CN102672076A

CN102672076A - Device for necking grooved self-locking nut

Info

Publication number: CN102672076A
Application number: CN2012101293458A
Authority: CN
Inventors: 虞玉华; 王四华; 梁迎辉; 胡庆宽
Original assignee: Henan Aerospace Precision Machining Co Ltd
Current assignee: Henan Aerospace Precision Machining Co Ltd
Priority date: 2012-04-28
Filing date: 2012-04-28
Publication date: 2012-09-19
Anticipated expiration: 2032-04-28
Also published as: CN102672076B

Abstract

The invention relates to a device for necking a grooved self-locking nut. Raised press claws which are arranged on the circumference of a columnar main body apply extrusion forces at the part of the bottom of a necking groove, which is close to the center of the grooved self-locking nut, to enable the connecting end of the grooved self-locking nut to turn towards the groove mouth end in the radial direction of the grooved self-locking nut, so that the inner bore of the connecting end of the grooved self-locking nut turn is machined to be a tapered hole structure, that is, the internal thread of the connecting end of the grooved self-locking nut turn has a self-locking structure. The device solves the problem that in the prior art, the necking operation of a grooved self-locking nut free of internal thread at the groove part is difficult, and the self-locking structure is not liable to crack during the use of the grooved self-locking nut, so that the service life of the grooved self-locking nut is increased, and the service performance of the grooved self-locking nut is improved.

Description

A kind of closing device of the self-locking nut of slotting

Technical field

The self-locking nut processing technique field that the present invention relates to slot relates in particular to a kind of closing device of the self-locking nut of slotting.

Background technology

At present, along with the develop rapidly of aerospaceplane, it is increasingly high to connect the condition of work requirement between the matrix of the engine of aerospaceplane, and the fluting self-locking nut is well positioned to meet the connection request between some matrix of engine.

Whether common fluting self-locking nut is processed with internal thread according to the fluting place is divided into two kinds; Be processed with the fluting self-locking nut of female thread structure for the fluting place; Close up through the groove width distortion cross-notching self-locking thread that makes the fluting place and to reach the purpose of self-locking; This kind closing in mode usually can make the deformation position of fluting self-locking nut crack at work, thereby fluting was lost efficacy from the self-locking property of making nut, has reduced the service life of fluting self-locking nut; The fluting self-locking nut 1 (extremely shown in Figure 3) that does not have female thread structure for slotting position like Fig. 1; This fluting self-locking nut 1 is made up of notch end 1-1 that offers several closing in grooves 1-4 and the link 1-2 relative with notch end 1-1; Wherein, Close up and be provided with closing in pawl 1-5 between adjacent two the closing in groove 1-4 that hold 1-1; Closing in groove 1-4 has the groove bottom 1-3 that is between notch end 1-1 and the link 1-2, and in the above-mentioned closing in mode of employing this fluting self-locking nut 1 being closed up adds man-hour, though the variation of the groove width of the notch end 1-1 of this fluting self-locking nut 1 can make the notch end produce throat structure; But owing to do not have the machining internal thread structure on the inwall of this reducing; Therefore can not make this fluting self-locking nut 1 have the function of self-locking, thereby make the closing in difficulty of processing of this fluting self-locking nut 1 strengthen, improve the manufacturing cost of product.

Summary of the invention

The invention provides a kind of closing device of the self-locking nut of slotting, be intended to solve the big problem of fluting self-locking nut crimping difficulty of processing that fluting place in the prior art does not have female thread structure.

The technical scheme of the closing device of fluting self-locking nut of the present invention is following:

A kind of closing device of the self-locking nut of slotting; Comprise the columnar body that is used for inserting the passage that the closing in pawl surrounds, convex with the closing in groove that is used to insert fluting self-locking nut workpiece on the periphery of described columnar body and apply the paw of extruding force to the part near fluting self-locking nut workpiece centre of the groove bottom of closing in groove from the notch end of fluting self-locking nut workpiece.

Described paw has at least two, and evenly is laid on the periphery of columnar body.

Described columnar body is cylinder or hexahedron.

Being used for of described paw applies end from extruding force to groove bottom is defined as pressed end, the circular fillet surface transition through processing between two two sides between the end face of described pressed end and the side.

The paw that is convexly equipped with on the periphery of the present invention through columnar body applies extruding force to the part near fluting self-locking nut workpiece centre of the groove bottom of closing in groove; So that the link of fluting self-locking nut workpiece radially overturns to the notch end around it; Thereby the endoporus of the link of feasible fluting self-locking nut workpiece is processed into the taper hole structure; The internal thread of the link of just feasible fluting self-locking nut workpiece forms self-locking structure; And then solved the fluting self-locking nut crimping difficulty of processing big problem that fluting place in the prior art does not have female thread structure; And this self-locking structure can not crack in the use of fluting self-locking nut, thereby has prolonged the service life of fluting self-locking nut, has improved the serviceability of fluting self-locking nut.

