JPH06277921A - Hole saw device to automatically remove chip disc - Google Patents

Abstract

PURPOSE:To automatically remove a chip disc remaining inside a hole saw after boring a hole by the hole saw. CONSTITUTION:A hole saw shaft 1 to which a drill 6 and a hole saw 5 are fixed is provided with an external thread, and a gear 2 on which an internal thread is machined is fitted onto the external thread. The hole saw shaft 1 is rotated, and the rotation of the gear 2 is restrained to make the tip of a decending protrusive bar 4 automatically remove a chip disc C remaining inside the hole saw outward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hole saw device, and more particularly to a hole saw device which automatically removes disc-shaped chips.

[0002]

2. Description of the Related Art Conventionally, a cutting tool such as a drill or a hole saw has been used to make a hole in an iron plate, a pipe, a square pipe, an L-shaped steel, an H-shaped steel, other steel plates or a non-ferrous metal plate.
Drills are used to make small holes, and holesaws are used to make relatively large holes. This is because when a large-diameter drill is used instead of a hole saw, it is expensive, a large thrust force is required for processing, and the metal plate of the other party may be deformed. In the case of a drill, the chips are fine and they escape to others, so it is not a problem so much, but after drilling with a holso, many chips are left inside the holso in the form of a disc and remain. Therefore, it is very troublesome for the operator to remove it, for example, a worker hits a hole saw with a tool or prides off a chip disk, which is troublesome. In addition, the hole saw or the drill may be scratched, which may hinder the subsequent cutting. For this reason, a push spring is placed inside the hole saw, and the push force is used to eliminate it.However, if disc-shaped chips are caught inside the hole saw, the amount of spring force will vary. It is not something that can be taken out softly. In addition, if the sheets are taken out one by one, the efficiency does not increase. Therefore, there is generally a method of storing as many sheets as the Holso internal space allows and discharging them all at once. On the other hand, in recent years, unmanned fully automated operation has been performed by using a robot by a machining center, etc. day and night, but an attempt has been made to incorporate the drilling work by a hole saw in the series of steps, but Since it is difficult to remove and remove the disc-shaped chips that remain inside the forsaw after the drilling work, its practical application is not sufficient. It is impossible to realize a series of full automation.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a holsaw device that automatically removes disc-shaped chips remaining inside the holsaw. And

[0004]

DISCLOSURE OF THE INVENTION However, the inventor of the present invention did not incline and offset the chip disk inside the hose by using a protruding rod having three or more tips aligned with each other and a screw of a central hoso shaft. The inventors have completed the present invention by finding that they can be eliminated by pushing them out strongly and evenly. That is, the present invention is
A horusaw shaft provided with a holsaw and a drill, an up-and-down moving body screwed to the holsaw shaft, a projecting member provided with a projecting rod that goes up and down through a holsaw hole, and rotatably attached to the up-and-down moving body; and the up-and-down moving body. This is a hole saw device that fits together and automatically removes a chip disk consisting of a guide member that allows vertical movement of the vertical moving body but does not allow rotational movement. Further, it is also a hole saw device in which the outer periphery of the vertical moving body is a square nut and which automatically removes the chip disc. Furthermore,
It is also a hole saw device in which the outer circumference of the vertical moving body is a gear and which automatically removes the chip disk.

[0005]

