CN212886398U

CN212886398U - Clamp for lathe

Info

Publication number: CN212886398U
Application number: CN202021503543.2U
Authority: CN
Inventors: 田广; 胡新宇
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 a clamp for lathes, belonging to the field of lathe clamps, comprising a connecting head, a conical jacket, a clamping claw and an operation panel. There are threaded teeth on the inner conical surface of the conical jacket, and the clamping jaws are provided with helical teeth that match the taper of the threaded teeth, and the arc-shaped end faces of each clamping jaw together form a clamping substitute for machining The center of the operating panel is provided with a circular opening, and its front end surface is evenly provided with a bar-shaped chute corresponding to the clamping jaws along the radial direction, and the clamp also includes an annular insert, The annular insert can be embedded in the circular through opening, and the annular insert is provided with a limiting column corresponding to the bar-shaped chute. The utility model has the advantages of good processing effect and convenient use, which can not only realize the clamping of the long-axis workpiece on the lathe, but also avoid the problem of the workpiece coming out during the processing.

Description

Clamp for lathe

Technical Field

The utility model relates to a turning attachment field especially relates to an anchor clamps for lathe.

Background

The lathe fixture is used for processing inner and outer revolution surfaces and end surfaces of a workpiece on a lathe, and positioning of the workpiece during processing is an important link. At present, when three-jaw chucks are used for clamping and producing large-batch parts on a machine tool, when the three-jaw chucks are used for positioning, only positioning disc parts or hole parts can be processed, the positioning capability of some shaft part clamps is reduced, for example, the extending length of some shafts is too long, the workpiece rigidity is insufficient during processing, the deviation is generated, the precision is difficult to guarantee, the original design requirement cannot be met, the rejection rate is greatly improved, and the working efficiency of operators is reduced. Chinese patent CN108907835A discloses a fixture positioning device for lathe, which includes a connector, a clamping jaw, etc., although it can change the space size of the clamping jaw by rotating the clamping jaw, and can be applied to the processing of long shaft, however, this structure can't play a good fixing effect after clamping the workpiece, and lathe processing is accompanied with the rotation told, the clamping jaw is very easy to deviate, resulting in the workpiece to deviate from the fixture, generating a great processing risk, and its clamping jaw has a large clamping force in the using process, easily resulting in the connecting rod to deform, etc.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anchor clamps for lathe, it can enough realize the clamping to the major axis work piece on the lathe, can avoid the problem that the work piece is deviate from again in the course of working.

In order to solve the above problem, the utility model adopts the following technical scheme:

the utility model provides a lathe fixture, including connector, toper clamp sleeve, clamping jaw and operation panel, the inside work piece socket that is equipped with of connector, the connector is the hollow tubular structure that one end has the screwed joint, the toper clamp sleeve is loudspeaker-shaped's toper structure, connector one end with the little one end cooperation of toper clamp sleeve diameter is connected, set up the thread tooth on the inboard conical surface of toper clamp sleeve, the clamping jaw is equipped with three, and evenly attached on the inboard conical surface of toper clamp sleeve, and be equipped with on the clamping jaw with the skewed tooth portion that the thread tooth tapering matches, the clamping jaw is equipped with the arc terminal surface at the opposite side relative to the skewed tooth portion, and the arc terminal surface of each clamping jaw forms the clamping mouth of centre gripping generation machined part jointly;

a circular through hole is formed in the center of the operating plate, a strip-shaped sliding groove corresponding to the clamping jaw is uniformly formed in the front end face of the operating plate in the radius direction, one end of the strip-shaped sliding groove is communicated with the circular through hole, the clamping jaw is horizontally connected with a connecting rod, and the other end of the connecting rod is embedded into the strip-shaped sliding groove and can slide along the strip-shaped sliding groove;

the anchor clamps still include annular abaculus, the annular abaculus is formed by three the same arc abaculus concatenations, and the adjacent arc abaculus link passes through the screw sleeve to be fixed, the annular abaculus can imbed in the circular opening to the annular abaculus corresponds the bar spout and is provided with spacing post.

As the utility model discloses to above-mentioned scheme preferred, the bar spout is the recess of "protruding" form for the cross-section, and when the structure through the bar spout can make the rotatory operation panel, along with the clamping claw deepens the toper and presss from both sides the cover, the connecting rod can move towards operation panel centre of a circle department along the bar spout.

