CN216326504U

CN216326504U - Positioning tool for lathe

Info

Publication number: CN216326504U
Application number: CN202123090884.9U
Authority: CN
Inventors: 王莉辉; 黄化
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-04-19
Anticipated expiration: 2031-12-10

Abstract

The utility model provides a positioning tool for a lathe, which clamps the tail end of a slender shaft by arranging a movable positioning disc to ensure the coaxiality of workpieces, and adopts the technical scheme that the positioning tool comprises the lathe, wherein a three-jaw chuck is arranged at the output end of a main shaft of the lathe, the positioning disc is transversely and slidably connected with the lathe, the axis of the positioning disc is superposed with the axis of the main shaft of the lathe and the axis of the three-jaw chuck, a positioning hole is coaxially arranged in the positioning disc, a rotating disc which coaxially rotates in the positioning disc is driven by matching of a worm gear and a worm in the positioning disc, a plurality of arc-shaped grooves are uniformly formed in the rotating disc along the circumference, sliding plates are matched with each arc-shaped groove through a notch, a plurality of linear grooves are uniformly formed in the positioning disc along the circumference, each sliding plate is slidably connected in the corresponding linear groove, a probe rod is connected in each sliding plate through a spring, and the output end of each probe rod is spherically hinged with a probe ball, the utility model can conveniently and effectively position the slender shaft workpiece and ensure the coaxiality of the workpiece.

Description

Positioning tool for lathe

Technical Field

The utility model relates to a positioning tool, in particular to a positioning tool for a lathe.

Background

Slender axles work piece is common lathe work piece, but because slender axles work piece rigidity is poor, if the clamping is improper during the turning, take place bending deformation because of cutting force and the effect of gravity very easily, produce the vibration to influence machining precision and roughness, even the clamping must also take place the runout because of gravity and centrifugal force effect as the end of slender axles, influence the machining precision of work piece and still probably cause the damage of cutter, the current traditional clamping mode of turning slender axles adoption on the lathe mainly has two kinds: one mode is that one end of the slender shaft is clamped by a chuck, and the other end is supported by a tailstock center of a lathe; the other mode is that both ends of the slender shaft are supported by the center, the two traditional clamping modes can enable the workpiece to be accurately positioned and ensure the coaxiality, but the clamping mode needs to arrange a center hole at the tail end of the slender shaft workpiece for being matched with the center of a lathe tailstock, the operation is complex, and in the clamping mode, if the center of the lathe tailstock center is too tight, the slender shaft can be bent to affect the machining precision of the workpiece.

SUMMERY OF THE UTILITY MODEL

Aiming at the situation and overcoming the defects of the prior art, the utility model provides the positioning tool for the lathe, the coaxiality of workpieces is ensured by clamping the tail end of the slender shaft through the movable positioning disc, whether the slender shaft is clamped in place or not can be detected through the arranged probe rod so as to be adjusted in time, the tail end of the slender shaft is positioned and clamped through the probe balls, and the damage to the surfaces of the workpieces caused by positioning and clamping is reduced because the tail end of the slender shaft and each probe ball are point contacts.

The technical scheme of its solution is, including the lathe, the lathe main shaft output is equipped with three-jaw chuck, its characterized in that still includes the positioning disk of horizontal sliding connection on the lathe, positioning disk axis and lathe main shaft and three-jaw chuck axis coincidence, the inside coaxial locating hole of having seted up of positioning disk, it has the coaxial pivoted rotary disk in the positioning disk through worm gear cooperation drive, evenly there are a plurality of arc walls along the circumference on the rotary disk, each arc wall all has the sliding plate through the notch cooperation, a plurality of straight line grooves have evenly been seted up along the circumference in the positioning disk, the equal sliding connection of each sliding plate is in corresponding straight line groove, inside all there is the gliding probe rod in the sliding plate through spring coupling of each sliding plate, the equal ball joint of each probe rod output has the probe ball.

