JPH10307071A - Drill modifying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To modify the unbalance of a work without error by accurately finding the reference position of machining at the time of machining both surfaces of a work on a dynamic balance testing machine. SOLUTION: While a work W is retained between upper and lower retaining members 1A and 1B so that the work W may come into contact with a datum plane 1b, the surfaces A and B of the work W are machined with first and second drills 3 and 5. In this case, the pusher of a pusher device provided in parallel with the second drill 5 is brought into contact with the surface B of the work W which is not in contact with the datum plane 1b and the moving amount of the pusher is found by means of a displacement gauge. Then the moving amount of the second drill 5 for machining the surface B is found based on the measured result of the displacement gauge and the unbalance of the work W and the work W is machined based on the moving amount of the drill 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic balance testing machine, and more particularly, to a drill correcting machine for correcting an unbalanced amount of a workpiece by drilling a workpiece.

[0002]

2. Description of the Related Art The configuration of a conventional drill correcting machine is shown in FIG. As shown in FIG. 11, the drill corrector 60 is provided adjacent to a dynamic balance tester (not shown), and holds a workpiece W from which the unbalance amount is detected by the dynamic balance tester from above and below. Upper and lower holding members 61A and 61B, a drill device 62 for drilling a work W by a drill, and a plane perpendicular to the rotation axis direction (Z direction) and the rotation axis of the work W held by the upper and lower holding members 61A and 61B. The processing of the work W by controlling the moving device 63 that moves the drill device 62 in the above two directions (XY directions) and the moving device 63 according to the unbalance amount of the work W measured by the dynamic balance tester. And a control device 64 for adjusting the amount.

[0003] The work W in which the unbalance amount is detected by the dynamic balance tester is attached to the upper and lower holding members 6 of the drill corrector 60.
1A and 61B. Here, the lower holding device 61B
Is formed with a reference surface 61b.
By pressing the work W on the work W, a reference position at the time of drilling the work W is determined. Thereafter, the control device 64
Controls the moving device 63 to move the drill device 62 in the X and Y directions in accordance with the unbalance amount of the workpiece W, and to move the drill to a position facing the boring position of the workpiece W. Then, the drill device 62 is moved in the Z direction by the moving device 63, and a hole having a depth corresponding to the unbalance amount is formed in the workpiece W.
And the unbalance amount of the work W is corrected.

[0004] On the other hand, there is a case where another drilling device is provided at a position facing the drilling device with the work interposed therebetween, and both surfaces of the work are simultaneously drilled. In this case, by pressing the work against the reference surface of the holding member, a reference position at the time of processing is determined on one surface of the work,
A reference position cannot be determined for the other surface.
For this reason, with respect to the other surface, the reference position at the time of machining is determined by adding or subtracting the distance corresponding to the thickness of the work to the reference position of one surface. However, since there is a processing error in the work, simply adding the thickness of the work to the reference position on one surface cannot set the reference position on the other surface accurately. Cannot be processed.

[0005] Therefore, there is a method of forming an electric circuit between the drill device and the work, detecting a position where the tip of the drill device comes into contact with the work, and starting the energization, and setting this position as a reference position. It has been proposed (first method). Further, the drill device is provided with a touch sensor 70 as shown in FIG. 12, and the spring 71 is compressed by the pressing force of the drill device against the work W when the tip of the drill device comes into contact with the work W. There has also been proposed a method of detecting a decrease in distance and setting a position where the distance between the ABs has decreased as a reference position (second method).

[0006]

However, in the first method, when chips are attached to the tip of the drill, the work and the drill device are energized before the tip of the drill contacts the work. Therefore, the actual machining amount of the work is smaller than the desired machining amount. In the second method, since the tip of the drill is in contact with the workpiece and it is not possible to detect that the tip of the drill has contacted the workpiece until the drill is pressed to some extent, the actual processing amount of the workpiece is the desired processing amount. It will be more than quantity. For this reason, any of the methods includes a processing error, and it is difficult to accurately correct the unbalance amount of the work.

An object of the present invention is to provide a drill correcting machine capable of accurately correcting an unbalance amount even when machining is performed simultaneously from both surfaces of a work.

