CN210632956U - High-precision small-bore internal expansion spring chuck device - Google Patents

Abstract

The utility model discloses a high accuracy aperture internal expanding collet chuck device, including the cartridge holder, the protection end cover, draw the cover, the location mandrel, the dust ring, internal expanding collet chuck and taut axle, cartridge holder one end is provided with the protection end cover, be provided with in the protection end cover and draw the cover, install the location mandrel on the cartridge holder, be provided with the dust ring in the protection end cover, and the dust ring setting is in one side of drawing the cover, the cover is equipped with internal expanding collet chuck on the location mandrel, cartridge holder and location mandrel are provided with three holes on same position, and the three claw that draws of taut axle passes the hole that corresponds the position and draws the cover to be connected, the cartridge holder, protection end cover and location mandrel are fixed part, draw the cover, the dust ring, internal expanding collet chuck and taut axle are the tensile motion part. The expansion sleeve is fixed in the traditional small-aperture cartridge clip structure, the structure of the blind rivet movement is changed into a structure of split type internal expansion mandrel fixation, the structure of the expansion sleeve movement is greatly enhanced, and the precision of the positioning mandrel is greatly improved.

Description

High-precision small-bore internal expansion spring chuck device

Technical Field

The utility model relates to a lathe processing field specifically is a little aperture internal expanding collet chuck device of high accuracy.

Background

The numerical control lathe is one of the processing devices which are widely used at present, and is a processing mode that a part processing program is compiled in advance and input into a numerical control system, a processing start-stop position is set before processing, a part is clamped on a main shaft clamp, the main shaft is controlled to rotate through the numerical control system during processing, and a cutter moves axially or radially on the surface of the part and cuts off redundant parts on the surface of the part.

At present, the clamping modes of a workpiece on a numerical control lathe mainly comprise a manual chuck, a power chuck, a spring chuck and a special customized clamp, wherein the spring chuck clamping mode is widely applied to lathe machining due to the characteristics of small deformation, small vibration, convenience in clamping, simple structure, low cost and the like after the workpiece is clamped; however, when the inner diameter of a small-bore part is clamped, the inner expansion spring chuck of the traditional structure adopts a tension or inner expansion structure, and the clamping force and the clamping precision cannot be guaranteed due to the fact that the pull rod is too small and not enough in strength, so that users who apply the inner expansion spring chuck are troubled for a long time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a little aperture internal expanding collet chuck device of high accuracy to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a high accuracy aperture internal expanding collet chuck device, including cartridge holder, the protective end cover, draw the cover, the location mandrel, the dust ring, internal expanding collet chuck and taut axle, cartridge holder one end is provided with the protective end cover, be provided with in the protective end cover and draw the cover, install the location mandrel on the cartridge holder, be provided with the dust ring in the protective end cover, and the dust ring sets up the one side at drawing the cover, the cover is equipped with internal expanding collet chuck on the location mandrel, cartridge holder and location mandrel are provided with three holes on same position, and the three claw that draws of taut axle passes the hole that corresponds the position and is connected with the cover that draws, cartridge holder, protective end cover and location mandrel are fixed component, draw the cover, the dust ring, internal expanding collet chuck and taut axle are tensile moving part.

Preferably, the cartridge holder is assembled on the numerical control lathe spindle through a connecting flange.

Preferably, the internal expansion spring chuck is sleeved on the positioning mandrel, and one end of the tensioning shaft is connected with the internal expansion spring chuck through the pulling sleeve.

Preferably, the cartridge holder and the protection end cover are both provided with screw holes, and the protection end cover and the cartridge holder are fixedly connected through the screw holes and the screw threads of the screws in a matched mode.

Preferably, one end of the tensioning shaft is connected with the rotary oil cylinder through a pull rod.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the expansion sleeve is fixed in the traditional small-aperture cartridge clip structure, and the structure that the blind rivet moves is changed into the structure that the split type internal expansion mandrel is fixed and the expansion sleeve moves, so that the rigidity of the body is greatly enhanced, and the precision of the positioning mandrel is greatly improved;

2. the pull claw at the head part of the tensioning shaft is innovatively made into a three-claw structure, and the handle part can be made to be very thick, so that the rigidity of the tensioning part is enhanced, the clamping force of the cartridge clip is greatly enhanced, and the service life of the cartridge clip is greatly prolonged;

