CN87200273U

CN87200273U - Center set

Info

Publication number: CN87200273U
Application number: CN 87200273
Authority: CN
Inventors: 申瑞鼎
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-01-10
Filing date: 1987-01-10
Publication date: 1988-01-27

Abstract

The utility model relates to a centre set which is the component for machine tools of the mechanical working. The utility model can support the parts having a complicated end face and the parts which are not allowed to have a centre hole. The center set mainly is composed of a thimble, a clamping arrangement, a casing, a fixed pin, a bearing and a mandrel. One end of the thimble can support the centre hole or the inner hole of a tubing, and the other end of the thimble can support the parts which have a spherical or conical end face. The thimble is fixed by the clamping arrangement. When the parts are not allowed to or can not have the centre hole, the turning can be directly clipped by the clamping arrangement. The casing and the mandrel are drilled with pin holes. The pinning or removing of the fixed pin can obtain the both functions of the centre set. The centre set can also be used for drilling, jacketing tooth and reaming.

Description

Center set

The utility model is the machine tool component in a kind of machining, is used for top on the tail stock.

Existing top in order to improve the machining accuracy and the scope of application, its structure more complicated, as Russian Patent SU956157 provide a kind of top because complex structure brings difficulty to processing and manufacturing, cost also increases substantially.It is a kind of top that China generally uses at present, first the 187th page of a kind of live center that provides of electronic product sample of writing in 1975 as Beijing Machinery Industry office, it mainly is made of thimble, bearing and mandrel, this top performance is single, can't use as back dead centre, and the necessary centering of workpiece, be difficult for centering and can't centering for end face, or on technology, do not allow the workpiece of centering, this toply just can't use, only by means of other frock clamp, this just makes the complicated and difficult of processing change, and has increased workload.

The purpose of this utility model just provides a kind of many with top, it both can be used as live center and had used, can be used as back dead centre again and use, can be applicable to the end surface shape complexity, be difficult to beat or part that can't centering, can satisfy the supporting of the part that does not allow centering again.

The task that the utility model proposed is finished by following measure.

The thimble of top front end, by the clamping device clamping, clamping device is three-jaw self-centering chuck or chuck, this is for no centre bore part or end face complex part, can change top end face and workpiece and adapt to, perhaps remove thimble, directly clamp workpiece with clamping device and process.Clamping device is assemblied on the housing with securing member, and housing has corresponding pin-and-hole with the mandrel that can rotate mutually, and pin is gone into steady pin, and the top back dead centre that just can be used as uses.

Advantage of the present utility model is that the scope of application is big, and is easy to use, a kind of top multiple use, and the used top workpiece that is difficult to support is top with what the utility model proposed at present, just can be resolved easily.Therefore, the utility model is processed turning, can significantly improve work efficiency.

Accompanying drawing 1 is a front view of the present utility model.

Accompanying drawing 2 is thimble cutaway views.

Thimble 1 in the accompanying drawing is fixing by clamping device clamps, and clamping device is three-jaw self-centering chuck 2 or chuck.Turning general the workpiece of centre bore is arranged the time, top evagination pointed cone 8 withstands centre bore with it outside, for tubing or have the workpiece of blind hole, available oblique spline 9 withstands the endoporus of workpiece; When the end face of workpiece is sphere or taper, unclamp claw with special spanner, with thimble tune, fastening, make the tapered blind hole 11 of the hemispherical 10 of its indent and indent outside, workpiece is supported.

For can't centering, do not allow centering and the strange shape of end face, the workpiece that thimble can't support can remove thimble, directly clamps workpiece with three-jaw self-centering chuck and carries out turning.When processing has eccentric workpiece, can change three-jaw self-centering chuck into chuck.

When workpiece needs drill centers, cover tooth and fraising, can on chuck, adorn corresponding drill bit, screw die and file, and steady pin 6 pins are gone into pin-and-hole, can finish processing.

Pin-and-hole on housing and the mandrel is gone into and is taken out for the ease of the pin of steady pin, and pin-and-hole can be processed into the bellmouth of band certain angle.When the steady pin pin that matches with pin-and-hole was gone into pin-and-hole, mandrel 7 and the housing that matches with the bearing inner/outer hole just can not relatively rotate respectively, and the top back dead centre that just becomes takes out steady pin, is live center.During use, mandrel is assemblied on the tailstock.

Claims

The general machine tool accessories of a kind of lathe is top, be attached on the housing by securing member by three-jaw self-centering chuck or chuck, is furnished with bearing between housing and the mandrel, embed cooperation with steady pin, it is characterized in that pointed cone and oblique spline that a top end is an evagination, the other end is the hemispherical and the tapered blind hole of indent.