CN212886318U

CN212886318U - Clamp for lathe hole machining

Info

Publication number: CN212886318U
Application number: CN202021502779.4U
Authority: CN
Inventors: 田广; 张云好
Original assignee: Wuhan Junchen Precision Manufacturing Co ltd
Current assignee: Wuhan Junchen Precision Manufacturing Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-04-06
Anticipated expiration: 2030-07-27

Abstract

The utility model discloses an anchor clamps for lathe spot facing work belongs to the machining anchor clamps field, anchor clamps press from both sides the body and have the internal screw thread annular clamp cover including pressing from both sides the body, press from both sides the body back end and be equipped with the bearing platform, press from both sides the body middle section and be equipped with the groove of stepping down that corresponds and treat the machined part, press from both sides the body anterior segment and be equipped with the annular thread platform that has the external screw thread to be equipped with the thin wall ring that has external taper at annular thread platform front end, annular clamp cover and annular thread platform screw-thread fit, and the width that the annular pressed from both sides the cover equals with the width that presss from both sides the body anterior segment, still be equipped with annular voussoir between thin wall ring and annular clamp cover, the outer disc of annular voussoir is equipped with the internal screw. The utility model discloses can adapt to the axostylus axostyle terminal surface trompil of different grade type to it is easy and simple to handle, and the outer disc of difficult damage work piece.

Description

Clamp for lathe hole machining

Technical Field

The utility model relates to a machining anchor clamps field especially relates to an anchor clamps are used in lathe spot facing work.

Background

The existing method for machining the end hole of the shaft part generally adopts a lathe three-jaw chuck to realize the positioning and clamping of the workpiece through the excircle of the workpiece, the three-jaw chuck has the advantages of strong universality, no need of special manufacture, high centering precision and the like, but when the three-jaw chuck is used for clamping the workpiece, the contact area between the three-jaw chuck and the machined workpiece is small, the clamping force on the unit area is large, and particularly when the wall thickness of the workpiece is thin, the workpiece is easy to clamp and deform, so that the machining quality of the workpiece is difficult to guarantee.

However, CN104647101A discloses a lathe fixture for machining an inner hole of a nut part, in which the problem of excessive deformation of the clamping force of a three-jaw chuck can be avoided by providing a thin wall of the fixture body as a positioning element and a clamping element, but the device is only suitable for shaft rod parts with smooth surfaces, in fact, the outer circular surfaces of many shaft parts are not smooth surfaces and often have annular end surfaces, and in which the taper sleeve is used as a clamping mechanism and is tightly attached to the front end of the fixture body.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a strong adaptability and be convenient for operation's anchor clamps for lathe spot facing work.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a lathe is anchor clamps for spot facing work, include the anchor clamps body of installing on the lathe main shaft through the transition dish, anchor clamps still include the annular clamp cover that has the internal thread, anchor clamps body back end is equipped with the accepting platform that is used for bearing the weight of waiting to add the workpiece tip, anchor clamps body middle section is equipped with the groove of stepping down that corresponds waiting to add the workpiece, anchor clamps body front section is equipped with the annular thread platform that has the external screw thread, and is equipped with the thin wall ring that has the external taper in annular thread platform front end, the rear end external diameter of thin wall ring is greater than its front end external diameter, and the rear end external diameter of thin wall ring is less than annular thread platform external diameter, annular clamp cover and annular thread platform screw-thread fit, and the width of annular clamp cover equals the width of anchor clamps body front section, still be equipped with annular voussoir between thin wall ring and annular clamp cover, the outer disc, the inner side of the annular wedge block is a conical surface matched with the taper of the thin-wall ring.

As the utility model discloses to above-mentioned scheme preferred, annular voussoir rear end still is equipped with the annular precession platform that the external diameter is less than its disc, is convenient for get into annular voussoir assembly between thin-walled ring and the annular jacket through the annular precession platform to the tight machined part of treating of clamp.

As the utility model discloses to above-mentioned scheme preferred, the outer disc of annular precession platform has evenly seted up the hexagonal screw, and through setting up the hexagonal screw, the workman of can being convenient for utilizes lever principle to screw the annular voussoir through instruments such as the screw rod of long handle.

As the utility model discloses to the preferred of above-mentioned scheme, the width of annular voussoir is less than the width of thin-walled ring to can make the annular voussoir get into between thin-walled ring and the annular jacket completely.

As the utility model discloses to above-mentioned scheme preferred, the anchor clamps body anterior segment still is equipped with spacing platform in annular thread platform rear end, thereby avoids leading to the accident at the clamping sleeve slippage in the course of working, has improved the security of device.

The beneficial effects of the utility model reside in that: the utility model discloses a device is in the use, through the cooperation of annular clamp cover and annular thread platform for the tapering clearance is reserved between annular clamp cover and the thin wall ring, thereby utilizes the screw-thread fit relation that annular voussoir and annular clamp cover, imbeds with annular voussoir, realizes pressing from both sides the effect of tight thin wall ring, thereby utilizes thin wall ring to press from both sides the work piece tightly.

Secondly, the utility model discloses in reserved the groove of stepping down in anchor clamps body middle section, can adapt to the axle type part of different grade type, especially the middle section has all kinds of axostylus axostyles of annular end face, has set up the accepting table at anchor clamps body back end simultaneously, can make axostylus axostyle work piece front end carry on the accepting table, avoid the work piece unstability and produce the processing accident.

