Series conical bearing inner ring one-piece flow turning process

Abstract

The invention discloses a series conical bearing inner ring one-piece flow turning process, belongs to the technical field of bearing inner ring turning, and mainly solves the problems of long production process, low production efficiency, high labor intensity and the like of an existing machining method. The series conical bearing inner ring one-piece flow turning process is mainly characterizedin that an ejection mechanism of a clamping system is connected with an ejection claw into a whole through an outer ring, more than one mounting hole is formed in the ejection claw along the radial direction, the shape of the clamping end surface of a clamping claw is matched with the shape of the chamfered part of a workpiece, and the clamping claw is mounted on the ejection claw; and a conical bearing inner ring blank forge piece is sent to a first numerical control lathe through the ejection mechanism of the clamping system to sequentially finish the steps of turning a raceway, turning an inner chamfer, turning a back end face and turning an assembly chamfer, an inner ring machined piece is taken out and sent to a second numerical control lathe to sequentially finish the steps of turning an outer diameter, turning an outer chamfer and turning the inner chamfer. The series conical bearing inner ring one-piece flow turning process is mainly used for the mass production of a series ofconical bearing inner rings with outer diameters phi of 40-200 mm, heights of 10-50 mm and inner holes phi of 20-150 mm.

Description

technical field [0001] The invention belongs to the technical field of turning of the inner ring of a tapered bearing, and in particular relates to a one-piece flow turning process of a series of inner rings of a tapered bearing. Background technique [0002] At present, the inner ring of this type of tapered bearing is mainly processed by conventional technology, and the technological process of processing the inner ring by conventional technology is as follows: the blank is a forging, the outer diameter is φ40-200mm, the height is 10-50 mm, the inner hole is φ20-150 mm, the inner The old process flow: first step (copy lathe), boring, inner chamfering, rear end face → second step (copying lathe), rough imitation shape, front end, outer chamfering, inner chamfering →Third sequence (double-head end face grinder), soft grinding back end face →Four sequence (copying lathe), fine imitation shape, rear edge of the car, front edge of the car, outside chamfering of the car → fifth ...

AI Technical Summary

Problems solved by technology

The disadvantages are firstly that due to the long process flow, manual loading and unloading, and many times of trolley handling, resulting in long production cycle, low production efficiency, high personal labor intensity, and prone to work-related injuries; The precision of the product is low, the mechanical stress is large, and the deformation after heat treatment is large; when the profiling hydraulic lathe is used to process the product, oil cooling is used, which pollutes the environment and is prone to missing processes

[0004] The currently equipped clamping system includes ejection claw 1, clamping claw 2 and ejection rod 5, wherein the ejection claw 1 is a three-claw structure with interactive middle and open outer ends, and guide holes are provided on the concentric circles only on the outside of the three claws 3. The pop-up lever 5 is installed on the guide hole 3, such as figure 1 As shown, the adjustment range of the collet is limited, and the minimum clamping range is more than 120mm inner diameter of the inner ring product 4

Clamping jaws 2 such as figure 2 , image 3 As shown, it is not suitable to clamp the series of tapered bearing outer ring rough forgings. When clamping the series of tapered bearing outer ring rough forgings with large chamfers, the force-bearing area is often small, the clamping force is not enough, resulting in failure to clamp, or during operation There are safety hazards such as dumping

However, a large part of the forgings of the series of tapered bearing outer rings have an inner diameter below 120mm, so they cannot be used for automatic on-line processing of trusses on CNC lathes.

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