CN2215375Y

CN2215375Y - Multi-piece floating presure hold-down device

Info

Publication number: CN2215375Y
Application number: CN 94215743
Authority: CN
Inventors: 王全福; 彭加宝; 张健生; 刘立华
Original assignee: QING'AN AEROSPACE EQUIPMENT CO
Current assignee: QING'AN AEROSPACE EQUIPMENT CO
Priority date: 1994-06-28
Filing date: 1994-06-28
Publication date: 1995-12-20
Anticipated expiration: 2004-06-28

Abstract

The utility model relates to a multi-piece floating pressure hold-down device, which is composed of a dynamic floating pressing plate component, a self-centering mechanism, etc. The utility model is characterized in that the pressing plate is matched with the spherical surface of a pressing block through a conical surface; one pressing plate can be matched with three pressing blocks; the dynamic floating pressing plate component can float relatively to a supporting rack of a rotating shaft; the sphere end surface of the supporting rack is matched with the ball socket of the pressing plate; a rubber pad which resets the pressing plate is arranged between the supporting rack and the pressing plate; an angular contact ball bearing is arranged between the rotating shaft and the supporting rack; the rotating shaft 2 is self-centered by six centering components uniformly distributed along circumference, and the rotating shaft can also move relatively to an upper cap; the upper and the lower parts of the big end surface are supported by an end surface bearing which is composed of a partition board and a steel ball. The utility model has the advantages of simple structure, substantially enhanced processing effect, etc.

Description

Multi-piece floating presure hold-down device

The utility model relates to a kind of many unsteady hold down gags, and it is made up of many dynamic floating platen assemblies and self-centering unit etc.

General unsteady hold down gag is that multi-point interlinked clamp mechanism or many interlock hold-down mechanisms all are to be distributed on several identical or different workpiece by float pressure head or unsteady hold-down mechanism by a motive power to compress.Workpiece is in a single day compacted, and is promptly not movable in process, so-called static hold down.

The utility model is on the basis of static hold down, increased workpiece to be machined wraparound commentaries on classics center in process is rotated, and a kind of novel many hold down gags that dynamically float of static relatively centre of gyration self-centering function.

The purpose of this utility model can realize by the following method.

Rotating shaft is under the centering part effect that ejector pin, spring, swivel nut are formed, and the upper cover plate and the static centre of gyration are felt relieved relatively.

The conical surface on the pressing plate of floating platen assembly and the sphere of briquetting cooperate, and guarantee unsteady the compressing of workpiece that briquetting is pressed, and can reset under the effect of rubber blanket.

Rotating shaft is supported by a pair of angular contact ball bearing and bracing frame, the ball-type end face of bracing frame cooperates with the ball-and-socket of pressing plate, can guarantee dynamically floating of the dynamic floating platen assembly and the workpiece of pressing thereof, guaranteed again dynamic floating platen assembly and the workpiece of pressing in process, can rotate around the axis, and with the self-centering of the relative together upper cover plate of rotating shaft and the static centre of gyration.

Be described further below in conjunction with accompanying drawing:

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the another kind of version of dynamic floating platen assembly and the schematic diagram that it is connected with self-centering unit and transition disc

As can be seen from Figure 1: the self-centering unit of many unsteady hold down gags is by upper cover plate 1, rotating shaft 2, form every dish 3,6, steel ball 4,7 and ejector pin 8, spring 9, swivel nut 10, lower cover 11, angular contact ball bearing 5, bracing frame 16.Dynamically floating of device presses assembly to be made up of pressing plate 14, briquetting 15,

rubber blanket

12,13 and cover plate 17.

Adjust the self-centering that six centering parts of being made up of ejector pin 8, spring 9, swivel nut 10 can guarantee the rotating shaft 2 relative upper cover plates 1 and the static centre of gyration.The upper and lower end face bearing of forming every dish 3,6 and steel ball 4,7 can guarantee that rotating shaft 2 moves freely relative to upper and lower cover plate.Rotating shaft is supported by two angular contact ball bearings 5 and bracing frame 16 thereof, and the ball-type end face of bracing frame is seated in the ball-and-socket of pressing plate 14.Three conical surface a on the pressing plate 14 cooperate with the sphere of three briquettings 15, and each connects with two screws.Make whole floating platen assembly can press three workpiece that thickness is different simultaneously, and make briquetting 15 and the workpiece of pressing can with pressing plate 14 around the shaft 2 the rotation.

Resetting is pressed on the end face of bracing frame 16 and pressing plate 14 by cover plate 17 with

rubber blanket

12,13, and is connected with pressing plate with six screws.The thickness difference of briquetting 15 workpiece of pressing, the domain of walker of promptly floating and compressing depends on the size of two screw via holes.

Be processed with four screwed holes on the end face of upper cover plate 1, can be used to be connected with transition disc 18.Three these devices of cover can be combined by a transition disc 18, realize once compressing the purpose of 9 workpiece.See shown in the accompanying drawing 2.

Pressing plate 14 and briquetting 15 all can be replaced with other forms as required, and especially the shape of briquetting 15 can be made according to the shape of pressure part.Be exactly a kind of form wherein as shown in Figure 2.

It is simple, novel that the utility model compared with prior art has the structure form, processes the advantages such as effect can increase substantially.

Claims

1, a kind of many unsteady hold down gags, it is made up of dynamic floating platen assembly and self-centering unit etc., dynamically the floating platen assembly is by pressing plate 14, briquetting 15, rubber blanket 12,13 and cover plate 17 form, self-centering unit is by upper and lower cover plate 1,11, rotating shaft 2, every dish 3,6, steel ball 4,7 and ejector pin 8, spring 9, swivel nut 10 centering part and the bracing frame 16 formed form, it is characterized in that:

1) in the floating platen assembly that many dynamically compress, pressing plate 14 cooperates with the sphere of briquetting 15 by conical surface a, a pressing plate can cooperate with three briquettings simultaneously, dynamically the floating platen assembly can float with respect to rotating shaft bracing frame 16, the ball-type end face b of bracing frame 16 cooperates with the ball-and-socket of pressing plate 14, and the rubber blanket 12,13 that pressing plate is resetted is housed between bracing frame 16 and the pressing plate 14, is equipped with angular contact ball bearing 5 between rotating shaft 2 and the bracing frame 16;

2) in the self-centering unit, rotating shaft 2 guarantees self-centering by 6 along the equally distributed centering part of circumference, and rotating shaft 2 also can be moved with respect to loam cake 1, the upper and lower end face bearings that all has by dividing plate 3,6 and steel ball 4,7 compositions of its large end face.

2, many unsteady hold down gags according to claim 1, it is characterized in that: pressing plate 14 and the briquetting 15 that holds down assembly that dynamically float can be changed according to the needs mounting or dismounting of pressure workpiece, pressing plate 14 only is connected with two screws with briquetting 15, being connected with 6 screws of cover plate 17 and pressing plate.

3, many unsteady hold down gags according to claim 1 is characterized in that: transition disc 18 can combine three these devices, realizes many dynamically unsteady compressing, and the screwed hole that is connected with transition disc 18 is arranged on the upper cover plate 1.