KR100428055B1 - Chuck change apparatus of CNC manufacturing machine - Google Patents

Abstract

The present invention relates to a chuck changer of a CNC machine tool for easily and easily performing chuck change. According to one embodiment of the present invention, the chuck 16 is attached to or detached from the spindle 12 of the CNC machine tool. An exchange apparatus for an actuator comprising: an actuator (50) mounted at a rear end of the spindle (12); A draw bar (60) disposed on the central axis of the spindle (12) and connected to the actuator (50) to move forward and backward; A chuck clamp (70) mounted at the tip of the spindle (12); A plurality of wedges 72 disposed at a predetermined interval in the circumferential direction on the front surface of the chuck clamp 70 and slidably coupled in a radial direction; The plurality of wedges 72 are hinged to the chuck clamp 70 in the same number and correspond to the plurality of wedges 72 and receive the forward and backward movements of the draw bar 60 to transfer the plurality of wedges 72 to the spindle 12. Linking means for vertically interlocking radially along an axis; The rear side of the chuck 16 mounted to the chuck clamp 70 is characterized in that the plurality of jaw 72 is provided with a coupling means that can be coupled or removed in accordance with the operating direction.

Description

Chuck change apparatus of CNC manufacturing machine

The present invention relates to a chuck changer of a CNC lathe, and more particularly, to a chuck changer of a CNC machine tool for easily and easily performing chuck change.

In general, in a CNC lathe, a spindle is provided with a chuck for mounting a workpiece. The chuck is exchanged by an operator according to the size, characteristics, shape, and use of the workpiece. For this chuck change the operator should be easy and convenient.

A chucking device of a conventional CNC lathe is shown in FIG.

A hydraulic cylinder 14 is mounted at the rear end of the spindle 12 as shown in FIG. 4, and the chuck 16 is fixed to the front end of the spindle 12 with an adapter 19 interposed therebetween. have. The chuck 16 and the hydraulic cylinder 14 are connected by a draw bar 20 inserted into the central axis of the spindle 12.

Therefore, when the draw bar 20 moves back and forth according to the direction of the hydraulic pressure applied to the hydraulic cylinder 14, the jaw 22 installed in the chuck 16 moves radially to clamp the workpiece. .

However, if the worker needs to replace the chuck 16 as necessary, it is possible to disassemble the plurality of bolts 18 assembled to the chuck 16. Since the bolts 18 are normally installed at six locations, the operator must loosen all six bolts, assemble new replacement chucks, and then tighten the six bolts again.

As such, the conventional chucking device has a slow operation time due to the large number of labors that require disassembly and assembly of a plurality of bolts when replacing the chuck, and the work of replacing the chuck is inconvenient. Therefore, there is a problem that the ability to work on the chuck exchange.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a chuck exchange device of a CNC machine tool which can improve work performance by making chuck exchange easy and easy.

According to the present invention to achieve the above object,

As an exchange device for attaching and detaching the chuck 16 to the spindle 12 of a CNC machine tool,

An actuator (50) mounted to the rear end of the spindle (12);

A draw bar (60) disposed on the central axis of the spindle (12) and connected to the actuator (50) to move forward and backward;

A chuck clamp (70) mounted at the tip of the spindle (12);

A plurality of wedges 72 disposed at regular intervals in a circumferential direction on the front surface of the chuck clamp 70 and slidably coupled in a radial direction;

The plurality of wedges 72 are hinged to the chuck clamp 70 in the same number and correspond to the plurality of wedges 72 and receive the forward and backward movements of the draw bar 60 to transfer the plurality of wedges 72 to the spindle 12. Linking means for vertically interlocking radially along an axis;

The rear side of the chuck 16 mounted to the chuck clamp 70 is characterized in that the plurality of jaw 72 is provided with a coupling means that can be coupled or removed in accordance with the operating direction.

The link means according to the invention,

A spherical body attached to the tip of the draw bar 60 and having a plurality of pivot grooves 42 in the spherical surface;

One end is pivotally coupled to each of the plurality of pivot grooves 42a of the connector 40, and the other end is pivotally coupled to the plurality of pivot grooves 72a formed at the respective back sides of the plurality of wedges 72, respectively. It consists of a link 80.

And the coupling means according to the present invention,

The back side of the chuck 16 is composed of a plurality of engaging grooves 16a into which the outer end of each wedge 72 can be inserted in a predetermined amount corresponding to the vertical direction in which the plurality of wedges 72 operate.

1 is an assembled cross-sectional view of the chuck exchange device according to an embodiment of the present invention, an unclamp state of the chuck.

