KR100637758B1 - Band sawing machine - Google Patents

Abstract

A cutting device is disclosed. The cutting device disclosed includes a frame having a table on which a work piece is mounted, the frame having a space portion; A band saw assembly positioned in the space portion and including a pair of semi-arc support portions rotatably supported at a predetermined angle by supporting means mounted to the frame; Pivoting means for pivoting and positioning the band saw assembly at a predetermined angle with respect to the frame; Characterized in that it has been provided.

Description

Cutting device {Band sawing machine}

1 is a partially cutaway perspective view schematically showing a cutting device according to the present invention;

2 is a partially cutaway perspective view schematically showing the band saw assembly and the frame assembly separated from each other as main features of the cutting device according to the present invention;

3 is a schematic cross-sectional view taken along line III-III of FIG. 1 and a virtual line showing that the band saw assembly and the frame assembly, which are one of the features of the present invention, are at an angle to each other;

4 is a schematic cross-sectional view taken along the line IV-IV of FIG. 1;

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

11 ... table 13 ... band saw assembly

13b ... pulley 15 ... roller

16 ... rack 18c ... pinion

20 ... frame assembly

The present invention relates to a cutting device, and more particularly, to a cutting device that can adjust the angle of the cutting surface when processing the workpiece.

In general, the cutting device is a hack saw machine for cutting a workpiece by reciprocating a saw blade, a band saw machine for cutting a workpiece by rotating a long spaced endless saw blade, a cutting machine table In a state where a part protrudes upward, the rotary saw is inserted into the fixed shaft and rotated in place. The cutting device described above cuts the workpiece vertically so that the cut section is perpendicular to the upper and lower surfaces of the raw material.

Particularly, among the types of cutting devices described above, band saw machines, which are frequently used in mills and the like, are used to cut raw material workpieces such as honeycomb cores for aircrafts, but the cut surface of the raw material workpiece is the surface of the raw material. Because it needs to achieve a predetermined angle with a special jig is also used.

The honeycomb core is formed of a plurality of cells in a honeycomb form between a plurality of upper and lower plates, and the inside thereof is empty. Therefore, due to the unique shape of the cell, honeycomb cores are used for walls such as the fuselage of an aircraft because they are lightweight and have high compression resistance. Also, for use as a wall of a curved aircraft, honeycomb cores are formed in a plurality of block shapes. In addition, a cross section of the edge portion of the honeycomb core is formed at a predetermined angle such as 30 ° and 45 ° for the mutual coupling between the honeycomb cores in the form of a plurality of blocks.

In this process, the forming of a specific angle is performed by hand, using a blocking jig, or using a dedicated device.                         

In the case of using a blocking jig, first, a dedicated blocking jig is mounted on a cutting device, and then a workpiece, that is, a honeycomb core, which is a raw material, is mounted on the blocking jig, and then cut into a predetermined size.

However, cutting the honeycomb core using a blocking jig or using a dedicated device requires a lot of blocking jig according to the type of cutting angle, or it requires a lot of special equipment, which is expensive. It is inconvenient due to the jig replacement when the angle is readjusted. Therefore, there is a problem that the work productivity is poor.

The present invention has been made to solve the above problems, and an object thereof is to provide a cutting device that can form the cutting surface at various angles when cutting the honeycomb core.

In order to achieve the above object, the cutting device of the present invention includes a frame having a table on which a workpiece is mounted and having a space portion; A band saw assembly positioned in the space portion and including a pair of semi-arc support portions rotatably supported at a predetermined angle by supporting means mounted to the frame; Pivoting means for pivoting and positioning the band saw assembly at a predetermined angle with respect to the frame; Characterized in that it has been provided.

In the aspect of the present invention, the frame is a pair of frame plates spaced apart from each other; It is preferable to include the one provided with a; connecting plate for connecting them.

In a feature of the invention, the support means; It is preferable that it is provided on the mutually opposite surfaces of the frame plate, and provided with a plurality of rollers for supporting the upper and lower edges of the semi-arc support member.

