CN1085296A

CN1085296A - Rolling bearing made of new material and autofrettage thereof

Info

Publication number: CN1085296A
Application number: CN 92111222
Authority: CN
Inventors: 张恒
Original assignee: LUOYANG POLYTECHNICAL COLLEGE
Current assignee: LUOYANG POLYTECHNICAL COLLEGE
Priority date: 1992-10-08
Filing date: 1992-10-08
Publication date: 1994-04-13

Abstract

A kind of rolling bearing made of new material and manufacture method thereof, in it or outer collar be composited through injection moulding or RRIM technology by Steel Thin-Wall lining and mixed fibre (short glass fiber, steel fiber or metallic dust mix)/polymer composites of band moulding raceway.The load capacity of rolling bearing made of new material is about 85% of a gauge steel bearing of the same race, and is bigger 7～8 times than plastic bearing, has good vibration damping, noise reduction, and the velocity limit height.This manufacture method can be used in the manufacturing of radial bearing, thrust-bearing or radial thrust bearing lasso.

Description

Rolling bearing made of new material and autofrettage thereof

The present invention relates to a kind of method of making the inside and outside lasso of rolling bearing (comprising radial bearing, radial thrust bearing and thrust-bearing) that combines with Bearing Steel, mixed fibre 1 polymer composites.

The light of rolling bearing is one of important development trend of bearing.Make rolling bearing except can alleviating bearing weight with engineering plastics, have also that cost is low, corrosion-resistant, an advantage of selflubricating, vibration damping and noise reduction.But plastics rolling bearing load capacity low (have only usually steel bearing about 1/10th), limit speed is low, precision is low, material thermal conductivity can be poor, expand with heat and contract with cold big (approximately be steel about ten times), above-mentioned drawbacks limit the application of plastics rolling bearings.It is in light weight for rolling bearing is possessed simultaneously, load capacity is big, the precision height, the characteristics that vibration damping and noise are low, lasso and rolling element can still adopt Bearing Steel manufacturing retainer then to adopt glass/nylon or cotton fibre/phenolic composite manufacturing, perhaps integration engineering plastics inserts (Glass-flbre relnforced polyamlde cages Thelr resistance to temperatures and Lubricants, Ball and Roller Bearing Engineering.Industrlal Engineering(FAG) 1990-501 around the steel bearing outside collar).Only retainer is changed or composite material weight reduction and anti noise not obvious, the method for integration engineering plastics inserts is only applicable to resemble special circumstances such as automobile tension pulley, clutch bearing around the steel bearing outside collar, lacks versatility.

The objective of the invention is to seek a kind of rolling bearing inside race or outer collar with new structure, make rolling bearing both have steel bearing accuracy height, load capacity is big, limit speed is high advantage, have in light weight, the vibration damping and the low advantage of noise of plastics rolling bearing again.

Realize that principle of the present invention is to adopt the composite structure of the Steel Thin-Wall lining 1 of band moulding raceway and mixed fibre/polymer composite layer 2 to constitute the inside race or the outer collar of rolling bearing.Fig. 1 is the rolling bearing made of new material structural representation.During bearing working, load is born (Fig. 1 (a)) or is born (Fig. 1 (b)) by the steel external bushing of inside race by the Steel Lining cover of outer collar.

The inner and outer ring of bearing can be by the GCr of band moulding raceway ₁₅Bearing Steel thin-wall bush and glass, Steel Fibre mix/and the thermoplastic polymer composite material layer is composited.

The manufacture method of rolling bearing made of new material lasso is as follows, with the outer collar is example: at first by downcutting a lining (Fig. 2 (a)) on internal diameter and the corresponding thin-wall steel tube of outer collar internal diameter, adopting rubber elastomer then is pressure transmission medium, compression and moulding in the die of opening up and down forms bearing race (Fig. 2 (b)); Neck bush after the moulding is carried out Quenching Treatment.By downcutting the external bushing blank on external diameter and the corresponding thin-wall steel tube of outer collar external diameter, neck bush and external bushing after quenching are inserted the corresponding position of injection mould, adopt injection moulding or RRIM method between interior external bushing, to inject mixed fibre/polymer composites, they are bonded together (Fig. 3).Grinding lasso Wai Yuan, interior garden and raceway are assembled into rolling bearing made of new material.For inside race, manufacture process and outer collar are similar.