Figure 2a, 2b is an enlarged cross-sectional view of the chucking portion in Figure 1, chuck clamp / unclamp operation state.

3 is a side cross-sectional view of FIG.

Figure 4 is an assembled cross-sectional view of the conventional chuck changer.

<Explanation of symbols for the main parts of the drawings>

12: spindle 16: chuck

16a: coupling groove 40: connector

42a: pivot groove 50: actuator

60: draw bar 70: chuck clamp

72: wedge 72a: pivot groove

80: link

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

Figure 1 is an assembled cross-sectional view of the chuck exchange device according to an embodiment of the present invention, an unclamp state of the chuck, Figures 2a, 2b is an enlarged cross-sectional view of the chucking portion in Figure 1, chuck clamp / unclamp operation state diagram, Figure 3 Is a side cross-sectional view of FIG.

As shown in Figs. 1 to 3, the chuck exchange device of the present invention is to be easily and easily detached by controlling the chuck 16 to the spindle 12 of the CNC machine by only operating the actuator 50.

The actuator 50 used hydraulically actuated actuators in this embodiment but the present invention includes all actuator means that are pneumatically or electrically operated.

The actuator 50 is mounted to the rear end of the spindle 12 to operate the draw bar 60 forward and backward in the direction of the central axis of the spindle 12. The draw bar 60 is arranged on the central axis of the spindle 12, one end of the draw bar 60 is screwed to the operating rod 52 of the actuator 50, the other end thereof The connector 40 is screwed in.

A chuck clamp 70 is mounted at the tip of the spindle 12 with a plurality of fastening bolts B1 as shown in FIG. 3, and a connector connected to the tip of the draw bar 60 at the center of the chuck clamp 70. 40 is located.

The front surface of the chuck clamp 70 is provided with a plurality of wedges 72 are arranged at regular intervals in the circumferential direction and slidably assembled in the radial direction, each of the plurality of wedges 72 is a chuck clamp 70 Are slidably coupled to the T-shaped guide grooves 70a of the T-shaped guide grooves, and tapered surfaces 72b are formed at the outer ends of the wedges 72 to increase the coupling force with the chuck 16. A plurality of pivot grooves 72a are formed on the inner surface of the 72 for pivot connection with the link 80 to be described later.

The chuck clamp 70 is assembled with a plurality of links 80 hinged by hinge pins 82 corresponding to the plurality of wedges 72 in the same number. In the present embodiment, the link 80 is configured in an L-shape, but the present invention is not limited thereto.

The plurality of links 80 receive the forward and backward movements of the draw bar 60 to vertically interlock the plurality of wedges 72 along the central axis of the spindle 12 along the radial axis.

One end of each of the plurality of links 80 is pivotally coupled to the plurality of pivot grooves 42a of the connector 40, and the other end of the plurality of links 80 is formed on each rear side of the plurality of wedges 72. The grooves 72a are pivotally coupled to each other.

The chuck 16 is mounted and removed by the wedge 72 on the front surface of the chuck clamp 70.

Therefore, the back side of the chuck 16 has a plurality of coupling grooves (16a) as a coupling means that the plurality of wedges 72 can be coupled or removed according to the operating direction.

The coupling groove 16a is formed on the inner circumferential surface of the rear end of the chuck 16 in the same number as the wedge 72, and preferably has a tapered surface.

One end of the plurality of links 80 is connected to the draw bar 60 through the connector 40, so that the draw bar 60 moves forward and backward in the axial direction of the spindle 12. The 60 rotates the plurality of links 80 at the same time with the hinge pin 82 as the axis.

That is, when the draw bar 60 moves forward, the link 80 rotates counterclockwise in FIG. 2, and at the same time, the wedge 72 connected to the link 80 is coupled to the engaging groove 16a of the chuck 16. The chuck 16 is mounted to the chuck clamp 70.

As such, the present invention uses the actuation force of the actuator 50 to operate the wedge 72 through the link means assembled to the chuck clamp 70 mounted at the tip of the spindle 12 via the draw bar 60. The coupling means of (16) is clamped or unclamped.

Here, the link means is a term including a connector 40 and a link 80, and a connecting means for connecting the link 80 and the wedge 72, the wedge 72 with respect to the linear motion of the draw bar 60 ) Means all means to convert to vertical motion.

Therefore, the connector 40, the link 80, the wedge 70 may be modified in various forms to achieve the object of the present invention. For example, the link 80 and the connector 40 and the link 80 and the wedge 72 may be configured to engage teeth.

