KR101629633B1 - The Tailstock of the NC Lathe - Google Patents

Abstract

The present invention relates to a tailstock of an NC lathe.
The cardiovascular table of the NC lathe according to the present invention includes a body 210 installed to protrude toward the inner diameter side of the guide unit 140, a guide groove 222 installed at the inner diameter of the body 210, A center hole 224 and a taper hole 226 are formed in the inside of the sleeve 220 and the sleeve 220 to move the sleeve 210. The cylinder liner 232 is formed on one side of the sleeve 220 and the sleeve 220, The piston head 234a of the piston 234 is inserted into the body 210 and a part of the piston 234 is fixed to the body 210 and the sleeve cover 240 is installed at the end of the cylinder liner 232, The first and second chambers 232a and 232b are formed on both sides of the sleeve 220 and the first and second chambers 232a and 232b through the piston 234, (Not shown).

Description

{The Tailstock of the NC Lathe}

The present invention relates to a tailstock of an NC lathe, and more particularly to a tailstock of an NC lathe used to support a workpiece mounted on a chuck in an NC lathe.

Normally, an NC lathe is known as an automated lathe capable of numerical control, and on one side of the bed guide surface, a pressure bar is disposed on the opposite side of the main shaft.

The above-mentioned pressure tap acts to support one end of the workpiece with the chuck of the spindle and the workpiece can be moved in the axial direction. By pushing the live center to the end of the workpiece, the workpiece is firmly fixed .

In addition, a drill chuck having a tapered shank, a tapered drill, or the like may be attached in addition to the above-described live center.

The abovementioned pressure bar has evolved to automatically replace tools such as live centers, drill chucks, and taper drills as the NC lathe is automated.

The conventional pressure-reducing valve will be described with reference to FIGS. 1 and 2. FIG.

1 and 2, the card stock 100 includes a body 110, a sleeve 120 disposed to penetrate the body 110, and a cylinder 110 disposed on one side of the body 110 to move the sleeve 120 described above. Unit 130 is installed.

A guide unit 140 is installed on one side of the body 110 and a part of the guide unit 140 protrudes toward the sleeve 120 described above.

A guide groove 122 is formed in the outer diameter of the sleeve 120 and a part of the guide unit 140 described above is inserted into the guide groove 122. As a result, And is linearly moved in one body 110 without being rotated.

The sleeve 120 has a center hole 124 formed therein and a tapered taper hole 126 is formed at one side of the center hole 124.

Various types of tools such as the live center 150 may be mounted on the taper hole 126, and a drill chuck having a taper shank, a taper drill, or the like may be mounted.

When the sleeve 120 enters the inside of the body 110 as described above, the end of the sleeve 120 is closed to fix the live center 150 described above. The end of the sleeve 120 is loosened so that the live center 150 can be pulled out.

The above-described sleeve 120 is driven by the cylinder unit 130 and is described in more detail as follows.

The cylinder unit 130 is installed to protrude from the outside of the body 110 and the piston 132 having the first and second rams 134 and 136 formed on both sides of the cylinder unit 130 .

Further, either one of the above-described pistons 132 is fixed to the above-described sleeve 120 via the fixing member 128.

The conventional cardiac pacemaker 100 configured as described above functions as follows.

1, when the live center 150 is mounted on the tailstock 100, the hydraulic pressure is applied in the direction in which the piston 132 is retracted to retract the piston 132, The sleeve 120 is moved toward the inside of the body 110, thereby fixing the live center 150 to the sleeve 120.

Thereafter, the tailstock 100 is moved in the direction of pressing the center of the workpiece on the bed of the NC lathe, thereby supporting the workpiece.

Also, even if the workpiece rotates, the sleeve 120 is prevented from rotating by the guide unit 140, so that the workpiece can be stably supported without being rotated.

2, when the live center 150 is separated from the tail stock 100, the hydraulic pressure is applied in the direction in which the piston 132 advances to advance the piston 132, The sleeve 120 is moved toward the outside of the body 110 so that the live center 150 is loosened at the end of the sleeve 120 and the live center 150 can be replaced.

However, the above-described conventional card stock 100 has the following problems.

1, the main body of the cylinder unit 130 protrudes (see A), and the piston 132 further protrudes (see B) when the piston 132 is retracted.