The advantage of rolling bearing made of new material is the main feature that possesses steel bearing and plastic bearing simultaneously.The load capacity of this bearing is about about 85% of same specification steel bearing, and bigger 7～8 times than plastic bearing, machining accuracy and dimensional stability are near the steel bearing.Owing to added steel fiber or metallic dust in the hybrid composite layer, its thermal conductivity increases greatly.Viscoelastic material specific volume distortion when shear deformation has higher damping.Shear deformation mainly takes place in the composite material interlayer of lasso when shaft strength, damping effect is very high.Several interface feature parameters to parameter and it and matrix of the chopped strand in the composite layer have been passed through numerical optimization, have further improved the damping factor of material.The new material bearing has good vibration damping, noise reduction with respect to the steel bearing, has with respect to the plastics rolling bearing that load capacity is big, precision is high, dimensional stability is good, versatility reaches the good advantage of heat conduction well.Under the condition of automatic production, the manufacture cost of new material bearing is suitable with the steel bearing.

Description of drawings is as follows:

Fig. 1 is the rolling bearing made of new material structural representation.Wherein:

The Bearing Steel thin-wall bush of 1-band moulding raceway

2-mixed fibre/polymer composite layer

Fig. 2 is an outer collar blank neck bush raceway molding process schematic representation.

Fig. 3 is an outer collar hybrid composite interlayer injection molding process schematic representation.

Embodiments of the invention, select for use single-row radial ball bearing (model 203) outer collar manufacturing process to be described as follows: by internal diameter is φ 35, the GCr of wall thickness 0.6mm ₁₅Cut down the lining (Fig. 2 (a)) of wide 12mm on the bearing steel pipe, insert in the bearing race molding concave die, fill in rubber core, pressurization (8.5 tons of pressure), pressure makes lining be pressed towards die die wall shape or bearing race (Fig. 2 (b)) by the rubber elastomer transmission.After pressure was removed, elastic caoutchouc recovered distortion, and last lower open die takes out the lining after the moulding, and 800 ℃ of quenchings make hardness reach HRc62.At external diameter φ 40, cut down the wide lining of 12mm that is on the 45# steel pipe of wall thickness 0.5mm, former and later two linings are inserted relevant position in the injection mould, (0.8mm is long to add glass, diameter 0.008mm, fertile blue coupling agent treatment) and steel fibre (0.5mm is long, diameter 0.05mm) mixture.Inject isocyanates and the polyatomic alcohol polybasic alcohol mixed solution that mixed by 1: 1 behind the matched moulds, obtain glass and steel fibre after the reaction and mix/the polyurethane composite material interlayer.Mould structure is seen Fig. 3.Press the grinding process mill ring face of plain carbon steel bearing, inside and outside footpath and raceway assemble then, promptly obtain the rolling bearing made of new material of 203 models.

For the bearing of different model, the wall thickness of steel pipe, the length of fiber, diameter can be different.

Claims

1, the manufacture method of the inside and outside lasso of a kind of rolling bearing made of new material, it is characterized in that by behind the intercepting blank on the thin-wall steel tube, utilize Elastic medium to be the propagation of pressure media, on recessed (protruding) mould, be pressed into the thin-wall bush of raceway shape, lining is quenched, adopt injection moulding or RRIM technology between interior external bushing, to inject mixed fibre/polymer composites then and make it to bond together formation steel, hybrid composite interlayer lasso.

2, a kind of rolling bearing made of new material is characterized in that interior or outer collar is composited by Steel Thin-Wall lining 1 and mixed fibre 1 polymer composite layer 2 of being with the moulding raceway.

3, rolling bearing made of new material according to claim 2 is characterized in that interior or outer collar mixes 1 thermoplastic polymer composite material layer by the GCr15 Bearing Steel thin-wall bush of band moulding raceway and glass, Steel Fibre and is composited.