In the feature of the present invention, the rotating means includes a rack formed along the trajectory of the half arc-shaped support of the band saw assembly, and a pinion rotated by the drive unit installed in the frame and engaged with the rack. It is desirable to.

In the characteristic of this invention, it is preferable that the said drive part includes a thing provided with the brake and provided with the geared motor.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4 show a preferred embodiment of the cutting device according to the invention.

First, referring to FIG. 1, a cutting device according to an embodiment of the present invention supports a table 11 and a table 11 having a through hole 11a having a predetermined width in a length direction on an upper surface thereof, and supporting the table 11 from below. And a frame 20 to be combined.

Referring to FIG. 2, the frame 20 includes a plurality of frame plates 12 that are “L” shaped to support the table 11 at a lower side and are arranged side by side at a predetermined interval. The frame plate 12 is coupled to the interconnecting plate 21, the upper surface is formed in an open box shape having a space portion.                     

A plurality of rollers 15 are provided in the space portion of the frame 20 on the mutually opposing surfaces of the frame plate 12, and as support means for supporting the upper and lower edges of the half arc-shaped support member 17b to be described later. The band saw assembly 13 is rotatably mounted. The rollers 15 are installed on opposite surfaces of the frame plate 12 in two rows spaced apart by a predetermined distance up and down along a concentric trajectory.

In addition, the rotating means 14 is installed in the space portion of the frame 20 to rotate the band saw assembly 13. The rotation means 14 includes a pinion 18d meshed with the rack 16, which will be described later; A first gear 19b for driving the pinion 18d; And a geared motor 19c for driving the first gear 19b. The geared motor 19c preferably has a driving force on the order of 3/4 hp.

Referring to FIG. 3, between the table 11 and the frame 20, a band saw assembly 13 is provided so as to be rotatable with respect to the frame 20 by the rotation means.

The band saw assembly 13 is provided with a subframe 17, which has a support 17b formed in a half arc shape and a pivot 17a in a substantially vertical direction from the half arc support 17b. Is formed to extend, the overall shape is made of an "L" shape, a plurality of them are arranged side by side at a predetermined interval apart. The subframes 17 are then connected by a connecting member 22 such as a pipe 22.

The pivot 17a is formed to correspond to the trajectory of the roller 15. In addition, the support 17b of the sub-frame 17 should be formed to be symmetrical with each other, the rotating portion 17a need not be mutually symmetrical, of course.

In addition, two semi-arc racks 16 are installed on both sidewalls of the support part 17b to receive the driving force from the geared motor 19c of the frame 20. Spur gears are formed on the outer circumferential portion of the rack 16, and the rack 16 is coupled to the inner sidewall of the subframe 17 by fasteners such as bolts. The racks 16 are provided for sliding rotational movement of the subframe 17 on the frame 20, and a plurality of racks are arranged in parallel in a pair. On the outer circumferential teeth of the rack 16, the pinion 18c is provided to engage with the outer circumferential teeth. In addition, the frame 20 is provided with a geared motor 19c for driving the first and second gears 19b and 18b and the first and second gears 9b and 18b to drive the pinion 18c. do.

Although not shown in the figure, by fixing the pinion 18c with respect to the rack 16, a separate fixing means for stopping the band saw assembly 13 at a predetermined position on the frame 20 may be provided. have.

Referring to FIG. 4, the band saw assembly 13 has pulleys 13b fitted to the studs 13d installed on the subframe 17 and rotatably installed on the support 17b and the extension 17a, respectively. and; A band saw 13a which is caught and supported by the pulley 13b and is rotated while one side passes through the through-hole 11a formed in the table 11 to cut the workpiece W; A drive motor 13c for driving the pulley 13b is provided. Here, the drive motor 13c preferably has a driving force of about 2 hp.

In addition, although not shown, the cutting device of the present invention is provided on both sides of the table 11 to convey the workpiece W in the direction of the arrow (not shown), and from the band saw 13a to the workpiece W It is preferable to further provide a chip discharge means (not shown) for discharging the chips generated during cutting.