Function: The metal plate is perforated by rotating the hole saw shaft. After the boring process, the hole saw shaft is moved by the guide member, and the vertical moving body is gently fitted or meshed with the guide member. Rotate the holso shaft. The up-and-down moving body that is screwed onto the holsaw shaft moves downward as the holsaw shaft rotates. At this time, with the movement of the up-and-down moving body, three or more projecting rods having the same tip end enter through the hole of the hole saw into the hole saw, and without tilting the chip disk remaining and remaining inside the hole saw, The female screw of the gear that fits the male screw of the shaft is pushed down by the strong screw force. After that, the holsaw shaft rotates again (in the reverse of the beginning), and the up-and-down moving body moves upwards and returns, with which the projecting rod retracts into the position of the hole at the bottom of the holsaw. Return the hole saw shaft to the original position and move to the next drilling operation again.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows a state before the chip disc is ejected and eliminated in the hole saw device. The chuck A is a chuck A which is a main shaft of a machining center and is attached by ATC to the main shaft. A forksaw 1 is mounted on the chuck A. A forksaw 5 and a drill 6 are fixed to the tip of the forksaw. At the bottom of the hole saw, there remains a chip disk C after the cutting process has been completed. A female screw is provided on the gear 2 which is the up-and-down moving body D, and a male screw is arranged on the forsaw shaft 1. The forsaw shaft 1 and the gear 2 are screwed to each other at their screw portions. A protruding member 3 is rotatably provided below the gear 2 and will be described in detail in the description of FIG. Three or more protruding rods 4 are evenly divided on the projecting member 3 so as to project to make the tip size uniform without tilting and projecting the chip disk C. The projecting rod 4 has a cylindrical shape. The tip end of the hole is inserted into the hole 11 of the bottom portion 5b of the hollow saw 5, and the position is set. With this protruding rod, the chip disc C remaining in the hole saw is ejected and eliminated. On the other hand, a gear receiver 7 serving as a guide member E is arranged at a position adjacent to the hosel shaft 1. The gear receiver 7 is fixed to a stand 8 standing on the table B via a key 14 and a washer 10 by a fixing nut 9 or the like. The meshing of the gear 2 and the gear receiver 7 prevents the gear from rotating. Since the gear moves up and down a certain distance in order to project the chip disk C, the thickness of the gear receiver 7 must be sufficient to cover the up and down moving distance of the gear 2 at least. FIG. 2 shows a state after the chip disk C has been pushed down. From the state shown in FIG. 1, the hollow saw shaft 1 is rotated to move the gear 2 downward, so that the chip disk C is projected and removed. The gear 2 is located in the lower part of the gear receiver 7 in the thickness direction, but at this time, the chip disk C is completely detached from the hole saw 5 and falls down. FIG. 3 is a schematic view showing a connected state of the gear 2 and the protruding member 3. The gear 2 and the projecting member 3 are fitted to each other via a thrust bearing 13, and the fitting is made of two halves.
Are joined by the butted portion 12. Therefore, the gear 2 does not rotate even if the protruding member 3 rotates. On the other hand, when the hole saw shaft 1 rotates, the hole saw 5 and the drill 6 which are fixed to it rotate at the same time. When the hole saw rotates, the protruding rod 4 is inserted into the hole 11 of the hole saw, so the protruding member 3 also rotates, The gear 2 does not rotate. Next, a series of steps for removing the chip disk from the hole saw will be described. When the hole saw shaft is rotated and the cutting work of the metal plate or the like is completed by the hole saw, the hole saw shaft 1 is moved to the gear receiver 7 arranged adjacently. Next, the gear 2 approaches the gear receiver 7 by the rapid movement of the table B at a rapid forward speed, slows down the last several grits, and meshes slowly without any impact. here,
Since the gear 2 and the hole saw shaft 1 are screwed together and the projecting member 3 and the gear 2 are rotatable when the hole saw shaft is rotated, the gear 2 moves downward along the tooth groove of the gear receiver 7. Move (it does not change in the case of spindle head movement described later). At the same time, the tip of the protruding rod 4 located in the hole 11 in the bottom portion 5b of the hole saw 5 enters the inside of the hole saw from the standby position in the hole 11 of the hole saw, and the chip disk C remaining and remaining on the inner wall surface 5a is removed. Push down from the top. In this case, since the protruding distance of the protruding rod 4, that is, the vertical moving distance varies depending on the material of the chip disk C and the diameter of the hole saw, the length may be set to match it. Furthermore, in order to regulate the vertical movement distance of the protruding rod, the spindle head of the machining center is started and stopped by numerical control at the same time, the spindle is rotated and stopped simultaneously, and the upper and lower limits of the protruding rod are numerically controlled by the spindle head. If it is regulated by, an accurate vertical movement distance can be realized. At this time, if the projecting rod descends, the spindle head rises and the gear meshing position does not change. When raising the projecting rod, the spindle head may descend. Automatic control of starting and stopping can be performed. The above regulation uses an optional signal, and the chip disk C that has been pushed off the hall saw is thrown into the chip receiving box P placed on the table B. Next, when the holso shaft is rotated in the opposite direction to the previous one, it returns to the original position.
At this time, the tip of the projecting rod 4 has a hole 11 in the bottom portion 5b of the hole saw.
Return to the position of the lower surface of and wait while still fitted in the hole. Eliminating the chip discs C one by one reduces the efficiency,
As long as the space inside the hole saw 5 allows, it is efficient to process and store multiple sheets and then eliminate them all at once. The hole saw shaft 1 is separated from the gear receiver 7, and the next new cutting process is performed at another place. FIG. 4 shows a second embodiment. A square nut 22 which is an up-and-down moving body is screwed to the hole saw shaft 21, and the square nut is a guide member.
Can be fitted to the receiving portion 33. It is more convenient to use a hexagonal nut for the square nut 22 when holding a spanner or a monkey wrench by hand and turning it by hand, but any other number of angles may be used for automation. The square nut receiver 30 is arranged on the table B with its foot fixed by bolts 31, nuts 32, and the like. The protruding member 23 is pressed against the square nut 22 by a pressing spring 28 interposed between the hole saw and the protruding member, and is in contact with the thrust nut 35 via a thrust bearing 35.
An oil-impregnated metal disc may be used as the thrust bearing because the thrust ball bearing is thick. Therefore, after the cutting work is completed, the square nut receiver 3 is moved by the movement of the hole saw shaft.
The square nut 22 fitted in 0 does not rotate together with the rotation of the holso shaft 21, but can move downward. The mode in which the chip disk is removed by the protruding rod 24 is the same as in the first embodiment described above. FIG. 5 shows a top view of the square nut. FIG. 6 shows an overall view of the square nut receiver. The square nut of FIG. 5 fits in the receiving portion 33 and moves up and down at a low speed. Although the embodiments of the present invention have been described above, it goes without saying that various other modifications are possible without departing from the essence of the present invention. For example, the vertical moving body and the guide member are not limited to the square nut and the square nut receiver, the gear and the gear receiver, etc., and the vertical moving body is not allowed to rotate but is allowed to move in the vertical direction by fitting the two together. Anything is fine. Further, the vertical moving member and the projecting member may be coupled by any method as long as the two can rotate with respect to each other.