In addition, when the connector 40 is formed integrally with the draw bar 60, the structure of the tip portion of the draw bar 60 may appear in the form of the connector 40.

And the coupling means (16a) provided in the chuck 16 is determined according to the coupling portion of the wedge 72, it can be variously modified according to the coupling shape of the wedge 72.

On the other hand, between the inner peripheral surface of the distal end of the spindle 12 and the outer peripheral surface of the distal end of the draw bar 60, a plug 30 for preventing intrusion of foreign matter or cutting oil is mounted to the spindle 12 with a fastening bolt B2. have.

Reference numeral 5 denotes a body of the main shaft to which the spindle is mounted.

The operating state of this embodiment configured as described above will be described.

1 and 2B show a state where the chuck 16 is in contact with the chuck clamp 70 in an unclamped state.

In the unclamped state of the chuck 16, the draw bar 60 is retracted to the left in FIG. 1, and the plurality of wedges 72 are separated from the engaging groove 16a of the chuck 16.

The replacement operation of the chuck 16 is performed while the spindle 12 is stopped. When the actuator 50 is operated while the spindle 12 is stopped and the draw bar 60 moves forward to the right, the connector 40 connected to the tip of the draw bar 60 simultaneously moves the plurality of links 80. Rotate counterclockwise as in Figure 2a.

Accordingly, the plurality of links 80 moves the plurality of wedges 72 in a radially outward direction while rotating about the pivot shaft 82, and the wedges 72 are provided in the coupling grooves 16a of the chucks 16. The taper is coupled and the chuck 16 is clamped and mounted on the front of the chuck clamp 70.

On the other hand, if the operator needs to replace the other chuck 16 must be removed.

In this case, when the hydraulic cylinder 50 is operated in the opposite direction, the wedge 72 can be easily separated from the chuck 16 to easily remove the unclamped chuck 16.

That is, when the actuating rod 52 of the hydraulic cylinder 50 is retracted, the draw bar 60 and the connector 40 connected to the actuating rod 52 move to the left side, and at the same time a plurality of links connected to the connector 40 80 rotates clockwise as shown in FIG. 2B about pivot axis 82. The clockwise rotational force of the link 80 is transmitted to the wedge 72 so that the plurality of wedges 72 simultaneously move on the centerline of the chuck clamp 70 to release the coupling force with the chuck 16 to unclamp.

As such, the present invention controls the operation direction of the hydraulic cylinder 50, thereby performing the clamping and unclamping of the chuck 16 so that the chuck change operation can be performed simply and quickly.

As described above, according to the chuck changer of the present invention, the chuck is not mounted to the spindle by bolts as in the related art, but is dismantled and assembled by bolts when the chuck is replaced by the wedge operated by the actuator.

Therefore, the maneuver of the chuck change work is reduced, the work speed is improved, and also the chuck change work is easy and easy because the chuck can be easily clamped / unclamped by controlling the direction of the actuator.

Claims (3)

As an exchange device for attaching and detaching the chuck 16 to the spindle 12 of a CNC machine tool, An actuator (50) mounted to the rear end of the spindle (12); A draw bar (60) disposed on the central axis of the spindle (12) and connected to the actuator (50) to move forward and backward; A chuck clamp (70) mounted at the tip of the spindle (12); A plurality of wedges 72 disposed circumferentially at regular intervals on a front surface of the chuck clamp 70 and slidably coupled in a radial direction; The plurality of wedges 72 are hinged to the chuck clamp 70 in the same number and correspond to the plurality of wedges 72 and receive the forward and backward movements of the draw bar 60 to transfer the plurality of wedges 72 to the spindle 12. Linking means for vertically interlocking radially along an axis; Chuck exchange of the CNC machine tool, characterized in that formed on the back side of the chuck 16 mounted to the chuck clamp 70, the coupling means for engaging or removing the plurality of wedges 72 in accordance with the operating direction Device. The method of claim 1, wherein the link means, A connector 40 mounted to the tip of the draw bar 60 and having a plurality of grooves on a surface thereof; One end is coupled to the plurality of grooves of the connector 40, the other end is composed of a plurality of links (80) respectively coupled to the plurality of grooves (72a) formed on each back side of the plurality of wedges (72) Chuck exchanger for CNC machine tools. The method of claim 1, wherein the coupling means, The rear side of the chuck 16 is characterized in that the outer end of each of the wedge 72 is formed of a plurality of coupling grooves (16a) that can be inserted in a predetermined amount corresponding to the vertical direction in which the plurality of wedges 72 operates Chuck exchanger for CNC machine tools.