CN201324955Y

CN201324955Y - Turning device

Info

Publication number: CN201324955Y
Application number: CNU2008201548899U
Authority: CN
Inventors: 吴永旭; 张永泉; 彭学斌; 姜娟
Original assignee: Shanghai East Pump Group Co Ltd
Current assignee: Shanghai East Pump Group Co Ltd
Priority date: 2008-11-04
Filing date: 2008-11-04
Publication date: 2009-10-14
Anticipated expiration: 2018-11-04

Abstract

The utility model discloses a turning device, which comprises a chuck, a claw movably connected with the chuck, and a clamping device, wherein the claw is used for clamping one end of a workpiece; and the clamping device is used for clamping the other end of the workpiece. The clamping device comprises a clamp body, a pressing cap nut and a pressing elastic sleeve, wherein one end of the clamp body is connected with the chuck through a flange; the center of the clamp body is coaxial with that of the chuck; the other end of the clamp body is provided with coaxial internal and external screw threads; one end of the pressing cap nut is connected with the clamp body therein through the screw threads, and the other end is provided with an internal conical surface; and one end of the pressing elastic sleeve is provided with an external screw thread, and the other end is provided with an elastic sleeve with an external conical surface. The turning device has improved efficiency and safety performance.

Description

A kind of truning fixture

Technical field

The utility model relates to a kind of machinery processing apparatus, particularly a kind of truning fixture.

Background technology

Some middle-size and small-size sleeve parts as the bearing bracket stand (with reference to figure 1) of centrifugal pump, need be processed dead eye and an end flanges cylindrical and end face.Add man-hour, need assurance one end flanges cylindrical and end face that requirement is jumped in the axiality and the footpath of dead eye, because workpiece is longer, clamping centering difficulty, and also usually because clamping is bad, workpiece falls down in turning process, causes security incident.People just work hard in the frock design.Should guarantee that workpiece can not fall down when turning, guarantee that again workpiece can be not big because of clamping force, make workpiece deformation and cause workpiece to scrap, the frock of therefore processing middle-size and small-size sleeve part is designed to a key in the processing.

At present in small batch is produced, (being processed as example with bearing bracket stand) people use an end of the claw 12 clamp shaft bolsters 13 on the scroll chuck 11 usually, process behind the centering other end, waste time and energy, and usually because workpiece 13 folders are not tight, workpiece 13 falls down and causes the accident in turning process; Perhaps because clamping force is excessive, make workpiece 13 distortion, the dead eye form error after the processing can be scrapped because of the overproof workpiece that causes.

The utility model content

Technical problem to be solved in the utility model provides a kind of truning fixture, to improve the working (machining) efficiency of sleeve part, improves machining accuracy, guarantees production safety, avoids taking place in the process human casualty accident.

Technical problem to be solved in the utility model can be achieved through the following technical solutions:

A kind of truning fixture comprises chuck and the claw that is movably connected on the chuck, and this claw clamps workpiece one end, it is characterized in that, also comprises a clamping device that is connected with chuck, to clamp the described workpiece other end.

Described clamping device comprises: a clamp body, this clamp body one end are provided with one described clamp body are connected to ring flange on the described chuck, and the other end is provided with coaxial internal and external screw thread; The center of this clamp body is coaxial with the center of chuck;

One compresses the bullet cover, and this compresses bullet and overlaps an end and have an external screw thread, and this external thread rotary is in the internal thread of the described clamp body other end; The described other end that compresses the bullet cover has an elastic jacket in order to clamping work pieces, and the circumferential surface of described elastic jacket is an outer conical surface;

One jam nut, this jam nut one end has an internal thread, and this internal thread is threaded onto on the external screw thread of the described clamp body other end; The other end of this jam nut is provided with a female cone locking face that matches with the outer conical surface of elastic jacket, moves this female cone locking face, can force described elastic jacket to clamp described workpiece.

The taper seat that compresses the bullet cover is big at the end diameter near described chuck, and is little away from an end diameter of described chuck.

Compress between the taper seat of screw thread one end of bullet cover and other end elastic jacket and open a groove, reduce wall thickness, to improve the elasticity of taper seat one end.Compress the bullet cover and along the circumferential direction evenly drive one or more open slots, make its workpiece easy to setup.

After adopting above technical scheme, can improve the working (machining) efficiency of sleeve part, improve machining accuracy; Guarantee production safety, avoid taking place in the process human casualty accident.

Description of drawings

Fig. 1 is a prior art truning fixture structural representation.

Fig. 2 is the structural representation of the embodiment of the invention.

Fig. 3 is for compressing the detailed maps of bullet cover among the present invention.

The specific embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Referring to Fig. 2, a claw 2 and a clamping device that truning fixture comprises three-jaw self-centering chuck 1, flexibly connects with this chuck.This clamping device comprises screw 3, clamp body 4, jam nut 6 and compresses bullet cover 7.When turning, earlier workpiece 5 is put in the clamp body 4 of clamping device, be fixed on the chuck 1 by claw 2 then.