As described above, the cylinder unit 130 is disposed so as to protrude from the body 110 of the tailstock 100, thereby enlarging the occupied space occupied by the tailstock 100, resulting in an inefficient use of space in the NC shelf .

Further, as described above, a part of the cylinder unit 130 protrudes outward, so that there is a problem that a chip is caught in a protruding portion during cutting.

Since the hydraulic pressure is transmitted to the sleeve 120 from the cylinder unit 130 for driving the sleeve 120 at a long distance in the conventional card stock 100, the force applied to the work by the live center 150 is low have.

In addition, the conventional card stock 100 has a problem in that the force pushing the workpiece is weakened when it is used for a long period of time, so that the fixed support force is weakened and the workpiece can not be supported firmly.

The conventional seat belt reloader 100 can deform the piston 132 when an excessive force is applied to the piston 132 when it is used for a long period of time, It may be damaged and leaked.

On the other hand, when the live center 150 is removed from the tailstock 100, the live center 150 is mounted on the tapered hole 126 with a great pressure, and the center hole 124 has a shape There is a problem that the live center 150 is not easily removed when the live center 150 is pulled out.

When the live center 150 is not easily pulled out as described above, the live center 150 or the tail pad 100 is lightly hit with a hammer or the like or the live center 150 is shaken, There is a problem in that it is inconvenient that the live center 150 should be pulled out.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a cylinder unit for moving a sleeve, And to provide a tailstock of an NC lathe.

Another object of the present invention is to minimize the pressure loss by allowing the action of the hydraulic pressure to actuate the sleeve to be physically close to the sleeve so as to maintain the sleeve at a higher pressure for an extended period of time, And to provide a tailstock of an NC lathe.

Another object of the present invention is to provide a tailstock of an NC lathe which can be more easily removed when a live center, a drill chuck, and a taper drill are removed from a tailstock.

The present invention has been made in view of the above problems, and it is an object of the present invention to at least partially solve the problems in the conventional arts. There will be.

According to an aspect of the present invention, there is provided a CN bearing lathe comprising: a body having a guide unit protruding toward an inner diameter side; A sleeve installed in the inner diameter of the body and having a guide groove formed therein for inserting a part of the guide unit and having a center hole and a tapered hole formed therein, And a cylinder liner is formed at one side of the sleeve, a part of the piston is inserted into the cylinder liner, a part of the piston is fixed to the body, and a sleeve cover is provided at an end of the cylinder liner, 1, a second chamber is formed, and the cylinder unit moves the sleeve by the hydraulic pressure of the operating oil supplied to the first and second chambers through the piston.

The cylinder unit may include a fixed cover having one end fixed to an end of the piston and the other end fixed to the body and having first and second hydraulic pressure conduits provided in the first and second chambers, .

The cylinder unit may further include: a first hydraulic pressure pipe formed in the piston to supply hydraulic fluid to the first chamber to retract the sleeve; And a second hydraulic pressure pipe formed in the piston to supply the hydraulic oil to the second chamber to advance the sleeve.

Further, the sleeve may further include a vent hole for communicating the guide groove and the center hole.

The details of other embodiments are included in the detailed description and drawings.

The cylinder head unit of the NC lathe according to the present invention as described above can be constructed such that the cylinder unit for moving the sleeve is disposed inside the depressurizing unit so that the cylinder unit does not protrude outside the depressurizing unit, , It is possible to eliminate the phenomenon that cutting chips are piled up or caught in a part of the cylinder unit.

In addition, since the pressure bearing of the NC lathe according to the present invention acts at a position physically close to the sleeve, the action of the hydraulic pressure for actuating the sleeve minimizes the pressure loss so that the sleeve can be maintained at a larger pressure for a long time, And can be stably supported.

In addition, since the center hole of the NC lathe according to the present invention is connected to the atmosphere through the atmosphere, no sound pressure is generated inside the center hole when the tail stock is pulled out, and live centers, drill chucks and taper drills can be more easily Can be removed.

