Double vertical clamping structure for finely adjusting double-worm-wheel fly cutter radially

Abstract

The invention discloses a double vertical clamping structure for finely adjusting a double-worm-wheel fly cutter radially. A center hole which faces the active end and is concentric with a rotating central line of a cutter bar is formed in the passive end of the cutter bar, two parallel two-section stepped concentric holes for mounting, clamping and finely adjusting the fly cutter are radially formed along the rotating central line of the cutter bar, large holes of the two-section stepped concentric holes are cylindrical holes, small holes of the two-section stepped concentric holes are screwthrough holes, and the center distance between the two-section stepped concentric holes is the axial tooth pitch of a working worm; two sections of threads which are the same in screwing direction anddifferent in screw pitch are arranged on a locking screw and correspondingly connected with the screw through holes and a screw hole formed in a fly cutter round straight handle, so that the fly cutter is never loosened after being finely adjusted and clamped in the radial direction of the cutter bar; and a positioning clamping mechanism is arranged in the center hole, the oblique end faces of the opposite ends of a positioning jacking rod slide onto the obliquely-beveled plane of the fly cutter round straight handle to form close face contact under the combined action of the locking screw and a force applying component, and the fly cutter is fastened in the corresponding cylindrical hole and located at the correct position. The radial fine-adjusting and positioning double vertical clamping technical scheme is suitable for high-precision and large-cutting-force rolling cutting of multi-head worm wheels.

Description

technical field [0001] The invention relates to a double vertical clamping structure of a radial fine-tuning double worm gear flying knife, which is mainly used for hobbing of a multi-head worm gear driven by a cylindrical worm with a large lead angle and a large lead angle with small diameter, high precision and large cutting resistance. Background technique [0002] When hobbing and cutting worm gears, because the basic geometric parameters of the worm gear hob must generally be the same as the working worm (that is, the worm meshed with the worm gear to be hobbed), the worm gear hob is a highly targeted special tool with low utilization rate and high price. The production cycle is long and it is not economical to use, and it is difficult to manufacture multi-head worm gear hobs. It is not economical to manufacture worm gear hobs in single-piece small batch production. Toothed worm gear hob, its gear cutting principle is the same as that of tangential worm gear hob. The m...

AI Technical Summary

Problems solved by technology

This kind of clamping structure has a large clamping force, and the flying knife is not easy to loosen. However, these two clamping structures are arranged along the radial direction of the knife bar to install the round tie rod and the round hole of the flying knife to cross vertically, which weakens the strength and rigidity of the knife bar. This vertical staggered hole structure is suitable for occasions where the diameter of the working worm (cutter bar) and the center distance between adjacent flying knives are relatively large, so the use of multiple flying knives is limited, and in order to avoid the difficulty of manufacturing and adjusting the flying knives of multiple flying knives , had to be replaced by a single flying knife, reducing productivity

Because the number of flying knives is very small and the cutting volume is large, the cutting edge is easy to wear, and the local wear increases quickly, which increases the cutting resistance, and because the flying knives are tangentially fed, when the flying knives roll from the cutting end to the cutting end At the end, the cutting edge of the flying knife cuts from one side to both sides and then to the other side, and the flying knife generates a large periodic alternating torque along its axis. There is a small gap in the round hole, and it is affected by the rigidity of the tool holder and the supporting end and the gap between the rotating parts such as the bearing. The poor dynamic stiffness will easily cause vibration, and the flying knife will loosen, fall off or even be broken under the action of alternating cutting impact force. Worm gears, etc.; especially the diameter of the working worm is small, the modulus or cutting force is large, especially the cutting conditions of the cutting edges on both sides of the flying knife with a large lead angle are quite different, and the above clamping structure is not competent

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