Description of drawings

Fig. 1 is the perspective view of hexagonal fluting self-locking nut workpiece;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is that the A-A of Fig. 2 is to cutaway view;

Fig. 4 is the operation principle sketch map of embodiments of the invention;

Fig. 5 is the perspective view of embodiments of the invention;

Fig. 6 is the front view of Fig. 5;

Fig. 7 is the left view of Fig. 6.

The specific embodiment

The embodiment of the closing device of fluting self-locking nut of the present invention: to shown in Figure 7, three paws 3 that evenly are convexly equipped with on the periphery of this closing device by columnar body 2 and columnar body 1 constitute like Fig. 1, and wherein, columnar body 2 is a cylinder; Paw 3 has the pressed end 3-1 that is used for applying to the groove bottom 1-3 of the notch end 1-1 of fluting self-locking nut workpiece 1 and the annular between the link 1-2 extruding force; Circular fillet surface transition through processing between two two sides between the end face of this pressed end 3-1 and the side, and the diameter of the minimum inscribed circle of the bottom of the circular fillet surface of the pressed end 3-1 of three paws 3 is greater than the internal diameter of the screwed hole of the link 1-2 of fluting self-locking nut workpiece 1.

The present invention in use; Earlier with on the punching press end of columnar body 2 away from the forcing press of the end installation of the pressed end 3-1 of paw 3; And the pressed end 3-1 that makes paw 3 exposes from the end face of the punching press end of forcing press; To slot then self-locking nut workpiece 1 through its notch end 1-1 inserting on this closing device, the pressed end 3-1 of paw 3 is inserted in the groove of notch end 1-1 of fluting self-locking nut workpiece 1, then the starting pressure machine; Apply extruding force near making the interior edge of notch end 1-1 and the groove bottom 1-3 between the link 1-2 of pressed end 3-1 cross-notching self-locking nut workpiece 1 of paw 3; The link 1-2 of self-locking nut workpiece 1 radially overturns to notch end 1-1 around it so that slot, thereby the endoporus of the link 1-2 of feasible fluting self-locking nut workpiece 1 forms taper hole, the internal thread formation self-locking structure of the link 1-2 of the just feasible self-locking nut workpiece 1 of slotting; Take off fluting self-locking nut workpiece 1 from this closing device at last, promptly accomplished the closing in processing of cross-notching self-locking nut workpiece 1.

The present invention in use; The extruding force that the pressed end of three paws acts on the cannelure bottom surface of fluting self-locking nut workpiece is consistent, makes that the distortion of all directions of link of fluting self-locking nut workpiece is consistent, thereby has guaranteed the requirement of locking property and the self-locking requirement of fluting self-locking nut finished product; And process simple and fast; Compare processing technology complicated in the prior art, the present invention has simple to operate, advantage easy to use.

In the above-described embodiments, columnar body is a cylinder, and in other embodiments, columnar body also can be other column structures such as square body, hexahedron.

In the above-described embodiments; Paw has three; In other embodiments; Paw also can have two or unnecessary three, and the concrete quantity of paw confirms according to the quantity of the groove of the notch end of fluting self-locking nut workpiece, the quantity of the groove of the notch end that just quantity of paw can not unnecessary fluting self-locking nut workpiece.

In the above-described embodiments, this closing device is applicable to processing hexagonal fluting self-locking nut, and in other embodiments, this closing device also goes for processing his self-locking nut of slotting such as bihexagonal head fluting self-locking nut.

Claims

1. the closing device of the self-locking nut of slotting; It is characterized in that: comprise the columnar body that is used for inserting the passage that the closing in pawl surrounds, convex with the closing in groove that is used to insert fluting self-locking nut workpiece on the periphery of described columnar body and apply the paw of extruding force to the part near fluting self-locking nut workpiece centre of the groove bottom of closing in groove from the notch end of fluting self-locking nut workpiece.

2. the closing device of fluting self-locking nut according to claim 1 is characterized in that: described paw has at least two, and evenly is laid on the periphery of columnar body.

3. the closing device of fluting self-locking nut according to claim 1 is characterized in that: described columnar body is cylinder or hexahedron.

4. the closing device of fluting self-locking nut according to claim 1; It is characterized in that: being used for of described paw applies end from extruding force to groove bottom is defined as pressed end, the circular fillet surface transition through processing between two two sides between the end face of described pressed end and the side.