JPS61228902A - Woodworking plane turning type upper surface cutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a plane turning type top cutting machine for woodworking.
This invention has a field of application in which a single planar rotary cutter is used to cut the upper surface of a workpiece such as a circular plate or a rectangular plate having a medium to long length exceeding the diameter of the cutter.

(Prior art) The conventional plane turning type upper surface cutting machine was developed in U.S. Pat. No. 59-12603.
As disclosed in the above publication, a plurality of plane cutting cutters corresponding to the width of the workpiece are lined up in a direction perpendicular to the feed direction of the workpiece in a staggered manner to cut the workpiece.

(Problems to be Solved by the Invention) The foregoing cutting mechanism requires an extremely large amount of time to adjust the height of the cutting edge of each cutter, resulting in an old-fashioned and low efficiency. In other words, when adjusting the height of the cutting edge, it is necessary to make all the cutting edges of multiple cutters the same height, otherwise cutting steps will occur, and the a-alignment must be made with a high precision of about 1/100 to 3/100 ma+ or more. Not only does this require skill, but it is difficult to complete SII alignment in one go, and trial cutting must be repeated several times to remove cutting steps.

(Means for Solving the Problems) Except for the above-mentioned drawbacks, the present invention eliminates the cutting edge height of a single plane cutter for circular, rectangular, etc. workpieces that sit on a rotary table! A rotary table is provided on which the workpiece is mounted, and on the upper surface of the rotary table, there is a plane rotating shaft that passes through the center of the table and moves from side to side. It is characterized by the provision of a sharpening cutter.

(Example) An embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, (1) is the machine base, and the guide rails (2), (2) in the X direction
) is provided on the top surface of the machine base (1), and the Pass it parallel to the guide rails (2) and (2) on the bottom surface.

A table (7) that is fitted into the guide rails (2) and (2) to allow free movement in the X direction is provided on the top surface of the machine base (1), and from the table there is a groove in the X direction provided in the machine base (1). (not shown) and the engaging piece (8) protruding from the bottom surface of the feed screw (
4). In addition, the table (7) has two rotary tables (13) arranged in the X direction, a rotation center shaft (14) fixed to the bottom surface of (13a), and a rotary support # (9) that passes through the rotation center shaft (14) <14a). , (9a) are fixed. S branch (9),
(9a) has wheel supports (10), (11), and (12) as shown by cutting away the import portion (9) on the right side of Fig. ), (14m) and the sprockets (15), (15m) fixed to the lower ends of the rotation center shafts (14), (14a), respectively, and the motor bracket (16L (16
Chains (19) and (19a) are hung between the sub-block cables (18) and (18a) fixed to the main shafts of the rotating motors (17) and (17a) attached to a), respectively.

A pair of left and right support columns (21) are attached to the machine base (1) from both sides,
(21) is protruded, and a guide frame (22) in the Y direction is fixed between the support column (zl) and the upper part of (21). Guide frame (22)
A pair of upper and lower movement guide rails (23), (23) are provided, and each guide rail (23), (23) is provided with a vertical surface (24).
) with a movable joint (25), one elbow (26), (
26), and a protrusion (27) is provided that protrudes into the guide frame (22) from between the guide rails (23), (23).
Furthermore, a vertical lifting guide rail (24) is provided on the vertical surface (24).
8) and (28) are provided.

Inside the guide frame (22), a Y-direction feed screw (30) connected to the main shaft of a cutter feed 9 motor (29) attached to one support column (21) is supported through the Y-direction feed screw (30). 30) and the aforementioned protrusion (27) is screwed into it. In addition, in the movable shaft (25), a lifting motor (32) fixed to the main shaft of the lifting motor (32) fixed to the upper surface is attached to the vertically exposed part (31) between the lifting guide rails (28), (28). Feed screw (33
) hangs down, and the protruding pieces (34) protrude into the four recesses (31) of the movable cutter holder (24) from the rotating cutter holder (34), which is fitted into the lifting guide rails (28) and (28) so as to be freely adjustable up and down.
) to the elevating feed screw (33). A movable cutter holder (34) has a movable cutter holder (34) protruding from the movable part (25) to the right in Figure 1, and is equipped with a cutter rotation motor (36) and a rotation shaft (37) connected to the main shaft of the motor. Attach the plane turning cutter (38) and turn the turning cutter (
38) is moved across the center of the upper surface of either the rotary table (13) or (13a) in the Y direction by reversible rotation of the Y direction feed screw (30).

