This is the responsibility of Mapa for technological advancement. It will also continue to explore and introduce better tools to China.
About Marpa
As a medium-sized family-owned company, MAPAL Praezisionswerkzeuge Dr. Kress KG has been a leader in the metal processing industry for decades as a supplier of high-precision cutting tools. From bar-type tools, diamond tools, HSK clamping systems, unfolded tools to drills, high-performance reamers, general ISO standard tools, tool setting tools, PCBN tools, comprehensive tool services (CTS), etc. Continuous innovation is the leader of the industry. His ability to innovate and develop his capabilities based on the customer's specific requirements is well known in the industry.
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