3. the device reasonable in design, the structure is ingenious, and the chuck is changed conveniently, and the part centre gripping is reliable and the repeatability is very high, and the part size uniformity is very good when the batch processing, and this product has solved the difficult problem of long-term puzzlement user's minor diameter hole part high accuracy centre gripping processing under the prerequisite that need not to increase extra cost.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1. a cartridge holder; 2. a protective end cap; 3. pulling the sleeve; 4. positioning a mandrel; 5. a dust ring; 6. an inner expansion spring chuck; 7. and (5) tensioning the shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1, the present invention provides a technical solution: a high-precision small-aperture internal expansion spring chuck device comprises an elastic clamp seat 1, a protective end cover 2, a pull sleeve 3, a positioning mandrel 4, a dust ring 5, an internal expansion spring chuck 6 and a tensioning shaft 7, wherein the protective end cover 2 is arranged at one end of the elastic clamp seat 1, the pull sleeve 3 is arranged in the protective end cover 2, the positioning mandrel 4 is installed on the elastic clamp seat 1, the jumping of the adjusting mandrel is less than 0.005mm so as to ensure the radial jumping precision after workpiece clamping, the dust ring 5 is arranged in the protective end cover 2, the dust ring 5 is arranged at one side of the pull sleeve 3, the internal expansion spring chuck 6 is sleeved on the positioning mandrel 4, three holes are formed in the same position of the elastic clamp seat 1 and the positioning mandrel 4, three pull claws of the tensioning shaft 7 penetrate through the holes in corresponding positions to be connected with the pull sleeve 3, the three pull claws of the tensioning shaft 7 penetrate through the elastic clamp seat 1 to pull the pull sleeve 3 and the internal expansion spring chuck 6 to clamp a workpiece installed on the expansion, the elastic clamping seat 1, the protective end cover 2 and the positioning mandrel 4 are fixed components and are used for guaranteeing the radial runout precision of parts, and the pull sleeve 3, the dust ring 5, the internal expansion spring chuck 6 and the tensioning shaft 7 are stretching moving components and are used for clamping or loosening the parts.

The cartridge holder 1 is assembled on a main shaft of the numerical control lathe through a connecting flange, and the positioning mandrel 4 is conveniently installed on the cartridge holder 1.

The inner expansion spring chuck 6 is sleeved on the positioning mandrel 4, and one end of the tensioning shaft 7 is connected with the inner expansion spring chuck 6 through the pull sleeve 3, so that a workpiece arranged on the expansion sleeve is clamped tightly.

The cartridge holder 1 and the protection end cover 2 are both provided with screw holes, the protection end cover 2 and the cartridge holder 1 are fixedly connected through the screw holes and screw threads, the protection end cover 2 and the cartridge holder 1 are fixed, the internal expansion spring chuck 6 and the pull sleeve 3 can be protected, parts can be axially positioned, and the axial size of the parts during machining is ensured.

One end of the tensioning shaft 7 is connected with the rotary oil cylinder through a pull rod, and the tensioning part and the part are tensioned through the back pulling of the rotary oil piston cylinder and loosened through the front pushing of the piston cylinder.

The working principle is as follows: the cartridge holder 1 is assembled on a numerical control lathe spindle through a connecting flange, then the positioning mandrel 4 is installed on the cartridge holder 1, the jumping of the positioning mandrel 4 can be controlled to be smaller than 0.005mm through adjustment, three pulling claws of a tensioning shaft 7 can penetrate through three holes formed in the cartridge holder 1 and the positioning mandrel 4 to be connected with an inner expansion spring chuck 6 for tensioning or loosening the inner expansion spring chuck 6, the inner expansion spring chuck 6 is sleeved on the positioning mandrel 4, the tensioning shaft 7 and the inner expansion spring chuck 6 are connected through a split pulling sleeve 3, a protective end cover 2, a dust ring 5 and the cartridge holder 1 are fixed, the inner expansion spring chuck 6 and the pulling sleeve 3 can be protected, parts are axially positioned, the axial size of the parts during machining is ensured, the tensioning shaft 7 is connected with a rotary oil cylinder through a pull rod, the tensioning part is pulled backwards through a rotary oil cylinder piston, and the piston pushes the loosening part forwards.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a high accuracy aperture internal expanding collet chuck device, includes collet chuck (1), protection end cover (2), draws cover (3), location mandrel (4), dust ring (5), internal expanding collet chuck (6) and taut axle (7), its characterized in that: one end of the cartridge holder (1) is provided with a protective end cover (2), a pull sleeve (3) is arranged in the protective end cover (2), a positioning mandrel (4) is installed on the cartridge holder (1), a dust ring (5) is arranged in the protective end cover (2), the dust ring (5) is arranged on one side of the pull sleeve (3), an inner expansion spring chuck (6) is sleeved on the positioning mandrel (4), three holes are formed in the same position of the cartridge holder (1) and the positioning mandrel (4), three pull claws of the tensioning shaft (7) penetrate through the holes in the corresponding positions to be connected with the pull sleeve (3), the cartridge holder (1), the protective end cover (2) and the positioning mandrel (4) are fixed components, and the pull sleeve (3), the dust ring (5), the inner expansion spring chuck (6) and the tensioning shaft (7) are stretching motion components.

2. The high-precision small-bore internal expanding collet chuck device according to claim 1, wherein: the elastic clamping seat (1) is assembled on a numerical control lathe spindle through a connecting flange.

3. The high-precision small-bore internal expanding collet chuck device according to claim 1, wherein: the inner expansion collet chuck (6) is sleeved on the positioning mandrel (4), and one end of the tensioning shaft (7) is connected with the inner expansion collet chuck (6) through the tensioning sleeve (3).

4. The high-precision small-bore internal expanding collet chuck device according to claim 1, wherein: the cartridge clip seat (1) and the protection end cover (2) are both provided with screw holes, and the protection end cover (2) and the cartridge clip seat (1) are fixedly connected through the screw holes and the screw threads of the screws.

5. The high-precision small-bore internal expanding collet chuck device according to claim 1, wherein: one end of the tensioning shaft (7) is connected with the rotary oil cylinder through a pull rod.

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