As the utility model discloses to above-mentioned scheme preferred, threaded sleeve is straight section of thick bamboo structure, and its diameter is less than the diameter of arc abaculus, avoids threaded sleeve to collide with treating the machined part that passes in the annular abaculus at the clamping in-process.

As the utility model discloses to above-mentioned scheme preferred, spacing post is including spacing post casing and gliding spacing head in it, and is equipped with the bullet spring that pushes up the contact spacing head in the spacing post casing, give the certain elasticity of connecting rod through bullet spring to make the clamping claw of its front end can not need not the workman to support and press from both sides the cover internal rotation at the toper freely, meanwhile, when the clamping claw presss from both sides tightly treats the machined part, bullet spring can provide certain elasticity, thereby the tight clamping jaw in top, make the clamping effect better.

The beneficial effects of the utility model reside in that: the device can be suitable for processing long shaft workpieces, when in processing, the connector is firstly clamped in a three-jaw chuck of a lathe, then the workpiece to be processed is inserted into the clamping opening through the circular opening of the operating panel and is finally inserted into the workpiece inserting opening in the connecting head, then the position of the clamping jaw is adjusted by rotating the operating panel, the inner diameter of the clamping jaw formed by the three clamping jaws is gradually reduced as the clamping jaw goes deep into the conical jacket, conversely, the operating panel is rotated to enable the clamping claw to rotate out of the conical jacket, meanwhile, the limiting column props against the tail end of the connecting rod to support the clamping claw, the inner diameter of the clamping mouth formed by the three clamping jaws is gradually enlarged, therefore, the utility model has simple operation, and can effectively avoid the loosening of the clamping jaws once the processing is started after the clamping, the machining tool can adapt to shaft workpieces with different diameters within a certain size range, and is high in adaptability and good in machining effect.

Drawings

Fig. 1 is an assembly structure diagram of the present invention.

Fig. 2 is a schematic view of the plane a-a in fig. 1.

Fig. 3 is a schematic structural view of the middle ring-shaped insert of the present invention.

Fig. 4 is a schematic view of the middle position-limiting column of the present invention.

The clamping device comprises a connector 1, a conical clamping sleeve 2, a clamping jaw 3, an operation plate 4, a workpiece socket 5, a threaded joint 6, an arc-shaped end face 7, a clamping opening 8, a circular opening 9, a strip-shaped sliding groove 10, a connecting rod 11, an annular insert 12, an arc-shaped insert 13, a threaded sleeve 14, a limiting column 15, a limiting column shell 16, a limiting head 17 and an ejection spring 18.

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.

The fixture for the lathe shown in fig. 1-4 comprises a connector 1, a conical jacket 2, clamping claws 3 and an operating panel 4, wherein a workpiece socket 5 is arranged inside the connector 1, the connector 1 is of a hollow cylindrical structure with a threaded joint 6 at one end, the conical jacket 2 is of a horn-shaped conical structure, one end of the connector 1 is in fit connection with one end of the conical jacket 2 with a small diameter, threaded teeth are formed on the conical surface on the inner side of the conical jacket 2, three clamping claws 3 are arranged and uniformly attached to the conical surface on the inner side of the conical jacket 2, inclined tooth parts matched with the taper of the threaded teeth are arranged on the clamping claws 3, an arc-shaped end surface 7 is arranged on the other side of the clamping claws 3 relative to the inclined tooth parts, and the arc-shaped end surfaces 7 of the clamping claws 3 jointly form a clamping opening 8 for clamping a workpiece;

a circular through hole 9 is formed in the center of the operating plate 4, a strip-shaped sliding groove 10 corresponding to the clamping jaw 3 is uniformly formed in the front end face of the operating plate along the radius direction, one end of the strip-shaped sliding groove 10 is communicated with the circular through hole 9, the clamping jaw 3 is horizontally connected with a connecting rod 11, and the other end of the connecting rod 11 is embedded into the strip-shaped sliding groove 10 and can slide along the strip-shaped sliding groove 10;

the anchor clamps still include annular abaculus 12, annular abaculus 12 is formed by the concatenation of three the same arc abaculus 13, and the 13 link of adjacent arc abaculus passes through threaded sleeve 14 fixedly, annular abaculus 13 can imbed in circular opening 9 to annular abaculus 12 corresponds bar spout 10 and is provided with spacing post 15.

