CN211276566U

CN211276566U - Back-pull collet chuck clamping device

Info

Publication number: CN211276566U
Application number: CN201922429549.3U
Authority: CN
Inventors: 陈桥弃
Original assignee: Chongqing Taiwo Machinery Manufacturing Co ltd
Current assignee: Chongqing Taiwo Machinery Manufacturing Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-08-18
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a draw collet chuck fixture device after, draw collet chuck holder after including the level setting, draw collet chuck holder after to link up the setting, draw collet chuck holder afterbody and lathe spindle drive to be connected after, draw collet chuck holder front portion after to be provided with the conical surface, draw collet chuck after sliding fit has in the collet chuck holder after, the front end that draws the collet chuck after is provided with female claw, female claw's lateral wall with draw collet chuck's conical surface after to match, draw collet chuck holder's front end terminal surface fixed mounting after has the end cover, be provided with on the end cover and hold the gliding fluting of female claw, fixed mounting has high spud pile and work piece locating pin on the outside terminal surface of end cover. The utility model has the advantages of stable clamping and accurate positioning.

Description

Back-pull collet chuck clamping device

Technical Field

The utility model relates to the technical field of machining, especially, relate to a back pull collet chuck fixture device.

Background

Clamping jaws are the most important parts in lathe machining, can stably clamp workpieces, and guarantee the stability of the workpieces in the machining process and further guarantee the machining size.

Draw collet chuck anchor clamps after can realize accurate centering, the stable function of centre gripping, but when carrying out the centre gripping to the big terminal surface of flange work piece, with the major circle external diameter as adding the holding face, because there is the step hole in drawing collet chuck after, produce easily and pile up iron fillings, when assembling the flange, probably there is female claw to rock, and then the axiality and the wall thickness that lead to the work piece are bad, especially when automation equipment carries out the work piece installation, still can have the condition such as bumping the machine, be unfavorable for the use of equipment, and go on smoothly of processing.

SUMMERY OF THE UTILITY MODEL

To the deficiency of the prior art, the technical problem to be solved by the present patent application is: how to provide a back pull collet chuck device with stable clamping and accurate positioning.

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

a rear-pulling collet chuck fixture device comprises a rear-pulling collet chuck seat which is horizontally arranged, the rear-pulling collet chuck seat is communicated, the tail of the rear-pulling collet chuck seat is in transmission connection with a machine tool spindle, a conical surface is arranged at the front part of the rear-pulling collet chuck seat, a rear-pulling collet chuck is arranged in the rear-pulling collet chuck seat in a sliding fit mode, a female claw is arranged at the front end of the rear-pulling collet chuck, the outer side wall of the female claw is matched with the conical surface of the rear-pulling collet chuck seat, an end cover is fixedly arranged on the front end face of the rear-pulling collet chuck seat, a groove for accommodating the female claw in a sliding mode is formed in the end cover, and a height positioning pile and a workpiece positioning pin are fixedly mounted on the.

When the positioning device is used, a workpiece is placed between the female claws to perform rough positioning, horizontal thrust is continuously applied, the end face of the workpiece moves towards the end cover, a workpiece positioning pin on the end cover is inserted into a positioning hole on the workpiece to complete the positioning and the limiting of the workpiece in the rotation direction, the workpiece is continuously pushed to enable the end face of the workpiece to be in contact with a height positioning pile arranged on the end face, and the height positioning pile limits and positions the position of the workpiece in the horizontal direction, so that a height difference is formed between the height positioning pile and the end cover, the generated scrap iron has a certain accommodating space and cannot influence the assembly of the workpiece, after the positioning is completed, a hydraulic cylinder on a machine tool drives the rear pulling collet chuck to move towards the machine tool, the female claws on the rear pulling collet chuck move along with the rear jaw after being subjected to tension, the outer side wall is influenced by a conical surface on a rear pulling collet chuck seat and gathers towards the, and then, the workpiece can be machined by rotating along with the main shaft. The utility model discloses under the guarantee heart and the tight prerequisite of clamp, realized the direction of rotation location and the horizontal direction location to the work piece, ensured the work piece simultaneously and pulled the axiality between the collet chuck backward, got rid of external influence, guarantee processingquality.

Preferably, the height positioning pile comprises a threaded pin arranged towards the end cover, the threaded pin is matched with a threaded hole in the end cover, and a cushion block is coaxially and fixedly mounted at one end, far away from the end cover, of the threaded pin.

Like this, the cushion provides a location basis for the work piece for the terminal surface of work piece can with the cushion contact, realizes the location of horizontal direction, and the threaded pin can realize with the stable connection of end cover.

Preferably, the height positioning piles comprise at least four height positioning piles, and the surface of the cushion block on each height positioning pile is located on the same plane.

Like this, lie in the coplanar, can realize the accurate installation of work piece, be favorable to the machining precision, set up a plurality of height positioning stake, can avoid the work piece to produce the skew.

Preferably, the positioning pins comprise at least three positioning pins, and the positioning pins are arranged right opposite to the workpiece.

Like this, the location of locating pin is more accurate, can carry out effectual spacing to the work piece simultaneously, and in the guarantee course of working, the stability of work piece can not produce rotatoryly.

