JP2000233309A - Drill correction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drill correction device capable of securely sucking chips into a dust collector during drilling and always drilling at a position as near as possible to a projected part of a rotating work piece with projected and recessed parts. SOLUTION: A specific area near a tip of a drill 1 is covered, a root of the drill 1 is mutually connected to a dust collector via a dust collecting box 5, a dust collecting port 7 with a diagonal notch 7b formed in a tip of the port 7 is supported so as to rotate with respect to the dust collecting box 5, and a drive mechanism 8 to rotate the dust collecting port 7 so that the notch 7b can turn in a preset direction according to a drilled position. Therefore, projected parts WPa and WPb of a rotating work piece W to be compensated can be drilled with the notch 7b opposing to the projected parts WPa and WPb and mutual interference of the dust collecting port 7 and the projected parts WPa or WPb can be restrained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drill correcting device for balancing a rotating body by performing drilling on the rotating body based on unbalance information of the rotating body obtained by a balancing test.

[0002]

2. Description of the Related Art In a drill correction device attached to or attached to a balance testing machine, generally, an unbalance of a rotating body based on an unbalance detection signal obtained by rotating a test rotating body by the balancing test machine is used. According to the information on the amount and direction, the rotator is automatically balanced at a required position on the rotator so as to balance the rotator.

[0003] In such a drill correcting apparatus, since accurate correction cannot be performed if chips generated at the time of drilling are attached to the drill or its periphery, conventionally, as shown in a schematic sectional view in FIG. A dust collecting box 42 is provided at an intermediate portion of the drill 41, and the dust collecting box 42 communicates with a dust collector via a dust collecting pipe 43. The dust collecting box 42 covers a predetermined region of the tip of the drill 41. ,
In addition, a cylindrical dust collecting port 44 having both open ends is fixed, and the tip of the dust collecting port 44 is drilled in a state of being in contact with the surface to be drilled by the drill 41 to collect chips accompanying the drilling. A method of sucking into a dust collector via a dust port 44 to a dust collection box 42 to a dust collection pipe 43 has been put to practical use. The dust collecting port 44 used in such a dust collecting mechanism is provided with a cutout portion 441 formed by cutting a lower end portion of the dust collecting port obliquely, thereby sucking chips into the dust collecting port 44 reliably and with high efficiency. It is known that it is possible.

[0004]

By the way, in the above-described drill correcting apparatus, the drilling position with respect to the rotating body as the workpiece changes according to the balance test result. When a rotating body having a step portion is corrected by adopting a dust collecting mechanism having the dust port 44, a distance that can be approached to the step portion varies depending on the direction of the notch 441 of the dust collecting port 44. Come.

That is, for example, as shown in FIG.
Based on the dynamic balance test result of the rotating shaft W having the small diameter portions WSa and WSb at both ends of the large diameter portion WL, the small diameter portions W at both ends of the shaft W are obtained.
When it is necessary to make holes for correction near Sa and WSb in Sa and WSb, respectively, as shown in the figure, the left step WP in which the notch 441 of the dust collection port 44 is opposed as shown.
The drill 41 can be made quite close to a,
There is a problem that the drill 41 cannot approach the right step WPb by the amount of interference of the dust collection port 44.
Such a problem occurs, for example, when a hole for correction is made on one surface (end face) of a disk-shaped rotating body, or when an irregular projection exists on the surface to be drilled of the rotating body. Occurs.

[0006] The present invention has been made in view of such circumstances, and it is possible to surely suck chips at the time of drilling. It is an object of the present invention to provide a drill correction device which can always perform drilling at a position as close as possible.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, a drill correcting apparatus according to the present invention uses a result of a balance test to correct the unbalance of a test rotating body determined by a balance test. In a drill correction device that automatically performs a boring process on the rotating body based on a position and a depth determined based on the drill, the periphery of the drill is covered in a predetermined region near the tip of the drill, and the base end is While communicating with the dust collector via the dust collection box, the end portion has a substantially cylindrical dust collection port formed with a notch cut obliquely in a predetermined direction, this dust collection port, the The dust collecting box is supported so as to be rotatable around the central axis, and the notch is oriented in a direction set in advance according to the position of drilling in the test rotating body. Drive mechanism to rotate dust port It characterized by that it comprises.

According to the present invention, a cylindrical dust collecting port provided with an oblique notch at the tip covers a drill and reliably and efficiently guides chips to a dust collector. By automatically changing the direction according to the drilling position, even if there is a step on the surface to be drilled, it is possible to perform drilling as close to the step as possible. is there.

