CN201385100Y

CN201385100Y - Improved bearing inner ring blank and forging die

Info

Publication number: CN201385100Y
Application number: CN200920089215U
Authority: CN
Inventors: 郝雪玲; 杜福贵; 高双印; 刘俊生; 郭营民; 花聚东
Original assignee: Luoyang Bearing Science and Technology Co Ltd
Current assignee: Luoyang Bearing Science and Technology Co Ltd
Priority date: 2009-03-18
Filing date: 2009-03-18
Publication date: 2010-01-20
Anticipated expiration: 2019-03-18

Abstract

The utility model relates to an improved bearing inner ring blank and a forging die, wherein the improved bearing inner ring blank (5) designs a contact surface when a punch is forged and pressed into a circular cone boss, the minimum outer diameter of which is larger than the diameter of an effective forging and pressing shaft at the end part of the punch; the improved forging die comprises the punch (1) and a lower mandrel (3); the length of the effective forging and pressing shaft at the end part of the punch is equal to the actual depth of an inner bore of a formed bearing inner ring blank (4) when in forging; the outer diameter of an effective forging and pressing circular end surface except a punch extrusion shaft is no more than the outer diameter of the formed bearing inner ring blank or no more than the inner diameter of a concave die (2); the width of the outer diameter of the effective forging and pressing circular end surface of the punch is no more than the depth of a concave table at the upper part of the concave die; and the contact surface of the lower mandrel and the formed bearing inner ring blank is designed into the circular cone boss, the maximum outer diameter of which is no more than the outer diameter of the formed bearing inner ring blank. The improved bearing inner ring blank and the forging die have simple improved structure, can thoroughly eliminate a metal deformation deal zone and be full of the whole concave die cavity, do not form a large round corner, reduce the rejection rate, and have good use effect.

Description

A kind of improved bearing inner race blank and forging mold

Technical field

The utility model belongs to technical field of mold, especially a kind of improved bearing inner race blank and forging mold.

Background technology

Bearing inner race forges and adopts the forcing press forge moulding technology usually, has provided concrete mould structure in " bearing smithcraft " that the bearing industry teaching material editing committee writes.

Realize in the actual production:

1, there is certain defective in the structural design of the drift in the mould, lower push rod, causes effective contact area minimizing when forging, and causes bearing inner race flow of metal dead band excessive.

2, for bearing inner race particularly for the conical bearing inner ring, because it is complex-shaped, during forging molding, the blank upper surface only has part metals to participate in distortion, flow of metal occurs over just the part that contacts with drift, and drift is during with slide block down, and the deformed area metal is not moved as rigidity downwards by metal downward restraining function in deformed area on the one hand, on the other hand because the supporting role of die consequently forms big filleted corner in the blank upper surface.In like manner, form big bull nose at lower push rod and die intersection.Fillet is excessive, exceeds production engineering specifications, and following process still can not be eliminated, and causes the workpiece waste product.

Summary of the invention

For addressing the above problem, the utility model has designed a kind of improved bearing inner race blank and forging mold, can eliminate above-mentioned weak point, reaches technological requirement, reduces percent defective.

For achieving the above object, the utility model adopts following technical scheme:

Described a kind of improved bearing inner race blank and forging mold, its improved bearing inner race blank are that the contact-making surface design when drift is forged and pressed has conical boss, and the minimum outer diameter＞nose of punch of this conical boss effectively forges and presses shaft diameter; Its improved forging mold comprises drift and lower push rod, actual grade when effective forging and pressing shaft length of described nose of punch=moulding bearing inner race blank endoporus forges, effective forging and pressing nose circle face external diameter≤moulding bearing inner race blank external diameter except the drift extrusion axis, or≤the interior warp of die, described drift effectively forges and presses the degree of depth of the width≤die top concave station of nose circle face external diameter; The contact-making surface design of described lower push rod and moulding bearing inner race blank has conical boss, the maximum outside diameter of this conical boss≤moulding bearing inner race blank external diameter.

Because adopt aforesaid technical scheme, the utility model produces following good effect:

1, improvement of the present utility model is simple in structure, and effect is obvious.

