KR100905079B1 - Index chuck for cnc lathe - Google Patents

Abstract

An index chuck for a CNC lathe is provided to rotate workpiece with the mechanical power of an operating bar formed in a CNC(computerized numerical control) lathe without supplying a separate energy source from outside. An index chuck for a CNC lathe comprises a body(110), a lifting operation part(120), a lifting operation part mobile tool(130), a rotary body(150), a rotary coupling plate(160), a fixed coupling plate(170), a first elastic body(180), a clutch bearing(190), and a pinion(191). An body is mounted on the spindle of the CNC lathe and work space is formed in the front of the body. The lifting operation part is positioned in an upper direction of the work space and is mounted on the body and is vertically slid. The rotary body is positioned in the lower direction of the work space and is mounted on the body and is vertically slid and rotates to the body around a sliding movement line. The rotary coupling plate is mounted on the top of the rotary body and has a first fastening unit at the bottom of the rotary coupling plate. The fixed coupling plate is mounted on the body and is located on the bottom of the rotary coupling plate and has a second fastening unit on the top of the fixed coupling plate. The first elastic body is formed between the body and the bottom of the rotary body and elastically supports the rotary body upward. The clutch bearing is inserted into the inner side of the clutch bearing and the clutch bearing is coaxially coupled on the rotary body. The outer side of the clutch bearing is mounted on the inner side of the pinion.

Description

INDEX CHUCK FOR CNC LATHE}

The present invention relates to an index chuck mounted on a CNC lathe.

Typical index chucks used in CNC lathes are primarily for machining workpieces of the same type which are repeated at intervals of 45 °, 90 °, 180 ° and the like.

That is, an index chuck is used when processing a workpiece of type T or Y.

In general CNC lathes equipped with such an index chuck, the index chuck is connected to a separate drive source provided on the CNC lathe main body to drive the workpiece at a constant rotation angle, or a separate drive source is provided on the index chuck and the drive source It is common to rotate a workpiece by means of.

However, when the workpiece is to be driven by the drive source operated by the electric motor, the hydraulic or the pneumatic cylinder, the structure of the index chuck is very complicated and the overall price is very high.

This problem requires a dedicated index chuck to be connected to the CNC lathe main body when the blood of the index chuck is a separate driving source provided on the CNC lathe main body, so that the cost is high and its versatility is low.

In addition, such a structure is difficult to spread widely because the manufacturer using a CNC lathe that does not have an index function has to replace the CNC lathe itself with an expensive CNC lathe having an index function.

On the other hand, even when a separate drive source is provided on the index chuck itself to rotate the workpiece by the drive source, the drive source needs to obtain energy that can be driven such as electric / hydraulic / pneumatic from the outside. The structure is very complicated.

It should be noted that the index chuck itself is the part rotated by the spindle of the CNC lathe when machining the workpiece. In order to supply energy such as electric / hydraulic / pneumatic to the rotating part as described above, not only the structure is complicated, but also an additional facility is required, which is a factor preventing the spread of the index chuck.

On the other hand, as a conventional technology for the index chuck, Republic of Korea Patent No. 10-0226073 "Index chucking system" (registered July 23, 1999), Republic of Korea Patent No. 10-0498749 "CNC shelf index chuck Piston Clamp "(registered June 22, 2005) and the like have been proposed and the prior arts are considered to be incorporated herein.

The present invention has been made to solve the problems of the prior art as described above, it is possible to rotate the workpiece itself by the mechanical force of the operation bar provided on the CNC lathe without a separate energy source, a separate energy source It is an object of the present invention to provide an index chuck for OneCNC lathe that does not need to be supplied from the outside and thus forms a very simple structure.