FIG. 1 is a view for explaining an example in which a live center is installed in a tailstock of a conventional NC lathe.
2 is a view for explaining an example in which a live center is relaxed in a tailstock of a conventional NC lathe.
FIG. 3 is a view for explaining an example in which a live center is installed in a tailstock of an NC lathe according to an embodiment of the present invention.
4 is a view for explaining an example in which a live center is relaxed in a tailstock of an NC lathe according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

Like reference numerals refer to like elements throughout the specification, and like elements to those of the prior art are denoted by the same reference numerals, and a detailed description thereof will be omitted.

3 and 4, a description will be given of a tailstock 200 of an NC lathe according to an embodiment of the present invention.

FIG. 3 is a view for explaining an example in which a live center is installed in a tailstock 200 of an NC lathe according to an embodiment of the present invention, and FIG. 4 is an exploded perspective view of an NC lathe 200 according to an embodiment of the present invention. The center of gravity of the live center 200 is relaxed.

3 and 4, the tailstock 200 according to an embodiment of the present invention includes a sleeve 220 and a cylinder unit 230 inside the body 210. As shown in FIG.

The body 210 has a guide unit 140 on one side and a portion of the guide unit 140 on the sleeve 220 side.

A guide groove 222 is formed in the outer diameter of the sleeve 220 and a portion of the guide unit 140 is inserted into the guide groove 222. Thus, (Not shown).

A center hole 224 is formed in the sleeve 220 and a tapered taper hole 226 is formed at one side of the center hole 224. The center hole 224 One side may further include a vent hole 228 communicating with the outer diameter of the sleeve 220.

The center hole 224 described above can also serve to reduce the weight of the sleeve 220 described above.

The vent hole 228 is communicated with the guide groove 222 so that the guide groove 222 is always communicated with the atmosphere so that the air passes through the vent hole 228, The atmospheric pressure can be maintained up to the hole 224.

Various types of tools such as the live center 150 may be mounted on the taper hole 226. For example, a drill chuck or a taper drill having a taper shank may be mounted.

When the sleeve 220 enters the inside of the body 210 as described above, the end of the sleeve 220 is closed to fix the live center 150 described above. The end of the sleeve 220 is loosened and the above-described live center 150 can be pulled out.

The above-described sleeve 220 is driven by the cylinder unit 230 and is described in more detail as follows.

A cylinder liner 232 is formed on one side of the sleeve 220. A piston 234 is disposed on the cylinder rider 232 and a sleeve cover 240 is disposed on the outer diameter of the piston 234, As shown in Fig.

The cylinder liner 232 described above is formed with the first chamber 232a and the second chamber 232b with respect to the piston head 234a of the piston 234.

The piston 234 described above is formed with a first oil pressure conduit 236 so as not to pass through the piston head 234a described above and a second oil pressure conduit 238 passing through the piston head 234a described above is formed.

The first hydraulic pipe 236 is a pipe for supplying the hydraulic oil to the first chamber 232a and the second hydraulic pipe 238 is connected to the second chamber 232b to supply the hydraulic oil to the second chamber 232b Respectively.

The above-described piston 234 is fixed to the above-mentioned body 210. Hydraulic pressure lines are connected to the first hydraulic pressure conduit 236 and the second hydraulic conduit 238, have.

On the other hand, a fixed cover 260 may be disposed on one side of the piston 234, and the fixed cover 260 may be fixed to the body 210 described above.

The fixed cover 260 described above is formed with first and second hydraulic conduits 262 and 264 so as to correspond to the first hydraulic conduit 236 and the second hydraulic conduit 238, The first and second hydraulic pressure pipes 262 and 264 are connected to hydraulic lines, respectively, so that the hydraulic oil can be introduced and received.

That is, the fixed cover 260 described above can be structurally stable and fixed to the piston 234 when the piston 234 described above is fixed to the body 210.

The tailstock 200 according to an embodiment of the present invention configured as described above functions as follows.

3, when the live center 150 is mounted on the tail stock 200, the hydraulic oil is supplied through the first oil hydraulic line 236 to retract the piston 234, and the piston 234 described above The sleeve 220 is moved toward the inside of the body 210 as a result of which the live center 150 is fixed to the sleeve 220. [

The tailstock 200 is then moved in a direction to press the center of the workpiece on the bed of the NC lathe to support the workpiece.

In addition, even if the workpiece rotates, the sleeve 220 is prevented from rotating by the guide unit 140, so that the workpiece can be stably supported without being rotated.

