Synchronous belt manufacturing process

Synchronous belt wheel manufacturing technology greatly to the development of the above-mentioned precision grade and the production efficiency. Now since the seventy s the manufacturing precision of all kinds of synchronous belt wheel, general improvement level or so. Some even 2 ~ 3 grade. Generally low speed synchronous belt wheel precision from the past 8 ~ 9 to 7 ~ 8. The machine synchronous belt wheel is raised from 6 ~ 8 to grade 4 ~ 6. The synchronous belt of rolling mill is raised from 7 ~ 8 to 5 ~ 6. With the development of high performance gear machine and the improvement of tool material, the roller tooth efficiency has been greatly improved. The cutting speed is 90m/s, which can be reached under the condition of large feed and under the condition. If use superhard hob processing module 3 quenched and tempered steel synchronous belt wheel, cutting excessive can reach 200 m/s. Improve the efficiency of gear shaper, gear shaper cutter reciprocating motion structure to limit. Recently, the efficiency has been greatly improved after the development of the new structure such as tool unloading, using static pressure bearing and strengthening the tool frame and column rigidity. The number of strokes of a new type of gear machine can be reached 2000 times.

Synchronous belt steel

Synchronous belt wheel (imported polyurethane synchronous belt) with steel development trend; One is low alloy steel with Cr, Ni and Mo. Second, the boron steel; Three is the carburizing of carbon nitrogen; Four is easy to cut steel. Due to the lack of Ni and Cr in our country, the use of 20CrMnTi is commonly used for the carbonized steel or the use of boron and rare earth steel. Heavy machinery is commonly used in 18CrMnNiMo carburizing steel or medium carbon alloy steel. The machine tool industry has 40Cr, 38CrMoAl and other steel and high-speed synchronous belt wheel with 25Cr2MoV steel for nitriding.

Informational trends

People can use computer to the variety of possible design calculation, analysis and comparison, and through optimizing, obtain ideal results. On the analysis of the tooth surface contact area, for example, strives for the line of action and the relative velocity Angle, the elastohydrodynamic lubrication and geometric parameter calculation program is compiled. Also, the synchronous belt wheel modification calculation and synchronous belt wheel bearing capacity computing program have. China has compiled the GB3480-83 involute cylindrical synchronous belt wheel bearing capacity calculation standard application software, for production application. In terms of synchronous belt wheel processing, can use computer to control the gear cutting process. The manufacturing quality is stable and reliable. At present, the domestic application of microcomputer in research of arc tooth taper synchronous belt wheel teeth calculated, adjust the card can adjust processing deviation in time. Make the tooth contact achieve ideal position, and greatly improves the working efficiency.

In addition, according to the principle of numerical control, the application of microcomputer for the parabolic shape of the spiral tooth surface of the toroidal worm is applied to the production. Although the work is still in its infancy in China, it is of great importance to improve the quality and technical level of the synchronous belt.

Internationally, synchronous belt wheel device is developing along the direction of miniaturization, high speed and standardized. Especially the application of synchronous belt wheel, a planet of synchronous belt wheel synchronous belt device development, low vibration, low noise, synchronous belt wheel device was developed some characteristics of the synchronous belt wheel design. To achieve synchronous belt wheel device miniaturization, can improve the existing bearing thrust of the involute synchronous belt wheel. It is commonly used in countries to improve hardness to reduce the size of the device. It can also be applied to the special tooth shape of the circular arc synchronous belt wheel. The ship's main drive system developed by the UK and France, which USES circular arc synchronous belt wheel, greatly reduces the height of the reducer. With the tendency of the ship's power to be replaced by medium-speed diesel, the use of high-power planetary synchronous belt gear on large ships is effective. Now metallurgy, mining, cement mill and other large transmission device, the planetary synchronous belt wheel with its small size, good coaxial, the advantages of high efficiency and applied more and more.