The gap between most domestic tool enterprises and international first-line tool brands in the aspect of hard bit mainly lies in design concept, manufacturing details, material selection and coating treatment. The specific products with the biggest performance gap between domestic and foreign drill bits are: drill bits for processing steel parts, deep hole twist drills for replacing gun drills, and bits for processing materials such as superalloy and high hardness steel. In these fields, only a few domestic enterprises have mastered the design and manufacturing technology. The present situation of solid end mills can be divided into general type and high-end type. Generally speaking, the technical difficulty of universal end milling cutter is relatively small, and the gap between product quality and foreign countries is not very big. In fact, most of China’s cemented carbide tool enterprises, including private cutter enterprises, state-owned tool factories and Taiwan knife enterprises in mainland China, mainly produce solid end mills. Domestic end mills occupy most of the middle and low-end markets in China with low prices, and the competition is very fierce.
However, in some high-end manufacturing fields such as difficult machining and high-speed milling, there is still a certain gap between the quality of China’s solid end mills and the world’s first-line brand cutters, such as milling cutters for high-hardness materials, high-speed milling cutters, titanium alloy milling cutters, graphite milling cutters, aviation fusion material milling cutters, precision milling cutters, etc. These end mills have high added value, and the main market share is occupied by foreign manufacturers, such as Sandvik, Kenner, Daijie, Hitachi, frasa, prototyp, SGS, jabro, OSG, Hanita, LMT, etc.
According to the incomplete survey, there is about 1.5 billion yuan demand for high-end end end mills in the Chinese market in 2010, and the localization rate is close to 30%. The challenges and necessary improvements are as follows: mechanical and structural characteristics: hardness, strength, wear resistance; thermal and chemical characteristics: heat resistance, insulation, catalysis; biological characteristics: adaptability and insecticidal characteristics; electronic and optical characteristics: reflection, transparency, etc.
High speed steel tools, cemented carbide tools, cermet tools and PCD / PCBN superhard tools are commonly used in the Chinese market. High speed steel tools, except for complex forming tools, blade root milling cutters, gear hobs, Broaches and taps, are mostly low-end tools with large quantity and low value. With the rapid upgrading of China’s manufacturing industry, the continuous promotion of excellent cutting technology and cemented carbide tools, the domestic market of high-speed steel tools is shrinking, and its share is less than 60%; cermet maintains an advantage in the precision turning of steel and cast iron, and its market share is about 2%; Ceramic cutting tools are widely used in high-speed milling, especially in the field of aviation difficult to machine materials, accounting for about 1% of the market share; the market share of superhard materials PCD / PCBN is about 2%, mainly concentrated in the processing of non-ferrous metals and ferrous metals.
The present situation of the whole hard drill bit is the molding processing under the condition of poor cooling and chip removal, with high technical requirements, so the added value of bit products is also high. The products of high-end hard bits are mainly used in automobile, aviation, engineering machinery, high-speed railway, power equipment, power equipment, refrigeration equipment and other high-end precision machining fields.
At present, the common high-end hard bits in the Chinese market mainly come from developed countries such as Europe, the United States and Japan, such as Sandvik, Kenner, cobalt collar, Titex, mapa, Mitsubishi, Sumitomo and eurojet from Japan. According to Luo Baihui, Secretary General of the International Mould Association, most of these enterprises have a large stock of standard bits in Singapore or mainland China, and some non-standard bits are also produced in China. The quality of drill bit products in South Korea and Taiwan is not strong, so it is rare in the market.
“In recent years, Ti, Al coated cemented carbide tools have dominated the high-performance tool market. The high demand for machining machine parts in some special applications promotes the development of special or accurate coatings. ” Luo Baihui, Secretary General of the International Mould Association, pointed out that we must face up to the gap between Chinese cutting tool enterprises and foreign enterprises, including basic technology, innovation ability, promotion ability and service ability. We should let users’ demand and cutting tool enterprises become the leading enterprises, and leading enterprises should take the lead in the field of technology application.
Contact with the mechanical processing industry for many years, many customers have consulted the same problem. In the process of aluminum oxidation treatment, whether there is a definite impact on the accuracy of mechanical parts? Whenever the customer mentions this problem, we will inform the customer in detail. Aluminum oxidation does have an impact on the accuracy of mechanical parts, because oxidation is a chemical treatment, which can modify the surface of aluminum and improve the hardness of mechanical parts. This is also chemical coating technology!
How to control the accuracy of mechanical parts in the process of aluminum oxidation treatment? If there is a precision request for the thickness process dimension of fine mechanical parts, the process size or negative difference dimension of the machined parts can be increased according to the accurate size after oxidation treatment, so as to ensure that the fine and dense machined parts meet the process requirements on the drawing after the oxygenation treatment. In the machining process of mechanical parts, not only the paper size thickness has precision, but also the size request of fine hole, step, hole to edge, etc., which is the same as the processing method of thickness request.
Aluminum oxidation has an impact on the accuracy of mechanical parts, but it can be controlled in the machining process of mechanical parts, which can ensure and meet the process requirements on customer drawings!
The main service scope of the products is machinery, electronics, automatic assembly line, communication, mold, medical, automation special production equipment and other industries. At the same time, all kinds of materials are processed
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