KR20180002294A - Sub chuck jaw for lathe - Google Patents

Abstract

The present invention relates to a sub-chuck jaw for a lathe, wherein one side moves at a straight line along a plurality of rotating shafts provided on a head stock plate surface of a lathe to be coupled to a chuck jaw moving to a set-up position, and the other side comes in contact with the outer circumferential surface of a roll or a shaft of the lathe to connect the chuck jaw and the shaft. According to the present invention, the sub-chuck jaw for a lathe connects the shaft and the chuck jaw to significantly reduce a fatigue degree of a worker and working time.

Description

{Sub chuck jaw for lathe}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary chuck for a lathe, and more particularly, to an auxiliary chuck for a lathe capable of shortening the operator's fatigue and fastening time when fastening the chuck.

The lathe is the oldest machine tool and is a device that performs various cutting processes. The lathe is a device that allows the work of using the bite to be carried out by the human hand from the machine. It enables to machine various mechanical parts as well as the thread cutting work by using the conversion gear while driving the lathe by the mechanical power.

The main components are the bed spindle, the great-great-great-great-great-abdomen, the tool stand, and the transfer device. It is designed to fix the workpiece between the main shaft and the tailstock, and to receive rotational motion from the main shaft. However, there is also some work to maintain workpieces in the spindle without a tailstock, such as vertical lathes or turret lathes. A chuck is mounted on the end of the main shaft to hold the workpiece. An example of such a chuck is disclosed in U.S. Patent Publication No. 2002-0096019.

Such a chuck is provided with a plurality of jaws for setting up a product processing facility on the surface of the head stock. To place the tool in the set-up position, the tool was placed on the shaft provided in the tool, and the operator lowered the tool with the hammer and rotated the tool shaft one turn at a time. The shaft of the jaw rotates one turn and the jaw moves linearly along the rotation axis provided on the surface of the head stock little by little to move to the setup position.

However, such a conventional chucking machine requires a manual rotation of the rotary shaft of the chucking by hand to move it to the set-up position, so that preparation time for fastening the chucking jig is not only excessive but also fatigue of the worker is extremely high. In addition, there is a problem that breakage of the equipment often occurs due to the use of the hammer.

United States Patent Application Publication No. 2002-0096019 (published on July 25, 2002)

It is an object of the present invention to provide an auxiliary chuck for a lathe which can shorten the fatigue and fastening time of a worker when fastening the chuck.

The auxiliary chuck for a lathe according to the present invention is characterized in that one side is coupled to a chuck which moves linearly along a plurality of rotation shafts provided on a head stock plate surface of a lathe and moves to a set up position, Thereby connecting the chuck assembly and the shaft.

A connecting portion connected to one side of the chuck, and an extension portion integrally formed with the connecting portion, the end of which is in contact with the outer circumferential surface of the roll or shaft.

The connection portion is formed with a through hole corresponding to the shape of the insertion portion so that an insertion portion protruding in a tetrahedron form is inserted from one side of the chuck.

And the width of the extending portion is narrowed from the connecting portion side to the end portion facing the roll or shaft.

The extension portion includes an engagement portion formed integrally with the end portion and formed with a screw groove engaged with a thread formed on the outer circumferential surface of the roll or shaft.

And the engaging portion is formed in a shape corresponding to the curvature of the outer circumferential surface of the roll or shaft.

And the engaging portion is made of the same material as the extending portion.

And the engaging portion is made of a material different from that of the extending portion.

And a plurality of fastening members inserted through the connecting portion and pressing the insertion portion of the chuck to keep the connecting portion connected to the chuck.

The auxiliary chuck for a lathe according to an embodiment of the present invention has an effect of greatly reducing the fatigue and working time of the operator by connecting the shaft and the chuck.

1 is a front view showing a mounting state of a chuck for a lathe,
FIG. 2 is an exploded perspective view showing an auxiliary chuck for a lathe according to an embodiment of the present invention, FIG.
3 is a perspective view showing an operating state of the auxiliary chuck for a lathe according to FIG.

Hereinafter, a moving apparatus of a chuck for a lathe according to an embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 2 is an exploded perspective view showing an auxiliary chuck for a lathe according to an embodiment of the present invention, and Fig. 3 is an exploded perspective view of the auxiliary chuck for a lathe according to the embodiment of Fig. Fig.

As shown in FIG. 1, the chuck 300 is mounted on the surface of the headstock 100 of the shelf at 12:00, 3:00, 6:00, and 9:00, respectively.

For this, grooves 110 are formed along the radial direction at 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock directions on the head stock 100, and grooves 110 are formed along the longitudinal direction of the outer circumferential surface And a rotary shaft 130 having gear teeth formed therein.

The chuck 300 is a rectangular parallelepiped block and is mounted on the headstock 100 in such a manner that the rotational axis 130 of the headstock 100 passes through along the longitudinal direction. The chuck 300 has an insertion portion 302 protruding from one side of the chuck 300 to insert an auxiliary chuck 500, which will be described later. The chuck 300 includes an auxiliary gear (not shown) that linearly moves in engagement with the gear of the rotating shaft 130, and a center shaft 310 is coupled to the center of the auxiliary gear. The auxiliary gear rotates together with the center shaft (310) passing through the center rotating by the operator. Since the outer peripheral surface of the auxiliary gear is coupled to the rotary shaft 130 in a tooth-like manner, the auxiliary gear is moved along the longitudinal direction of the rotary shaft 130 while rotating. More detailed description is as follows.

One end of the central shaft 310 is exposed to the outside of the chuck 300 and the exposed direction is the outer circumferential direction of the head stock 100. When the center shaft 310 is rotated outside the chuck 300, the auxiliary gear is rotated and moved along the gear formed on the rotation shaft 130. Here, the rotary shaft 130 serves as a rack gear, and the auxiliary gear serves as a pinion gear, so that the chuck 300 can move along the longitudinal direction of the rotary shaft 130. This is the same principle as converting rotary motion into linear motion using rack gears and pinion gears.