2, drift and push rod are designed to the forging mold structure of two-way moulding, make the each several part of bearing inner race blank metal when forging all participate in distortion, eliminated the flow of metal dead band, metal is easy to be full of whole concave die cavity, it is uneven and can not be full of die cavity and the big fillet that forms to have overcome bearing inner race metal deformation when forging, and has reduced percent defective.

Description of drawings

Fig. 1 is the utility model original state structural representation;

Fig. 2 is the utility model status architecture schematic diagram finally.

Among the above-mentioned figure: the 1-drift; The 2-die; The 3-lower push rod; 4-moulding bearing inner race blank; The improved bearing inner race blank of 5-.

The specific embodiment

In conjunction with Fig. 1,2, a kind of improved bearing inner race blank of the present utility model and forging mold, its improved bearing inner race blank 5 is that the contact-making surface design during with drift 1 forging and pressing has conical boss, and shaft diameter is is effectively forged and pressed in minimum outer diameter＞drift 1 end of this conical boss; Its improved forging mold comprises drift 1 and lower push rod 3, actual grade when effective forging and pressing shaft length of described drift 1 end=moulding bearing inner race blank 4 endoporus forge, effective forging and pressing nose circle face external diameter≤moulding bearing inner race blank 4 external diameters except drift 1 extrusion axis, or≤die 2 interior warps, described drift 1 is the degree of depth of width≤die 2 top concave stations of forging and pressing nose circle face external diameter effectively; Described lower push rod 3 has conical boss, the maximum outside diameter of this conical boss≤moulding bearing inner race blank 4 external diameters with the contact-making surface design of moulding bearing inner race blank 4.

The utility model is after taking the said structure design, and the course of work of the bearing inner race flow of metal two-way moulding in zone was as follows when it realized forging:

The lower push rod 3 that will have conical boss is installed in the bottom of die 2, die 2 is fixed on the below of drift 1, the improved bearing inner race blank 5 that will have conical boss is put into die 2, the conical boss of wherein improved bearing inner race blank 5 is upwards over against drift 1, in the drift 1 downward forging and pressing process, the conical boss of improved bearing inner race blank 5 has increased its upper deformation space, effective forging and pressing nose circle face of drift 1 applies downward pressure to improved bearing inner race blank 5 again simultaneously, and the conical boss on lower push rod 3 tops makes the bottom of improved bearing inner race blank 5 form the flow of metal space, facilitate improved bearing inner race blank 5 on, the lower part becomes the flow of metal zone simultaneously, it is described two-way moulding, flow of metal is full of die 2 die cavities, forge into qualified moulding bearing inner race blank 4, drift 1 upwards lifts then, lower push rod 3 ejects 2, one forging forming processes of die with moulding bearing inner race blank 4 and finishes.

The two-way moulding of flow of metal in the time of realizing that improved bearing inner race blank 5 material forge after the structural design change of the utility model with drift 1 and push rod 3, especially in later stage of flow of metal, make the each several part of improved bearing inner race blank 5 metals all participate in distortion, thoroughly eliminate the flow of metal dead band and be full of whole die 2 die cavities, overcome existing bearing inner race blank metal deformation inequality when forging and to be full of the big fillet that die 2 die cavities form, reduced moulding bearing inner race blank 4 percent defectives, result of use is good.

The utility model is suitable for the forging production of any bearing inner race, the forging production of more suitable conical bearing inner ring.

Claims

1, a kind of improved bearing inner race blank and forging mold, it is characterized in that: its improved bearing inner race blank (5) is that the contact-making surface design when drift (1) is forged and pressed has conical boss, and shaft diameter is is effectively forged and pressed in the minimum outer diameter＞drift of this conical boss (1) end; Its improved forging mold comprises drift (1) and lower push rod (3), actual grade when effective forging and pressing shaft length of described drift (1) end=moulding bearing inner race blank (4) endoporus forges, effective forging and pressing nose circle face external diameter≤moulding bearing inner race blank (4) external diameter except drift (1) extrusion axis, or≤the interior warp of die (2), described drift (1) effectively forges and presses the degree of depth of width≤die (2) top concave station of nose circle face external diameter; Described lower push rod (3) has conical boss, the maximum outside diameter of this conical boss≤moulding bearing inner race blank (4) external diameter with the contact-making surface design of moulding bearing inner race blank (4).