In order to solve the above problems, the present invention is coupled to the spindle of the C & C lathe, the front chuck body formed with a working space; Located in the upper direction of the work space, the lifting device is coupled to the chuck body slidably in the vertical direction, the upper saddle coupled to secure the workpiece to the lower; An elevating actuator moving means provided in the chuck body for converting a reciprocating movement of a connecting rod provided in the C & C shelf into an upward and downward movement of the elevating actuator; Located in the downward direction of the working space, is coupled to the chuck body in a slidable up and down direction, the rotation body is provided to be rotatable relative to the chuck body with the sliding movement line as the rotation center; A rotation fastening plate which is fixedly coupled to an upper portion of the rotating body, provided with a first fastening means on a lower surface thereof, and a lower saddle for fixing a workpiece to the upper portion; A fixed fastening plate fixedly coupled to the chuck body, the lower fastening plate being positioned below the rotary fastening plate, and having a second fastening means provided on an upper surface thereof for fastening and releasing with the first fastening means; A first elastic body provided between the chuck body and the lower portion of the rotating body to elastically support the rotating body in an upward direction; A one-way clutch bearing having the rotating body inserted into an inner circumferential surface thereof and being coaxially coupled with the rotating body; A pinion on which an outer circumferential surface of the one-way clutch bearing is mounted on an inner circumferential surface; A rack gear bar forming the pinion and the rack-pinion coupling, the rack gear bar being slidable in the horizontal direction on the chuck body; A second elastic body provided between the chuck body and one side of the rack gear bar to elastically support the rack gear bar; And the second elastic body side of the rack gear bar by the elastic force of the second elastic body when the first fastening means is fastened to the second fastening means by moving the rotary fastening plate downward. Movement in the opposite direction is not converted to rotation of the rotating body by the one-way clutch bearing, and the rotation fastening plate is moved upward by the elastic force of the first elastic body so that the first fastening means and the second fastening means In the state of being released from each other, the movement of the rack gear bar toward the second elastic body side is characterized in that the rack-pinion coupling is made to be converted into rotation of the pinion, the one-way clutch bearing, the rotating body.

In the above, it is preferable that the first fastening means and the second means are cubic coupled to each other.

In the above, the sliding distance of the bar for the rack gear is preferably set such that the rotation angle of the rotating body is any one of 30 °, 45 °, 60 °, 90 °, and 180 °.

As described above, the present invention can rotate the workpiece itself by the mechanical force of the operation bar provided on the CNC lathe without supplying a separate energy source from the outside, a separate energy source needs to be supplied from the outside It is possible to provide an index chuck for CNC lathes, which is very simple in structure and can be easily mounted on any type of CNC lathe.

Hereinafter will be described the specific configuration and operation according to an embodiment of the present invention.

1 is a vertical cross-sectional conceptual view of an index chuck according to an embodiment of the present invention mounted on a CNC lathe, FIG. 2 is a vertical cross-sectional conceptual view showing a movement trace of main components of the index chuck of FIG. 1, and FIG. 3 is AA of FIG. 2. It is a longitudinal cross-sectional conceptual view of the main components viewed from the line, Figure 4 is a cross-sectional conceptual view of the main components viewed from the line BB of Figure 3, Figures 5 to 10 are views for explaining the operation of the present embodiment.

The index chuck 100 is mounted on a CNC lathe, and is also coupled to the spindle 10 of the CNC lathe body to be rotated together with the spindle 10, and also coupled to the connecting rod 20 of the CNC lathe body to clamp / Unclamping (unclamping) operation.

Since the spindle 10, the connecting rod 20, and the structure of the connecting rod 20 are very widely used, detailed description thereof will be omitted.

The index chuck 100 is a number of parts are assembled together, but all but a few special parts are referred to as the chuck body 110.

The chuck body 110 may be understood herein to refer to all parts of the index chuck 100 that are fixed relative to the spindle 10.

The chuck body 110 is coupled to the main body of the CNC lathe as shown in Figures 1 to 2, the workpiece (1) is seated on the right side and the work space 111 for performing the machining operation on the workpiece (1) ) Is formed.

Main parts of the work space 111 will be described with reference to the main parts moving in the present index chuck 100.

The lifting lowering operation tool 120 is provided in the upper direction of the work space 111 to be slidable in the vertical direction in the chuck body 110.

The lower saddle 210 is coupled to the upper saddle 210 for fixing the workpiece (1).

The upper saddle 210 and the lower saddle 220 which will be described later may be changed into various shapes according to the shape of the workpiece 1 to be mounted on the index chuck 100.

On the other hand, the chuck body 110 is provided with a lifting mechanism movement means for converting the left and right reciprocating movement of the connecting rod 20 to the vertical movement of the lifting mechanism 120.

