JPH0366024B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cutting device that cuts chips and the like discharged from, for example, a machine tool into small pieces and processes them in a compact manner.

(Prior art) Chips discharged from machine tools such as lathes are generally scattered around the machine, worsening the working environment, impairing work safety, and making it difficult for workers to regularly clean the machine. As a result, there have been problems such as a decrease in work efficiency, and improvements have been desired for some time.

In view of these points, the applicant arranges a large number of cutters around a pair of rotating shafts, meshes these cutters with each other, and divides the chips carried into the cutters into small pieces for compact processing. We have developed various chip cutting devices and their conveyance devices, and have already filed applications for these.

(Problems to be Solved by the Invention) The present invention further improves the cutting device for which the application has already been filed, cuts pieces to be processed such as chips with higher accuracy and precision, and improves compact processing. The purpose of the present invention is to provide a cutting device that has the following characteristics.

(Means for Solving the Problems) For this reason, the cutting device of the present invention has a plurality of cutters attached to a pair of rotatable cutter shafts installed in parallel, and a cutting method in which these cutters are arranged in an alternating meshing arrangement. In the device, the cutter is formed into a substantially disk shape, and a plurality of trapping grooves are opened on the outer peripheral surface of the cutter, and a groove is provided directly above the cutters mounted coaxially.
It is characterized in that a cutting edge portion of a rod-shaped primary cutter with one end fixed is provided, and the cutting edge portion is placed close to the outer circumferential surface of the opposite cutter on the side of a different axis.

(Embodiment) Below, an illustrated embodiment in which the present invention is applied to a chip cutting device will be described. In FIGS. 1 to 5, 1 is a conveyor case installed close to a machine tool (not shown). A discharge end of a scrap conveyor 2 for conveying chips discharged from a machine tool is accommodated therein, and a discharge port 3 is opened below the scrap conveyor 2.

4, 4 are both side walls 1a, 1a of the conveyor case 1
The support arm has an approximately L-shaped cross section and has an upper end fixed to the support arm, and a cutter 5 is held at the lower end of the support arm.

As shown in FIGS. 2 and 3, the cutter 5 is
It has a machine frame 8 in which a pair of vertical frames 6, 6 and a horizontal frame 7, 7 are assembled in a rectangular shape so as to face each other, and a pair of cutter shafts 9, 10 formed of splines, for example, are attached to the frame 8. , are rotatably supported via bearings 11,11.

A plurality of cutters 12 and spacers 13 are attached alternately to these cutter shafts 9 and 10, and these cutters 12 and spacers 1 on the growing shaft side
3 and are interposed alternately in a meshing arrangement as shown in the figure.

Among these, the cutter 12 is formed into a substantially disk shape, and has a plurality of substantially semicircular capturing grooves 14 opened in its outer circumferential portion, and the spacer 13 is formed in the cutter 12.
It has approximately the same thickness as the cutter 12, and has a circumferential surface with a smaller diameter than the cutter 12.

Gears 15 and 16 are fixed to the shaft ends of the cutter shafts 9 and 10, and are in mesh with each other, allowing the cutter shafts 9 and 10 to rotate at the same speed in opposite directions. Reference numeral 17 denotes a dish-shaped chute facing directly below the outlet 3, which is connected to the vertical frame 6,
6 is attached via support pieces 18, 18 fixed to the sides thereof, and 19 is a motor with a speed reducer 20 disposed close to it, and its drive shaft 21 and one cutter shaft 9 are connected via a coupling 22. ing.

In the figure, 23 is a chip storage box positioned below the cutter 5, 24 is a motor installed on the discharge end side of the scrap conveyor 2, 25 is a chain case, and 26
is switch box, 27,27 is cutter 12
It is a guide member disposed close to the group, and its upper surface is formed into a slope inclined toward the cutter 12 direction, and a plurality of notches 28 and scraper parts 29 are formed at the tip of the guide member, so that it has a substantially comb-like configuration. There is.

The outer periphery of the cutter 12 is inserted into the notch 28, and the approximately claw-shaped scraper portion 2
9 is arranged close to the outer peripheral surface of the spacer 13.

On the other hand, base end portions of a plurality of primary cutters 30 are fixed to the upper end portions of the horizontal frames 7, 7, and the cutting edge portions of the primary cutters 30 are disposed on the spacer 13.

The primary cutter 30 is formed into a substantially bite shape as shown in FIGS. 4 and 5,
At the tip of the shank portion 31 bent into a substantially F-shape,
A cutting edge portion 32 is provided. Further, a substantially arc-shaped recess 33 is formed on the lower surface of the tip side of the shank portion 31, and the recess 33 is positioned directly above the upper circumferential surface of the spacer 13, and the cutting edge portion 32 is placed on the circumferential surface of the opposing cutter 12. They are placed close together.