And, although the utility model discloses in annular voussoir medial surface and thin wall ring be the taper fit relation, and also have great packing force between annular voussoir and the thin wall ring in the course of working, nevertheless because the outer disc of annular voussoir presss from both sides cover threaded connection with the annular to can screw out the annular through the annular precession platform and press from both sides the cover at any time, therefore the utility model provides an annular voussoir can not appear the card and die the condition in the thin wall ring outside.

Drawings

Fig. 1 is an assembly schematic diagram of the middle clamp body of the present invention.

Fig. 2 is a schematic structural diagram of the middle annular wedge block of the present invention.

The machining fixture comprises a fixture body, a clamp sleeve 2, an annular clamp sleeve 3, a bearing table, a relief groove 4, an annular thread table 5, a thin-wall ring 6, an annular wedge block 7, an annular screwing table 8, a hexagonal screw hole 9, a limiting table 10 and a workpiece to be machined 11.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1, the clamp for machining a lathe hole comprises a clamp body 1 arranged on a lathe spindle through a transition disc, the clamp further comprises an annular clamping sleeve 2 with internal threads, a bearing table 3 used for bearing the end part of a workpiece 11 to be machined is arranged at the rear section of the clamp body 1, a yielding groove 4 corresponding to the workpiece 11 to be machined is arranged at the middle section of the clamp body 1, an annular thread table 5 with external threads is arranged at the front section of the clamp body 1, a thin-wall ring 6 with external taper is arranged at the front end of the annular thread table 5, the outer diameter of the rear end of the thin-wall ring 6 is larger than that of the front end of the thin-wall ring 6, the outer diameter of the rear end of the thin-wall ring 6 is smaller than that of the annular thread table 5, the annular clamping sleeve 2 is in threaded fit with the annular thread table 5, the width of the annular clamping sleeve 2 is equal to the width of the front section of the clamp body 1 (the width is the distance between, the outer circular surface of the annular wedge 7 is provided with an external thread matched with the internal thread of the annular jacket 2, and the inner side of the annular wedge 7 is a conical surface matched with the thin-wall ring 6 in taper.

In this embodiment, the rear end of the annular wedge 7 is further provided with an annular precession table 8 having an outer diameter smaller than the outer circumferential surface thereof, and the annular wedge 7 is easily fitted between the thin-walled ring 6 and the annular collet by the annular precession table 8, thereby clamping the member to be machined 11.

In this embodiment, hexagonal screw holes 9 are evenly opened on the outer circular surface of the annular precession table 8, and by means of the hexagonal screw holes 9, a worker can conveniently screw the annular wedge 7 by using a lever principle through tools such as a screw with a long handle.

In the present embodiment, the width of the annular wedge 7 is smaller than the width of the thin-walled ring 6, so that the annular wedge 7 can be completely inserted between the thin-walled ring 6 and the annular jacket 2.

In this embodiment, the front section of the fixture body 1 is further provided with a limiting table 10 at the rear end of the annular thread table 5, so that accidents caused by the slipping of the annular jacket 2 in the machining process are avoided, and the safety of the device is improved.

The utility model discloses add man-hour, press from both sides the cooperation of cover 2 and annular thread platform 5 through the annular for the annular presss from both sides the reservation tapering clearance between cover 2 and the thin wall ring 6, thereby utilizes annular voussoir 7 and the annular to press from both sides the screw-thread fit relation that overlaps 2, imbeds annular voussoir 7, realizes pressing from both sides the effect of tight thin wall ring 6, thereby utilizes thin wall ring 6 will treat that machined part 11 presss from both sides tightly.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. A clamp for machining a lathe hole comprises a clamp body arranged on a lathe spindle through a transition disc, and is characterized by further comprising an annular clamping sleeve with internal threads, wherein a bearing platform used for bearing the end part of a workpiece to be machined is arranged at the rear section of the clamp body, a abdicating groove corresponding to the workpiece to be machined is arranged at the middle section of the clamp body, an annular thread platform with external threads is arranged at the front section of the clamp body, a thin-wall ring with external taper is arranged at the front end of the annular thread platform, the outer diameter of the rear end of the thin-wall ring is larger than that of the front end of the thin-wall ring, the outer diameter of the rear end of the thin-wall ring is smaller than that of the annular thread platform, the annular clamping sleeve is in threaded fit with the annular thread platform, the width of the annular clamping sleeve is equal to that of the front section of the clamp body, an annular wedge block is further arranged between, the inner side of the annular wedge block is a conical surface matched with the taper of the thin-wall ring.

2. The jig for lathe boring as claimed in claim 1, wherein the annular wedge is further provided at a rear end thereof with an annular precession table having an outer diameter smaller than an outer circumferential surface thereof.

3. The jig for lathe hole machining according to claim 2, wherein hexagonal screw holes are uniformly formed in the outer circumferential surface of the annular precession table.

4. The jig for lathe boring as set forth in claim 1, wherein the annular wedge has a width smaller than that of the thin-walled ring.

5. The jig for lathe boring as claimed in claim 1, wherein the front section of the jig body is further provided with a stopper at a rear end of the annular screw table.