CN201271744Y

CN201271744Y - Floating holding jaw

Info

Publication number: CN201271744Y
Application number: CNU2008201851538U
Authority: CN
Inventors: 朱凯
Original assignee: CHINA METAL (SUZHOU) PRECISION MACHINERY Co Ltd
Current assignee: CHINA METAL (SUZHOU) PRECISION MACHINERY Co Ltd
Priority date: 2008-08-25
Filing date: 2008-08-25
Publication date: 2009-07-15
Anticipated expiration: 2018-08-25

Abstract

The utility model relates to a floating clamping jaw. The utility model is characterized in that the floating clamping jaw comprises a bottom claw (1), a primary floating claw (3) and secondary floating claws (5); the primary floating claw (3) is movably arranged on the bottom claw (1) through a main swivel pin (2); the main floating claw (3) is in arc shape; the secondary floating claws (5) are movably arranged on both ends of the primary floating claw (3) through secondary swivel pins (4) respectively, which are also in arc shape; salient points are arranged on both ends of the secondary floating claws (5) respectively; and an axial dowel pin (6) positioned on a chuck is arranged on the bottom claw (1). The floating clamping claw adopts the two-stage floating structure arranged on the clamping jaw. As the multi-point clamping mode is adopted, the workpieces with irregular exicrcle can be ensured to be clamped reliably while the clamping force is dispersed and workpieces are prevented from deforming, thus improving the machining accuracy. In addition, the floating clamping jaw is simple in structure, manufactured and used conveniently; and the cost is low. The floating clamping jaw can be connected with any chuck for use, thus significantly widening the application range of the existing chucks.

Description

Jaw floats

Technical field

The utility model relates to a kind of workpiece clamp clamping tool, relates in particular to a kind of unsteady jaw of thin workpiece of the irregular or part wall thickness of cylindrical that is applicable to.

Background technology

Along with the continuous development of technology, more and more higher to the requirement on machining accuracy of component of machine.In machining, in order to prevent that workpiece is subjected to displacement or is out of shape in process, thereby influence machining accuracy, the processing of most of parts all will lean on clamping device that it is located accurately and reliably and clamps, to guarantee that workpiece is difficult for producing displacement and distortion in process.With turning is example, and most parts all are by scroll chuck or chuck piece-holder to be lived in driving processing, wherein use in the majority with scroll chuck.

By 3 principles of determining a circle, scroll chuck is to be used for the clamping round piece in most occasions.When using scroll chuck clamping part, the end of jaw contacts with workpiece, and contact point has three, and the direction of its bite is fixed, and as shown in Figure 1, Fig. 1 is the structural representation of scroll chuck of the prior art.

By the bite of scroll chuck as can be known, chucking power be three of five equilibrium from the power of bite towards the center, come clamping work pieces by 3 contacts.When workpiece is thin, in order to guarantee the reliable grip of workpiece, must guarantee certain clamping force, workpiece will produce corresponding strain under the effect of chucking power.After the workpiece processing, do not removing under the situation of clamping force, part be shaped as a proper circle, after clamping force discharges, because bite has been removed constraint, under the effect of strain, the bite position of part can pop up, and causes part circularity excessive, shown in Fig. 2,3.Fig. 2 processes the back round piece at the profile schematic diagram of not removing under the clamping force state in the prior art; Fig. 3 is the profile schematic diagram of processing back round piece under releasing clamping force state in the prior art.This distortion naked eyes generally are difficult to find, but in industry flourishing modern production like this, this distortion is easy to be detected, and much element precision are being required than under the condition with higher, and this distortion is not received often.In addition, when the part profile has than large deviation, when cylindrical is irregular,, cause that part is subjected to displacement in process, influence machining accuracy greatly because jaw link, so is very easy to cause certain jaw clamping force not enough.

At present, the floating chuck that a kind of special use is abroad arranged, be that jaw can rotating certain angle, but its jaw itself there is no float function, relocation mechanism is hidden in chuck body inside, and is complex-shaped, involve great expense, and bite is less, amount of floating is little, jaw must with the supporting use of specific chuck, versatility is very limited.

The utility model content

For solving the deficiencies in the prior art, the purpose of this utility model is the unsteady jaw that a kind of versatility is good, workpiece is difficult for generation displacement and distortion is provided, and guarantees the precision of processing.

For achieving the above object, the utility model is to realize by following technical scheme:

A kind of unsteady jaw is characterized in that comprising end pawl 1, main pawl 3 and the secondary pawl 5 that floats of floating, and the main pawl 3 that floats is installed on the end pawl 1 by main fulcrum post 2, and the main pawl that floats can center on main fulcrum post rotating certain angle; Be separately installed with the secondary pawl 5 that floats in main unsteady 3 two ends of pawl by secondary fulcrum post 4, the secondary pawl that floats can center on secondary fulcrum post rotating certain angle, is respectively equipped with raised points in unsteady 5 two ends of pawl of pair; The axial location pin 6 of restriction workpiece axial displacement also is installed on end pawl 1.

