CN2688444Y

CN2688444Y - Hydraulic high-precision centering clamp chuck

Info

Publication number: CN2688444Y
Application number: CN 200420031140
Authority: CN
Inventors: 张重阳
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-09
Filing date: 2004-04-09
Publication date: 2005-03-30
Anticipated expiration: 2014-04-09

Abstract

The utility model relates to a hydraulic high-precision centering clamp chuck which comprises a clamp chuck body (1) and a connecting body (2), wherein the connecting body (2) and a machine tool body can be disassembled, and are fixedly connected; the clamp chuck body (1) is provided with a central axial pore canal for accommodating a cutter (3); an inner cavity of the central axial pore canal is tightly sheathed with an inner sleeve (7) with an elastic thin wall; the inner sleeve (7) is a concave structure of which the walls on both ends are thick and the mid wall is thin; a pressurizing gap (4) which circles the whole circumference is formed between the inner sleeve (7) and an inner cavity wall of the central axial pore canal, and hydraulic medium is filled in the pressurizing gap (4); the pressurizing gap (4) is communicated with a liquid filling hole by a hydraulic passage (5); a hydraulic work through hole communicated with the hydraulic passage (5) is also arranged on the clamp chuck body (1), and the hydraulic work through hole is tightly connected with a work screw (14), a plunger piston (15) and a sealing ring (16) from outer to inner. The utility model has better alignment accuracy and balancing for the cutter than a general clamp chuck, and has the advantages of convenient and fast cutter loading and unloading, time saving and labor saving; the cutter needs to take 3 to 5 seconds to be replaced once.

Description

The high-precision centering chuck of hydraulic pressure

Technical field

The utility model relates to a kind of chuck, the high-precision centering chuck of particularly a kind of hydraulic pressure.

Background technology

In existing clamping technology, some different enforcement kinds are arranged, its structure mostly is to utilize the inner sleeve of band conical surface body to admit cutter, inner sleeve makes the inner sleeve distortion to clamp and to unload and get cutter by axially moving with threaded outer sleeve.The contact-making surface of this chuck inner sleeve and cutter is little, and accuracy of alignment is not high, and the loading and unloading cutter is wasted time and energy.Also having a kind of is to make the inner sleeve distortion of band conical surface body reach the purpose of loading and unloading cutter by the roller motion, and this type of chuck loading and unloading cutter needs rotating cycle many, and volume is big, and manufacture component is many and accuracy of alignment is low.

Summary of the invention

For overcoming above shortcoming and defect part, the utility model provides a kind of chuck that cutter is convenient fast, accuracy of alignment is high that loads and unloads.

The utility model purpose realizes by following scheme: the high-precision centering chuck of a kind of hydraulic pressure, it comprises that clamper main body reaches and the connector of the detachable Joint of lathe body, clamper main body has a central axial channel that is used to admit tool bar, it is characterized in that closely being socketed with an elastic thin-wall inner sleeve at central axial channel inner chamber, this inner sleeve is the thin concave structure of two ends wall thickness midfeather, form the supercharging gap of adorning hydraulic medium around wholecircle in week between inner sleeve and the central axial channel internal chamber wall, this supercharging gap communicates with liquid injection hole by hydraulic channel, also be provided with the hydraulic through hole that communicates with hydraulic channel on the clamper main body, it from outside to inside close proximity the work screw is arranged, plunger, sealing ring.

When the needs clamp-on tool, work screw with the fastening hydraulic through hole of instrument, by the hydraulic medium in the plunger extruding hydraulic through hole, make hydraulic medium be full of the gap all around of elastic thin-wall inner sleeve, the elastic thin-wall inner sleeve is produced the pressure that radially tightens, thus the tool bar in centering and the inner clamping sleeve tube.When needs unload bottom tool, with the work screw of loosening tool hydraulic through hole, make under the reaction of elastic thin-wall inner sleeve that the hydraulic medium in the gap refluxes around it, the elastic thin-wall inner sleeve restores to the original state, releasing has been finished becoming flexible cutter to the pressure that tool bar tightens.

For prevent that unexpected overload damage inner sleeve of chuck inner sleeve and inner sleeve from rotating in chuck, preferably have the location pin through hole of a pair of radial symmetric on the clamper main body, pin inner end, a pair of location respectively with the inner sleeve Joint.

Liquid injection hole and hydraulic through hole respectively have 1 pair, the position of opening radial symmetric on clamper main body respectively.Because all structure members of this chuck are radial symmetric all, dynamic balancing is handled so it goes without doing, even in high speed operation, also can not make chuck itself produce eccentric rotation.

Because when initial filling liquid piezodielectric, what usually add is excessive, so with work screw loosening one segment distance of one of them hydraulic through hole, to alleviate the too high problem of oil pressure.Along with the consumption of hydraulic medium, can compress this screw gradually later on, to reach best locking force.Therefore, the work screw when loading and unloading cutter at ordinary times on this hydraulic through hole of quiescing, and only operate work screw on its corresponding another hydraulic through hole.For avoiding maloperation, around the hydraulic through hole of operation loading and unloading cutter, do mark, i.e. degree of tightness position mark.In loading and unloading during cutter,, make the hydraulic through hole that has the degree of tightness position mark forward the position of operator's handled easily to if the hydraulic through hole that has a degree of tightness position mark not on the position of operator's handled easily the time, can rotate chuck with hand.Owing to will often rotate chuck,, be with the hand-held jiggering gum cover of a circle at clamper main body outer surface maximum gauge place for making operator's comfortable feel and increasing frictional force.

