CN102501023A

CN102501023A - Compression molding method without action of inner rings for integral self-lubricating joint bearings

Info

Publication number: CN102501023A
Application number: CN2011103613530A
Authority: CN
Inventors: 陈继刚; 杨育林; 夏振伟
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2011-11-15
Filing date: 2011-11-15
Publication date: 2012-06-20
Anticipated expiration: 2031-11-15
Also published as: CN102501023B

Abstract

The invention relates to a compression molding method without action of inner rings for integral self-lubricating joint bearings. The compression molding method is characterized in that a self-lubricating layer is adhered on the inner surface of an outer ring blank, a bearing inner ring is placed in the outer ring blank adhered with the self-lubricating layer, a combination of the bearing inner ring and the outer ring blank is sleeved on a central spindle in a cavity of a lower mold, both a cavity of an upper mold and the cavity of the lower mode consist of conical surfaces and cylindrical holes, a chamfer matching with the conical surfaces of the cavities is arranged on a width end surface of the outer ring blank, a compression molding process is precisely controlled according to a pressing time-displacement curve, when the upper mold reaches a target position and an inner spherical surface is formed on the inner surface of the outer ring blank, compression molding is stopped, molds are opened, and a self-lubricating joint bearing meeting the requirement on the backlash is obtained. The compression molding method solves the problem that a self-lubricating layer of an integral self-lubricating joint bearing is damaged by existing forming process, a forming process of the inner surface of an outer ring of the bearing and the backlash of the bearing are controllable, and the bearing manufactured by the aid of the process has the advantages of long service life and high reliability.

Description

The monoblock type self-lubricating knuckle bearing does not have inner ring effect die forming method

Technical field

The present invention relates to bearing and make field, particularly a kind of die forming method of oscillating bearing.

Background technology

At present, known self-lubricating knuckle bearing is made up of the inner ring of a band spherical outside surface, the outer ring and the self-lubricating layer of a band Internal Spherical Surface.Version by the outer ring is divided into: single seam formula, double slit formula, two half formula and monoblock type, the self-lubricating layer of Internal Spherical Surface is the key function structure of bearing in the outer ring, and not damaged is arranged in the manufacturing, and its performance is played decisive role.Though the manufacturing of single seam formula self-lubricating knuckle bearing inner surface is simple; Can inner ring directly be pressed in the outer ring of cracking during assembling; But very easily cause the damage of inner surface self-lubricating layer and inner ring outer surface, in addition, in the use; Because of the unbalance stress that cracks and cause, bearing life and reliability are reduced; Double slit formula self-lubricating knuckle bearing, though in making to the lubricating layer not damaged, outer ring and self-lubricating layer surface are subdivisions, in use, the structure of non-integral makes inhomogeneous, the discontinuity in gap, reliability is lower, the assembly structure relative complex; Two half formula self-lubricating knuckle bearings are connected two semi outer rings by some bolts, complex structure, matching requirements height; Two semi outer rings and self-lubricating layer also are the structures of non-integral, inhomogeneous, the discontinuity in gap, and; This structure is not suitable for small-sized self-lubricating knuckle bearing, and reliability is low.

The outer ring of monoblock type self-lubricating knuckle bearing and self-lubricating layer are monolithic construction, and outer ring and inner ring are simple in structure, and the gap condition meets the requirement of finished product bearing; Reliability is high in the use, existing manufacturing technology, and the outer ring is to be formed on the inner ring with the forging method envelope; When the outer ring is shaped, at first inner ring is enclosed within on the mandrel, again the outer ring blank is enclosed within outside the inner ring; Suppress the outer ring then, make on the spherical outside surface of inner surface locking inner ring, then the machined outer ring; The magnitude of interference [" bearing " 1973, (6)] through between control mandrel and inner ring makes to produce the gap between self-lubricating layer and inner ring outer surface; Be the self-lubricating knuckle bearing play, in monoblock type self-lubricating knuckle bearing manufacture process, for the Internal Spherical Surface that forms the outer ring with meet the bearing clearance that the finished product bearing requires; Self-lubricating layer stands twice violent extruding heterogeneous and distortion, very easily causes the conquassation damage, and the finished product rate is not high, the self-lubricating layer reliability is not high; Therefore, in the monoblock type self-lubricating knuckle bearing was made, the exploitation of no inner ring effect forming technique was necessary.

Summary of the invention

The objective of the invention is in order to solve the above-mentioned technical problem of existing in prior technology; To the monoblock type self-lubricating knuckle bearing, provide a kind of in manufacture process between outer ring blank inner surface and inner ring spherical outside surface the monoblock type self-lubricating knuckle bearing of no pressure effect do not have inner ring effect die forming method.