Referring to the operation of the cutting device according to the present invention configured as described above are as follows.

First, referring to FIG. 3, the workpiece W is clamped to the table 11 with a predetermined fixture (not shown). When the clamping of the workpiece W is completed on the table 11, as indicated by the dotted line, the band saw assembly 13 is rotated by the rotation means 14 to adjust the inclination angle of the table 11. Here, of course, the inclination angle adjustment between the table 11 and the band saw assembly 13 may be performed before the clamping step.

In the cutting device according to an embodiment of the present invention, the inclination angle formed by the table 11 and the band saw assembly 13 may be adjusted to a range of 27 ° to 90 °, and angles used mainly, such as 27 ° and 30 °. , 33 °, 45 °, etc., the electric setting by the drive of the geared motor (19c) is possible, the remaining angle other than the dedicated angle can be set manually by the control lever (not shown) geared motor ( It is preferable that a circuit for adjusting 19c) is configured.

Here, the process of adjusting the angle by the rotating means, which is one of the features of the present invention, is performed in sequence as follows.

First, when the geared motor 19c is rotated, the first gear 19b directly connected to the rotation axis of the geared motor 19c is rotated, and the first gear 19b is engaged with the first gear 19b. The second gear 18b is rotated. Subsequently, a plurality of pinions 18c provided at both ends of the shafter 18a are rotated by the rotation of the second gear 18b, and the pinions 18c rotate the rack 16 engaged with the pinions 18c. . Thus, the support 17b to which the rack 16 is coupled is rotated on the roller 15, thereby finally adjusting the cutting angle between the band saw 13a and the workpiece W clamped to the table 11.

After adjusting the cutting angle, the inclination angle between the band saw assembly 13 and the table 11 is adjusted, and then the band saw 13a is driven by the drive motor 13c of the band saw assembly 13. .

After the cutting process is the same as the conventional cutting device, but for explaining the invention, the workpiece (W) installed on the table 11 to the conveyor (not shown) installed on both sides of the table 11 The operator manually transfers to the direction of the arrow, that is, the band saw 13a, by a predetermined length to be used or cut. The band saw 13a cuts the workpiece W at a speed of about 2,000-3,000 fpm by the drive motor 13c controlled by the inverter. This drive motor 13c is preferably used to cut the workpiece (W) at a speed in the range of about 0-5,000 fpm.

During the cutting operation described above, the chip generated from the band saw 13a is discharged through a chute (not shown) surrounding the band saw 13a at the bottom. And the band saw 13a in which the said cutting operation is performed is cooled by the cooling oil supplied by a cooling apparatus (not shown).                     

When the cutting work of the workpiece W is completed as described above, the clamping of the workpiece W is released and taken out.

The cutting device according to the present invention has the following effects.

first; Reduce the risk of safety accidents when the operator grabs the workpiece by hand or cuts using blocking fixtures.

second; The productivity of cutting the workpiece can be increased.

The present invention has been described with reference to one embodiment shown in the accompanying drawings, which is illustrative, and those skilled in the art will understand that various modifications and equivalent embodiments are possible. . Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (6)

delete delete delete A band saw assembly having a table on which a workpiece is mounted, comprising a frame having a space portion, and a pair of half arc-shaped support portions positioned in the space portion and rotatably supported at a predetermined angle by supporting means mounted to the frame. And a rotation means for rotating and positioning the band saw assembly at a predetermined angle with respect to the frame. And said rotation means comprises a rack formed along the trajectory of the half arc-shaped support of said band saw assembly, and a pinion rotated by a drive unit provided in said frame and engaged with said rack. The method of claim 4, wherein The drive unit is a cutting device, characterized in that provided with a brake and a geared motor. The method of claim 4, wherein The band saw assembly includes a sub-frame having the half arc-shaped support, an extension extending upwardly from the support, pulleys respectively installed on the support and the extension, and a through-hole formed on the table. Band saw through which one side passes through the long hole, cutting device characterized in that it comprises a drive motor for driving the pulley of one side of the pulleys.

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