KR200206715Y1 - Device for fixing a cutter to a spindle of milling machine - Google Patents

Abstract

According to the present invention, the coupling and the housing are fixed to the headstock of the milling machine in turn, and then the driving rotor is coupled to rotate integrally with the spindle in the housing, and the driven member is rotated together with the driving rotor through the power transmission means. By installing the rotor, the cutter fixing device for the milling machine that can cut the long groove bottom surface of the long workpiece while the cutter mounted on the bottom of the driven rotor rotates according to the rotation of the driven rotor transmitted from the driving rotor through the timing belt. The cutter fixing device comprises a coupling (10) fixed to the spindle head (2) of a milling machine in which the spindle (4) is rotatably installed, and a coupling bolt (12) of the coupling (10). The rectangular housing 20 fixed to the lower part is coupled to the upper end to be integrally rotated with the spindle 4, and is rotatable to one end of the housing 20 by a bearing 42. And a driven rotor 50 to which the cutter is mounted, the driven rotor 50 is fixed to the lower part, and is rotatably mounted to the other end of the housing 20 by a bearing 52, and the driving rotor 40. It consists of a power transmission means for transmitting the rotational force of the driven rotor (50).

Description

Cutter holding device for milling machine {DEVICE FOR FIXING A CUTTER TO A SPINDLE OF MILLING MACHINE}

The present invention relates to a cutter fixing device for a milling machine, and more particularly, after the drive rotor is mounted on the main shaft of the milling machine, the rotational force of the drive rotor is transmitted to a driven rotor with a cutter through a power transmission means. The present invention relates to a cutter fixing device for a milling machine configured to process a long groove bottom surface of a long workpiece.

The milling machine widely used in the machining field is a device mainly used to cut the surface of the workpiece, and in addition to the smoothing operation, it is used to move grooves or steps on the surface of the workpiece.

However, the conventional milling machine has a disadvantage in that it is not possible to process the bottom surface or the corner portion of the long groove formed on the long workpiece by using a cutter vertically fixed to the headstock.

The present invention for solving such a problem can cut the long groove bottom surface of long workpieces by rotating the cutter by transmitting the rotational force of the spindle installed on the main shaft of the milling machine to a predetermined distance. It is an object of the present invention to provide a cutter fixing device for a milling machine.

1 is a front view showing a partial cross-sectional view to show the mounting state of the cutter fixing device for a milling machine according to the present invention,

Figure 2 is a plan view showing a partial cross-sectional view to show the configuration of the cutter fixing device for a milling machine according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

2: headstock 4: spindle

6: bed 8: workpiece

8a: long groove 10: coupling

20: housing 22: lower cover

26: upper cover 30: timing belt

32: driven pulley 34: driven pulley

40: drive rotor 40a: coupling protrusion

42, 52: Bearing 44, 54: Bearing cap

48, 58: height 50: driven rotor

60: cutter 62: fixing bolt

The object of the present invention described above is a coupling fixed to the main shaft of the milling machine in which the spindle is rotatably installed, a rectangular housing fixed to the lower portion of the coupling by a fastening bolt, etc., and an upper end rotated integrally with the spindle. A driving rotor coupled to be rotatably mounted to one end of the housing by a bearing, a driven rotor fixed to a cutter and rotatably mounted to the other end of the housing by a bearing, and a rotational force of the driving rotor It is achieved by a cutter fixing device for a milling machine comprising a power transmission means for transmitting to the driven rotor.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the cutter fixing device for a milling machine according to a preferred embodiment of the present invention.

First, FIG. 1 is a view showing a state in which a cutter fixing device according to the present invention is fixed to a headstock 2 of a milling machine shown as an imaginary line, and a part of components is illustrated in a cross-sectional state for clarity.

Typically, the spindle 4 of the milling machine is rotatably mounted, and the cutter 8 is rotated through the spindle 4 to cut the work 8 placed on the bet 6. Done. In such a milling machine, the long groove 8a of which the long groove 8a is formed. In the preferred embodiment of the present invention, the long groove 8a of the workpiece 8 is provided via the coupling 10. After attaching a long rectangular housing 20 that can be inserted into the headstock 2, the rotational force of the spindle 4 is applied to the driven rotor 50 with the cutter 60 attached thereto. Adopted a structure equipped with a power transmission means that can be transmitted to).

In more detail, the coupling 10 is fixed to the headstock 2 of the milling machine by bolts 12. At this time, the coupling 10 has a shape in which a part is cut to provide the spaced space portion 11 as shown in FIG. 2. In addition, near the space 11, a bolt mounting hole 10a into which the head of the bolt 12 is inserted for fastening and a screw hole 10b to which the screw portion of the bolt 12 is coupled are formed. have. At the time of coupling, first, the coupling 10 is inserted into the headstock 2 of the milling machine, and then the bolt is inserted into the bolt mounting hole 10a to rotate. By coupling and fastening, the coupling 10 may be firmly assembled.