[0008]

FIG. 1 shows an embodiment of the present invention.
Referring to FIG. 5, the invention of claim 1 is characterized in that work holding means 1 </ b> A and 1 </ b> B that holds the work W by bringing one surface of the work W into contact with the reference surface 1 b, and one surface (A) of the work W
First drill means 3 for drilling a surface
Drill means 5 for drilling the other surface (B surface)
First and second moving means 12 and 22 for moving the first and second drill means 3 and 5 in the direction of the rotation axis of the work W, and first and second moving means 12 and 22 respectively.
The first and second drill means 3 and 5 are respectively moved by a predetermined amount to drill holes on both sides of the work W, thereby forming the work W
A first position detecting means 46A for detecting the position of the first drill means 3; a first position detecting means 46A for detecting the position of the first drill means 3; A first movement amount calculating means for calculating a movement amount of the first drill means on the basis of the detection position of the means; and a first movement amount calculating means for calculating a movement amount of the first drill means on the basis of the movement amount calculated by the first movement amount calculation means. First movement control means 47 for moving the first drill means 3
A; second position detecting means 46B for detecting the position of the second drill means 5; third position detecting means 6, 35 for detecting position information on the position of the second surface B of the work W; Position of the second drill means 5, position information, and second surface B
The second moving amount calculating means 41, 42 for calculating the moving amount of the second drill means 5 based on the unbalance amount of the second and the moving amount calculated by the second moving amount calculating means 41, 42 Movement control means 4 for moving second drill means 5
7B achieves the above object. Referring to FIG. 9, the invention according to claim 2 is applied to a correction device provided with at least two drill correction machines according to claim 1, and the third position detecting means 6, 35 is a first-stage drill correction machine. 60A only, the next and subsequent drill correction machines 60B, 6
The position information detected by the first-stage third position detecting means 6 and 35 is supplied to 0C. The above object is achieved by calculating the amount of movement of the second drill means 5 based on the position information supplied from 60A and the amount of imbalance of the second surface.

In the meantime, in the section of the means for solving the above-mentioned problem which explains the constitution of the present invention, the drawings of the embodiments of the present invention are used in order to make the present invention easy to understand. However, the present invention is not limited to this.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a configuration of a drill correcting machine according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional side view showing a state in which a pusher device described later faces a work, and FIG. FIG. 4 is a view showing a state in which the work is held. As shown in FIGS. 1 to 4, the drill correcting machine according to the present embodiment
Holding member 1A and lower holding member 1B for holding the table from above and below, and a first drill device 3 mounted on the mounting table 2.
A second drill device 5 provided on a movable table 4 movable on the mounting table 2 in a direction perpendicular to the paper surface;
It comprises a pusher device 6 provided in parallel with the second drill device 5 above.

As shown in FIG. 4, the upper holding member 1A and the lower holding member 1B have a V-shaped surface in contact with the work W, and the origin (arrow in FIG. The workpiece W is held so that the reference position of the upper holding member 1A coincides with the reference position (the portion having the deepest V-shape). Further, a reference surface 1b is formed on the lower holding member 1B. By pressing the surface A of the work W against the reference surface 1b, a reference position at the time of drilling on the surface A of the work W is determined.

To the left of the lower holding member 1B on the mounting table 2, two rails 11A and 11B are laid in the left-right direction (Z direction) of FIG.
On these rails 11A and 11B, the first drill device 3
It is possible to move in the direction.

The first drill device 3 includes rails 11A, 1
It comprises a moving unit 12 and a main body 13 mounted on 1B. The moving unit 12 has a base 16 that meshes with a screw rod 15 rotated by an induction motor 14, and the base 1 is rotated by rotation of the induction motor 14.
6 reciprocates in the Z direction on the rails 11A and 11B, whereby the first drill device 3 moves in the Z direction. The main body 13 includes a drill unit 17 and a drill unit 17.
And a unit moving unit 18 for moving the drill unit on a plane perpendicular to the plane of the drawing (XY plane). By driving the unit moving unit 18, the drill unit 17 can freely move on the XY plane.