The planar rotary cutter (38) is conventionally known and has a plurality of cutter blades with vertical cutting surfaces on the circumferential surface.

In this embodiment, as shown in Fig. 3.4, the rotary table (1
3), the workpiece (4) is placed at the center of rotation of either one of (13a).
Align the centers of the rotary tables (13) and (
On the upper surface of 13a), a large number of chucks (40), which are freely movable in a plurality of chuck movement grooves (39) provided in a radial direction from the center, are applied to the periphery of the workpiece (42), and the chucks (40) are 41) into the chuck moving groove (
39) is fixed by pressure contact with the groove bottom, and the table selection motor (3) reversibly rotates the X-direction feed screw (4) to move the planar rotating cutter (38) in the Y-direction through the center. position and move the flat rotary cutter (38) to the second position.
Y of the rotary table <13) (or (13a)) shown in the figure
The lifting motor (32) and the lifting feed screw (
33) to match the top surface of the workpiece (42) to be cut, and the rotation motor (17) (or (17a))
19) (or (19a)) to the rotary table (13).
) (or (13a)) on a horizontal plane and simultaneously move the cutter (25) in the Y direction by rotation of the cutter feed motor (29) and the Y direction feed screw (30). presses the limit switch Ls+ in one direction to change the polarity, so the turning motor (36) is started and the flat turning cutter (38) is turned.

At that time, the rotation of the rotary table (13) (or (13a)), the rotation of the plane turning cutter (38), and the workpiece (
The surface of the workpiece is cut to a certain level by rotating the center of the cutter (42) in the Y direction.
38) passes through the center of the workpiece (42), at the same time, the lifting motor (32) and the lifting feed screw (33) are rotated in the opposite direction to the above, and the plane rotating cutter (38) is pulled upward for cutting. Pause processing. During the cutting process, the workpiece (42) to be cut next time is placed on the other rotary table (13a) (or (13)) using the chuck (40).
As soon as the previous cutting process is completed, the table (7) is moved by the
8) Remove the cut workpiece (42) from the rotary table that has been moved from the lower surface and replace it with a new unprocessed workpiece. During this replacement, the rotary table (13) (or (13)
a)) will not be rotated.

In this embodiment, the rotary table (13) or (13a
) and the rotation speed of the flat rotary cutter (38) are always the same, the relative rotational speed of the flat rotary cutter (38) is different between the periphery and the center of rotation of the workpiece (42), In the center the relative rotational speed decreases.

In this embodiment, as the first plan, a flat rotating cutter (38)
The moving speed of the cutter (38) is kept constant, and as the cutter (38) approaches the center of the rotary table (13) or (13a), it is sensed and the rotation speed of the rotation motor (17) or (1)a) is increased. , as a second option, a rotation motor (17)
Alternatively, by increasing the rotation speed of the cutter feed motor (29) while keeping the rotation speed of (17a) constant, the above-mentioned relative rotation speed is maintained in harmony, and the rotation motor (1) of plan # & 1) Alternatively, although a normal motor is used as the cutter feed motor (29) in (1)a) and the second plan, a pulse motor or a servo motor may also be used for these.

Figure 5 shows a flat rotating cutter (3
8), the amount of movement from the periphery of the rotary table (13) or (13a) across the center of rotation is determined by the cutter feed motor (2).
Rotation motor (17) or (17a) configured by a normal motor based on the rotation speed measured by 9)
When a speed increase command is given to the rotary table (13) or (13a)
) is shown, and Figure 6 shows the step diagram of the first plan to increase the speed of
It is a time chart figure based on a plan.