The rectangular housing 20 of the present invention is fixed to the lower portion of the coupling 10 by bolts 14. At one end of the housing 20, the drive rotor 40 is rotatably mounted by a bearing 42, and at the other end, the driven rotor 50 is rotatably mounted by a bearing 52. In addition, the housing 20 is provided with a timing belt 30 as a power transmission means for transmitting the rotational force of the drive rotor 40 to the driven rotor 50.

In addition, the coupling protrusion 40a is formed at the upper end of the driving rotor 40 rotatably mounted to one end of the housing 20 by the bearing 42 so as to be integrally rotated by being coupled to the spindle 4. have. In the present embodiment, the shape of the coupling protrusion 40a has a straight shape as shown in FIG. 2, but in some cases, instead of the straight shape, the coupling protrusion 40a may have a cross shape or a groove shape instead of the protrusion shape. It is also possible. The drive pulley 32 is fixed to the outer circumferential surface of the drive rotor 40 by a key 48, and a bearing cap 44 for preventing separation of the bearing 42 is coupled to the lower end thereof by a screw 46. have.

At the other end of the housing 20, a driven rotor 50 is rotatably mounted by a bearing 52. A cutter 60 for flat grinding is fixed to the lower portion of the driven rotor 50 by the fastener 62. Like the drive rotor 40, the driven pulley 34 is fixed to the outer circumferential surface of the driven rotor 50 by the key 58, and a bearing cap 56 for preventing the bearing 52 from being detached is fixed to the upper end of the driven rotor 50. It is. The upper cover 26 is attached to the upper end of the bearing cap 56 by the bolt 28, and the lower cover 22 is attached to the lower part of the housing 20 by the bolt 24.

Next, the configuration of the power transmission means for transmitting the rotational force of the drive rotor 40 to the driven rotor 50, the drive pulley 32 is fixed to the outer peripheral surface of the drive rotor 40 by the key 48 ), A driven pulley 34 fixed to the outer circumferential surface of the driven rotor 50 by the key 58, and a rotational force transmitted from the spindle 4 via the driving rotor 40 to the driven rotor ( And a timing belt 30 wound around the drive pulley 32 and the driven pulley 34 so as to be transferred to the head 50. Therefore, when the driving rotor 40 rotates together with the spindle 4, the driving pulley 32 fixed to the driving rotor 40 rotates together, and the rotational force of the driving pulley 32 is the timing belt 30. It is transmitted to the driven pulley 34 through) to enable the rotation of the driven rotor (50).

Next, an operation relationship of the fixing device for a milling machine having such a configuration will be described.

When the milling machine is operated in a state where the workpiece 8 having the long groove 8a is fixed to the bed 6 of the milling machine, the spindle 4 installed on the main stem 2 rotates. At this time, since the driving rotor 40 is coupled to the lower portion of the spindle 4, the driving rotor 40 rotates together with the spindle 4 in a state supported by the bearing 42. Next, as described above, the rotational force of the drive rotor 40 is transmitted in the order of the drive pulley 32-the timing belt 30-the driven pulley 34 to rotate the driven rotor 50. As the driven rotor 50 rotates, it becomes possible to cut the bottom surface of the long groove 8a while the cutter 60 attached to the lower portion thereof rotates at high speed.

According to the present invention described above, by transmitting the rotational force of the drive rotor coupled to the spindle of the milling machine to the driven rotor with a cutter through the power transmission means, the cutter attached to the lower portion of the driven rotor is rotated long Since the bottom surface of the long groove of the workpiece can be cut, the utilization range of the milling machine can be extended and the width of the milling operation can be expanded.

Claims (3)

Coupling 10 is fixed to the spindle head 2 of the milling machine rotatably installed spindle 4, A rectangular housing 20 fixed to the lower portion of the coupling 10 by a fastening bolt 12 or the like, A driving rotor 40 coupled to the upper end to be integrally rotated with the spindle 4 and rotatably mounted to one end of the housing 20 by a bearing 42; The driven rotor 50 is fixed to the lower portion and is rotatably mounted to the other end of the housing 20 by a bearing 52, Cutter holding device for a milling machine, characterized in that it comprises a power transmission means for transmitting the rotational force of the drive rotor 40 to the driven rotor (50). The method of claim 1, The power transmission means and the drive pulley 32 is fixed to the outer peripheral surface of the drive rotor 40 by the key 48, A driven pulley 34 fixed to an outer circumferential surface of the driven rotor 50 by a key 58; To the timing belt 30 wound around the drive pulley 32 and the driven pulley 34 to transmit the rotational force transmitted from the spindle 4 to the driven rotor 50 via the drive rotor 40. Cutter fixing device for a milling machine, characterized in that made. The method of claim 1, A coupling protrusion 40a is inserted into the lower end of the spindle 4 at the upper end of the drive rotor 40, and a bearing cap 44 is coupled to the lower end to prevent the bearing 42 from being separated. Cutter fixing device for a milling machine, characterized in that the bearing cap (54) is coupled to the upper end of the driven rotor (50) to prevent separation of the bearing (52).