JPH08313383A - Balancing machine with machining function - Google Patents

Abstract

PURPOSE: To measure and correct the unbalance quantity without moving a rotating component by machining the rotating component with a machining device in conformity with the unbalance quantity and the phase computed by a computer while rotating the rotating component at low speed by a correcting driver. CONSTITUTION: After fitting a dummy 17 to a rotating component 1, a measuring driver 2 is actuated to rotate the component 1, and the unbalance quantity and the phase are measured by a computer 6. Using an angle plate 27, the component 1 is manually adjusted to the displayed phase. While adjusting a grinding part 28 by the vertical moving handle 30 of a machining device 9, the electromagnetic clutch of a correcting driver 11 is put in the on state by a lever 26, and the component 1 is rotated at low speed to chip the component 1 in the circumferential direction by the unbalance quantity, the computed result. After actuating the measuring driver 2, a gear lever is thrusted, and the unbalance quantity and the phase are measured. Cutting and phase measuring procedure are alternately repeated until the unbalance quantity becomes the specified value or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balancing machine having a machining function for easily measuring and correcting the amount of unbalance of rotating parts.

[0002]

2. Description of the Related Art Since a large rotating component such as a shaft of an aircraft engine is a component that rotates at a high speed of tens of thousands of revolutions, high precision is required for the dynamic balance during high-speed rotation. Therefore, the accuracy is increased by repeating the step of measuring the unbalance amount of the rotating component with the balancing machine and the step of processing with the processing device according to the measurement result.

A balancing machine is a so-called dynamic equilibrium testing machine, the principle of which will be described with reference to FIG. A bearing type is often used as the dynamic balance tester. As shown in FIG. 4 (A), the bearing 12 is fixed and the rotary component 1 is allowed to vibrate around the bearing 13. As shown in FIG. 1B, the bearing 13 is fixed, and the rotating component 1 can vibrate around the bearing 12 to detect the unbalance.

Further, both bearings 12 and 13 are shaken at the same time,
There is also one that forms a two-degree-of-freedom vibration system to detect unbalance. Then, the magnitude and phase of the unbalance of the rotating component 1 are determined by measuring the amplitude and phase of the vibration caused by the dynamic unbalance of the rotating component 1.

FIG. 5 is a side view of a general balancing machine. A measuring bearing 5 that is provided with a sensor 4 that supports the rotating component 1 that measures the unbalance amount and that measures the vibration thereof; and a computing unit 6 that computes the unbalance amount and its phase from the signal of the sensor 4. A measuring drive device 2 that rotationally drives the rotating component 1 when measuring the amount of unbalance of the rotating component 1, an output shaft 7 that transmits its output to the rotating component 1 via a drive joint 3, and a measuring bearing 4.
And a bed 8 for supporting.

The measuring drive device 2 is composed of a drive motor (not shown) housed in the device 2 and a gear with a transmission (not shown) for changing the rotation speed. The rotation speed can be changed by changing the gear with the speed change lever 14.

Further, the calculation result of the unbalance amount and its phase by the arithmetic unit 6 is displayed on the digital or analog display device 15.

A rail 16 is provided on the bed 8, and a measurement bearing 5 is provided on the rail 16 so as to be movable in the axial direction of the rotary component 1.

In a large rotating part such as a shaft of an aircraft engine, a dummy 17 of about 200 kg is connected to the tip of the large rotating part in order to measure the amount of unbalance according to the actual use conditions. Further, since the correction amount is large, the correction weights 18 having a stock allowance are provided in two places in advance.

After the measurement is completed, the rotary component 1 is removed from the balancing machine, and a small crane or the like is used to place it on the processing apparatus to perform processing in accordance with the displayed processing amount and processing location (phase).

[0011]

In the method of correcting the unbalance amount of the rotating parts described above, since the balancing machine for measuring the unbalance amount and the processing device for correcting the unbalance amount are separately provided, I have to move.

However, since a large rotating component such as a shaft of an aircraft engine is a heavy object and a dummy of about 200 kg is connected to its tip, it takes a long time to move. Further, the shaft of the aircraft engine is required to have a high degree of accuracy such that the misalignment is 2 to 5 μm or less, and an error is caused only by moving and attaching the rotary component to the processing device.

Further, the measurement and correction of the unbalance amount are repeated many times. Therefore, there has been a problem that a great deal of labor and time are required in the process of moving the parts.

The present invention was devised to solve the above problems. That is, it is an object of the present invention to provide a balancing machine having a processing function for facilitating measurement and correction of an unbalance amount without moving a rotating component.

[0015]

According to the present invention, a measuring bearing provided with a sensor for supporting a rotating component for measuring an unbalance amount and measuring its vibration, and an unbalance amount from a signal of the sensor. And a computing device that calculates the phase, a processing device that corrects the unbalance amount based on the calculation result, a correction bearing that supports the rotating component when correcting the unbalance amount, and an unbalance amount when measuring the unbalance amount. A measurement drive device that rotationally drives a rotary component, a correction drive device that rotationally drives a rotary component when correcting an unbalance amount, a measurement drive device, and a correction drive device are switchably connected. There is also provided a balancing machine having a processing function, which comprises an output shaft for transmitting its output to a rotary component.