Preferably, each linear groove is communicated with the positioning hole, and the direction of each linear groove towards the positioning hole is perpendicular to the axial direction of the positioning disc.

Preferably, the axes of the probe rods are perpendicular to the axial direction of the positioning plate.

Preferably, the output end of each sliding plate is fixedly connected with a graduated scale, and one side of each probe rod is fixedly connected with a pointer matched with the corresponding graduated scale.

Preferably, a through hole matched with the positioning hole is coaxially formed in the rotating disc, a plurality of worm gear teeth are fixedly connected to the circumferential side wall of the rotating disc, a driving worm rotating in the positioning disc is matched with the worm gear teeth, and the driving worm is fixedly connected with a rocking handle extending out of the positioning disc.

Preferably, each of the probe balls extends out of the inside of the corresponding sliding plate in an initial state.

The utility model has the beneficial effects that:

1. the coaxiality of workpieces is ensured by clamping the tail end of the slender shaft through the movable positioning disc;

2. whether the slender shaft is clamped in place or not can be detected through the arranged probe rod so as to be adjusted in time;

3. the tail end of the slender shaft is positioned and clamped through the probe balls, and the damage of the positioning and clamping to the surface of a workpiece is reduced because the tail end of the slender shaft and each probe ball are in point contact.

Drawings

FIG. 1 is a first perspective view of the present invention.

FIG. 2 is a schematic view of a puck device according to the present invention.

Fig. 3 is a partial sectional view of the internal structure of the positioning disk device of the present invention.

Fig. 4 is a schematic view of the rotating disc and sliding plate apparatus of the present invention.

Fig. 5 is a partially enlarged view of fig. 3.

FIG. 6 is a schematic view of a rotating disk device according to the present invention.

Fig. 7 is a schematic view of the sliding panel apparatus of the present invention.

Fig. 8 is a schematic view of the probe rod and the ball detecting device of the utility model.

Reference numerals

1. The lathe comprises a lathe body, 2 parts of a three-jaw chuck, 3 parts of a positioning disc, 4 parts of a positioning hole, 5 parts of a rotating disc, 6 parts of an arc-shaped groove, 7 parts of a sliding plate, 8 parts of a linear groove, 9 parts of a probe rod, 10 parts of a probe ball, 11 parts of a graduated scale, 12 parts of a pointer, 13 parts of a through hole, 14 parts of worm gear teeth, 15 parts of a driving worm and 16 parts of a rocking handle.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings 1 to 8.