In this embodiment, the bar-shaped sliding groove 10 is a groove with a convex cross section, and when the operating panel 4 is rotated by the structure of the bar-shaped sliding groove 10, the connecting rod 11 can move towards the center of the operating panel 4 along the bar-shaped sliding groove 10 as the clamping jaw 3 goes deep into the tapered clamping sleeve 2.

In this embodiment, the threaded sleeve 14 is a straight-tube structure, and the diameter of the threaded sleeve is smaller than that of the arc-shaped insert 13, so that the threaded sleeve 14 is prevented from colliding with a workpiece to be machined, which passes through the annular insert 12, in the clamping process.

In this embodiment, the limiting column 15 includes a limiting column casing 16 and a limiting head 17 sliding therein, and an elastic ejection spring 18 abutting against the limiting head 17 is arranged in the limiting column casing 16, and the elastic ejection spring 18 gives a certain elastic force to the connecting rod 11, so that the clamping claw 3 at the front end of the clamping claw can freely rotate in the conical jacket 2 without being supported by a worker, and meanwhile, when the clamping claw 3 clamps a workpiece to be machined, the elastic ejection spring 18 can provide a certain elastic force, so that the clamping claw 3 is tightly supported, and the clamping effect is better.

The utility model can be used for processing long shaft workpieces, when processing, firstly the connector 1 is clamped in a three-jaw chuck of a lathe, then a workpiece to be processed extends into a clamping opening 8 through a circular opening 9 of an operating panel 4 and is finally inserted into a workpiece socket 5 in the connector 1, then the position of the clamping jaw 3 is adjusted by rotating the operating panel 4, along with the clamping jaw 3 going deep into a conical jacket 2, the inner diameter of the clamping opening 8 formed by the three clamping jaws 3 is gradually reduced until the workpiece to be processed is clamped, when the workpiece to be processed is clamped by the clamping jaw 3, the spring ejection spring 18 generates elasticity to the connecting rod 11, namely the clamping jaw 3, thereby tightly ejecting the clamping jaw 3, avoiding the clamping jaw 3 from loosening in the processing process, and otherwise, the operating panel 4 is rotated to enable the clamping jaw 3 to rotate out of the conical jacket 2, meanwhile, the limiting column 15 ejects the tail end of the connecting rod 11 to support the clamping jaw 3, so that the clamping opening 8 can be continuously opened, the inner diameter of a clamping opening 8 formed by the three clamping jaws 3 is gradually expanded, and the workpiece can be taken out at the moment to finish the machining process.

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 lathe clamp, comprising a connecting head, a conical jacket, a clamping claw and an operating panel, the connecting head is provided with a workpiece socket inside, it is characterized in that, the connecting head is a hollow with a threaded joint at one end Cylindrical structure, the conical jacket is a horn-shaped conical structure, one end of the connecting head is matched and connected with the end with a small diameter of the conical jacket, and a thread is opened on the inner conical surface of the conical jacket There are three clamping claws, and they are evenly attached to the inner conical surface of the conical jacket, and the clamping claw is provided with a helical tooth that matches the taper of the threaded teeth. The claw is provided with an arc-shaped end face on the other side relative to the helical tooth portion, and the arc-shaped end face of each clamping claw together forms a clamping opening for clamping the substitute workpiece;

The center of the operation panel is provided with a circular opening, and its front end surface is evenly provided with a bar-shaped chute corresponding to the clamping claws along the radial direction, and one end of the strip-shaped chute is connected to the circular opening, and the clamping claws are installed. A connecting rod is horizontally connected, and the other end of the connecting rod is embedded in the bar-shaped chute and can slide along the bar-shaped chute;

The clamp also includes an annular insert, which is formed by splicing three identical arc inserts, and the connecting ends of the adjacent arc inserts are fixed by a threaded sleeve, and the annular insert can be embedded In the circular through port, and the annular insert block is provided with a limiting column corresponding to the bar-shaped chute.

2 . The fixture for a lathe according to claim 1 , wherein the bar-shaped chute is a groove with a “convex” cross-section. 3 .

3 . The jig for a lathe according to claim 1 , wherein the threaded sleeve is of a straight cylindrical structure, and its diameter is smaller than that of the arc-shaped insert. 4 .

4 . The clamp for a lathe according to claim 1 , wherein the limit column comprises a limit column housing and a limit head sliding therein, and a top contact limiter is provided in the limit column shell. 5 . Bit head spring top spring.