Duplex bearing positioning fixture
The present invention relates to machining fixture technical field, in particular to a kind of duplex bearing positioning fixture.
Disk cover parts refer generally to the parts such as ring flange, end cap, transparent cover, and this kind of part mainly plays support, axially position
And sealing function, such part clamp generally use following several structures, one: positioning is swollen using spring expanding sleeve or oil pressure centering
Tightly；Two: the positioning of slide fit mandrel or centering taper hole rear end face compress；Three: end surface supporting uses non-yielding prop pad or oil pressure balance branch
It holds.The above structure has the disadvantage that the centering of 1, taper hole expansion set is unstable, using oil pressure structure complexity；2, slide fit mode has
Gap is unable to precision centering, centering low efficiency；3, end face non-yielding prop, which jumps part end, requires high and oil pressure balance structure is complicated
And failure rate height etc..
Summary of the invention
That the technical problem to be solved in the present invention is to provide a kind of structures is simple, positioning accuracy is high, rigidity is good and is able to achieve height
Imitate the duplex bearing positioning fixture of automation.
In order to solve the above-mentioned technical problem, the technical scheme is that a kind of duplex bearing positioning fixture, including clamp body,
First bearing oscillating bearing, the second bearing oscillating bearing, tapered sleeve, ball bearing, gland compress oscillating bearing, and mandrel is described
Tapered sleeve is arranged on clamp body by ball bearing, and the first bearing oscillating bearing and second supports oscillating bearing phase up and down
To setting, bearing oscillating bearing outer ring is constituted, the large cylindrical of the clamp body is convex spherical, is constituted in bearing oscillating bearing
Circle；The gland is connect by compressing oscillating bearing with mandrel, and the mandrel is equipped with as in compression oscillating bearing
The convex spherical of circle, the gland and mandrel abutting end are concave spherical surface, the concave spherical surface portion of the compression oscillating bearing and gland
Split-phase cooperation, collectively forms and compresses oscillating bearing outer ring.
Joint is used using oscillating bearing bearing, gland and mandrel connection using the positioning of ball bearing tapered sleeve, lower positioning surface
Bearing arrangement is floated using upper top pull-down and compresses to realize that the advantages that processing rigidity is big, precision is high realizes zero clearance positioning
And repetitive positioning accuracy is within 0.002.Lower positioning support face uses oscillating bearing, and it is balanced compensated to realize end face.
The ball bearing is equipped with door close to one end of gland.
The tapered sleeve lower end is equipped with reset spring.
It is additionally provided with positioning pin, for making tapered sleeve be located in clamp body.
The clamp body is equipped with broaching tool pawl far from spindle end.
By adopting the above technical scheme, taper hole and large end face need to be in vertical composite grindings when overcoming the processing of existing such part
It is processed on center to guarantee that the positioning accuracy of subsequent handling so as to cause defect at high cost, is bored in the present invention using ball bearing
Set positioning, lower positioning surface is balanced compensated using oscillating bearing, effectively reduces cost and simplifies clamp structure, and the present invention
Middle gland is connected with mandrel using oscillating bearing structure, floats compression using upper top pull-down to realize that processing rigidity is big, smart
The features such as high is spent, entire clamping process can not need manually to participate in, high degree of automation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of duplex bearing positioning fixture of the present invention；
Appended drawing reference: 1- clamp body；2- first supports oscillating bearing, and 3- second supports oscillating bearing, 4- reset spring, 5-
Tapered sleeve, 6- positioning pin, 7- ball bearing, 8- door, 9- gland, 10- compress oscillating bearing, 11- mandrel, 12- broaching tool pawl.
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.It should be noted that for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
The each embodiment of the present invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
A kind of duplex bearing positioning fixture, including clamp body 1, the first bearing oscillating bearing 2, the second bearing oscillating bearing 3, cone
Set 5, ball bearing 7, gland 9 compress oscillating bearing 10, mandrel 11, and tapered sleeve 5 is arranged on clamp body 1 by ball bearing 7,
First bearing oscillating bearing 2 and the second about 3 oscillating bearing of bearing are oppositely arranged, and constitute bearing oscillating bearing outer ring, clamp body 1
Large cylindrical be processed into convex spherical, constitute bearing oscillating bearing inner ring；Gland 9 is connected by compressing oscillating bearing 10 and mandrel 11
It connecing, 11 surface of mandrel processes convex spherical, and as the inner ring for compressing oscillating bearing, gland 9 and 11 abutting end of mandrel are concave spherical surface,
The concave spherical surface part for compressing oscillating bearing 10 and gland 9 matches, and collectively forms and compresses oscillating bearing outer ring.
It is connected using the positioning of ball bearing tapered sleeve, lower positioning surface using oscillating bearing bearing, gland and mandrel in the present invention
Using oscillating bearing structure, is floated using upper top pull-down and compress to realize that the advantages that processing rigidity is big, precision is high realizes zero
Gap positioning and repetitive positioning accuracy are within 0.002.Lower positioning support face uses oscillating bearing, realizes end face balance and mends
Ball bearing 7 is equipped with door 8 close to one end of gland 9, and 5 lower end of tapered sleeve is equipped with reset spring 4, accurate for part
Positioning, tapered sleeve 5 are located on clamp body 1 by positioning pin 6, in addition, clamp body 1 is equipped with broaching tool pawl 12 far from 11 end of mandrel.
Working principle: due to ball bearing zero clearance and almost make the characteristics of zero position error and under the action of positioning pin 6
Tapered sleeve 5 is accurately positioned on clamp body 1, and part is mounted on rear spindle 11 on tapered sleeve 5 and is automatically inserted into clamp body 1, passes through gland 9
It is accurately positioned under reset spring 4 and taper effect, continues the second bearing oscillating bearing 3 (upper outer ring) and part during pushing
Large end face reliable contacts.To make part became one with fixture, clamping process can be not required to manually last broaching tool pawl drop-down mandrel
It participates in, it is more preferable to realize automation clamping.
In conjunction with attached drawing, the embodiments of the present invention are described in detail above, but the present invention is not limited to described implementations
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen in protection scope of the present invention.