When the utility model is used, one end of a slender shaft workpiece is positioned and clamped through a three-jaw chuck 2 at the output end of a main shaft of a lathe 1, a positioning disc 3 which is transversely connected in a sliding manner on the lathe 1 is moved to a proper position, so that a part to be processed at the tail end of the slender shaft workpiece passes through a positioning hole 4 which is coaxially arranged in the positioning disc 3 to be exposed, a rotating disc 5 which coaxially rotates in the positioning disc 3 is driven in the positioning disc 3 through a worm gear, a through hole 13 which is matched with the positioning hole 4 is coaxially arranged in the rotating disc 5, the tail end of the slender shaft workpiece passes through the positioning hole 4 and also passes through the through hole 13, a plurality of worm gear teeth 14 are fixedly connected on the circumferential side wall of the rotating disc 5, a driving worm 15 which rotates in the positioning disc 3 is matched with the worm gear teeth 14, a rocking handle 16 which extends out of the positioning disc 3 is fixedly connected with the driving worm 15, and a plurality of arc-shaped grooves 6 are uniformly formed on the rotating disc 5 along the circumference, each arc-shaped groove 6 is matched with a sliding plate 7 through a notch, a plurality of linear grooves 8 are uniformly arranged in the positioning disc 3 along the circumference, each linear groove 8 is communicated with the positioning hole 4, each linear groove 8 is perpendicular to the axial direction of the positioning disc 3 towards the positioning hole 4, each sliding plate 7 is slidably connected in the corresponding linear groove 8, each sliding plate 7 is internally connected with a probe rod 9 sliding in the sliding plate 7 through a spring, the axial direction of each probe rod 9 is perpendicular to the axial direction of the positioning disc 3, the output end of each probe rod 9 is hinged with a probe ball 10, the output end of each sliding plate 7 is fixedly connected with a graduated scale 11, one side of each probe rod 9 is fixedly connected with a pointer 12 matched with the corresponding graduated scale 11, each probe ball 10 extends out of the corresponding sliding plate 7 in an initial state, and then a rocking handle 16 is rotated to drive a worm 15 to rotate, the driving worm 15 rotates to be matched with the worm gear teeth 14 to drive the rotating disc 5 to rotate, the rotating disc 5 drives each sliding plate 7 to slide towards the direction of the positioning hole 4 in the corresponding linear groove 8 in a rotating mode, each detection rod 9 partially extends out of the corresponding sliding plate 7 under the action of the spring force between each detection rod 9 and the corresponding sliding plate 7, the extending amount of each detection rod 9 is the same, therefore, the corresponding detection ball 10 extends out of the corresponding sliding plate 7 and is the same, each detection ball 10 gradually approaches the circumferential surface of the slender shaft workpiece in the process that each sliding plate 7 moves towards the direction of the positioning hole 4, when the detection ball 10 just contacts the circumferential surface of the slender shaft workpiece, the rocking handle 16 stops rotating to stop the driving worm 15, the driving worm 15 stops rotating to stop rotating the rotating disc 5 with the worm gear teeth 14, and due to the self-locking performance of the worm gear, the rotating disc 5 with the worm gear teeth 14 rotates and can not drive the driving worm 15 to rotate, so that a certain positioning effect is achieved, namely when the driving worm 15 stops rotating, the rotating disc 5 with the worm gear teeth 14 stops rotating and the rotating disc 5 can not rotate reversely, at the moment, each detection ball 10 just contacts the circumferential surface of the slender shaft workpiece, because the axis of the positioning disc 3 is overlapped with the axis of the lathe 1 spindle and the three-jaw chuck 2, whether the slender shaft workpiece is clamped in place and is coaxial with the lathe 1 spindle can be judged by observing whether the position of the pointer 12 on each detection rod 9 relative to the scale 11 on the corresponding sliding plate 7 is consistent, if the position of the pointer 12 on each detection rod 9 relative to the scale 11 on the corresponding sliding plate 7 is inconsistent, the three-jaw chuck 2 cannot clamp the workpiece in place, so that the workpiece is not coaxial with the lathe 1 spindle, the lathe 1 spindle can also be operated at a low speed to drive the three-jaw chuck 2 to drive the workpiece to rotate at a low speed, whether the pointer 12 on each probe 9 jumps relative to the position of the scale 11 on the corresponding sliding plate 7 can be observed to judge whether the slender shaft workpiece is clamped in place and is coaxial with the spindle of the lathe 1, if the pointer 12 on each probe 9 is observed to be inconsistent relative to the position of the scale 11 on the corresponding sliding plate 7 or the pointer 12 on each probe 9 jumps relative to the position of the scale 11 on the corresponding sliding plate 7, the three-jaw chuck 2 is adjusted to perform positioning and clamping on one end of the workpiece again until the pointer 12 on each probe 9 is consistent relative to the position of the scale 11 on the corresponding sliding plate 7 and the pointer 12 on each probe 9 does not jump relative to the position of the scale 11 on the corresponding sliding plate 7 when the spindle of the lathe 1 runs at a low speed, at the moment, the workpiece is positioned through the three-jaw chuck 2 and the positioning disc 3, and the coaxiality of the workpiece and the main shaft of the lathe 1 is ensured.

