CN104088908A - Full complement roller bearing sealing slot and machining method thereof - Google Patents

Abstract

The invention discloses a full complement roller bearing sealing slot and a machining method thereof. A trench is formed in the inner diameter outside an outer ring and has a slope of 30 degrees; a method for machining the sealing slot comprises quenching and hard turning; a ceramic turning tool is adopted as a turning tool; a rotating speed n of a machine tool main shaft is 500r/min; the feeding amount f is 0.05mm/r. According to the sealing slot structure, the problem that a bearing sealing ring is easy to loose during mounting is effectively solved, and the service life of a bearing is prolonged.

Description

A kind of roller bearing seal groove and processing method of completely filling

Technical field

The present invention relates to bearing machining field, especially a kind of roller bearing seal groove and processing method of completely filling.

Background technique

Bearing seal quality directly has influence on life-span and the security of operation of bearing.The inefficacy of sealing will make the lubricating status of bearing worsen, and has some trickle dust things and enters between the raceway of bearing, after causing raceway face to fray, easily comes off, and even causes the situation of burning in of bearing.The sealing of high-quality bearing not only should have well deposit fat, dustproof and temperature resistance rises performance, and can make the component structural simplification of lathe.Along with the development in market, completely fill roller bearing kind and quantity and progressively increase, wherein there is split bearing to have Leakage.

Original product sealing configuration is as shown in Fig. 1.The structure of seal ring is comprised of two-part, and its external diameter is metal stamping formed, and another part is to suppress on the basis of eyelet, the sealing configuration that material is rubber.Sealing is that the external diameter of inner seal ring and outer internal diameter and rib are fixed on the rib of lasso, and exterior seal ring is enclosed within on inner seal ring and realizes.Because the external diameter of seal ring is metal, it is transition fit with coordinating of outer internal diameter, and bearing in use finds that inner seal ring becomes flexible phenomenon, has affected the sealing effect of bearing.If employing interference fit, seal ring certainly will produce the sealing effect that distortion affects bearing too so, causes bearing in operation process, to produce Leakage.

Summary of the invention

In order to solve full dress roller bearing seal ring, easily loosening problem is installed, the present invention proposes a kind of roller bearing seal groove and processing method of completely filling, product and ring structure are improved, seal ring is installed rear firmly stable, eliminated loosening phenomenon.

The technological scheme that the present invention solves its technical problem employing is: a groove of inner radius design outside outer ring, and trench slope is 30 °; Processing seal groove is taked the method for the rear hard car of quenching, and lathe tool adopts ceramic tool, machine spindle speed n=500 r/min, feed f=0.05mm/r.

The invention has the beneficial effects as follows: adopt above-mentioned seal groove structure and seal groove structure, effectively solved bearing sealed ring easily loosening problem is installed, extended the working life of bearing.

Accompanying drawing explanation

The existing roller bearing structure sketch that completely fills of Fig. 1;

The partial enlarged drawing of Fig. 2 Fig. 1;

Fig. 3 improves rear sealing configuration partial enlarged drawing;

Fig. 4 improves rear seal ring scheme of erection;

1. exterior seal rings in figure, 2. outer inner radius, 3. inner seal ring, 4. rib place, 5. pad, 6. lasso, 7. roller, 8. drift, 9. stop screw, 10. expander, 11. inner seal rings, 12. workpiece, 13. packing rings.

Embodiment

Below in conjunction with accompanying drawing, the present invention will be further described, as shown in Figure 3, a groove of inner radius design outside outer ring, trench slope is 30 °, the structure of inner seal ring and exterior seal ring is still constant.

Former assembly method is by inner seal ring indentation sealing groove with hand, after improvement, designed specialized mould, with hand, pull press machine and press to drift, after drift is stressed, move vertically downward, the inclined-plane of its bottom surface forces expander to surrounding spreading, its spreading power produces in the rear embedding sealing groove of distortion inner seal ring, fixes, with outer ring as shown in Fig. 4.For making workpiece deformation amount less with pressing-in force in the reasonable scope, only design six points and contact with in groove, as shown in Fig. 3.The height h of six points will have certain requirement, can not be higher than seal groove height, otherwise not only easily mold damage also easily workpiece is damaged.Angle [alpha] can not be too large or too little simultaneously.It is not yielding when too small sealing ring is hit.It is wayward that too large mould is subject to impulse force, mould is easy to unexpected reinforcement seal ring is damaged, stop screw is also wanted fine control on the other hand, when if the long sealed ring deformation of stroke is larger, although can seal ring is fixing well, but can make the geometric accuracy of workpiece change, mould also easily damages.The material of expander adopts 65Mn, makes expander have good elasticity.For guaranteeing that expander has good wear resistance and stability, need heat-treat material, after heat treatment, hardness is moderate, guarantees between 50～55HRC, not only plays fixation but also guarantee that mould is normally used.

Due to the small-sized of seal groove and require comparatively strictly, for workpiece after preventing heat treatment produces distortion, take the method processing seal groove of hard car after quenching.If employing grinding, because grinding space is very narrow, is difficult for the as easy as rolling off a log generation burn of heat radiation, so have to adopt hard car method to solve during grinding.

Introduce the selection of tool material and cutting parameter below.Workpiece adds man-hour after heat treatment, because hardness is higher, needs larger cutting force, will produce more heat, and these all can affect the life-span of cutter.Therefore require cutter to have good wear-resisting property and heat resistance.For turning quenching workpiece, ceramic tool has very high hardness and wear resistance and heat resistance.Through test, select cutting parameter as follows: machine spindle speed n=500 r/min, feed f=0.05mm/r, after turning, workpiece size tolerance reaches 0.05mm, and ovality reaches 0.01mm, reaches technological requirement.

Finally also the most important thing is; embodiment is to of the present invention further illustrating and unrestricted; for those of ordinary skills; can in the situation that not departing from flesh and blood of the present invention, do further conversion, and all these conversion all should belong to the protection domain of claims of the present invention.

Claims (1)

1. completely fill roller bearing seal groove and a processing method, it is characterized in that a groove of inner radius design outside outer ring, trench slope is 30 °; Processing seal groove is taked the method for the rear hard car of quenching, and lathe tool adopts ceramic tool, machine spindle speed n=500 r/min, feed f=0.05mm/r.