JPH0366025B2 - - 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. In view of these points, the applicant arranged a large number of cutters on a pair of rotating shafts, and the applicant arranged a large number of cutters on a pair of rotating shafts, and We have developed various chip cutting devices and conveying devices for the same, in which the cutters are meshed with each other, and the chips carried into the cutters are divided into small pieces and processed in a compact manner, and we have already filed an application 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 high accuracy and precision, and improves compact processing. It is an object of the present invention to provide a cutting device that can prevent the above-mentioned pieces to be processed from clogging and stagnation, and can further reduce the size and weight of this type of device.

(Means for Solving the Problems) Therefore, the cutting device of the present invention includes a pair of rotatable cutter shafts installed in parallel, and a substantially disc-shaped cutter with a plurality of catching grooves opened on the outer circumferential surface. , and spacers having a cylindrical circumferential surface with a smaller diameter than the cutter are installed alternately, and these cutters and spacers are arranged in mesh with the cutter and spacer on the opposite axis side, and a secondary cutter is attached to the lower circumferential surface of the cutter. In the cutting device in which the pointed ends are arranged close to each other, a fixed plate is arranged below the cutter, and plate-shaped secondary cutters having approximately the same thickness as the cutter are placed on both sides of the fixed plate in a direction perpendicular to the cutter shaft. The upper edge of the secondary cutter is provided with an upper edge that projects upwardly and a lower edge that projects laterally, spaced apart from each other, and a straight line extending from the upper edge to the lower edge between the upper and lower edges. While forming a guide surface that descends to the spacer, the upper edge is arranged on the outside of the fixing plate, the lower edge is arranged on the inside of the fixing plate, and the upper edge is arranged close to the inner lower circumferential surface of the spacer, A lower cutter is placed close to the inner lower peripheral surface of the cutter facing the spacer, and a secondary cutter is placed at the bottom of the gap formed by the spacer, the cutter facing the spacer, and the cutters located on both sides of the spacer. It is characterized by the fact that the lower part of the gap is substantially closed off by providing a barrier.

(Embodiment) Below, an illustrated embodiment in which the present invention is applied to a chip cutting device will be explained. 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 cutter 5 is held at the lower end of the support arm, which has a substantially L-shaped cross section and has a support arm fixed to its upper end.

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 alternately attached to these cutter shafts 9 and 10, and these cutters 12 and spacers 1 on different shafts
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 reducer 20 arranged close to it, and its drive shaft 21 and one cutter shaft 9 are connected via a coupling 22. There is.

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 accommodated in the notch 28, and the tip of the scraper 29 is disposed close to the outer periphery of the spacer 13.

On the other hand, a fixing plate 30 having approximately the same width as the distance between the axes of the cutter shafts 9 and 10 is fixed to the center of the lower end of the horizontal frames 6 and 6 through bolts 31 and screw holes 32. A plurality of grooves 33 are formed on the upper surface of the plate 30 directly below the spacer 13 .

The grooves 33 are arranged alternately on both sides of the fixing plate 30 as shown in the figure, and screw holes 34, 3 are provided at the bottom of the grooves 33.
4 is formed, and a secondary cutter 36 accommodated in the groove 33 is fixed via a bolt 35 screwed into the screw hole 34.

The secondary cutter 36 is composed of a substantially pentagonal plate body, and has an upper edge 37 projecting upwardly and a lower edge 38 projecting laterally formed at the upper end thereof, spaced apart from each other. In between, a guide surface 36a that descends linearly from the upper edge 37 to the lower edge 38 is formed. In this case, the secondary cutter 36 and the fixed plate 3
It is also possible to integrally configure the 0 and 0 by molding.

As shown in FIGS. 4 and 5, the secondary cutter 36 has a lower edge 38.
is positioned and attached inside the fixed plate 30,
The upper edge 37 is disposed close to the inner lower circumferential surface of the spacer 13, and the lower edge 38 is disposed close to the inner lower circumferential surface of the cutter 12 facing the spacer 13.

Therefore, the spacer 13 and the spacer 13
The space formed between the cutter 12 and the opposing cutter 12
The lower part of the cutter 39 is substantially closed by the secondary cutter 36, and during this time, the passage of chips from the cutter 39 is prevented.

(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.

Further, when attaching the secondary cutter 36, the cutter 36 is assembled in advance at a predetermined position on the fixing plate 30. That is, when assembling it, the lower edge 38 is positioned inside the fixing plate 30, the cutter 36 is housed in the groove 33, and then the bolt 35 is screwed into the screw hole 34 from below the fixing plate 30. Fix it.

Next, the fixing plate 30 with the secondary cutter 36 attached thereto is positioned between the lower parts of the vertical frames 6, 6 of the cutter 5, and the bolts 3 are inserted from the outside of the vertical frames 6, 6.
1 into the screw hole 32 to secure it.

The situation after the fixing plate 30 is installed is as shown in FIG.
2 and the spacer 13, the upper edge 37 is arranged close to the inner lower circumferential surface of the spacer 13, and the lower edge 38 is arranged close to the inner lower circumferential surface of the cutter 12 facing the spacer 13. The lower end of the gap 39 between the spacer 13 and the cutter 12 facing the spacer 13 is substantially closed by the cutter 36, and the guide surface 36a of the cutter 36 is located at the lower end position.