That is, since the position of the step portion of the rotating body to be tested is known, the notch portion of the dust collection port is formed based on the relationship between the drilling position obtained by the balance test and the position of the step portion. The drilling hole is automatically rotated by the drive mechanism so as to always face the step (the part protruding from the surface to be drilled), and the punching position is set as much as possible by drilling. Can be approached.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a drill correcting device to which the present invention is applied, and FIG. 2 is an enlarged sectional view of a main part thereof.

The drill 1 is mounted on a spindle 1c rotatably supported by a drill head 1a. The drill head 1a moves up and down by driving a cutting device (not shown). This drill head 1a has a plate 2
The feed plate 3 is supported on the plate 2 via a pair of guides 3a and 3b so as to be vertically slidable. The feed plate 3 is provided with a drill head 1 driven by the above-described cutting device.
It moves up and down with the up and down movement of a. A drill bush 1b is fixed to the feed plate 3, and the drill 1 penetrates the feed plate 3 through the drill bush 1b, and also penetrates a dust collecting box 5 and a dust collecting port 7, which will be described later. The tip is opposed to the rotating body W which is a workpiece disposed below the rotating body W. Therefore, by driving the above-mentioned cutting device to lower the drill head 1a,
The rotating body W can be perforated by the drill 1. The descending amount of the plate 2 with respect to the feed plate 3 is detected by a differential transformer 4 attached to the plate 2 and abutting against a contact member 4a provided on the feed plate 3 side. The drilling depth of the rotating body W by the drill 1 is measured.

The feed plate 3, including the plate 2 and the drill head 1a, is entirely moved up and down by a vertical movement mechanism (not shown) at the time of loading / unloading the rotating body W as a workpiece. ing. Further, in this embodiment, the rotating body W which is a workpiece is the same as that shown in FIG.
In the same manner as described above, the stepped shaft has small-diameter portions WSa and WSb formed at both ends of the large-diameter portion WL via step portions WPa and WPb, respectively, and the small-diameter portions WSa and W at both ends thereof.
In each of Sb, a correction hole is formed in the vicinity of the step portions WPa, WPb, and at the time of drilling in each of the small diameter portions WSa, WSb, the support plate 3 is driven by a lateral moving mechanism (not shown). 1 or in FIG. 2.

A dust collection box 5 is fixed to the lower surface of the feed rate 3, and this dust collection box 5 communicates with a suction port of a dust collector (not shown) via a dust collection pipe 5a. An air nozzle 5c for ejecting high-pressure air toward the dust collector side is provided at a bent portion 5b of the dust collection pipe 5a connecting the dust collection box 5 and the dust collector.

At the lower end of the dust collection box 5, a hollow rotary shaft 6 is supported via a bearing 6a so as to be rotatable around a vertical axis. A dust collection port 7 and a driven gear 8c of a driving mechanism 8 described later are fixed to the rotating shaft 6. The dust collection port 7 is a cylindrical body having both ends opened, a flange 7a for fixing to the rotating shaft 6 is formed at a base end thereof, and a diagonally cut end is formed at a tip end thereof. A notch 7b is formed.
The dust collection port 7 has a center axis of the rotating shaft 6.
The drill 1 is fixed to the rotary shaft 6 so as to be coaxial with the axis of rotation, and is positioned coaxially with the central axis of the drill 1.

The rotary shaft 6 rotatably supported on the dust collection box 5 is rotated by a drive mechanism 8. In this example, the drive mechanism 8 includes a rotary actuator 8a and a drive gear 8b fixed to an output shaft thereof.
And the driving gear 8b and the rotating shaft 6
The rotary gear 8c is driven by the rotary actuator 8a to rotate the rotary shaft 6 and thus the dust collection port 7 in the forward and reverse directions within a range of 180 °. The drive command to the rotary actuator 8a is issued in conjunction with the drive of the lateral movement mechanism of the feed plate 3 described above.
As will be described later, the directions of the rotations are opposite to each other when the feed plate 3 moves left and right.

Next, the operation of the above embodiment of the present invention will be described. By rotating the rotating body W on the balance tester, the direction and amount of unbalance at both ends are obtained, and based on the results, the small-diameter portions WSa and WSb at both ends of the rotating body W are respectively determined. The circumferential position and depth of the correction hole to be drilled are determined. Based on the determination result, the drill corrector performs, for example, drilling on the small diameter portion WSa on the left side in FIG. 2, moving the feed plate 3 rightward and drilling on the right succession portion WSb on the right side. The feed plate 3 moves to the left to prepare for the correction of the rotating body W. Drilling at each position is performed by lowering the plate 2 with respect to the feed plate 3 with the tip of the dust collection port 7 abutting on the surface of the rotating body W, and chips generated by the drilling are formed. Is reliably and efficiently sucked into the dust collector via the dust collecting box 5 and the dust collecting pipe 5a through the dust collecting port 7 having the notch 7b formed at the tip. In addition, the chips generated by the perforation due to the injection of the high-pressure air from the air nozzle 5c provided at the bent portion 5b of the dust collecting pipe 5a have a rotating body W made of steel and have a spiral chip shape. Even if it does, it is surely sucked into the dust collector without clogging in the duct 5a.