The lower holding member 1B on the mounting table 2
On the right side of the figure, two rails 19A and 19B are laid in a direction (X direction) perpendicular to the paper surface of FIG. 1, and the moving table 4 is moved on the rails 19A and 19B by a moving unit (not shown).
It is possible to move in the direction. Two rails 21A and 21B are laid on the moving table 4 in the left-right direction (Z direction) of FIG.
The second drill device 5 can be moved in the Z direction on A and 21B.

The second drill device 5 includes rails 21A, 2A.
It comprises a moving part 22 and a main body part 23 placed on 1B. The moving unit 22 has a base 26 that meshes with a screw rod 25 that is rotated by the induction motor 24. The rotation of the induction motor 24 causes the base 2 to move.
6 reciprocates on the rails 21A and 21B in the Z direction, whereby the second drill device 5 moves in the Z direction. The main body 23 includes a drill unit 27 and a drill unit 27.
Is moved on a plane perpendicular to the plane of the drawing (XY plane), and the drill unit 27 can be freely moved on the XY plane by driving the unit moving section.

As shown in FIGS. 2 and 3, the pusher device 6 is provided on the moving table 4 in parallel with the second drill device 5, and a base 31 provided on the moving table 4 is provided.
And a cylinder part 32 provided on a base 31 and a pusher 3 attached to a tip of a rod 33 of the cylinder part 32.
4 and a displacement meter 35 for measuring the amount of movement of the pusher 34. The cylinder portion 32 is made expandable and contractable by a fluid supplied from a fluid supply source (not shown). When the rod 33 expands, the pusher 34 moves toward the workpiece W, and the rod 33 contracts. The pusher 34 moves in a direction away from the workpiece W. And
The displacement of the tip of the pusher 34 at this time is measured by the displacement meter 35. Here, the displacement meter 35 is composed of a displacement sensor such as a DTF, but any means may be used. The pusher 34 has a cup shape so as not to come into contact with the shaft W1 of the work W when the pusher 34 comes into contact with the work W.

The driving of the first drill device 3 and the second drill device 5 is controlled by a control device described below. FIG. 5 is a block diagram showing the configuration of the control device. The control device 50 is composed of a microcomputer and its peripheral devices, and is used for measuring an unbalance amount of the workpiece W by a dynamic balance tester (not shown).
Surface pickup 40A and surface B pickup 40
A signal representing the unbalance amount of the work W by calculating the unbalance amount of the work W based on the input signals SA and SB from B and a signal from the rotation angle reference position sensor 49 for detecting the reference position of the rotation angle of the work W. An unbalance operation unit 41 that outputs QA and QB, and a signal Q input from the unbalance operation unit 41
B-side target value calculation section 42 that calculates a processing target value for B-side of work W based on B and the measurement signal from displacement gauge 35 and outputs signal QB ′, and Z of first drill device 3. A first control unit 47A for controlling the driving in the Z direction and a second control unit 4 for controlling the driving in the Z direction of the second drill device 5
7B.

The first control unit 47A includes an unbalance calculation unit 4
Target value setting for obtaining the machining depth of the work W based on the signal QA representing the unbalance amount of the A surface of the work W input from 1 and setting the target value of the movement amount of the first drill device 3 Unit 43A, the target value of the movement amount of the first drill device 3 set in the target value setting unit 43A,
An adder 44A that calculates a deviation from the displacement of the first drill device 3 detected by the displacement meter 46A that measures the displacement of the drill device 3, and an induction motor 14 based on the deviation calculated by the adder 44A. And a PI control unit 45A for feedback-controlling the driving.

On the other hand, the second control unit 47B determines the machining depth of the work W based on the signal QB 'representing the amount of unbalance of the B surface of the work W input from the target value calculation unit 42 for B surface. A target value setting unit 43B for obtaining and setting a target value of the movement amount of the second drill device 5;
B and the target value of the movement amount of the second drill device 5 set in B, and the second value detected by the displacement meter 46B described later.
Adder 44B that calculates the deviation from the displacement of the drill device 5
And a PI control unit 45B that performs feedback control of driving of the induction motor 24 based on the deviation calculated by the adder 44B.