The object of the invention can be realized through following technical proposals:

A kind of monoblock type self-lubricating knuckle bearing that comprises bearing inner race, bearing outer ring and stick to the self-lubricating layer of bearing outer ring inner surface is characterized in that: on request, the outer ring blank is carried out the processing of car mill; Self-lubricating layer is affixed on outer ring blank inner surface, bearing inner race is placed the outer ring blank that is stained with self-lubricating layer, and this integral body is enclosed within on the mandrel in the bed die die cavity; The die cavity of mold and bed die is made up of the equal conical surface and cylindrical hole; Mold die cavity cone angle and bed die die cavity cone angle are between 20 ° ~ 70 °, and outer ring blank width end face has the chamfered edge that matches with the die cavity conical surface, and chamfered edge is of a size of

Figure 2011103613530100002DEST_PATH_IMAGE001

; According to press time-displacement curve; Accurately the control mold process treats that mold arrives the target location, when outer ring blank inner surface becomes Internal Spherical Surface; Stop mold pressing; Mould opens, and obtains to meet the self-lubricating knuckle bearing of play requirement, and is last; Through to its end face and the processing of outer surface car mill, obtain the self-lubricating knuckle bearing finished product.

In the said manufacturing process, the shaping and the assembling that are stained with the solid box inner surface of self-lubricating layer are carried out simultaneously, and in bearing outer ring shaping and assembling process, the bearing inner race spherical outside surface are not produced the locking squeezing action.

The present invention compared with prior art has the following advantages: the invention solves the problem that existing monoblock type self-lubricating knuckle bearing outer ring is shaped and assembling influences self-lubricating layer; In manufacture process; No locking and squeezing action between bearing outer ring and bearing inner race can not cause damage to self-lubricating layer, can form the play that meets the requirement of finished product bearing; The bearing of manufacturing has long service life, high reliability features; Simultaneously, in process of production, this manufacturing approach is largely increased the bearing completed products rate.

Description of drawings

Fig. 1 is a mould pressing process sketch map of the present invention.

Fig. 2 is a bearing outer ring change in shape sketch map of the present invention;

Fig. 3 is press time-displacement curve.

The specific embodiment

According to accompanying drawing 1,2, shown in 3; The outer ring blank 2 of monoblock type self-lubricating knuckle bearing is the annular cylinder; By the requirement of different product,, produce the outer ring blank through Vehicle Processing to the outer ring blank; With the processing of polishing of outer ring blank inner surface, on the outer ring blank inner surface after the polishing, adhere to self-lubricating layer 3.Place the outer ring blank that is stained with self-lubricating layer to form the bearing base of an integral body bearing inner race 4; The die cavity of mold 1 and bed die 7 is the conical surface; Have cylindrical hole in the middle of the mould; Mold die cavity cone angle 9 and bed die die cavity cone angle 10 are between 20 ° ~ 70 °; The integral bearing base is enclosed within on the mandrel 5 in the bed die die cavity; Outer ring blank width end face has the chamfered edge that matches with the die cavity conical surface; Chamfered edge is of a size of

, has below the mandrel spring 6 to support, and this spring can make above-mentioned bearing inner race in pressing process, have certain amount of moving down with the outer ring blank.Mold is fixed on the movable chopping block bottom of press, and bed die is fixed under the press on the chopping block.Through formulating time-displacement curve, control the speed that presses down and the drafts of mold, and time-displacement curve is adjustable.When mold arrived the target location, bearing outer ring blank inner surface just in time became an Internal Spherical Surface, at this moment; Outer ring blank inner surface and bearing inner race outer surface do not have the locking squeezing action, and the gap between outer ring blank inner surface and the bearing inner race outer surface satisfies the play requirement of monoblock type self-lubricating knuckle bearing, stop mold pressing; Mould opens; Take out the bearing after suppressing, last, by bearing outer ring width and external diameter requirement; Bearing after the compacting is carried out the processing of car mill, and final the acquisition meets the play requirement and satisfies the self-lubricating knuckle bearing that appearance and size requires.

Claims

1. a monoblock type self-lubricating knuckle bearing does not have inner ring effect die forming method, it is characterized in that: self-lubricating layer is affixed on outer ring blank inner surface, bearing inner race is placed the outer ring blank that is stained with self-lubricating layer; And this integral body is enclosed within on the mandrel in the bed die die cavity; The die cavity of mold and bed die is formed by the conical surface and cylindrical hole, and outer ring blank width end face has the chamfered edge that matches with the die cavity conical surface, and chamfered edge is of a size of

Figure 2011103613530100001DEST_PATH_IMAGE001

2. monoblock type self-lubricating knuckle bearing according to claim 1 does not have inner ring effect die forming method; It is characterized in that: the shaping and the assembling that are stained with the solid box inner surface of self-lubricating layer are carried out simultaneously; And in bearing outer ring shaping and assembling process, the bearing inner race spherical outside surface is not produced the locking squeezing action.

3. monoblock type self-lubricating knuckle bearing according to claim 1 does not have inner ring effect die forming method, it is characterized in that: the outer ring blank is the annular cylinder.

4. monoblock type self-lubricating knuckle bearing according to claim 1 does not have inner ring effect die forming method, it is characterized in that: mold die cavity cone angle and bed die die cavity cone angle are all between 20 ° ~ 70 °.

5. monoblock type self-lubricating knuckle bearing according to claim 1 does not have inner ring effect die forming method, it is characterized in that: mold is fixed on the movable chopping block bottom of press, and bed die is fixed under the press on the chopping block.

6. monoblock type self-lubricating knuckle bearing according to claim 1 does not have inner ring effect die forming method, it is characterized in that: the time-displacement curve that mold is depressed is adjustable.