As the lifting mechanism moving means, the present embodiment is provided with a reciprocating member 130 and a crank lever 140.

The reciprocating member 130 is coupled to the connecting rod 20 on the left side of the main body of the CNC lathe, and can reciprocate left and right with the connecting rod 20 according to the left and right reciprocating movement of the connecting rod 20.

Of course, the reciprocating member 130 is provided to be slidable in the horizontal direction with respect to the chuck body (110).

The crank lever 140 is rotatably provided around the rotation shaft 141 provided on the chuck body 110.

One end of the crank lever 140 is inserted into a groove formed in the reciprocating member 130, and the other end is inserted into a groove formed in the elevating operation hole 120.

Therefore, when the reciprocating member 130 is moved horizontally from side to side, this movement is transmitted to the rotation of the crank lever 140 and finally converted to the vertical movement of the elevating operation port 120.

It is understood that the elevating actuator moving means composed of such a reciprocating member 130 and the crank lever 140 is just one embodiment, and other ways of enabling the same operation can be easily applied.

Rotating body 150 is provided in the downward direction of the work space 111 to the chuck body 110 to be slidable in the vertical direction.

In addition, the rotating body 150 is a sliding movement line to the sliding movement to the center of rotation, the rotating body 150 is provided rotatably with respect to the chuck body (110).

Various bearings are provided for this purpose but will be readily understood without detailed description.

The rotary fastening plate 160 is fixedly coupled to the rotary body 150 at the upper portion of the rotary body 150.

Therefore, the rotation fastening plate 160 may be rotated together with the rotating body 150 or slidingly moved up and down together with the rotating body 150.

The lower saddle 220 for fixing the workpiece 1 is coupled to the upper portion of the rotation fastening plate 160.

The first fastening means 161 is provided on the lower surface of the rotation fastening plate 160.

On the other hand, as a part of the chuck body 110, a fixed fastening plate 170 is provided below the rotary fastening plate 160.

That is, the fixed fastening plate 170 is a part that is fixed and coupled to the chuck body 110 does not move.

On the upper surface of the fixed fastening plate 170, a second fastening means 171 for fastening or releasing with the first fastening means 161 is provided.

Since the first fastening means 161 and the second fastening means 171 may be fastened to each other or released from each other, and the first fastening means 161 is a portion that is rotated together with the rotary fastening plate 160, It is preferred to be cubic coupled to each other.

Therefore, when the rotation fastening plate 160 is moved to the bottom to be fastened with the fixed fastening plate 170, the rotation fastening plate 160 is in a state that can not be rotated, the rotation fastening plate 160 is moved upward to the fixed fastening When the fastening with the plate 170 is released, the rotary fastening plate 160 is in a state capable of being rotated.

Meanwhile, a first elastic body 180 such as a spring is provided between the lower portion of the rotating body 150 and the chuck body 110 to elastically support the rotating body 150 in the upward direction. Accordingly, if there is no special external force, the rotating body 150 moves upward by the first elastic body 180.

Hereinafter, the components for rotating the rotating body 150 will be described.

The middle portion of the rotary body 150 is provided with a one-way clutch bearing 190 is coupled coaxially with the rotary body 150.

That is, the rotary body 150 is coupled to the inner circumferential surface of the one-way clutch bearing 190 while being inserted.

In addition, the pinion 191 is mounted on the outside of the one-way clutch bearing 190.

That is, the outer circumferential surface of the one-way clutch bearing 190 is mounted on the inner circumferential surface of the pinion 191.

Therefore, since the pinion 191 forms a state in which the pinion 191 is mounted on the rotating body 150 via the one-way clutch bearing 190, the pinion 191 may be rotated with respect to the rotating body 150 only in one direction. In one direction, the rotating body 150 is rotated together, that is, the rotating body 150 is not rotated.

The rack gear bar 200 is provided to form the pinion 191 and the rack-pinion coupling.

The rack gear bar 200 is provided to be slidable in a horizontal direction with respect to the chuck body 110, and the rack gear bar 200 has a rack gear that forms a rack-pinion coupling with the pinion 191 as shown in FIG. 201) is formed.

