Numerical-control double-cutter-head gear milling machine for straight bevel gears

Abstract

The invention relates to a numerical-control double-cutter-head gear milling machine for straight bevel gears. The numerical-control double-cutter-head gear milling machine comprises a tool body assembly, a main driving box assembly, a cradle assembly, a cutting tool box assembly, a workpiece box assembly, a saddle turnplate assembly and the like. The numerical-control double-cutter-head gear milling machine is characterized in that the cutting tool box assembly comprises an upper tool holder component, a lower tool holder component, an upper tool box component, a lower tool box component, an upper-lower tool holder angle adjusting mechanism, an upper tool box transverse movement adjusting device and a lower tool box transverse movement adjusting device, and the upper tool holder component, the lower tool holder component, the upper tool box component, the lower tool box component, the upper-lower tool holder angle adjusting mechanism, the upper tool box transverse movement adjusting device and the lower tool box transverse movement adjusting device are installed on drum wheels of the cradle assembly. A spring damping device used for eliminating movement gaps during scale division actions is arranged in the workpiece box assembly. The numerical-control double-cutter-head gear milling machine has the advantages that the overall rigidity of a gear machine tool can be improved, the structure of the machine tool, various movement axis transmission chains and adjustment calculation programs are sufficiently simplified, the manufacturing cost is reduced, and the gear cutting machining accuracy is substantially improved; large-scale gear machining can be achieved, and requirements for machining a single gear or a small batch of various gears can be met.

Description

technical field [0001] The invention belongs to the technical field of gear processing machine tools, in particular to a numerically controlled double-cutter straight bevel gear milling machine. Background technique [0002] Straight bevel gear milling machines are widely used in transmission gearboxes, internal gears of reducers and rear axle shaft gears of cars, and can also be used in general machine manufacturing industries. Its main processing feature is that the tooth line in the tooth length direction of the cut gear teeth is an arc, and the slight protrusion in the middle of the tooth surface is drum-shaped, also known as drum-shaped teeth. When the drum-shaped teeth mesh, the contact area is on the tooth surface. The middle part gradually expands with the operation and running-in, so the force is good. [0003] Straight bevel gear milling can be divided into horizontal single-station spur bevel gear milling machine and vertical double-station spur bevel gear millin...

AI Technical Summary

Problems solved by technology

The planetary mechanism and the clutch are used together to realize the tooth-splitting movement, and the gear ratio and the number of teeth of the gear pair to be processed are adjusted. In actual operation, not only the calculation is complicated, but additional manufacturing is required, which increases the processing cost and machine tool adjustment and configuration time. Therefore, it is not suitable for single-piece or small-batch gear processing

In addition, due to the use of two sets of cradle structures, the transmission chain of the transmission device is longer, and the transmission accuracy and transmission efficiency are low, which affects the processing efficiency of the machine tool

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