In this drilling operation, when drilling the small diameter portion WSa on the left side, that is, when the feed plate 3 moves to the left to perform the drilling, as shown in FIG. The drive mechanism 8 is arranged so that the notch 7b faces right in the figure.
Is given a drive command. Next, the right small-diameter portion W
When the feed plate 3 is moved to the right to perform the perforation in order to perform perforation on Sb, the notch 7b of the dust collection port 7 is located on the left side in the figure as shown in the sectional view of the main part in FIG. A drive command is given to the drive mechanism 8 so as to face the drive direction.

As described above, the notch 7b of the dust collection port 7 always has the stepped portion WPa in accordance with the drilling position of the drill 1.
Or as a result of being automatically turned to face the WPb side,
When drilling the left and right small diameter portions WSa and WSb, as shown in FIG. 2 or FIG. 3, even if the axial drilling position is set closer to the stepped portion WSa or WSb, the notch portion is formed. 72, the dust collecting port 7 is set to the stepped portion W.
It does not interfere with Pa or WPb.

In the above embodiment, the dust collecting port 7 is rotated forward and backward within a range of 180 ° by using the rotary actuator 8a as an actuator of the drive mechanism 8 for rotating the dust collecting port 7. Although the example described above has been described, the present invention is not limited to this, and can be configured so that the dust collection port 7 can be rotated at an arbitrary angle and in an arbitrary direction using a motor as an actuator. Thus, a drill correction device effective for a rotating body having various irregularities on the surface to be drilled can be obtained. That is, for example, when a correction hole is formed on the surface (end face) of a disk-shaped rotating body, generally, a predetermined angle is formed in the circumferential direction and two holes are punched out of a plurality of preset holes. The imbalance correction in an arbitrary angle direction is performed by performing the process described above. However, when there are various convex portions on the surface to be pierced, the interference between the dust collection port 7 and the convex portion causes the setting of the piercing portion. Although there is a restriction, if the dust collection port 7 can be rotated in an arbitrary direction, the dust collection port 7 can be rotated so that the cutout portion 7b always faces the convex side. In addition, it is possible to set the perforated portion as close as possible, and the degree of freedom in setting the perforated portion increases.

[0020]

As described above, according to the present invention, chips generated by drilling are formed by using a dust collecting port which covers a drill and has a notch formed by diagonally cutting the tip. Can be reliably and efficiently sucked into the dust collector via the dust collection box, and the dust collection port is rotatable with respect to the dust collection box. Drilling can be performed in a state where the notch always faces the protruding part side such as the step of the rotating body by rotating the rotating body, so that it is compared with the conventional drill correction device provided with a dust collection port. Thus, the drilling position can be made as close as possible to the step and the like, and the degree of freedom in setting the drilling location can be increased.

[Brief description of the drawings]

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

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

FIG. 3 is an essential part cross-sectional view for explaining operation of the exemplary embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a conventional drill correction device provided with a dust collection mechanism that covers the periphery of a drill with a dust collection port communicating with a dust collector.

FIG. 5 is an explanatory diagram of an example of a stepped shaft drilled by a drill correction device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drill 1a Drill head 1b Drill bush 1c Spindle 2 Plate 3 Feed plate 4 Differential transformer 5 Dust collecting box 5a Dust collecting pipe 5b Bending part 5c Air nozzle 6 Rotary shaft 7 Dust collecting port 7a Flange part 7b Notch part 8 Drive mechanism 8a Rotary actuator 8b Drive gear 8c Follower gear W Rotating body (workpiece) WL Large diameter section WSa, WSb Small diameter section WPa, WPb Step section

Claims (1)

[Claims] In order to correct the unbalance of a rotating body under test determined by a balancing test, the rotating body is automatically pierced at a position and a depth determined based on the balancing test result. In a drill correction device for performing processing, the drill covers the periphery of the drill in a predetermined region near the tip of the drill, and a base end of the drill communicates with a dust collector via a dust collection box, and a tip of the drill is inclined in a predetermined direction. A substantially cylindrical dust collecting port having a cutout formed therein, the dust collecting port being rotatably supported on the dust collecting box around its central axis. And a drive mechanism for rotating the dust collection port so that the cutout portion is oriented in a direction set in advance according to the position of the hole to be drilled in the test rotating body. .