Meanwhile, a second elastic body 202 such as a spring is provided between one end of the rack gear bar 200 and the chuck body 110 to elastically support the rack gear bar 200 in the right direction (see FIG. 2). . Therefore, if there is no special external force, the rack gear bar 200 is moved in the right direction by the second elastic body 202.

The guide member 112 provided on the chuck body 110 and the snap ring 203 mounted on the rack gear bar 200 are provided to limit the sliding distance of the rack gear bar 200.

That is, the rack gear bar 200 may move to the right until the snap ring 203 contacts the chuck body 110 on the right side, and the left end of the rack gear bar 200 contacts the guide member 112. To the left.

The operation of this embodiment provided as described above will be described with reference to FIGS. 5 to 10.

FIG. 5 illustrates a state in which the workpiece 1 is just settled in the work space 111 of the chuck body 110, specifically, the lower saddle 220.

6 shows that the reciprocating member 130 moves to the left side by the operation of the connecting rod 20 after FIG. 5. As a result, the crank lever 140 rotates in a clockwise direction while being fixed to the elevating operation tool 120. The upper saddle 210 moves downward to clamp the workpiece 1, wherein the lower saddle 220, the rotation fastening plate 160, and the rotation body 150 positioned under the workpiece 1 are the upper saddle. By the pressure of 210, the first fastening means 161 of the rotary fastening plate 160 is moved downward until the cubic coupling coupled to the second fastening means 171 of the fixed fastening plate 170. Of course, the first elastic body 180 is also compressed.

After this is achieved, the workpiece 1 is processed by a cutting tool or the like.

When the processing of the workpiece 1 is completed with respect to any part, as shown in FIG. 7, the reciprocating member 130 moves to the right side by the operation of the connecting rod 20, and accordingly, the crank lever 140 moves counterclockwise. While rotating, the elevating implement 120 and the upper saddle 210 fixed thereto are moved upwards to unclamp the workpiece 1, where the lower saddle (1) is located below the workpiece 1. 220, the rotation fastening plate 160, the rotation body 150 is moved upward by the elastic force of the first elastic body 180. Accordingly, the first fastening means 161 of the rotation fastening plate 160 is released from the fastening with the second fastening means 171 of the fixed fastening plate 170, and the rotating body 150 is rotatable.

When the operating bar (not shown) provided in the CNC lathe in the same state as in Figure 7 operates to press the rack gear bar 200 with a mechanical force is in a state as shown in FIG.

That is, in Figure 8, the rack gear bar 200 is moved to the left until the left end is in contact with the guide member 112 by pressing the operation bar.

The pinion 191 is rotated by the rack-pinion combination of the rack gear 201 and the pinion 191 formed in the rack gear bar 200 by the left movement of the rack gear bar 200 as described above. Together with the pinion 191, the one-way clutch bearing 190, the rotary body 150, the rotary fastening plate 160, the lower saddle 220 is rotated, and thus the workpiece 1 also rotates.

At this time, the sliding distance of the rack gear bar 200, it is preferable that the rotation angle of the rotary body 150 is usually set to any one of 30 °, 45 °, 60 °, 90 °, 180 °.

In the present embodiment, the rotation body 150 is set to rotate 45 ° by the sliding movement of the rack gear bar 200, the workpiece 1 will be described on the basis of the case to be processed in the same form at 45 ° intervals And, if the workpiece (1) is to be processed in the same form at intervals of 90 °, the sliding movement in the left direction of the rack gear bar 200 should occur twice.

The upper saddle 210 moves downward to clamp the workpiece 1 as shown in FIG. 9 while the rotating body 150 is rotated 45 °. At this time, the operation is made in the same manner as the movement of the upper saddle 210 in Figure 6, and also the rotating body 150 and the portion connected thereto also moves to the bottom. However, the rack gear bar 200 in Figure 9 maintains the state pressed to the left by the operation bar of the CNC lathe as shown in FIG.

After the workpiece 1 is clamped as shown in FIG. 9, when the operation bar for pressing the rack gear bar 200 as shown in FIG. 10 is removed, the rack gear bar 200 is snapped by the elastic force of the second elastic body 202. The right side of the 203 is moved to the right until it comes into contact with the chuck body 110. However, despite the right sliding of the rack gear bar 200 as described above, the rotating body 150 cannot rotate due to the cubic coupling of the first fastening means 161 and the second fastening means 171. Accordingly, the pinion 191 rotates but the rotation body 150 does not rotate, and the operation between the two is performed by the medium of the one-way clutch bearing 190.