Aforesaid unsteady jaw is characterized in that two ends of the unsteady pawl 3 of described master have groove, and the secondary pawl 5 that floats is installed in the groove respectively.

The beneficial effects of the utility model: unsteady jaw of the present utility model adopts the secondary floating structure, and relocation mechanism is arranged on the jaw, adopt the multiple spot method of clamping, when disperseing chucking power to prevent workpiece deformation, can also guarantee the reliable grip of the irregular workpiece of cylindrical, prevent from process, to be subjected to displacement, improved machining accuracy greatly, the utility model is simple in structure, manufacturing, easy to use, cost is very low, and can be connected use with any chuck, has widened the scope of application of existing chuck greatly.

Description of drawings

Fig. 1 is the structural representation of scroll chuck of the prior art;

Fig. 2 processes the back round piece at the profile schematic diagram of not removing under the clamping force state in the prior art;

Fig. 3 is the profile schematic diagram of processing back round piece under releasing clamping force state in the prior art;

Fig. 4 is the structural representation of unsteady jaw of the present utility model.

Main symbol implication is among the figure:

1, end pawl, 2, main fulcrum post, 3, the main pawl that floats, 4, secondary fulcrum post, 5, the secondary pawl that floats, 6, the axial location pin.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is carried out concrete introduction.

Fig. 4 is the structural representation of unsteady jaw of the present utility model.As shown in the figure, unsteady jaw of the present utility model includes end pawl 1, main pawl 3 and the unsteady pawl 5 of floating, and the main pawl 3 that floats is installed on the end pawl 1 by main fulcrum post 2, can be around main fulcrum post 2 rotating certain angle.Two ends at the main pawl 3 that floats are equipped with the secondary pawl 5 that floats by secondary fulcrum post 4 respectively, and the secondary pawl 5 that floats also can center on secondary fulcrum post 4 rotating certain angle.Two ends at the unsteady pawl 5 of pair are provided with a raised points respectively.Installation shaft is used for the workpiece axial location to alignment pin 6 on end pawl 1.

In order to make the compact conformation of jaw, the clamping better effects if leading two ends difference machined grooves of the pawl 3 that floats, is installed in the unsteady pawl 5 of pair in the groove.

The utility model can be installed on hand chuck or the oild chuck, and the mode by manual or hydraulic pressure changes the position of the jaw that floats and comes the workpiece of the different appearance and sizes of clamping.Unsteady pawl 3 of master of the present utility model and the secondary pawl 5 that floats all are floating type, promptly adopt the secondary floating structure, and bite is more, therefore, have than large deviation or the irregular workpiece of cylindrical for appearance and size, the main pawl 3 that floats can rotate suitable angle according to concrete workpiece appearance and size with the secondary pawl 5 that floats, raised points on the secondary pawl 5 that floats can be contacted with workpiece well, enough chucking powers are provided, workpiece is clamped reliably, prevent that workpiece is subjected to displacement in process, guarantee machining accuracy.

Simultaneously, the utility model can be according to the diameter of workpiece, realize ten two clampings like a cork or realize 24 clampings by installing the unsteady pawl of one-level on floating pawl in pair again additional, make chucking power disperse, and be evenly distributed in the periphery of workpiece, when the clamping thin-wall workpiece, can reduce the strain of workpiece to greatest extent, guarantee the dimensional accuracy of processing back workpiece.

The utility model is simple in structure, and is easy to manufacture, easy to operate, with low cost, because floating structure is located on the jaw, therefore can be connected use with any chuck, widened the scope of application of existing chuck greatly.

The foregoing description does not limit the utility model in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in the protection domain of the present utility model.

Claims

1, unsteady jaw is characterized in that comprising end pawl (1), the unsteady pawl (3) of master and the unsteady pawl (5) of pair, and the master is unsteady, and pawl (3) is installed on the end pawl (1) by main fulcrum post (2), and the master is unsteady, and pawl can center on main fulcrum post rotating certain angle; Be separately installed with the secondary pawl (5) that floats in main unsteady (3) two ends of pawl by secondary fulcrum post (4), the secondary pawl (5) that floats can center on secondary fulcrum post (4) rotating certain angle, is respectively equipped with raised points in unsteady (5) two ends of pawl of pair; The axial location pin (6) of restriction workpiece axial displacement also is installed on end pawl (1).

2, unsteady jaw according to claim 1 is characterized in that float two ends of pawl (3) of described master have groove, and the secondary pawl (5) that floats is installed in the groove respectively.