Wherein, an end of clamp body 4 is provided with ring flange 42, passes ring flange 42 by screw 3 and is connected on the described chuck 1, and the center of the center of clamp body 4 and chuck 1 is coaxial, to guarantee safety in production, improves machining accuracy.The other end of this clamp body 4 has coaxial internal and external screw thread, so that be threaded with other structure.

An end that compresses bullet cover 7 has external screw thread, and this external thread rotary is in the internal thread of described clamp body 4 other ends; The other end that compresses bullet cover 7 is that the circumferential surface of this elastic jacket 76 is outer conical surface 72 in order to the elastic jacket 76 of clamping work pieces as shown in Figure 3, and these outer conical surface 72 belows are provided with the structure 73 that is complementary with workpiece 5, can clamp this workpiece 5.

One end 61 of jam nut 6 is provided with internal thread, be threaded onto on the other end external screw thread of its inner clamp body 4, the other end of jam nut 6 is provided with a female cone locking face 62 that matches with the outer conical surface 72 of elastic jacket 76, move this female cone locking face 62, can force described elastic jacket 76 to clamp described workpiece.

The described taper seat 72 that compresses bullet cover 7 is big at the end diameter near described chuck 1, and is little away from an end diameter of described chuck 1.

During use three-jaw self-centering chuck 1 is fixed on the lathe spindle, workpiece 5 is put in the clamp body 4, earlier the small end of workpiece 5 is clamped, rotate jam nut 6 then, jam nut 6 is axially moved to the direction of scroll chuck 1 relative to clamp body 4 with chuck 1; Be connected and fixed by screw thread and clamp body 4 owing to compress bullet cover 7, so jam nut 6 also moves relative to compressing bullet cover 7 directions to scroll chuck 1 simultaneously.Again because jam nut 6 is a taper seat with the mating surface that compresses bullet cover 7, and the taper seat 72 that compresses bullet cover 7 is big at the end diameter near described chuck 1, end diameter away from described chuck 1 is little, therefore at jam nut 6 when compressing bullet cover 7 directions and moving to scroll chuck 1, the diameter of bore that compresses bullet cover 7 reduces, thereby workpiece 5 is compressed and automatic centering, realize quick-clamping, just can carry out work then with lathe tool 8.Rotate jam nut 6 round about, compress bullet cover 7 and clamp under the elastic reaction at position, can unclamp workpiece 5 and hold greatly, unclamp scroll chuck 1 again, just desirablely go out workpiece 5 at itself.

Referring to Fig. 3, in order to guarantee that the clamping part elastic jacket 76 that compresses bullet cover 7 has enough elasticity, workpiece 5 easy to setup, except carrying out suitable heat treatment, when design, on structure, also to consider, compress bullet and overlap 7 structures, compressing bullet, to overlap 7 one ends are screw threads 71, the other end is the taper seat 72 of elastic jacket 76, will compress bullet and overlap 7 middle parts and open a groove 74, reduces wall thickness; Along the circumferential direction simultaneously, evenly drive several open slots 75, it is compressed or unclamp easier.

Certainly, the described chuck of present embodiment is not limited to three-jaw self-centering chuck, and clamp body also is not limited to be connected with ring flange with the connected mode of chuck.

After adopting above technical scheme, middle-size and small-size sleeve part uses this device, and is convenient, fast, improves working (machining) efficiency more than one times; Avoided owing to the unstable security incident that takes place of clamping parts; The workpiece deformation that clamping force causes too greatly when having avoided owing to clamping parts causes processing back, hole form error overproof and worker that produce is useless.

More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1, a kind of truning fixture comprises chuck and the claw that is movably connected on the chuck, and this claw clamps workpiece one end, it is characterized in that, also comprises a clamping device that is connected with chuck, to clamp the described workpiece other end;

Described clamping device comprises:

One clamp body, this clamp body one end are provided with one described clamp body are connected to ring flange on the described chuck, and the other end is provided with coaxial internal and external screw thread; The center of this clamp body is coaxial with the center of chuck;

One compresses the bullet cover, and this compresses bullet and overlaps an end and have an external screw thread, and this external thread rotary is in the internal thread of the described clamp body other end; The described other end that compresses the bullet cover has an elastic jacket in order to clamping work pieces, and the circumferential surface of described elastic jacket is an outer conical surface; The taper seat of described elastic jacket is big at the end diameter near described chuck, and is little away from an end diameter of described chuck;

2, a kind of truning fixture according to claim 1 is characterized in that, opens a groove between the taper seat of described screw thread one end that compresses bullet cover and other end elastic jacket, reduces wall thickness, to improve the elasticity of taper seat one end.

3, a kind of truning fixture according to claim 1 is characterized in that, the described bullet cover that compresses is along the circumferential direction evenly driven one or more open slots.