In the state as shown in FIG. 10, the workpiece 1 may be processed again.

Of course, when the processing is completed in Figure 10, the process of Figures 7 to 10 is repeated again, the workpiece 1 can be processed after rotating by a predetermined rotation angle.

The above embodiments are only preferred embodiments of the present invention, and the technical idea of the present invention may be variously modified or adjusted by those skilled in the art. Such modifications and adjustments fall within the scope of the present invention if they use the technical idea of the present invention.

The present invention can be used as an index chuck for mounting on a CNC lathe.

1 is a longitudinal cross-sectional conceptual view showing an embodiment of an index chuck mounted on a CNC lathe according to the present invention;

2 is a longitudinal cross-sectional conceptual view showing traces of movement of main parts of the index chuck of FIG. 1;

3 is a longitudinal cross-sectional conceptual view of main components viewed from the line A-A of FIG. 2;

4 is a cross-sectional conceptual view of a main part as viewed based on line B-B of FIG. 3;

5 to 10 are views for explaining the operating process of the present embodiment.

<Description of Symbols for Main Parts of Drawings>

1: Workpiece 10: Spindle

20: connecting rod

100: index chuck 110: chuck body

120: lifting device 130: reciprocating moving body

140: crank lever 150: rotating body

160: rotation fastening plate 161: first fastening means

170: fastening plate 171: second fastening means

180: first elastic body 190: one-way clutch bearing

191: pinion

200: bar for rack gear 201: rack gear

202: second elastic body

210: upper saddle 220: lower saddle

Claims (3)

A chuck body coupled to the spindle of the C & C lathe and formed with a working space in front; Located in the upper direction of the work space, the lifting device is coupled to the chuck body slidably in the vertical direction, the upper saddle coupled to secure the workpiece to the lower; An elevating actuator moving means provided in the chuck body for converting a reciprocating movement of a connecting rod provided in the C & C shelf into an upward and downward movement of the elevating actuator; Located in the downward direction of the working space, is coupled to the chuck body in a slidable up and down direction, the rotation body is provided to be rotatable relative to the chuck body with the sliding movement line as the rotation center; A rotation fastening plate which is fixedly coupled to an upper portion of the rotating body, provided with a first fastening means on a lower surface thereof, and a lower saddle for fixing a workpiece to an upper portion thereof; A fixed fastening plate fixedly coupled to the chuck body, the lower fastening plate being positioned below the rotary fastening plate, and having a second fastening means provided on an upper surface thereof for fastening and releasing with the first fastening means; A first elastic body provided between the chuck body and the lower portion of the rotating body to elastically support the rotating body in an upward direction; A one-way clutch bearing having the rotating body inserted into an inner circumferential surface thereof and being coaxially coupled with the rotating body; A pinion on which an outer circumferential surface of the one-way clutch bearing is mounted on an inner circumferential surface; A rack gear bar forming the pinion and the rack-pinion coupling, the rack gear bar being slidable in the horizontal direction on the chuck body; A second elastic body provided between the chuck body and one side of the rack gear bar to elastically support the rack gear bar; It is made, including When the rotation fastening plate is moved downward and the first fastening means is fastened to the second fastening means, movement of the rack gear bar in the opposite direction to the second elastic body side by the elastic force of the second elastic body is It is not converted to the rotation of the rotary body by the one-way clutch bearing, When the rotation fastening plate is moved upward by the elastic force of the first elastic body so that the first fastening means and the second fastening means are released from each other, the movement of the rack gear bar toward the second elastic body is performed. C & C one-piece index chuck, characterized in that the rack-pinion coupling to be converted into the rotation of the pinion, the one-way clutch bearing, the rotary body. The method of claim 1, And said first fastening means and said second means are cubic coupled to each other. The method according to claim 1 or 2, The sliding distance of the bar for the rack gear, C and C vane index chuck, characterized in that the rotation angle of the rotating body is set to any one of 30 °, 45 °, 60 °, 90 °, and 180 °.

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