CN201843906U - Thrust ball bearing race - Google Patents

Abstract

The utility model relates to a thrust ball bearing race, which is a ring body. The upper end surface of the ring body is provided with an arc-shaped rollway surface, the rollway surface is provided with a hardening layer formed by the hammering of a high-frequency hammer, and the thickness of the hardening layer is 0.5-1mm. The surface layer of the rollway surface is provided with the hardening layer formed by the hammering of the high-frequency hammer, so that the metal organization on the surface layer of the rollway surface of the bearing generates tiny plastic deformation, the waviness of the surface of a workpiece can be smoother, and further, the surface quality of the mirror surface can be reached. By adopting the technology, the metal organization on the rollway surface is more compact, the roughness of the rollway can be improved by more than 3 grades, the roughness Ra can reach 0.1mu m, and even reaches less than 0.1mu m, simultaneously, the microhardness of the rollway surface can be improved by more than 20%, the contact fatigue property of the rollway can be improved, and thus, the bearing capacity of the rollway can be improved by more than 10%, and the service life of the bearing can be improved by more than 30%.

Description

A kind of thrust ball race

Technical field

The utility model relates to a kind of thrust ball bearing, specifically a kind of thrust ball race.

Background technique

At present, in the existing thrust ball bearing processing, because the precision of bearing is mainly reflected on the raceway, particularly the roughness on the surface of raceway and accuracy to shape are the major criterions of weighing bearing accuracy and quality.Quenching processing technology behind the finish turning that China adopts at present, because the quenching phenomenon easily forms cold crack, and, quenching is used proper to thickness, the less part of diameter, for the bigger part of diameter, the depth of quenching is not enough, and therefore the bearing race after the processing is fragile.And thrust ball bearing is owing to unreasonable structure in the prior art, and the set-up mode of its roller surface and roughness all do not reach requirement, therefore causes the lower and quick abrasion of this kind bearing accuracy, increases the economic burden of enterprise virtually.

The model utility content

The purpose of this utility model provides a kind of thrust ball race, and it is simple in structure, and when improving the bearing running accuracy, improved more than 30% its working life.

The utility model is for realizing the model utility purpose, the technological scheme that adopts is: a kind of thrust ball race is an annular circle body, is provided with the circular arc roller surface in the upper-end surface of circle body, be provided with the hardened layer that the hammering of high frequency tup forms on roller surface, the thickness of this hardened layer is 0.5～1mm.

The surface roughness Ra value of described hardened layer≤0.1 μ m.

Because conventional roller surface adopts finish turning processing rear surface Quenching Treatment, relatively poor and the easily formation cold crack of back that quenches of surface quality after this kind processes, raceway face is crisp firmly, be in the roller contact process, be easy to damage, therefore, this kind bearing reduces working life greatly, and the utility model is provided with by the hammering of high frequency tup on the roller surface top layer and forms one deck hardened layer, make the top layer metal structure of race way produce the plastic deformation of trace, it is smooth that the waviness of workpiece surface tends to further, thereby reach the surface quality of minute surface, so, this roller surface not only makes bearing running accuracy height, and has promoted the working life of bearing.

The beneficial effects of the utility model are:

This roller surface top layer is provided with by the hammering of high frequency tup and forms one deck hardened layer, make the top layer metal structure of race way produce the plastic deformation of trace, it is smooth that the waviness of workpiece surface tends to further, thereby reach the surface quality of minute surface, adopt this technology can make the metal structure on raceway top layer fine and close more, the raceway roughness is promoted 3 more than the grade, roughness Ra value can reach 0.1 μ m, even reach below the 0.1 μ m, the micro-penetration hardness of raceway face is improved more than 20%, improved the contact fatigue property of raceway.Thereby improved its bearing capacity more than 10%, bearing life improves more than 30%.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of usage mode of the present utility model;

Mark among the figure: 1, circle body, 2, roller surface, 3, hardened layer, 4, blowout patche, 5, seat ring, 6, rolling element, 7, retainer.

Embodiment

As shown in Figure 1, a kind of thrust ball race is an annular circle body 1, is provided with circular arc roller surface 2 in the upper-end surface of circle body 1, is provided with the hardened layer 3 that the hammering of high frequency tup forms on roller surface 2, and the thickness of this hardened layer 3 is 0.5～1mm.

The surface roughness Ra value of described hardened layer 3≤0.1 μ m.

Fig. 2 is the structural representation of usage mode of the present utility model, has constituted thrust ball bearing by blowout patche 4, seat ring 5, rolling element 6 and retainer 7.

Hardened layer on the roller surface described in the utility model is to be formed by the hammering of high frequency tup, the high frequency tup is the vibratory tool head, this vibratory tool head carries out the hammering of ultra-high frequency to race way greater than 30,000 times vibration frequency with per second, when the surface of vibratory tool head with the vibration hammering bearing race of high frequency, make the top layer metal structure of race way produce the plastic deformation of trace, it is smooth that the waviness of workpiece surface tends to further, make the roller surface top layer form one deck hardened layer, this technology is to be media becomes radial spread in the metal surface a kind of quantum with the finish, its effect is to make the electronic shell of metallic material atom absorb this quantum, the electronic shell activity is more active, atomic nucleus is relative with the electronic shell combination force to diminish thereby cause, the combination force of atom and atom diminishes, metallic material plasticity under the effect of this quantum changes, and ductility improves.Adding frequency in addition again is the high frequency vibration of 30KHz, when vibration transducer detects the dither of amplitude 3-5 micron, promptly this state is an optimum Working, the micro-penetration hardness of raceway face improves more than 20% before the processing simultaneously, the roughness that the roughness ratio of raceway generally grinds out improves 3 more than the grade, roughness Ra value can reach 0.1 μ m, even reaches below the 0.1 μ m, and the more traditional abrasive process of work efficiency improves more than 50%.

The utility model, it is simple in structure, and roller surface is provided with rationally, especially is provided with on roller surface by high frequency tup hammering formation hardened layer and has better solved difficult problems such as the bearing running accuracy is not high and easy to wear.

Claims (2)

1. thrust ball race, it is characterized in that: be an annular circle body (1), be provided with circular arc roller surface (2) in the upper-end surface of circle body (1), be provided with the hardened layer (3) that the hammering of high frequency tup forms on roller surface (2), the thickness of this hardened layer (3) is 0.5～1mm.

2. a kind of thrust ball race according to claim 1 is characterized in that: the surface roughness Ra value of described hardened layer (3)≤0.1 μ m.

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