【The invention's effect】

1. No need to manually remove the chip disc. 2. Day and night operation is possible by incorporating it into a series of fully automated processes such as machining centers. 3. The chip disc can be eliminated without damaging the hole saw or drill. 4. When using the hole saw of the present invention in a conventional drilling machine or a hand-held electric drill, if a spanner or monkey wrench is manually fitted into the square nut and rotated, it is faster and easier than the conventional hole saw. The ability to eliminate the chip disc,
Do not damage the drill or hole saw.

[Brief description of drawings]

FIG. 1 is a state before a chip disk is ejected and removed.

FIG. 2 shows a state after the chip disk is pushed down.

FIG. 3 is a schematic view showing a connected state of a gear and a protruding member.

FIG. 4 is a second embodiment.

FIG. 5 is a top view of a square nut.

FIG. 6 is an overall view of a square nut receiver.

[Explanation of symbols]

 A, Chuck B, Table C, Chip disk D, Vertical moving body E, Guide member T, Gear receiver thickness P, Chip receiving box 1, Hole saw shaft 2, Gear 3, Projecting member 4, Projecting rod 5, Holsaw 5a , Inner wall surface 5b, bottom portion 6, drill 7, gear receiver (E) 8, stand 9, fixing nut 10, washer 11, hole 12, butting portion 13, thrust bearing 14, key 21, hole saw shaft 22, square nut 23, Projecting member 24, projecting rod 25, hole saw 26, drill 30, square nut receiver 31, bolt 32, nut 33, receiving part 34, inclined part 35, oil-impregnated metal disc.

Claims (3)

[Claims] 1. A vertically movable body D provided with a vertically movable body D provided with a hollow saw 5 and a drill 6, a vertically movable body D screwed to the vertically movable body 1, and a protruding rod 4 which vertically moves through a hollow hole 11. A hole saw device which automatically removes a chip disk C formed by a protruding member 3 that is movably attached and a guide member E that fits with the vertical moving body and that allows the vertical moving body to move up and down but does not rotate. . 2. The hole saw device for automatically removing the chip disk C according to claim 1, wherein the vertical moving body D is a square nut 22. 3. The hole saw device for automatically removing the chip disc C according to claim 1, wherein the vertical moving body D is a gear 2.