Preferably, the rear pull collet comprises a sliding part and a clamping part, the sliding part is slidably mounted on the inner side wall of the rear pull collet holder, the clamping part comprises a mounting block fixedly connected with the end part of the sliding part, the mounting block is externally and fixedly provided with the female claw, and a gap is formed between every two mounting blocks.

Like this, it is more stable to slide, and the centre gripping between the female claw is more firm stable, and the clearance sets up in order to provide a shrinkage for female claw, avoids producing the female claw deformation that excessive extrusion caused.

Preferably, the gap is in the range of 1-3 mm.

Thus, the moving amount of the female claw can be provided without influencing the strength of the whole structure.

Preferably, the end cover is further provided with a mistake-proofing pin.

Like this, when assembling the work piece, can have an installation basis for the cooperation between work piece and the end cover and the cooperation between work piece and the female claw are inseparabler, prevent the condition that the work piece misplaced.

Description of the drawings:

fig. 1 is a schematic structural view (workpiece clamping state) of the back-pull collet chuck device disclosed in the present invention.

FIG. 2 is a schematic view of the structure of the pull-back collet chuck device.

Fig. 3 is a schematic structural view of the rear slide holder in fig. 2.

Fig. 4 is a schematic view of the structure of the pull-back collet of fig. 2.

FIG. 5 is a schematic view of the end cap of FIG. 2 with the height stake and the work piece locator pin.

Fig. 6 is a schematic structural view of the height positioning pile.

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.

Referring to fig. 1-6, a back-pull collet chuck fixture device comprises a back-pull collet chuck holder 1 horizontally arranged, the back-pull collet chuck holder 1 is arranged in a through manner, the tail of the back-pull collet chuck holder 1 is in transmission connection with a machine tool spindle, a tapered surface 11 is arranged at the front of the back-pull collet chuck holder 1, a back-pull collet chuck is arranged in the back-pull collet chuck holder 1 in a sliding fit manner, a female claw 13 is arranged at the front end of the back-pull collet chuck, the outer side wall of the female claw 13 is matched with the tapered surface of the back-pull collet chuck holder 1, an end cover 14 is fixedly arranged on the front end surface of the back-pull collet chuck holder 1, a slot 15 for accommodating the female claw 13 to slide is formed in the end cover 14, and a height positioning pile and a workpiece positioning pin 16 are fixedly arranged on the outward end.

In this embodiment, the height positioning pile includes a threaded pin 17 disposed toward the end cover, the threaded pin 17 is engaged with a threaded hole on the end cover 14, and a cushion block 18 is coaxially and fixedly mounted at one end of the threaded pin 17 away from the end cover 14.

In this embodiment, the height-positioning piles include at least four height-positioning piles, and the surfaces of the cushion blocks 18 on each height-positioning pile are located on the same plane.

In this embodiment, the number of the positioning pins 16 is at least three, and the positioning pins 16 are disposed opposite to the workpiece.

In this embodiment, the rear pull collet includes a sliding portion 121 and a clamping portion, the sliding portion 121 is slidably mounted on an inner side wall of the rear pull collet holder 1, the clamping portion includes a mounting block 122 fixedly connected with an end portion of the sliding portion 121, the female claw 13 is fixedly mounted on the mounting block 122 outward, and a gap is provided between each mounting block 122.

In this embodiment, the gap is in the range of 1-3 mm.

In this embodiment, the end cap 14 is further provided with a mistake-proof pin 19.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A pull-back collet chuck device which characterized in that: the rear pull cylinder clamping seat is horizontally arranged, the rear pull cylinder clamping seat is communicated, the tail of the rear pull cylinder clamping seat is in transmission connection with a machine tool spindle, a conical surface is arranged at the front part of the rear pull cylinder clamping seat, a rear pull cylinder is arranged in the rear pull cylinder clamping seat in a sliding fit mode, a female claw is arranged at the front end of the rear pull cylinder, the outer side wall of the female claw is matched with the conical surface of the rear pull cylinder clamping seat, an end cover is fixedly arranged on the front end face of the rear pull cylinder clamping seat, a groove for accommodating the female claw in a sliding mode is formed in the end cover, and a height positioning pile and a workpiece positioning pin are fixedly arranged on the outward end face of the end cover.

2. A pull-back collet chuck device as in claim 1, wherein said height positioning pegs comprise threaded pins disposed toward said end cap, said threaded pins engaging threaded holes in said end cap, and a spacer is coaxially fixedly mounted on an end of said threaded pins remote from said end cap.

3. A pull-back collet chuck device as in claim 2, wherein said height-locating pegs include at least four, and wherein the surface of the spacer block on each of said height-locating pegs is in the same plane.

4. A pull-back collet chuck device as in claim 3, wherein said alignment pins comprise at least three, said alignment pins being disposed against the workpiece.

5. The pull-back collet chuck device as claimed in claim 4, wherein the pull-back collet includes a sliding portion and a clamping portion, the sliding portion is slidably mounted on the inner sidewall of the pull-back collet chuck seat, the clamping portion includes a mounting block fixedly connected with the end of the sliding portion, the mounting block is externally and fixedly mounted with the female claw, and a gap is provided between each mounting block.

6. A pull-back collet chuck device as in claim 5, wherein said gap is in the range of 1-3 mm.

7. A pull-back collet chuck device as in claim 6, wherein said end cap is further provided with a mistake proofing pin.