A recessed hole 34 is formed at the rear end of the shank part 31, and a recessed groove 36 is formed at the upper end of the horizontal frame 7, and the rear end of the shank part 31 is accommodated in the groove 36. In addition, a bolt 35 is inserted into the recessed hole 34, and a screw hole 37 is formed at the bottom of the recessed groove 36.
The primary cutter 30 is attached by screwing it into.

(Function) When installing a cutting device configured in this way,
The upper edge of the chute 17 is positioned at the mouth edge of the outlet 3 of the conveyor case 1, the upper ends of the support arms 4, 4 are fixed to the side surface of the conveyor case 1, and the lower ends are attached to the machine frame 8 that constitutes the cutter 5. For example, it may be fixed to the lower end surface of the.

In this case, when assembling the cutter 5, use the same number of primary cutters 3 as the spacers 13.
0, one end of which is accommodated in the groove 36 formed at the upper end of the horizontal frame 7, a bolt 35 is inserted into the groove 34 of the cutter 30, and the bolt 35 is inserted into the screw hole 37. Screw it in to fix the cutter 30 in a cantilevered manner.

In this situation, as shown in FIG. 4, the other end of the primary cutter 30 is positioned directly above the upper circumferential surface of the spacer 13, and its cutting edge 32 is close to the upper circumferential surface of the cutter 12 facing the spacer 13. will be placed.

When using the cutting device installed in this way,
The motor 19 is driven to rotate one cutter shaft 9 linked to the drive shaft 21, and the gear 15 fixed to the end of the shaft 9 is connected to the gear 15.
The cutter shaft 10 is rotated at the same speed in the opposite direction to the shaft 9 through a gear 16 meshing with the shaft 9, and a large number of cutters 12 and spacers 13 attached to the shafts 9 and 10 are moved together.

When chips are fed into the cutter 5 under such circumstances, the chips move to the inside of the cutter 12 through the capture groove 14 of the cutter 12, and in the process, the cutting chips of the primary cutter 30 are Scooped up by 32,
Being handled at the same time makes them nervous and breaks down.

The chips after the breakage pass through between the lower surface of the cutting edge portion 32 and the circumferential surface of the cutter 12, move to the gap 38 side, are finely broken by the cutter 12 at that part, and are placed in the chip storage box. It is housed in 23.

In this way, in the present invention, the chips are first cut with the primary cutter 30 and then cut with the cutter 12, so the chips are cut twice, which results in finer division and higher accuracy. You can aim for

Moreover, the cutting edge portion 3 of the primary cutter 30
2 closes the upper part of the gap 38 and prevents uncut chips from passing through, thereby enhancing the above-mentioned action, and also by the scraper action of the cutting edge part 32,
Prevents chips from adhering to the circumferential surface of the cutter 12,
Prevents chip clogging.

(Effects of the Invention) As described above, the cutting device of the present invention is a cutting device in which a plurality of cutters are attached to a pair of rotatable cutter shafts installed in parallel, and these cutters are arranged in mesh with each other alternately. The above-mentioned cutter is formed into a substantially disk shape, and a plurality of capture grooves are opened on its outer peripheral surface, while the cutting edge of a rod-shaped primary cutter with one end fixed is arranged directly above the coaxially mounted cutters. In addition, since the cutting edge portion is arranged close to the outer circumferential surface of the opposite cutter on the opposite axis side, the workpiece such as chips is cut by the primary cutter prior to cutting by the cutter attached to the cutter shaft. In addition to the subsequent cutting with a cutter, the work piece can be cut with high accuracy and precision, and the cutting can be made finer.

[Brief explanation of drawings]

FIG. 1 is an external view showing an example of the usage state of the present invention, FIG. 2 is a sectional view showing an enlarged main part of the present invention, FIG. 3 is a plan view showing further main parts of the present invention, and FIG. FIG. 5 is a front view showing how the primary cutter applied to the present invention is attached, and FIG. 5 is a perspective view showing an example of the primary cutter applied to the present invention. 9, 10... Cutter shaft, 12... Cutter, 14... Capture groove, 30... Primary cutter, 32... Cutting edge portion.

Claims (1)

[Claims] 1. In a cutting device in which a plurality of cutters are attached to a pair of rotatable cutter shafts installed in parallel, and these cutters are arranged in an alternating meshing arrangement, the cutters are formed into a substantially disk shape, and the outer circumferential surface thereof is While opening a plurality of capture grooves, the cutting edge of a rod-shaped primary cutter with one end fixed is placed directly above the coaxial cutters, and the outer periphery of a cutter on a different axis that faces the cutting edge. A cutting device characterized by being placed close to a surface.