As shown in FIGS. 2 and 3, an auxiliary chuck 500 for assisting the chuck 300 is provided. The auxiliary chuck 500 serves to set the roll or shaft 10 to the machining position by connecting between the chuck 300 and the roll or shaft 10 fastened to the lathe. Conventionally, since the chuck 300 is moved to fix the roll or shaft 10 to the machining position, the chuck 300 must be moved to the contact position of the shaft 10 (hereinafter, box).

Conventionally, in order to move the chuck 300 to the contact position of the shaft 10, a mechanism is coupled to the central axis 310 of the chuck 300 and an operator descends with the hammer to move the central axis 310 ) Was rotated little by little to move the chuck 300 adjacent to the shaft 10. If the time required for this operation is, for example, 1 hour and 30 minutes, by joining the auxiliary chuck 500 between the chuck 300 and the shaft 10, the working time is shortened to about 30 minutes. That is, the chuck 300 may be moved less toward the shaft 10 by the size of the auxiliary chuck 500, thereby shortening the working time.

The auxiliary chuck 500 includes a connection portion 510 connected to the chuck 300 and an extension portion 530 contacting the roll or shaft 10 fastened to the shelf, And a fastening member 550 for fastening the fastening member 510 to the chuck 300.

The connecting portion 510 has a rectangular frame shape and is provided with a through hole 510a through which a protruded portion of the chuck 300 is inserted into a plate surface having a predetermined thickness And is inserted into the bath 300. It is preferable that the size of the through groove 510a corresponds to the size of the insertion portion 300a of the chuck 300. [

The extension part 530 is integrally formed with the connection part 510 and has a shape narrower toward the end toward the shaft 10 from the connection part 510. That is, the extending portion 530 has a triangular plate shape having a predetermined thickness by gradually narrowing the width from the rectangular connecting portion 510. A plurality of threaded grooves 532a are formed at the narrow end of the extended portion 530 so as to be engaged with the outer peripheral surface of the threaded portion formed in the shaft 10. The end where the screw groove 532a is formed is defined as the engaging portion 532.

The engaging portion 532 has a plate surface height lower than the edge of the plate surface on which the screw groove 532a is formed. More specifically, when the engaging portion 532 is placed on the bottom surface and the screw groove 532 is viewed from the top, the structure is recessed in the 'V' shape or the streamline toward the connection portion 510 from the edge of the plate surface, It accomplishes. That is, the shape of the engaging portion 532 corresponds to the curvature of the outer peripheral surface of the shaft 10. When the engaging portion 532 is in the shape of a straight line, the engaging portion 532 is partially in contact with the outer circumferential surface of the cylindrical shaft 10. However, if the engaging portion 532 is formed into a V shape, So that it can be more stably interlocked. The engaging portion 532 may be made of the same material as the material constituting the auxiliary chuck 532, or may be made of another material and integrally fixed to the extending portion 530.

For example, the connecting portion 510 and the extending portion 530 may be made of duralumin, and the engaging portion 532 may be made of heat-treated steel to improve the strength.

The fastening member 550 may be composed of a plurality of bolts. The fastening member 550 is inserted through the outer side of one side of the connecting portion 510 inwardly and a thread groove corresponding to the thread of the bolt is formed on the inner circumferential surface of the through hole into which the fastening member 550 is inserted instead of the nut. The fastening force of the chuck 300 and the auxiliary chuck 500 can be improved. At this time, the head of the fastening member 550 is positioned on the outer side of the connection portion 510 and the end of the fastening member 550 is in contact with one surface of the chuck 300. The fastening member 550 can press one surface of the chuck 300 to fasten the chuck 300 and the auxiliary chuck 500 to each other by tightening the fastening member 550.

As described above, when the auxiliary chuck is coupled to the chuck, it is not necessary to pull the chuck to the shaft of the lathe by the length of the auxiliary chuck so that the working time is shortened.

One embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and modify the technical spirit of the present invention in various forms. Accordingly, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

100: head stock 130:
300: Chuck assembly 300a: Insertion part
500: auxiliary chuck 510: connection
530: extension part 532:
550: fastening member

Claims (9)

One side of which is linearly moved along a plurality of rotation shafts provided on a head stock plate surface of the lathe and is coupled to a chuck which moves to a setup position and the other side is brought into contact with the outer surface of the roll or shaft of the lathe, And a second chuck for the lathe. The method according to claim 1,
And an extension portion integrally formed with the connection portion and having an end portion contacting an outer peripheral surface of the roll or the shaft. 3. The method of claim 2,
Wherein the connecting portion is formed with a through hole corresponding to the shape of the insertion portion so that an insertion portion protruding in a tetrahedron form from one side of the chuck is inserted through the coupling portion. The method of claim 3,
Wherein the extending portion is formed in a shape that its width becomes narrower from the connecting portion side to the end portion facing the roll or shaft. 5. The method of claim 4,
And the extending portion includes an engaging portion formed integrally with the end portion and having a screw groove engageable with a thread formed on an outer peripheral surface of the roll or shaft. 6. The method of claim 5,
Wherein the engaging portion is formed in a shape corresponding to the curvature of the outer circumference of the roll or shaft. The method according to claim 6,
Wherein the engaging portion is made of the same material as the extending portion. The method according to claim 6,
Wherein the engaging portion is made of a different material from the extending portion. The method of claim 3,
Further comprising: a plurality of fastening members inserted through the connection portion, the plurality of fastening members pressing the insertion portion of the chuck to keep the connection portion connected to the chuck.

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