Next, the operation of this embodiment will be described. The unbalanced amount of the work W is detected for each of the A and B surfaces of the work W by left and right pickups 40A and 40B provided in a dynamic balance tester (not shown), and the detection signals SA and SB and the rotation angle reference position sensor A signal indicating the reference position of the rotation angle of the workpiece W from 49 is input to the unbalance calculation unit 41. In the unbalance calculation unit 41,
The unbalance amount between the A surface and the B surface of the work W is calculated,
The signal QA representing the unbalance amount of the A surface is supplied to the first control unit 47.
A is input to A. On the other hand, the signal QB indicating the unbalance amount of the B surface is input to the target value calculation unit 42 for the B surface, and based on the signal input from the displacement meter 35, the target QB for moving the second drill device 5. The value is computed as described below,
The signal QB 'representing this target value is input to the second control section 47B. In the target value setting units 43A and 43B of the first and second control units 47A and 47B, the first and second target values are set.
The target value to which the drill devices 3 and 5 are to be moved is set.

The calculation and setting of the target value are performed as follows. FIG. 6 is a diagram for explaining setting of a target value to which the first and second drill devices 3 and 5 are to be moved. As shown in FIG. 6, the reference position at the time of processing the surface A of the work W is the reference surface 1b of the lower holding member 1B, and the reference surface 1b is immobile. The tip of the drill of the first drill device 3 has the reference surface 1b of the lower holding member 1B set in advance as an initial position (origin position) O1, and the displacement detected by the displacement meter 46A is based on the reference surface 1b. It will be. Before the work W is processed, the tip of the drill is separated from the reference plane 1b by a predetermined distance L1 to the left of the work W, and this value is detected by the displacement meter 46A. Here, assuming that the processing depth of the surface A of the work W for removing the amount of unbalance detected by the unbalance calculation unit 41 and obtained by the target value setting unit 43A is L2, the first drill device 3 Is moved from the current position by (L1 + L2), desired processing can be performed. Therefore, in the target value setting unit 43A, the movement amount target value of the first drill device 3 is set to (L1 + L2).

On the other hand, the position of the surface B of the work W
In order to accurately determine this position, in the present embodiment, before processing by the second drill device 5, the position of the pusher device 6 is changed as shown by a broken line in FIG. The pusher 34 is brought into contact with the surface B of the work W. Here, as shown in FIG. 6, assuming that the current position of the pusher 34 is O3,
The pusher 34 moves a distance L3 from the current position O3. Here, assuming that the current position of the tip of the drill of the second drill device 5 is O2, the current position O2 and the current position O3
Is known, and this value is defined as L4. Therefore, if the pusher 34 is moved a distance L3, the work W
The second drill device 5 (L
3 + L4) If moved, the tip of the drill of the second drill device 5 comes into contact with the surface B of the work W. Here, calculation is performed by the unbalance calculation unit 41 and the target value calculation unit for surface B,
Assuming that the machining depth of the surface B of the workpiece W for removing the unbalance amount obtained in the target value setting unit 43B is L5, the second drill device 5 is moved from the current position O2 to (L3 +
(L4 + L5) If it moves, desired processing can be performed. Therefore, in the target value setting unit 43B,
The movement amount target value of the second drill device 5 is (L3 + L4 + L
5) is set.

When the target values are set in the target value setting units 43A and 43B, the PI control units 45A and 45B control the induction motor 1 based on the deviation between the displacements detected by the displacement meters 46A and 46B and these target values.
4, 24 are controlled. Then, when the deviation becomes 0, that is, when the machining of the surface A and the surface B of the work W is completed, the PI control units 45A and 45B drive the induction motors 14 and 24 in the reverse direction, and perform the first and second operations.
Are moved to positions away from the surface A and the surface B of the work W, and the correction of the unbalance amount is completed.

As described above, in the present embodiment, even when the surface A and the surface B of the work W are simultaneously processed, the surface of the work W on the side opposite to the reference surface 1b of the lower holding member 1B is processed. The position of a certain plane B can be obtained without error. Thus, the work W can be accurately processed, and the unbalance amount of the work W can be accurately corrected.

In the above-described embodiment, the workpiece W is machined one at a time on each of the surface A and the surface B of the workpiece W. However, when correcting the component force, the unbalance amount is reduced. What is necessary is just to divide into two axes, calculate the cutting depth for each axis, and perform the above-mentioned processing twice.

