Bevel positioning lathe fixture for precision forging bevel gear

Abstract

The invention discloses a bevel positioning lathe fixture for a precision forging bevel gear, which comprises a connecting disk, a claw base, a pull rod, a tension spring, a pin, a draught spring, a shaft pin, a positioning disk, a bolt, claws, a gear mould and a screw, wherein the connecting disk is sleeved with a spigot at the left end of the positioning disk and is connected with the spigot through the bolt; the gear surface of the gear mould is rightward; a spigot at the left end is coaxially matched with an inner hole of the positioning disk and is connected with the inner hole through the screw; a claw disk is arranged in the connecting disk and is in clearance fit with the connecting disk; the tension spring is arranged between parallel end faces of the claw disk and the connecting disk; the pull rod is connected in series with the claw base, the draught spring and the connecting disk; 3 to 5 claws hinged by the shaft pin are evenly distributed at the radial end of the claw base; the right end of the claw extending rightwards protrudes and a bent hook is inward; and both ends of the tension spring tow the claws and the pin respectively. The bevel positioning lathe fixture for the precision forging bevel gear has the advantages of compact structure, small volume, accurate positioning, reliable clamping, and easy assembly and disassembly, and is particularly suitable to be used as a mating fixture of a numerical control lathe to machine bevel gears.

Description

technical field [0001] The invention relates to a turning fixture, in particular to a turning fixture for a numerically controlled lathe. Background technique [0002] Bevel gears are a kind of transmission parts, and the shape and position accuracy of the shaft holes relative to the bevel teeth are relatively high, and the manufacturing is difficult. Precision forging forming technology is an advanced technology for batch manufacturing bevel gears in the contemporary era. The precision forging and forming bevel gears are only formed by bevel teeth, and the shaft holes are still finished to achieve the design size and accuracy. In the existing technology, the shaft hole is finished in the form of precision forged bevel gear positioning, such as a "bevel gear fixture" technology disclosed in Chinese Patent No. 03264508.2. Evenly distributed ball stud pins contact the groove of the bevel gear to be processed to achieve positioning, and then are pressed by the clamping structu...

AI Technical Summary

Problems solved by technology

This technology better solves the problems of bevel gear positioning and shaft hole finishing. Due to the influence of the clamping structure, the shaft shoulder cannot be finished under the same positioning and clamping conditions.

Separate positioning, installation and finishing machining are not easy to achieve design accuracy, and the auxiliary man-hours are long and the manufacturing cost is high

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