The rotation speed of the cutter feed motor (29) is constant, and the dregs in the decimal digit ring of counter C is driven by a pulse train to a proximity switch mounted across a slit plate fixed to the rotating part of the motor, and the rotation speed is made. The first set point C outputs every t2
I, second set point C2, . . . drives the arithmetic unit CPU by the output signal of the nth set point to calculate the rotational speed of the rotation motor (1)) or (17a), and the D/^ converter, Rotation motor (1)) or (1)a by driving the V/F converter
) to increase the speed of the rotary table (13), (13a) and the workpiece (4Z), and make the relative rotational speed with the flat rotating cutter (38) almost uniform from beginning to end. The details will be explained with reference to FIG. 6. The start switch SII rotates the lifting motor (32) and the table selection motor (3), and as already explained, the rotation table (13), (13a) is rotated. A flat rotary cutter (38) whose one center is moved by a Y-direction feed screw (30).
) is completed, and when the rotary table (13) selectively moves to the position where the rotary table (13) passes, the rotation motor (1
7) by rotating the cutter rotation motor (36) and the cutter feed motor (29) in one direction, and at the same time as the moving tool (25) contacts the limit switch Ls+, the date on the counter C is adjusted, and the proximity switch is activated. The generated pulse train is input to the counter C to instruct the rotation motor (17) to increase its rotational speed for the first time, and in this state, the planar rotating cutter (38) starts cutting from the rotating peripheral portion of the workpiece (42). Start.

The counter C is rotated by the cutter feed motor (29).
When the first signal is output at #11 fixed point C1, the arithmetic unit CPU calculates the signal as described above, and the second signal is sent to the rotation motor (17) via the D/^ converter and V/F converter.
The rotation motor (17) is commanded to increase its speed once, and at each of the second set point C2 and the nth set point Cn, the rotation motor (17) is commanded to increase its speed a third time and an nth time. In this way, when the plane turning cutter (38) passes the center of rotation of the rotary table (13), the counter C completes the speed increase constant of the motor (17), and the calculation unit C
A count-up signal is sent from the PU, and the count-up signal stops the rotation motor (17), reverses the lifting motor (32) (raises the plane swing cutter (38)), and starts the cutter feed motor (29). Reverse rotation (return movement of the planar rotating cutter (38)) is commanded, and the cutter (
38) with the return to the original position - completes the cutting operation of the cycle.

The speed increase command setting point of the counter C and the rotation motor (
By setting the speed increase rate of 17) according to the material, shape, etc. of the workpiece (42), it is possible to achieve optimal harmony between the relative rotational speeds of the rotary motor (17) and the plane cutting cutter (38). can.

The second plan is to keep the rotational speed of the rotation motor (1)) or (1)a constant and adjust the moving speed of the plane cutting cutter (38) across the center top surface of the rotary table (13) or (13m); This is to keep the machining speed at the periphery and center of the workpiece almost constant, and the rotational speed of the cutter feed motor (29) and Y-direction feed screw (30) is adjusted by changing the rotation speed of the cutter feed motor (29) and the Y-direction feed screw (30).
38) by increasing the moving distance from the periphery on the rotary table (13) or (13m). In this case, the position of the plane cutting cutter (38) is determined based on the rotation speed of the cutter feed motor (29) in the same manner as shown in FIG. increases as follows.

(Operations and Effects of the Present Invention) The present invention is configured so that one cutting cutter passes through the center of the top surface of the rotary table and moves from side to side, and the plane cutting cutter is used for processing at the center of the top surface of the rotary table. It can be applied to both cases where the workpiece is pulled up from the workpiece and subjected to one-time cutting, and when double-sided cutting is performed across the peripheral edge and center of one side of the workpiece, as well as across the peripheral edge of the other side. Since only one plane cutting cutter is used, there is no need to carefully adjust the height of the cutting edge, and it can be adapted to cutting round natural wood, rectangular table boards, etc.

[Brief explanation of drawings]

Figures 1 to 4 illustrate the present invention; Figure 1 is a partially cutaway side view, Figure #I2 is a front view of the same, and Figure 3 is a rotary table (1
3) ((13a)), and FIG. 4 is an enlarged side view taken along line A-A in FIG. Fig. fJ5 is a step diagram illustrating an example of the present invention, and Fig. 6 is a time chart thereof. (1) → Machine base (2) → Guide rail (3) → Table selection motor (4) → X direction feed (7) → Table (9), (
9a) - Pivot support tube (13), (13m) → Rotary table (14), (14a) → Rotation center lees (1)) (17m) → Rotation motor (21) → Support column (22) → Guide frame (23) → Movement guide rail (25
) → Movement A (28) → Lifting guide rail (29) → Cutter feed motor (30) → YY direction feed screw (32) → Lifting motor (
33) → Lifting feed screw

Claims (1)

[Claims] For woodworking, characterized in that a rotary table for attaching workpieces is provided, and a plane turning cutting cutter that passes through the center of the table and moves from side to side is provided on the upper part corresponding to the upper surface of the rotary table. Plane rotating upper cutting machine.