CN2571519Y - Punching die for dust-proof cover of bearing - Google Patents

Abstract

The utility model relates to a punching die of a dustproof cover of a bearing. Primarily, a positioning core is arranged on the downward surface of the base body of the punching die, the upper end of the positioning core is connected with the punching die, the central line of the positioning core is same to that of the punching die, and the outer diameter corresponds to the diameter of the inner ring of the bearing. A bus line of the middle cone of a pressure ring is coincident with the tangent line of the first contact point of the die and a curling edge. An inner working surface between the positioning core and the pressure ring is a ring surface corresponding to the plane surface of a dustproof cover. The top of the handle end of the die forms a spherical surface. A product processed by the utility model has the advantages of firm combination and no deformation, and the phenomenon that the dustproof cover rubs the surface of the inner ring can not occur when the bearing runs. The qualification rate of quality can reach more than 99 percent.

Description

The punching press mold of bearing dustproof cover

Technical field the utility model relates to a kind of frock of machining bearing.

The background technology bearing dustproof cover is provided in a side of the annular slab between the bearing enclose, by the punching press mold dust cap crimping is expressed in the dust cap alveolus of outer ring when the assembling bearing, by interference fits dust cap is fixed on the bearing.The structure of dust cap punching press mold is at present: it has diameter to equal the mold matrix in bearing outer ring tooth footpath, and its top is provided with perpendicular mold handle.Outer working face on its end top of pressure ring on the matrix periphery is made up of middle cone and outer two the short horizontal anchor rings of interior length.The working face corresponding with dust cap is provided with groove discontinuously in the pressure ring.Its weak point is: the relative position between mold and dust cap and bearing is only determined with operator's sense organ, the unavoidable error that produces, make dust cap off-centre, the working face and the dust cap crimping of pressure ring are not realized best fit simultaneously, its result can cause: in the alveolus of dust cap crimping punching press less than the outer ring, dust cap is not in conjunction with firm, and dust cap caves in or exceeds end face, and the qualification rate of product only is 10%.These underproof products are in operation, and the dust cap inner ring outer surface that can rub makes bearing early damage occur, reduction of service life, and the groove on the mold working face in addition, difficulty of processing is big.

Summary of the invention the utility model mainly provides a kind of mold that can guarantee to reach after the dust cap punching press definite quality standard-required.The utility model is on the basis of existing punching press mold, sets up the location core, and adjusts its working face tapering corresponding with the dust cap crimping.The utility model has a disc matrix, and its top is provided with perpendicular cylindrical mold handle, the concentricity line of this handle and matrix.Preferably the top of handle is a sphere, so that this mold is when being subjected to punching press, working face is stressed everywhere evenly.Be provided with upper end external diameter coupled and line concentricity with it and the corresponding location of bearing inner race diameter core on the downward face of matrix, it can be a cylinder, but annulus preferably, it can alleviate the deadweight of mold.Diameter equals the mold matrix in bearing outer ring tooth footpath, establish pressure ring on its periphery to lower convexity, the end top of this pressure ring is the outer working face corresponding with the dust cap crimping, this outer working face is made up of middle cone and outer two the short horizontal anchor rings of interior length, and the tangent line of cone element and mold and the first contact of crimping coincides.The location core is the anchor ring corresponding with the dust cap plane with inner working face between the pressure ring.

When dust cap is installed on bearing, dust cap is placed on the bearing face, then the location core of mold is inserted in the inner ring of the centre bore of dust cap and bearing, make mold, dust cap, bearing three concentric.Working face is pressed onto the crimping of dust cap in the dust cap alveolus of outer ring outside the mold when punching press, and inner working face then covers the dust cap plane between the Internal and external cycle.

The utility model has following advantage compared to existing technology: the utility model can guarantee that mold, dust cap, bearing three are concentric, accurate positioning, the best fit of each working face and dust cap, and the stress equalization of dust cap each point, therefore the product that processes is in conjunction with firm, indeformable, and bearing is in operation and the phenomenon of dust cap friction inner peripheral surface can not occur, and up-to-standard rate reaches more than 99%.

Description of drawings

Fig. 1 is that the utility model master looks generalized section.

Fig. 2 is the utility model user mode partial schematic diagram.

The specific embodiment is looked in the schematic diagram the master of the punching press mold of bearing dustproof cover shown in Figure 1, and plate-shaped base body 1 top is provided with perpendicular mold handle 2, itself and the concentricity line of matrix, and the top is a sphere.The downward face of matrix is provided with upper end external diameter and the corresponding annular of bearing inner race diameter coupled and line concentricity with it and locatees core 3.Diameter equals the mold matrix in bearing outer ring tooth footpath, outer working face 4 on the pressure ring end top on its periphery is made up of middle cone and outer two the short horizontal anchor rings of interior length, and the tangent line of the bus of the conical surface and mold and dust cap crimping 5 first contacts coincides as shown in Figure 2.The location core is the anchor ring corresponding with the dust cap plane with inner working face 6 between the pressure ring.

Claims (3)

1, a kind of punching press mold of bearing dustproof cover, its diameter equals the mold matrix in bearing outer ring tooth footpath, top is provided with perpendicular mold handle, the concentricity line of this handle and matrix, outer working face on its end top of pressure ring on the matrix periphery is made up of middle cone and outer two the short horizontal anchor rings of interior length, it is characterized in that: the downward face of matrix is provided with the external diameter and the corresponding location of the bearing inner race diameter core of the coupled and line concentricity with it in upper end, the bus of pressure ring middle cone and mold and the crimping just tangent line of contact coincide, and the location core is the anchor ring corresponding with the dust cap plane with inner working face between the pressure ring.

2, the punching press mold of bearing dustproof cover according to claim 1 is characterized in that: the location core is an annulus.

3, the punching press mold of bearing dustproof cover according to claim 1 and 2 is characterized in that: mold handle end top is sphere.

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