Then the rocking handle 16 is rotated continuously to enable the driving worm 15 to rotate continuously, the driving worm 15 rotates to be matched with the worm gear 14 to drive the rotating disc 5 to rotate, the rotating disc 5 rotates to drive each sliding plate 7 to slide continuously in the direction of the positioning hole 4 in the corresponding linear groove 8, at the moment, each detection ball 10 and each detection rod 9 do not move continuously in the direction of the positioning hole 4 because each detection ball 10 contacts the circumferential surface of the slender shaft workpiece, each sliding plate 7 moves close to the corresponding detection rod 9 by overcoming the spring elastic force between each sliding plate 7 and the corresponding detection rod 9 because each sliding plate 7 slides continuously in the direction of the positioning hole 4 until the spring compression between each sliding plate 7 and the corresponding detection rod 9 reaches the maximum, at the moment, each sliding plate 7 cannot move in the direction of the positioning hole 4 any more, at the moment, the rotating rocking handle 16 stops rotating, and the rotating disc 5 cannot rotate due to the self-locking performance of the worm gear, and each feeler lever 9 and each sliding plate 7 are all in the fixed position to grasp the work piece at this moment, because each probe ball 10 that stretches out is the point contact with the peripheral surface of work piece to reduce the damage that the positioning is grasped and caused to the surface of work piece, can let the lathe 1 main spindle begin the normal work to rotate after that, the three-jaw chuck 2 drives the work piece to rotate, the slender axles work piece another end rotates in the positioning center of each probe ball 10, each probe ball 10 can rotate at the corresponding feeler lever 9 output end, do not hinder the rotation of the work piece while grasping the positioning to the work piece, control the cutter afterwards can carry on the lathe work piece to the lathe work piece, only need the backward rotation rocking handle 16 after the work piece finishes processing can make each feeler lever 9 keep away from the surface of work piece and relieve the grasp to the work piece, so as to finish the lathe work piece of slender axles work piece.

Claims

1. A positioning tool for a lathe comprises the lathe (1), wherein a three-jaw chuck (2) is arranged at the output end of a main shaft of the lathe (1), and the positioning tool is characterized by further comprising a positioning disc (3) which is connected with the lathe (1) in a transverse sliding manner, the axis of the positioning disc (3) is superposed with the axis of the main shaft of the lathe (1) and the axis of the three-jaw chuck (2), a positioning hole (4) is coaxially formed in the positioning disc (3), a rotating disc (5) which coaxially rotates in the positioning disc (3) is driven in the positioning disc (3) in a worm and gear matching manner, a plurality of arc-shaped grooves (6) uniformly start to be formed in the rotating disc (5) along the circumference, sliding plates (7) are matched with the arc-shaped grooves (6) through notches, a plurality of linear grooves (8) are uniformly formed in the positioning disc (3) along the circumference, and the sliding plates (7) are all slidably connected in the corresponding linear grooves (8), the inside all through spring coupling have in sliding plate (7) inside gliding probe rod (9) of sliding plate (7) in each sliding plate (7), and the equal ball of each probe rod (9) output is articulated has probe ball (10).

2. The positioning tool for the lathe as claimed in claim 1, wherein each linear groove (8) is communicated with the positioning hole (4), and each linear groove (8) is perpendicular to the axial direction of the positioning disc (3) towards the positioning hole (4).

3. The positioning tool for the lathe as claimed in claim 2, wherein the axis of each probe (9) is perpendicular to the axis direction of the positioning disc (3).

4. The positioning tool for the lathe according to claim 1, wherein a graduated scale (11) is fixedly connected to the output end of each sliding plate (7), and a pointer (12) matched with the corresponding graduated scale (11) is fixedly connected to one side of each probe rod (9).

5. The positioning tool for the lathe according to claim 1, wherein a through hole (13) matched with the positioning hole (4) is coaxially formed in the rotating disc (5), a plurality of worm gear teeth (14) are fixedly connected to the circumferential side wall of the rotating disc (5), a driving worm (15) rotating in the positioning disc (3) is matched with the worm gear teeth (14), and a rocking handle (16) extending out of the positioning disc (3) is fixedly connected to the driving worm (15).

6. The positioning tooling for turning machines according to claim 1, characterized in that each probe ball (10) extends inside the corresponding slide plate (7) in the initial state.