In this case, as shown in FIG. 7, first and second drill correcting machines 60A and 60B are provided, and while the first drill correcting machine 60A is processing the first axis, the second drill correcting machine 60A, 60B is used. If the drill of the drill corrector 60B is opposed to the processing position of the second axis, the first drill corrector 60A
Then, the work W whose correction has been completed is transported to the second drill corrector 60B, and the first axis can be corrected immediately. As a result, work efficiency is improved as compared with the case where two-axis machining is performed by one drill correction machine. In this case, a pusher device is indispensable for each of the first and second drill correctors 60A and 60B, but the displacement gauge 35 may be provided only for the first drill corrector 60A.

That is, the initial positions of the first and second pusher devices with respect to the reference plane 1b, and the distance between the initial position of the pusher device 6 and the initial position of the drill tip are set to be the same, and the pusher device 6 is set. The distance from the initial position of the work W to the surface B of the work W is determined by the first drill corrector 60A.
May be measured by the displacement meter 35, and the measurement data (position information of the surface B with respect to the reference surface 1b) may be supplied to the second drill corrector 60B.

It should be noted that the position information of the surface B may be the distance between the surface A and the surface B. That is, first, the detection value of the displacement meter 35 when the pusher device 6 is set at the initial position is set to the reference plane 1.
It is stored as a position from b. Next, the difference between the detected value of the displacement meter 35 when the work W is pressed against the reference surface 1b by the pusher device 6 and the detected value stored as described above indicates the thickness of the work W.

If the unbalance cannot be completely corrected in two axes, that is, for example, when it is required to drill three points P1 to P3 on three axes as shown in FIG. As shown in FIG. 9, the first to third drill correcting machines 6
0A to 60C may be provided. Also in this case, similarly to the case where two drill correcting machines 60A and 60B are provided as shown in FIG. 7, the displacement meter 35 for measuring the moving amount of the pusher device is provided only in the first drill correcting machine 60A, and the measurement data is obtained. Only the second and third drill correcting machines 60B and 60C may be supplied.

First, in the first drill corrector 60A, the pusher device 6 is brought into contact with the workpiece W, and the target value of the amount of movement of the first and second drill devices 3, 5 is set as described above. . Then, while processing the point P1 in the first drill corrector 60A, a signal from the displacement gauge 35 in the first drill corrector 60A is output to the second and third drill correctors 60B and 60C. , And sets a target value of the movement amount of the first and second drilling devices 3 and 5 in each of the drill correcting machines 60B and 60C.
Then, after the processing by the first drill corrector 60A is completed, the work W is transported to the second drill corrector 60B, where the processing of the point P2 is performed. Then, after finishing the processing in the second drill corrector 60B, the workpiece W is transported to the third drill corrector 60C, where the processing of the point P3 is performed.

As described above, in order to perform machining at a plurality of locations on each surface of the work W, a plurality of drill correcting machines 60A, 60
0B and 60C are provided, based on the measurement result of the displacement meter 35 in the first drill corrector 60A,
By setting the amount of movement of the drill device in the other drill correcting machines 60B and 60C, even when it is necessary to perform processing at a plurality of locations on both surfaces of the work W, it is necessary to perform measurement by the pusher device for each processing location. Gone
Thereby, the work W can be processed quickly and accurately without requiring a long time in the processing step. In addition, a displacement meter 35 is provided for each of the drill correction machines 60A, 60B, and 60C.
It is not necessary to provide a drill, so that the configuration of the drill correcting machine can be simplified.

In the above embodiment, the shape of the pusher 34 of the pusher device 6 is cup-shaped. However, as shown in the sectional view of FIG. As shown in (b), the shape may be such that it contacts the work W at at least three points around the center line of the work W.

In the above-described embodiment, the target movement amount of the drill device 5 is calculated with the standby position O2 at the time of moving the second drill device 5 as the reference origin, but the reference origin is set as the reference surface 1b. Is also good. In this case, the standby position O
2 is distance data from the reference plane 1b, and the standby position O3 of the pusher device 6 is also distance data with the reference plane 1b as the origin. Alternatively, the standby position O3 of the pusher device 6 may be set as the movement origin position of the drill device 5.