In this way, in the present invention, the fixing plate 30 is configured to be flat, the upper and lower edges 37 and 38 are positioned on the inner lower circumferential surface of the cutter 12 and the spacer 13, and the secondary cutter 36 and the fixing plate 30 integrated therewith are attached to the cutter. Since the cutter 5 is positioned in the 12 directions, that is, on the upper side, the height of the vertical frame 6 to which the fixing plate 30 is attached is suppressed, and the horizontal frame 7 is also made to follow this, making it possible to reduce the size and weight of the cutter 5.

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 these shafts 9 and 10 are moved together.

When chips are introduced into the cutter 5 under such circumstances, the chips move inside the cutter 12 while being scooped up by the capture groove 14 of the cutter 12, and are torn off at the occlusal position of the cutter 12. rupture.

After the breakage, the chips are removed from the cutter 12 and spacer 13.
The secondary cutter 36 is accommodated on the guide surface 36a of the secondary cutter 36, and the surface 3
6a and moves to the lower edge 38 side, and is pressed against the circumferential surface of the cutter 12 by the edge 38, and is crushed, torn off, and divided.

In this case, since the lower end of the gap 39 is substantially closed by the secondary cutter 36, the chips cut by the cutter 12 and uncut chips are prevented from passing through, and the total amount is Cut with precision.

Moreover, the guide surface 36a is formed as a linear inclined surface to facilitate the sliding of chips, and the lower edge 38
Since the guide surface 36a protrudes laterally, cutting chips are not accumulated on the guide surface 36a, and cutting is performed smoothly and efficiently.

On the other hand, upper and lower edges 37 and 38 are arranged close to each other on the inner lower circumferential surfaces of the cutter 12 and the spacer 13 to scrape off chips adhering to the circumferential surfaces to prevent a decrease in the cutting ability of the cutter 12. By forcing these chips to be accommodated on the guide surface 36a, the highly accurate cutting described above is facilitated.

(Effects of the Invention) As described above, the cutting device of the present invention includes a pair of rotatable cutter shafts installed in parallel, a substantially disc-shaped cutter with a plurality of catching grooves opened on the outer circumferential surface, and spacers having a cylindrical circumferential surface with a smaller diameter are attached alternately, these cutters and spacers are arranged in mesh with the cutter and spacer on the different axis side, and the pointed end of the secondary cutter is attached to the lower circumferential surface of the cutter. In the cutting device arranged close to each other, a fixed plate is disposed below the cutter, and plate-shaped secondary cutters having approximately the same thickness as the cutter are disposed on both sides of the fixed plate in a direction perpendicular to the cutter shaft. , an upper edge protruding upward and a lower edge protruding laterally are provided at the upper end of the secondary cutter, spaced apart from each other, and between these upper and lower edges, a straight line descends from the upper edge to the lower edge. While forming a guide surface, the upper edge is placed on the outside of the fixing plate, the lower edge is placed on the inside of the fixing plate, and the upper edge is placed close to the inner lower peripheral surface of the spacer, and the upper edge is placed opposite to the spacer. A lower cutter is arranged close to the inner lower peripheral surface of the cutter to be cut, and a secondary cutter is arranged at the bottom of the gap formed by the spacer, the cutter facing the spacer, and the cutters located on both sides of the spacer. Since the lower part of the above-mentioned gap is almost closed, this type of equipment can be made smaller and lighter, and it is possible to cut the pieces to be processed such as chips with high accuracy and precision, and to prevent the accumulation of pieces to be processed. This has the effect of preventing this and allowing smooth and efficient cutting.

[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 bottom view showing further main parts of the present invention, and FIG. The figure is a front view showing how the secondary cutter applied to the present invention is attached, and FIG. 5 is a perspective view showing an example of the secondary cutter applied to the invention. 9, 10... Cutter shaft, 12... Cutter, 13... Spacer, 14... Capture groove, 30... Fixing plate, 36... Secondary cutter, 36a... Guide surface, 37... Upper edge, 38... Lower edge, 3
9...pause.

Claims (1)

[Claims] 1. A pair of rotatable cutter shafts installed in parallel are alternately fitted with substantially disc-shaped cutters having a plurality of capture grooves on their outer peripheral surfaces and spacers having a cylindrical peripheral surface with a smaller diameter than the cutters. In a cutting device in which these cutters and spacers are arranged in mesh with the cutter and spacer on the opposite axis side, and the pointed end of the secondary cutter is placed close to the lower peripheral surface of the cutter, a fixing plate is installed below the cutter. plate-shaped secondary cutters having approximately the same thickness as the cutter are disposed on both sides of the fixed plate in a direction orthogonal to the cutter shaft, and protrude upward from the upper end of the secondary cutter. An upper edge and a lower edge protruding laterally are provided apart from each other, and a guide surface that descends linearly from the upper edge to the lower edge is formed between these upper and lower edges, while the upper edge is placed outside the fixing plate. , the lower edge is placed inside the fixing plate, and the upper edge is placed close to the inner lower peripheral surface of the spacer,
A lower edge is arranged close to the inner lower peripheral surface of the cutter facing the spacer, and a secondary cutter is placed at the bottom of the gap formed by the spacer, the cutter facing the spacer, and the cutters located on both sides of the spacer. A cutting device characterized in that the lower part of the gap is substantially closed by arranging the cutter.