For clamping the cutter of different sizes and shape, these anchor clamps can be made the different central axial channel of diameter, but consider cost, can correspondingly make the cutter that some reducing bushings come clamping to vary in size.

The utlity model has following advantage: inner sleeve forms fully with tool bar and contacts during (1) clamp-on tool, can very securely cutter be clamped in the inner sleeve, has than better cutter accuracy of alignment of common chuck and balance.(2) clamp and unload that to get cutter very convenient quick, time saving and energy saving, whenever exchanging a cutter time spent for only needs 3-5 second.(3) because inner sleeve is very thin and be full of hydraulic medium around when work,, alleviate wearing and tearing to cutter so cutter is had certain cushioning effect.

Description of drawings:

Partial cutaway schematic during Fig. 1 the utility model clamp-on tool;

Fig. 2 is the A-A generalized section of Fig. 1.

The specific embodiment:

Below in conjunction with accompanying drawing the utility model is described further: this chuck is made by the extremely strong material of rigidity, as shown in Figure 1 and Figure 2, it comprise clamper main body 1 and can with the connector 2 of the detachable Joint of lathe body, connector 2 is conical surface body, in the corresponding conical internal cavity on the various lathes of can fixedly packing into (as milling machine, drilling machine, lathe, grinding machine or other lathe).Clamper main body 1 has a circular central axial channel that is used to admit cutter 3 bars, central authorities' axial channel inner chamber closely is socketed with the elastic thin-wall inner sleeve 7 of a steel, they connect for interference fit, this inner sleeve 7 is the thin concave structure of two ends wall thickness midfeather, the about 1mm of middle wall thickness, the two ends wall thickness is about 1 times of middle wall thickness, form the supercharging gap 4 of adorning hydraulic medium around wholecircle in week between inner sleeve 7 and the central axial channel internal chamber wall, the hydraulic channel 5 of this supercharging gap 4 by a pair of radial symmetric communicates with the liquid injection hole of a pair of radial symmetric that open on clamper main body 1 surface, and liquid injection hole is housing screw 9 from outside to inside, sealed steel ball 8.Have the nest 13 of the indent of a pair of radial symmetric on clamper main body 1 surface, in clamper main body 1, have the hydraulic through hole of a pair of radial symmetric thus in the nest, hydraulic through hole close proximity from outside to inside has work screw 14, plunger 15, sealing ring 16, and the hydraulic through hole is connected with hydraulic channel 5.For avoiding maloperation, around the hydraulic through hole of doing the operation of loading and unloading cutter at ordinary times, catch conspicuous color, promptly the degree of tightness position mark 12.For preventing that the hydraulic medium in clamp-on tool when operation supercharging gap 4 from leaking, and respectively is provided with a sealing ring (10,11) between supercharging gap 4 front and back inner sleeves 7 and central axial channel internal chamber wall.Have the location pin through hole of a pair of radial symmetric on clamper main body 1 surface, pin 6 inner ends, a pair of location respectively with inner sleeve 7 Joints.Clamper main body 1 outer surface maximum gauge place is with the hand-held jiggering gum cover 17 of a circle, and the person rotates chuck with handled easily.

Claims

1, the high-precision centering chuck of a kind of hydraulic pressure, it comprises that clamper main body (1) reaches and the connector (2) of the detachable Joint of lathe body, clamper main body (1) has a central axial channel that is used to admit cutter (3) bar, it is characterized in that: closely be socketed with an elastic thin-wall inner sleeve (7) at said central axial channel inner chamber, this inner sleeve (7) is the thin concave structure of two ends wall thickness midfeather, form the supercharging gap (4) of adorning hydraulic medium around wholecircle in week between inner sleeve (7) and the central axial channel internal chamber wall, this supercharging gap (4) communicates with liquid injection hole by hydraulic channel (5), also be provided with the hydraulic through hole that communicates with hydraulic channel (5) on the clamper main body (1), it from outside to inside close proximity work screw (14) is arranged, plunger (15), sealing ring (16).

2, chuck according to claim 1 is characterized in that having on the clamper main body (1) the location pin through hole of a pair of radial symmetric, a pair of location pin (6) inner end respectively with inner sleeve (7) Joint.

3, chuck according to claim 1 is characterized in that said liquid injection hole and hydraulic through hole respectively have 1 pair, is located at the position that clamper main body (1) is gone up radial symmetric respectively.

4, chuck according to claim 1 is characterized in that clamper main body (1) outer surface maximum gauge place is provided with the hand-held jiggering gum cover (17) of a circle.

5, chuck according to claim 3 is characterized in that in said 1 pair of hydraulic through hole having degree of tightness position mark (12) around wherein 1.