High efficiency and economic hobs must have a lot of grooves and not too large. The cutting surface of the top of the diameter hob should exceed the face of the central cutter tooth and the tooth undercut. To meet the above needs, the hob developed by Hanjiang Tools Co., Ltd., has a new structure and high efficiency, and each adjacent double cutter hob tooth has a row of teeth with complete tooth profile, and the other effective department only has 1 / 3 tooth height row teeth.
The promise of the case hob diameter about 20 exhaust groove, computer gongs processing and ordinary hob is 2 times. According to the requirements of workpiece quality, the new structure and efficient system of double cutter hob shovel can also be polished. Because the complete gear hob is about 10 lines, it can be used not only for rough, but also for gear machining. In rough machining, rake hob can also be used to reduce cutting force and wear.
The new structure double cutter hob can be effectively ground on any scale hob grinder. Before the blade accuracy can be ensured after clamping, what is needed is an adjusted depth grinding wheel hob groove. The design principle of hob is not only limited to module or diameter measuring involute gear hob, but also used for the tooth profile of special gear hob. According to different requirements, the company can also make three or four cutting hobs, but it is still the most effective cutter with new structure.
The new structure is suitable for the field of gear undercutting hob with high requirements. Because the number of teeth (usually 20 teeth) of gear hob tip is used in small module gear processing, the number of gears is processed in gear processing. Therefore, the high-efficiency double cutter hob processing gear and the new structure can get a good end of circular arc gear.
New structure double cutting hob for effective utilization
The new high-efficiency double cutter hob structure is mainly used for processing large module gears in many fields of energy, ship, cement, mining, metallurgy, building materials and machinery industries. In order to quickly occupy the market and expand the production scale, many industrial enterprises still buy large hobbing machines, high-speed and high-efficiency double cutting hobs and the characteristics of new structure, this kind of efficient cutting. The new high efficiency double cutting hob structure has the same specification of ordinary hob, and the cutting efficiency has been improved 3 ~ 4 times. Therefore, the development of new efficient double cutter structure mapping tool needs to be satisfied, which can replace the import. It is a high-speed and efficient cutting for industrial gear processing requirements in China. It can give full play to the function of CNC equipment and accelerate the pace towards high-end products. It has a very broad market prospect and social and economic benefits.
- Application materials
The structure and high efficiency function of the new double cutting hob are made of high speed steel and powder metallurgy high speed steel. By adjusting the basic chemical composition and adding other alloy elements, the mechanical function and cutting function of ordinary high speed steel have been greatly improved. At room temperature, the hardness of high-performance high-speed steel can reach hrc67-69, and the high-temperature hardness can also be improved accordingly. It can be used for machining high-strength steel, superalloy, titanium alloy and other difficult to machine materials, and can improve the service life of tools.
The manufacturing quality of high speed steel is affected by many factors, including the effect of influencing factors and the difficulty to improve. The average is the size control of carbide distribution and thickness.
In smelting high speed steel, carbide segregation is serious, which can be completely eliminated by powder metallurgy. The basic principle is that molten steel is melted in high frequency induction furnace and atomized into powder by high pressure inert gas. Powder metallurgy high speed steel and smelting high speed steel have many advantages, such as high toughness and hardness, grinding function can be significantly improved, average material, heat treatment and small deformation, the quality is unreliable, so the service life of the product is longer. It can be used to cut various kinds of P / M high-speed steel, especially suitable for manufacturing precision cutting tools and complex shaped knives. Self lubricating bearing
- Hob coating
Coating technology is used to solve the contradiction between strength and toughness. By optimizing the lattice structure of the coating, adding alloy elements and multi-layer coating combination, it has made progress. It has strong toughness, and greatly improves the tool cost and cutting speed under the premise of adapting to different cutting conditions. Multi layer structure and nano composite coatings are the development of new tool coating materials. The research field of tool coatings and special functional coatings will become a new tool.
Coating technology mainly includes chemical coating (CVD) and physical (PVD) coating technology. The characteristics of contemporary CVD coatings are multilayer coatings, including TiCN, tic, tin, zncn and alumina. Through good control of CVD process, tool manufacturers can now provide quality coating tools with coating thickness ranging from 5 μ m to 20 μ m, which can be used for workpiece processing of high hardness materials, and multi-layer coating alloy tools with single layer coating thickness less than 0.2 μ M.
PVD coating technology in cermet, cemented carbide substrate thickness of 2 ~ 5 μ m, this hard coating has entered the trade. Typical trades include tin, TiCN coating methods, TiAlN, CrN, TiB2 plastic industry networks, such as tin TiAlN multilayer coatings. The unique advantages of PVD coating process can provide sharp cutting edge, ultra-fine particles, smooth surface, low friction and high temperature cracking resistant coating.
New developments in externally coated cemented carbide tools include bonding with internal tin, tin or tialnpvd coatings TiCN / tincvd coatings. Internal CVD coating can provide excellent substrate adhesion and wear resistance, large modulus gear machining and external PVD coating provide solid, not brittle fracture, smooth surface, surface ultrafine grain tools. The combination of CVD and PVD coating can prolong the service life of tool refractory metal materials and steel in intermittent cutting.
Tin, TiCN or TiAlN coatings are mainly used for gear cutting tools and their chemical composition is not random,
报错 笔记
About the author