JP2995245B2 - NC router floating head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention adjusts the working depth of a work plate by moving the setting member and tool up and down together while bringing the reference surface of the work member into contact with the surface of the work plate. The floating head of the NC router.

[0002]

2. Description of the Related Art As shown in FIG. 2, FIG. 3, and FIG. 4, the applicant has mounted a rail 2 on a support 1 and a head structure 3 on this rail 2 at the left and right of FIGS. A plurality of heads 4 (four in the figure) are mounted on the head structure 3, and a tool changing device 5 and a tool magazine 6 are mounted on the side of the head 4. A large number of tools 7 are mounted on the magazine 6, a rail 8 is mounted on the support 1 below the head 4, and a table 9 is mounted on the rail 8 so as to move forward and backward of the head 4.
Further, a duct 10 is mounted on the upper part of the head 4, a valve (not shown) which is opened and closed by a cylinder 11 is provided on the duct 10, and a hose (not shown) is connected to the duct 10. Has been proposed near the lower end of the head 4 and configured to absorb chips and debris on the table 9.

In this NC router, as shown in FIG. 5, in the head 4, the main shaft 12 is provided with bearings 16, 17 mounted on support portions 14, 15 provided on the upper and lower portions of a case 13, respectively. The main shaft 12 is rotated by a motor 19 inside the case 13.

A central shaft 21 is urged upward by a spring 20 inside the main shaft 12, and a holder holding portion 22 is provided at a lower end of the main shaft 12 for holding a support end 23a provided on an upper portion of a holder body 23. When the main shaft 12 is pulled upward by the spring 20, the holder main body 23 is held by the taper inside the main shaft 12.

Further, the holding groove 2 is provided below the holder body 23.
3b is provided, and a tool holding portion 23c for holding a tool is provided at the lower end of the holding groove 23b. The tool is exchanged together with the holder body 23 by holding the holding groove 23b with a tool changing device (not shown). It is configured as follows.

[0006]

However, in the head of the NC router constructed as described above, the processing is performed while the vicinity of the tool is brought into contact with the surface of the plate to be processed, and the unevenness of the surface of the plate is copied. A head capable of making the processing depth from the surface constant is desired, but such a head has not yet been proposed.

[0007]

According to the present invention, there is provided a head for connecting a tool holder having a tool holding portion for mounting a tool such as a cutter by a connecting means provided on a support portion to a spindle rotated by a spindle motor. A rotation blocking member for connecting a spline shaft provided with the tool gripping portion to a holder body of a tool holder and slidably mounting the holder body up and down, and blocking rotation of the holder body by a first bearing. A sliding member is fitted below the rotation blocking member via a gap, and a second bearing is interposed between the sliding member and the spline shaft to block rotation of the spline shaft; The spline shaft and the sliding member are configured to slide up and down together so that the spline shaft and the sliding member are always urged toward the tip of the tool by a spring. A mounting member is fixed to a lower portion of the sliding member, and a setting member is mounted on the mounting member, and a reference surface of the setting member is moved up and down so that the reference surface of the setting member comes into contact with a workpiece plate. The processing is performed by setting the depth from the surface of the plate to be processed by the tool to a desired value, and the setting member is screw-fitted to the mounting member, and the setting member is rotated. To adjust the reference surface of the setting member up and down, and further from the connecting portion of the support portion to the passage of the tool of the contact member from the sliding member via the connecting portion of the rotation stopping member. The air is supplied to blow off the wood chips processed by the tool.

[0008]

According to the present invention, the rotation of the rotation blocking member and the holder body is blocked by the first bearing provided around the rotation shaft of the holder body, and the spline shaft is connected to the center hole of the holder body to be connected to the holder body. On the other hand, the spline shaft is configured to slide up and down, the first bearing is configured not to transmit the rotation of the tool holder to the rotation blocking member, and the sliding member is inserted into the rotation blocking member with a gap. A second bearing for blocking rotation of the spline shaft is provided between the sliding member and the spline shaft, and mounted so that the sliding member and the spline shaft can both move up and down, and mounted on the lower end of the sliding member. By fixing the member, mounting the setting member on the mounting member, and adjusting the reference surface at the lower end of the setting member, it is possible to perform processing by arbitrarily setting the processing depth from the surface of the plate to be processed.

[0009]

FIG. 1 is a partial sectional view of a floating head of an NC router according to an embodiment of the present invention. A holder main body 23 has a support end 23a and a tool gripping groove 23b. The spline shaft 23 is provided at the lower end of the center hole 23d.
The tool gripper 23c is mounted on the spline shaft 23e so that the tool gripper 2c can be slid up and down.
A tool 24 is mounted on 3c.

Further, a rotation blocking member 26 is mounted on the holder body 23 via a first bearing 25, and the rotation of the holder body 23 is blocked by the rotation blocking member 26.

A rotation stopping member 27 is fixed to a side portion of the rotation blocking member 26. The rotation stopping member 27 has a connecting portion 27a at the upper end provided on the supporting portion 15 of the head 4.
And the rotation blocking member 26 blocks rotation of the rotation blocking member 26. Further, the rotation stopping member 27
c, a spring 30 is mounted between the inner member 27b and the outer member 27c, and a supporting member 27d provided at a coupling portion 27a of the rotation stopping member 27 is a rotation blocking member 2.
6 is slidably mounted.

