CN104121292A - Method for simply configuring axial clearances of sealed four-row conical roller bearing - Google Patents

Abstract

A method for simply configuring axial clearances of a sealed four-row conical roller bearing comprises the following process steps that firstly, the end face size tolerance of double-roll-way outer rings is compressed within the product design requirement range, meanwhile, the effect of the end faces of inner rings on the middle axial clearance is considered, the size deviation between end face working procedures of the inner rings is changed into the plus deviation opposite to the double-roll-way outer rings, and the tolerance range of the end faces of the inner rings is equal to that of the end faces of the double outer rings; on the basis of the product design principle, the influence value of the end face actual deviation in the sleeve ring grinding machining process on the size of the double-roll-way outer rings, the size of inner ring roll ways and the size of flanges is considered, and therefore the requirement of the design is met. According to the method, it is ensured that the axial clearances of the bearing are within the qualified range, full-interchanging assembling of the double-roll-way outer rings and the inner rings is met, serious waste of the repeated machining production is reduced, and production efficiency and product quality are improved.

Description

A kind of simple and easy collocation method of sealed four-row tapered roller bearing axial internal clearance

Technical field

The present invention relates to bearing manufacturing technology field, particularly relate to a kind of simple and easy collocation method of sealed four-row tapered roller bearing axial internal clearance.

Background technique

Four-row tapered roller bearing can bear larger axle, united load, thereby is widely used in the industries such as milling train, metallurgy.Along with main frame demand for development, four-row tapered roller bearing has developed multiple modification structures at present, and sealed four-row tapered roller bearing as cageless in inner ring, outer astragal spacer ring is exactly a kind of main structure form (see figure 1).

When the axial internal clearance of this bearing of configuration, the axial internal clearance of two row roller bearings of both sides is to realize by the thickness of apolegamy or reconditioning outer ring spacer, and this is easy to accomplish, does not introduce here.Key is the axial internal clearance configuration of centre two row rollers cageless between two inner rings.According to JB/T8236-2010 < < rolling bearing biserial and four-row tapered roller bearing play and adjusting method > >, Fig. 2, Fig. 3 are shown in the measurement of the adjustment of the actual axial internal clearance of bearing and h1, h2, and it calculates by formula (1).

Ga=C1-(h1＋h2)…………………（1）

In actual course of working, even if the end face of two outer rings, inner ring, raceway and rib size require processing according to product specification, but when bearing finished products trap, the actual axial internal clearance of bearing does not meet the axial internal clearance that converts and get by formula (1), often there is underproof phenomenon in batches, its value is not to be exactly greatly little, and up-to-standard rate only can reach 30% left and right, is not therefore that reconditioning inner ring face size is exactly the two outer ring raceway sizes of reconditioning.Not only cause the serious waste in repetition processing, and when reconditioning inner ring face size, cause inner ring raceway bus to change to the variation of datum end face inclination and angle etc.; When reconditioning outer ring raceway size, the both sides outer ring raceway size that causes adjusting with outer spacer ring axial internal clearance is inconsistent, and result makes bearing when bearing load, because unbalance loading phenomenon occurs unbalance stress, causes bearing premature failure.

Summary of the invention

Production waste and the impact on quality of product that the present invention causes when overcoming reconditioning inner ring face size and reconditioning outer ring raceway size, a kind of simple and easy collocation method of sealed four-row tapered roller bearing axial internal clearance is provided, the method guarantees that axial internal clearance is in acceptability limit, met the full interchange assemble of outer ring with double raceway and inner ring, reduced and repeated the serious waste in processing, improved manufacturing efficiency and quality of product.

The technological scheme adopting is:

A kind of simple and easy collocation method of sealed four-row tapered roller bearing axial internal clearance, by analysis, without the axial internal clearance of two row raceways in the middle of cone spacer four-row tapered roller bearing, be to be determined by the face size of two outer rings, inner ring and outer, inner ring raceway size and inner ring rib size, the method comprises following process step:

Step 1, first in product specification claimed range, the face size tolerance of two outer rings is compressed, simultaneously, consider the influence of inner ring end face in middle axial internal clearance, the end face inter process size deviation of inner ring is become to "+" deviation reverse with outer ring with double raceway, and its tolerance range is identical with two cycle surfaces;

Step 2, combination product design principle, takes into account end face actual deviation in lasso Grinding Process, to reach the requirement in design to the influence value of its outer ring with double raceway and inner ring raceway size, rib size.