According to a preferred embodiment of the present invention,
While rotating the rotating component at a low speed by the correction drive device, the processing device corrects the unbalance amount by processing the rotating component according to the unbalance amount calculated by the calculator and its phase.

Further, according to a preferred embodiment of the present invention, the processing device is a two-axis end mill which is movable in a horizontal direction and a vertical direction.

Further, according to a preferred embodiment of the present invention, the correction bearing is retracted when measuring the unbalance amount of the rotating component, and the rotating component is moved from the measuring bearing when correcting the unbalance amount. It is configured to lift.

[0019]

According to the above-mentioned apparatus of the present invention, since the balancing machine for measuring the amount of unbalance of rotating parts is provided with the processing device for correcting the amount of unbalance, it is not necessary to move the parts. In addition, the correction bearing is retracted when measuring the unbalance amount of the rotating component, and the rotating component is configured to be lifted from the measurement bearing when correcting the unbalance amount. It is smooth and easy to switch between the step of performing and the step of correcting the unbalance amount.

Therefore, the imbalance amount can be easily measured and corrected, and especially when the measurement and correction are repeated many times, the labor and time in the process can be greatly reduced.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIGS. In each figure, the same parts as those in the related art are designated by the same reference numerals, and a duplicate description will be omitted.

FIG. 1 is an overall side view when measuring an unbalance amount of a balancing machine having a processing function of the present invention.

In the embodiment shown in the figure, the measuring bearing 5 is provided with a sensor 4 for supporting the rotating component 1 for measuring the amount of imbalance and measuring its vibration, and the amount of unbalance from the signal of the sensor 4. A calculator 6 for calculating the phase
A processing device 9 that corrects the unbalance amount based on the calculation result, a correction bearing 10 that supports the rotating component 1 when correcting the unbalance amount, and a rotating component 1 that rotates when measuring the unbalance amount. Measurement drive device 2 to be driven
And a correction driving device 11 that rotationally drives the rotary component 1 when correcting the unbalance amount, and a measurement driving device 1 and the correction driving device 11 are switchably connected and their outputs are drive joints. And an output shaft 7 that is transmitted to the rotary component 1 via the shaft 3.

As the processing device 9 for correcting the unbalance amount, for example, a two-axis end mill whose grinding portion 28 can be moved horizontally and vertically by a horizontal movement handle 29 and a vertical movement handle 30 is used. It

FIG. 2 is a front view of the correction bearing 10 that supports the rotary component 1 when the unbalance amount is corrected. The correction bearing 10 includes a bearing leg 19, a bearing head 20 having a roller 23, a hydraulic jack 21, and a hydraulic jack 2.
A pair of parallel guide rods 22 provided on both sides of 1,
22 is a roller bearing.

When the unbalance amount of the rotating component 1 is measured by the hydraulic jack 21 while the bearing head 20 is kept horizontal by the guide rods 22 and 22, the rotating component 1 is retracted by about 5 mm to correct the unbalance amount. When doing so, the rotary component 1 is lifted from the measurement bearing 5 by about 5 mm. Further, since FIG. 1 is a diagram for measuring the amount of unbalance, the correction bearing 10 is in a retracted state. Further, the correction bearing 10 supporting the dummy 17 side is provided with a hydraulic pressure meter 24, and the hydraulic pressure supply line 25 allows the hydraulic pressure jacks 21 and 2 to be connected.
The hydraulic pressure is supplied to 1.

Although the correction bearing 10 shown in the figure is installed separately from the bed 8, a roller that meshes with the rail 16 is attached to the bearing leg 19 to make it movable on the rail 16. Good.

If the unbalance amount is corrected while the rotating bearing 1 is supported by the measuring bearing 5, a large load is applied to the measuring bearing 5 and vibration is also transmitted, which causes failure of the sensor 4 and measurement. If swarf enters the gap between the bearing 5 and the rotary component 1, the amount of unbalance cannot be accurately measured. Therefore, the correction bearing 10 is provided separately from the measurement bearing 5.

Returning to FIG. 1, the correction drive device 11 for rotating the rotary component 1 when correcting the unbalance amount is
For example, a 100V single-phase motor (not shown) is used, and an electromagnetic clutch (not shown) is turned on by a lever 26.
It can be switched between ON and OFF. Further, around the axis of the output shaft 7, there is provided an angle board 27 for adjusting the phase of the rotary component 1 to the calculation result when correcting the unbalance amount of the rotary component 1.

FIG. 3 is an overall side view when correcting the unbalance amount of the balancing machine having the processing function of the present invention. As shown in the figure, the correction bearing 10 is in a state in which the rotary component 1 is lifted from the measurement bearing 5. At this time, since the drive joint 3 is a so-called universal drive joint, there is no problem even if the drive shaft and the rotation shaft are deviated.