4, when the live center 150 is separated from the tailstock 200 according to the embodiment of the present invention, the hydraulic fluid is supplied to the second hydraulic pressure pipeline 238 to advance the piston 234, The sleeve 220 is moved outwardly of the body 210 so that the live center 150 is loosened at the end of the sleeve 220 to replace the live center 150 .

When the live center 150 is pulled out from the sleeve 220, the center hole 224 formed in the sleeve 220 is always communicated with the atmosphere through the vent hole 228, It is possible to more easily pull out the gripper 150.

As described above, in the tailstock 200 according to the embodiment of the present invention, the cylinder unit 230 for driving the sleeve 220 is not protruded to the outside of the tailstock 200, Can be reduced and the space occupied by the tail stock 200 in the NC lathe can be reduced.

In addition, the tailstock 200 according to an embodiment of the present invention minimizes the components protruding to the outside of the tailstock 200, thereby eliminating the problems such as cutting chips being accumulated or accumulated due to the cutting process .

In addition, since the cylinder unit 230 is disposed inside the sleeve 220, the number of components of the component is significantly reduced as compared with the conventional cylinder unit 130, It can be more convenient.

The area of the cylinder unit 230 filled with the operating fluid and applied with the pressure is remarkably widened as compared with that of the cylinder unit 130 of the conventional card stock 100. Therefore, the card stock 200 according to the embodiment of the present invention, The sleeve 220 can be moved and supported with a larger pressure than the conventional card stock 100, and a large pressure can be maintained for a long time.

In addition, when a tool such as the live center 150 is pulled out from the tail stock 200, a vacuum pressure is not generated in the sleeve 220, so that it can be pulled out more easily.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be.

It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

The cardioplegia according to the present invention can be used to support a workpiece by being installed on a bed guide surface of an NC lathe.

100: tailstock 110: body
120: Sleeve 122: Guide groove
124: center hole 126: taper hole
128: Fixing member 130: Cylinder unit
132: piston 134, 136: first and second rams
140: guide unit 150: live center
200: tailstock 210: body
220: Sleeve 222: Guide groove
224: center hole 226: taper hole
228: ventilation hole 230: cylinder unit
232: cylinder liners 232a, 232b: first and second chambers
234: Piston 234a: Piston head
236: first hydraulic pipe 238: second hydraulic pipe
240: Sleeve cover
260: fixed cover 262, 264: first and second hydraulic pipes

Claims (4)

A body 210 installed so that the guide unit 140 protrudes toward the inner diameter side;
A guide groove 222 is formed in the inner circumferential surface of the body 210 so as to be moved in the body 210 and a part of the guide unit 140 is inserted therein, and a center hole 224 and a taper A sleeve 220 in which a hole 226 is formed and a cylinder liner 232 is formed inside the rear;
A piston 234 having a piston head 234a inserted into the cylinder liner 232 and a rear end fixed to the body 210; And
And a sleeve cover (240) installed at a rear end of the sleeve (220) and through which the piston (234) passes,
The first and second chambers 232a and 232b are formed on both sides of the piston head 234a and the operating fluid is supplied to the first chamber 232a or the second chamber 232b through the piston 234 And the sleeve 220 is moved forward or backward by the hydraulic pressure of the operating oil
A reloader of an NC lathe.
The method according to claim 1,
The first and second hydraulic conduits 262 and 263 are fixed to the end of the piston 234 and the other end are fixed to the body 210 and provide hydraulic fluid to the first and second chambers 232a and 232b, 264) is formed on the outer surface of the stationary cover (260).
3. The method according to claim 1 or 2,
The piston (234)
A first hydraulic line 236 is formed so that the first hydraulic fluid is provided in the first chamber 232a and a second hydraulic line 238 is formed in the second chamber 232b so that the second hydraulic fluid is supplied to the second chamber 232b,
When the first hydraulic fluid is supplied to the first hydraulic pressure conduit 236, the sleeve 210 is retracted. When the second hydraulic fluid is supplied to the second hydraulic conduit 238, the sleeve 210 is advanced Features a tailstock of NC lathe.
The method according to claim 1,
Wherein the sleeve (220) further comprises a vent hole (228) for communicating the guide groove (222) with the center hole (224).

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