The present invention guarantees that bearing axial play is in acceptability limit, has met the full interchange assemble of outer ring with double raceway and inner ring, has reduced and has repeated the serious waste in processing, has improved manufacturing efficiency and quality of product.

Accompanying drawing explanation

Fig. 1 is the sealed four-row tapered roller bearing structural representation of cageless, the outer astragal spacer ring of inner ring.

Fig. 2 is the adjustment schematic diagram of the actual axial internal clearance of bearing.

Fig. 3 is the adjustment of the actual axial internal clearance of bearing and the instrumentation plan of h1, h2.

In Fig. 1,1-outer ring, 2-outer ring with double raceway, 3-inner ring, 4-roller, 5-retainer, 6-outer ring spacer, 7-Sealing shield ring, 8-internal diameter black box, 9-O RunddichtringO, 10-side seal assembly.

Embodiment

A simple and easy collocation method for sealed four-row tapered roller bearing axial internal clearance, the middle axial internal clearance of this kind of bearing is to guarantee by the face size of outer ring with double raceway, inner ring and outer, inner ring raceway size and inner ring rib size by analysis.First, consider the influence of end face in middle axial internal clearance, and according to the feasibility of technique, suitably compress the face size tolerance of outer ring with double raceway 2, outer ring with double raceway end face inter process processing dimension is C , and the end face inter process processing dimension of inner ring is become to B ; Secondly, should consider the impact of end face actual deviation value on raceway and rib size.Under normal circumstances, the diameter dimension of raceway is processed as standard piece according to benchmark sample circle, and standard sample circle face size is generally nominal nominal size, and deviation is " 0 ".Because actual ring face size deviation can not be " 0 ", the size deviation that therefore end face should be departed to " 0 " position is converted into the influence value to raceway, and adds and taken into account man-hour at raceway.Certainly, face size is the relation of 1:1 to the influence value of rib, do not need special conversion.By taking such technique processing method, the up-to-standard rate of middle axial internal clearance trap has reached more than 90%, has reduced and has produced upper unnecessary consumption, has improved manufacturing efficiency and quality of product.The 3806/409-XRS/HCC9 of now take is illustrated as example: the axial internal clearance of complete bearing is 0.50 ~ 0.65, and outer ring with double raceway size deviation is , angle is α=15o30 '; Inner ring raceway size deviation is , raceway angles is β=13o30 '; Inner ring raceway centre rib size deviation .If after inter process processing end face, at two cycle surface target values, be :-0.02, one of inner ring end face target value is :+0.03, another part is :+0.04, because end face is 1:2tg α on the ratio that affects of two outer ring raceways, the ratio that affects on inner ring raceway is 1:2tg β, thereby can calculate outer ring with double raceway actual dimension deviation and should be , on outer ring with double raceway is former, on the basis of lower deviation, respectively deduct the value that end face affects raceway: 0.02 * 2tg α=0.011.In like manner, can calculate end face scale value should be for the inner ring raceway actual dimension deviation of+0.03 deviation , on inner ring raceway is former, on the basis of lower deviation, respectively deduct the value that end face affects raceway: 0.03 * 2 tg β=0.014.Centre rib actual dimension deviation should be ; The inner ring raceway actual dimension deviation that end face scale value is+0.04 deviation should be , centre rib actual dimension deviation should be . although it is so when processing raceway and rib, increased end face to the trouble in its raceway and the calculating of rib influence value, but empirical tests, and actual effect is better, substantially accomplish the full interchange assemble of outer ring with double raceway and inner ring, and all can meet the requirement of qualified axial internal clearance.

Claims (1)

1. the simple and easy collocation method of a sealed four-row tapered roller bearing axial internal clearance, by analysis, without the axial internal clearance of two row raceways in the middle of cone spacer four-row tapered roller bearing, be to be determined by the face size of outer ring with double raceway, inner ring and outer, inner ring raceway size and inner ring rib size, it is characterized in that comprising following process step:

Step 1, first in product specification claimed range, the face size tolerance of outer ring with double raceway is compressed, simultaneously, consider the influence of inner ring end face in middle axial internal clearance, the end face inter process size deviation of inner ring is become to "+" deviation reverse with outer ring with double raceway, and its tolerance range is identical with two cycle surfaces;

Step 2, combination product design principle, takes into account end face actual deviation in lasso Grinding Process, to reach the requirement in design to the influence value of its outer ring with double raceway and inner ring raceway size, rib size.