Next, the procedure for measuring and correcting the unbalance amount of the rotating component 1 and its phase by the device of the present invention will be described. (1) After attaching the dummy 17 to the rotating component 1, attach it to this device. (2) The measurement driving device 2 is operated to rotate the rotating component 1 at a rotation speed of about 1000 RPM, and the arithmetic unit 6 measures the unbalance amount and its phase. (3) After the calculation result is displayed on the display device 15, the measuring drive device 2 is stopped after the gear of the measuring drive device 2 is set to the neutral state. (4) Manually adjust the rotating component 1 to the displayed phase using the angle board 27. (5) The rotating bearing 1 is lifted from the measuring bearing 5 by about 5 mm by the correcting bearing 10. (6) The grinding unit 28 of the processing device 9 is moved to the position of the correction weight 18 having the allowance for the rotary component 1 by the horizontal movement handle 29 and the vertical movement handle 30. (7) While adjusting the grinding portion 28 by the vertical movement handle 30 of the processing device 9, the electromagnetic clutch of the correction drive device 11 is turned on by the lever 26, and 0.00
The rotating component 1 is rotated at a low speed at a desired rotation speed of 3 to 0.3 RPM to scrape the unbalance amount of the calculation result in the circumferential direction of the rotating component 1. (8) After the correction of the unbalance amount of the rotary component 1 is completed, the correction drive device 11 is stopped, the processing device 9 is stopped, and the grinding portion 28 is moved to the original position. (9) The correction bearing 10 is retracted, and the rotary component 1 is placed on the measurement bearing 5. (10) The measurement drive device 2 is operated and then the gear is put in to measure the unbalance amount and its phase. (11) The measurement is completed and the calculation result is displayed on the display device 15. (10) If the unbalance amount is not equal to or less than the regulation value (for example, 2 to 5 μm or less in the case of misalignment of the shaft of the aircraft engine), return to (2).

The above steps (1) to (10) are repeated until the unbalance amount becomes equal to or less than the regulation value.

According to the above procedure, the measurement and correction of the unbalance amount of the rotary component 1 can be performed without moving the rotary component 1. Further, the arithmetic unit 6, the angle board 27, the processing device 9 and the correction drive device 11 are electrically connected,
The above (4), (6) to (8) may be automated so as to operate based on the calculation result.

The present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0035]

According to the balancing machine having the machining function of the present invention described above, it is not necessary to move the rotating part from the balancing machine for measuring the unbalance amount of the rotating part to the processing device for correcting the unbalance amount. Therefore, the time required for the movement can be omitted, and the accuracy of balancing and processing can be improved.

Further, since the rotary component is simply placed on the correction bearing or the measurement bearing, the process of measuring the amount of unbalance and the process of correcting the amount of unbalance can be replaced smoothly and easily. Therefore, it is possible to easily and accurately repeat the measurement and correction of the unbalance amount of the rotating component.

[Brief description of drawings]

FIG. 1 is an overall side view when measuring an unbalance amount of a balancing machine having a processing function of the present invention.

FIG. 2 is a front view of the correction bearing of the present invention.

FIG. 3 is an overall side view when correcting an unbalance amount of a balancing machine having a processing function of the present invention.

FIG. 4 is an explanatory diagram showing the principle of a balancing machine.

FIG. 5 is a side view of a conventional balancing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotating part 2 measurement drive device 3 drive joint 4 sensor 5 measurement bearing 6 arithmetic unit 7 output shaft 8 bed 9 processing device 10 correction bearing 11 correction drive device 12, 13 bearing 14 speed change lever 15 display device 16 rail 17 Dummy 18 Correction weight 19 Bearing leg 20 Bearing head 21 Hydraulic jack 22 Guide rod 23 Roller 24 Oil pressure meter 25 Hydraulic supply line 26 Lever 27 Angle plate 28 Grinding part 29 Horizontal movement handle 30 Vertical movement handle

Claims (4)

[Claims] 1. A measuring bearing, which is provided with a sensor for supporting a rotating component for measuring an unbalance amount and for measuring its vibration, and a computing device for computing an unbalance amount and its phase from a signal of the sensor. A processing device that corrects the unbalance amount based on the calculation result, a correction bearing that supports the rotating component when correcting the unbalance amount, and a measurement drive device that rotationally drives the rotating component when measuring the unbalance amount. And a correction driving device that rotationally drives the rotating component when correcting the unbalance amount, and a measurement driving device and a correction driving device that are switchably connected, and an output that transmits the output to the rotating component. A balancing machine having a machining function characterized by comprising a shaft. 2. The machining according to claim 1, wherein the rotating device is rotated at a low speed by the correction driving device, and the rotating device is processed by the processing device in accordance with the unbalance amount calculated by the arithmetic machine and its phase. Balancing machine with functions. 3. A balancing machine having a machining function according to claim 1, wherein the machining device is a two-axis end mill that is movable in a horizontal direction and a vertical direction. 4. The correction bearing is retracted when measuring an unbalance amount of a rotating component, and the rotating component is lifted from the measuring bearing when correcting the unbalance amount. Balancing machine with the described processing functions.