Further, a sliding member 28 is fitted into a fitting hole 26a provided at a lower portion of the rotation blocking member 26, and the sliding member 28 is connected to a spline 23e by a second bearing 29 and is vertically moved together. As you move,
The rotation of the spline shaft 23e is configured not to be transmitted to the sliding member 28, and the pin 3 is inserted into the insertion hole 26b provided in the rotation blocking member 26 and the insertion hole 28a provided in the sliding member 28.
1 is inserted, and a spring 32 is inserted into the insertion hole 28a to push up the pin 31 so that the sliding member 28 can be slid up and down with respect to the rotation blocking member 26.
1 prevents rotation of the sliding member 28, and the spring 32 constantly urges the sliding member 28 and the spline shaft 23 e in the direction of the tool 24.

A mounting member 34 is fixed to the lower portion of the sliding member 28 with a screw 33, and a setting member 35 is screwed to the mounting member 34.
An insertion hole 35b through which the tool 24 protrudes is formed from the reference surface 35a.
The distance between a and the tip of the tool 24 is set. Further, a lock screw 36 for locking the set position of the setting member 35 is provided on the mounting member 34, and the sliding member 28 is prevented from falling out of the rotation blocking member 26. The retaining 37 is fixed by a screw 38.

The air supply hole 1 provided in the support member 15
5b is connected to a connection hole 27e provided in the rotation stopping member 27, furthermore, the connection hole 27e of the rotation stopping member 27 is connected to a connection hole 26c of the rotation blocking member 26, and the connection hole 26c is connected to the sliding member 28. The connection hole 28b is connected to the insertion hole 3b of the setting member 35.
5b, and wood chips and the like generated during processing are blown off.

In the thus constructed floating head of this embodiment, the holder main body 23 is gripped by the tool changing device, and the holder holding portion 22 of the head 4 shown in FIG.
After the connecting portion 27a of the rotation stopping member 27 is connected to the connecting portion 15a provided on the support portion 15 of the head 4,
When the motor 19 of the head 4 rotates, the rotating shaft 21 rotates to rotate the tool holder 23. However, the rotation blocking member 26 blocks the rotation of the tool holder 23 by the first bearing 25, and the sliding member 28 Since the rotation of the spline shaft 23e is not transmitted by the second bearing 29, and the spline shaft 23 and the sliding member 28 are both moved up and down, the spline shaft 23e is fixed to the mounting member 34 provided on the sliding member 28. When the reference surface 35a of the setting member 35 is brought into contact with the plate to be processed and processed, the reference surface 35a of the setting member 35 mounted on the sliding member 28 and the tool holding portion 2 of the spline shaft 23e are used.
Since the tool 24 mounted on the workpiece 3c moves up and down to machine the workpiece, the machining depth from the surface of the workpiece is set as set, and the surface of the workpiece is set to the reference surface of the setting member. It can be processed while copying.

[0016]

As described above, in the floating head according to the present invention, the sliding member is inserted into the rotation blocking member and the rotation blocking member is moved up and down together with the spline shaft. Since the setting member is provided on the member, the reference surface of the setting member is set, and the setting member and the tool are both moved up and down while the reference surface of the setting member is in contact with the surface of the plate to be processed. There is an advantage that it is possible to perform processing by setting the processing depth arbitrarily while following the processing surface of the work plate.

[Brief description of the drawings]

FIG. 1 is a sectional view of a floating head according to an embodiment of the present invention.

FIG. 2 is a front view of an NC router.

FIG. 3 is a plan view of the NC router of FIG. 1;

FIG. 4 is a side view of the NC router of FIG. 1;

FIG. 5 is a sectional view of a head of the NC router of FIG. 1;

[Explanation of symbols]

 23 Holder main body 23d Center hole 23e Spline shaft 24 Tool 25 First bearing 26 Rotation blocking member 27 Rotation stopping member 28 Sliding member 29 Second bearing 30 Spring 31 Pin 32 Spring 33 Screw 34 Mounting member 35 Setting member 36 Lock screw 37 Retaining screw 38

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B27C 9/04 B27C 5/00 B27G 13/10 B27C 3/00 B27C 5/10

Claims (3)

(57) [Claims] 1. A head for connecting a tool holder having a tool holding portion for mounting a tool such as a cutter by a connecting means provided on a support portion to a spindle rotated by a spindle motor,
A spline shaft provided with the tool holding portion is connected to a holder main body of the tool holder, and is mounted slidably up and down on the holder main body, and rotation is shut off by a first bearing on the holder main body. A member is provided, a sliding member is fitted below the rotation blocking member via a gap, and a second bearing is interposed between the sliding member and the spline shaft to block rotation of the spline shaft. The spline shaft and the sliding member are configured to slide up and down together so that the spline shaft and the sliding member are always urged toward the distal end of the tool by a spring. A mounting member is fixed to a lower portion of the member, a setting member is mounted on the mounting member, and a reference surface of the setting member is moved up and down to adjust the reference surface of the setting member to be in contact with a plate to be processed. tool Floating head of the NC router, characterized in that processing by setting the depth from the surface of the work plate to a desired value by. 2. The N according to claim 1, wherein the setting member is screw-fitted to the mounting member, and the setting member is rotated to adjust the reference surface of the setting member up and down.
Floating head of C router. 3. The floating head according to claim 2, wherein air is supplied from the sliding member to a tool passage of the setting member to blow off wood chips processed by the tool.