JP2668348B2 - Board circular cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circular cutting device for a plate.

[0002]

2. Description of the Related Art Heretofore, in order to cut a circular plate or an annular plate from a considerably wide plate, the plate is cut into a square plate, which is then turned on a lathe and cut into a disk with a cutting tool.

[0003]

Therefore, the yield of the material is extremely low, the material is wasted wastefully, and it is necessary to cut the material into squares as a pre-process for lathing. Moreover, the annular plate could not be processed at once.

An object of the present invention is to solve the above-mentioned problems and to provide a circular cutting device for a plate which has a good material yield and does not use a lathe.

[0005]

In order to achieve the above-mentioned object, the constitution of the present invention is as follows. That is, a bed, a first table slidably mounted on the bed in the front-rear direction, a second table slidably mounted on the first table in the left-right direction, A surface plate mounted on a table, a discarded plate mounted thereon, a clamping means provided on the surface plate, and a main shaft having a vertical rotation axis provided above the table, A horizontally long sliding guide fixed on the rotation diameter at the lower end of the main shaft, and slidably mounted at a symmetrical position of the guide around the main shaft;
The lower end of the cutting tip on the outer side in the radial direction of rotation of the main shaft is slightly lower than the lower end of the inner cutting tip, and the main shaft is rotated to turn off the main shaft. That is, the disk or the annular plate is cut out without a core for the plate to be cut.

[0006]

The plate to be cut is placed on the discarded plate of the second table and fixed with a clamp. Then, the first table and the second table are moved, respectively, so that the rotation center line of the main shaft coincides with the circular center line of the disk to be cut out or the annular plate. Next, the spindle is lowered and rotated. Thereby, a circular plate or a circular plate is cut out.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to an embodiment shown in the drawings. 1 and 2, a rectangular first table 2 is placed on a bed 1 so as to be slidable in a front-rear direction (a direction perpendicular to the sheet of paper). 2), the second rectangular table 3 is slidably mounted. Then, on the second table 3, a rectangular surface plate 4,
A rectangular synthetic resin discard plate 5 is mounted thereon with its posture adjusted. The platen 4 is provided with a clamp (not shown).

A hollow main shaft 7 having a vertical axis of rotation is provided above the second table 3. A disk 8 is fixed concentrically to the lower end of the main shaft 7, and a horizontally long sliding guide 9 having a dovetail cross section is fixed on the rotation diameter thereof. Two pairs of sliding pieces 10 are slidably mounted at symmetrical positions about the main axis of the guide and fixed by bolts, and a parting-off blade 12 is fixed thereto via a blade holder 11.

In FIGS. 4 and 5, the knife 12 comprises an elongated plate-shaped main body 12a and a detachable insert 12b provided at both ends in the longitudinal direction thereof.
An inclined flank 12c is formed behind the tip 12b. The known holder 11 in FIG. 3 includes a rod body 11a having a rectangular cross section, a blade holding portion 11b, a dovetail groove 11c, a slit 11d, and a bolt 11e.

Next, the operation state will be described above. The plate W to be cut is placed on the waste plate 5 of the second table 3 and fixed with a clamp. Then, the first table 2 and the second table 3 are respectively moved to make the rotation center line of the main shaft 7 coincide with the circular center line of the disk to be cut or the annular plate. Next, the spindle 7
Lower and rotate. Thereby, a circular plate or a circular plate is cut out.

Here, the pair of blade tips 12b sandwiching the spindle 7 are slightly displaced in the direction of the radius of rotation of the spindle, so that the width of the plate groove formed by cutting is larger than the width of the tip. It will be slightly wider. Therefore, it is easy to discharge the cutting powder upward. Therefore, the blade main body does not bend due to the clogging of the cutting powder, and the blade main body is always in an upright state, so that the cut surface of the plate is exactly 90 degrees with respect to the upper surface of the plate.

The height of the lower end of the blade tip 12b on the inner side in the rotation radial direction of the main shaft and the height of the lower end of the outer blade tip 12b are slightly lower on the outside. For this reason, the outer periphery of the ring completes the cutting first, and the inner circumferential surface of the ring ends the cutting a little later. If the inner peripheral surface of the ring is cut first, the portion remaining inside is small, causing vibration due to the cutting force, which may adversely affect the cutting of the outer peripheral surface.

FIG. 6 shows an embodiment of means for holding the center of the circle of the disk to be cut. A piston / cylinder mechanism 22 as a lifting / lowering means is installed on an arm 21 projecting forward from a column of the cutting device, and a pressing rod 2 connected to the upper end thereof.
Reference numeral 3 penetrates the hole of the main shaft 7 so as to be able to move up and down by using a bearing 24 as a guide. Therefore, when the circular cutting is performed while pressing downward with the press pad 25, the vibration of the plate at the center portion is prevented, and the cutting accuracy and the cutting speed can be improved.

The present invention is not limited to the examples and embodiments described above, but includes various modifications without departing from the spirit and scope of the appended claims.

[0015]

According to the structure of the present invention, the disk and the annular plate can be cut out at once, the yield of the material is remarkably improved, and the work of cutting out the material for lathing is also omitted. Moreover, the outer peripheral surface is cut earlier than the inner peripheral surface of the annular plate, and the remaining pieces on the inner peripheral surface do not vibrate.

[Brief description of the drawings]

FIG. 1 is a front view of one embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of FIG.

FIG. 3 is an enlarged bottom view of the blade holder.

FIG. 4 is a side view of the blade.

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a longitudinal sectional view of another embodiment.

[Explanation of symbols]

 1 Bed 2 1st table 3 2nd table 4 Surface plate 5 Disc plate 7 Spindle 8 Disc 9 Sliding guide 10 Sliding piece 11 Blade holder 12 Blade 12a Main body 12b Tip 12c Flank surface

Claims (1)

(57) [Claims] 1. A bed, a first table slidably mounted in the front-rear direction on the bed, a second table slidably mounted in the left-right direction on the first table, The second
A surface plate mounted on a table, a discarded plate mounted thereon, a clamping means provided on the surface plate, and a main shaft having a vertical rotation axis provided above the table,
A horizontally long sliding guide fixed at the lower end of the main shaft on its rotation diameter, and two pairs of downward cutting blades slidably mounted at symmetrical positions of the guide around the main shaft. And the lower end of the blade tip on the outer side in the rotation radial direction of the main spindle is slightly lower than the lower end of the inner blade tip,
A circular cutting device for a plate, wherein the main spindle is rotated to cut out a disk or an annular plate with the parting blade without a core with respect to a plate to be cut.