Further, in the embodiment in which machining is performed at a plurality of locations on the work W, three drill modifying machines are used. However, a desired number of drill modifying machines are used according to the machining location of the workpiece W. It is good.

In the correspondence between the above embodiment and the claims, the upper and lower holding members 1A and 1B serve as the work holding means,
Drill device 3 is the first drill means, the second drill device 5 is the second drill means, the moving parts 12, 22 are the first and second moving means, and the displacement meter 46A is the first position. The detection means, the unbalance calculation unit 41 is the first movement amount calculation means, the control unit 47A is the first movement control means, and the displacement meter 46
B is the second position detecting means, and the pusher device 6 and the displacement meter 35 are the third position detecting means.
And the B-side target value calculator 42 constitutes a second movement amount calculator, and the controller 47B constitutes a second movement controller.

[0036]

As described above in detail, according to the present invention, the detection position of the second drill means, the position above the position of the second surface of the work, and the unbalance amount of the second surface are determined. Based on the above, the second drill means is moved to process the workpiece, so that regardless of the thickness error of the workpiece,
The position of the second surface of the work can be accurately determined without error, and thereby the work can be accurately processed by the second drill means. Therefore, it is possible to accurately correct the unbalance amount of the work.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a drill correcting machine according to an embodiment of the present invention.

FIG. 2 is a partial side sectional view showing a configuration of a drill correcting machine according to an embodiment of the present invention.

FIG. 3 is a view in the direction of arrow A in FIG. 1;

FIG. 4 is a view showing a processing position of a work;

FIG. 5 is a block diagram showing a configuration of a control device.

FIG. 6 is a diagram illustrating details of setting the movement amount of the drill device.

FIG. 7 is a block diagram showing another embodiment of the present invention.

FIG. 8 is a view showing a processing position of a work W;

FIG. 9 is a block diagram showing still another embodiment of the present invention.

FIG. 10 is a view showing another embodiment of the pusher.

FIG. 11 is a diagram showing a configuration of a conventional drill correcting machine.

FIG. 12 illustrates a configuration of a touch sensor.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1A Upper holding member 1B Lower holding member 2 Mounting table 3, 5 Drilling device 4 Moving table 6 Pusher device 14, 24 Induction motor 34 Pusher 35 Displacement meter 40A, 40B Pickup 41 Unbalance calculation unit 42 Target value calculation unit for B surface 43A , 43B Target value setting unit 44A, 44B Adder 45A, 45B PI control unit 46A, 46B Displacement meter W Work

Claims (2)

[Claims] 1. A work holding means for holding a work by bringing one surface of the work into contact with a reference surface; first drill means for making a hole in the work; and making a hole in the other surface of the work. Second drill means for processing, first and second moving means for moving the first and second drill means in the direction of the rotation axis of the workpiece, respectively, and the first and second moving means First and second
A drill correction machine for removing the unbalanced amount of the work by boring both surfaces of the work by moving the respective drill means by predetermined amounts, wherein a first position detection for detecting a position of the first drill means Means for calculating a movement amount of the first drill means based on an unbalance amount of the first surface of the work and a detection position of the first drill means; First movement control means for moving the first drill means based on the movement amount calculated by the first movement amount calculation means; and second position detection means for detecting a position of the second drill means. A third position detecting means for detecting position information on the position of the second surface of the work, a detection position of the second drill means, the position information,
A second moving amount calculating means for calculating a moving amount of the second drill means based on the unbalance amount of the second surface; and a moving amount calculated by the second moving amount calculating means. And a second movement control means for moving the second drill means. 2. The method according to claim 1, wherein the drill corrector is at least two.
In the correction device provided with a stand, the third position detection means is provided only in the first-stage drill correction machine, and the position information detected by the first-stage third position detection means is supplied to the next and subsequent drill correction machines. The second movement amount calculating means of the next-stage drill corrector is configured to perform the second movement amount calculation on the basis of the position information supplied from the first-stage drill corrector and the unbalance amount of the second surface. A drill correction device for calculating a movement amount of a drill means.