JPS6411865B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for correcting lateral runout of a shaft gear, and more particularly to improvements in a method and apparatus for automatically measuring and correcting runout of a gear surface of a shaft gear.

In general, shaft gears, such as pinion gears, whose axial direction is long compared to the diameter of the rotating cross section, are deformed during manufacturing or use due to various reasons, and lateral runout occurs on the gear surface, so the deformation is corrected. A means to correct the lateral runout of the gear surface is required.

In order to accurately correct such lateral runout, it is first necessary to accurately detect the amount of lateral runout of the gear surface. However, conventional detection does not directly detect the lateral runout of the gear surface from the gear surface, but indirectly detects the lateral runout from the lateral runout near the gear on the support shaft that supports the gear. It was not possible to obtain detection accuracy, and as a result, it was not possible to improve the accuracy of correcting the lateral runout of the gear surface. Therefore, there has been a drawback that the necessary correction accuracy cannot be obtained, especially for shaft gears with strict standards.

Further, in general, correction of lateral runout occurring on the gear surface of the shaft gear is performed by a pressing operation that applies a predetermined pressing load to the gear surface. However, conventional devices simply control the pressing load in this pressing operation in stages, and when setting the pressing load, no consideration is given to the characteristics of the shaft gear, changes in its characteristics during correction, changes over time of the correction device itself, etc. I didn't pay. For this reason, it has not been possible to quickly and efficiently correct the lateral runout of the shaft gear.

The present invention has been made in view of such conventional problems, and its purpose is to provide a method for correcting lateral runout of a shaft gear, which can quickly and accurately correct the lateral runout occurring on the gear surface of the shaft gear. The goal is to provide equipment.

In order to achieve this object, the method of the present invention includes a detection step in which a shaft gear is rotated, a probe is brought into direct contact with the gear surface, and lateral runout of the gear surface is detected from the amount of deflection of the probe; and a correction step of correcting the lateral runout of the gear surface by repeatedly performing a pressing operation on the gear surface when the detected lateral runout exceeds a standard value, and the correction step is based on the lateral runout value detected in the detection step. During the initial correction process in which the load value is calculated and the pressing operation is performed using this calculated load value, and the lateral runout correction amount in the previous correction process and the load value at that time until the lateral runout detection value in the detection process falls within the standard value. The present invention is characterized by comprising an iterative correction step of calculating a new load value based on the calculated load value and sequentially controlling the load value of the pressing operation to this calculated load value.

In addition, in order to carry out this method, the apparatus of the present invention includes a rotation support device that supports both ends of the shaft gear in a radially movable state and provides rotational drive of at least one rotation to the shaft gear; A detection device has a ball probe that comes into direct contact with the gear surface of the gear rotated by the gear, and detects the lateral runout of the gear surface from the amount of deflection of the probe obtained from one revolution of the gear, and a pressing ram that detects the lateral runout of the gear surface. A pressing device corrects the lateral runout of the gear surface by applying pressure to the gear surface using a mechanical ram, and a rotation support device is controlled to rotate and the detection device detects the lateral runout of the gear surface, and the detected value is set to the standard. If the value exceeds the value, the pressing device is controlled and the pressing operation is repeated until the detected lateral vibration value is corrected to within the standard value, and the detecting device first detects the pressing load of the first pressing operation. It is characterized by comprising a control device that performs calculation control based on the detected value of lateral runout, and also performs calculation control of the pressing load of the second and subsequent pressing operations based on the pressing load of the previous pressing operation and the amount of lateral vibration correction. shall be.

Next, preferred embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a preferred embodiment of the device of the invention.

The shaft gear 10 is rotatably supported at its both ends by a pair of centers 14 of a rotation support device 12, and the lateral runout of the gear surface 10a is corrected. This rotational support device 12 is provided with a motor 16, which provides at least one rotational drive to the rotatably supported shaft gear 10. Further, this rotation support device 12 is installed on a base 17 so as to be extendable and retractable via a pair of springs 18, and the shaft gear 10
is supported so as to be movable in the radial direction.

The shaft gear 10 supported by the rotation support device 12 in this manner has lateral runout on its gear surface detected by the detection device 20. The first characteristic feature of the present invention is that the amount of lateral runout on the gear surface 10a is detected from the amount of deflection that occurs in the probe 22 when the probe 22 is brought into direct contact with the gear surface 10a and the shaft gear 10 is rotated. There is a particular thing. In the embodiment, the probe 2
The displacement detector 24 further detects the deflection amount that occurs in the probe when the tip of the probe 2 is brought into contact with substantially the center of the gear surface 10a with a constant biasing force, and the shaft gear 10 is driven to rotate at least one rotation. By doing so, the amount of lateral runout of the gear surface 10a is detected.

By directly detecting the lateral runout from the gear surface 10a of the shaft gear 10 in this manner, it is possible to further improve the detection accuracy and, by extension, the accuracy of correcting the lateral runout.

In this embodiment, a ball probe is used as the probe 22. This takes into consideration the case where the tooth 10b of the shaft gear 10 is formed in a spiral shape. That is, the shaft gear 10
When the tooth 10b is formed in a spiral shape, the tip of the probe 22 cross-sectionally engages the tooth 10b portion on the gear surface 10a.
Even in such a case, if the tip of the probe 22 is formed into a ball shape, the tip and the gear surface 10a can be connected.
It is possible to make smooth contact with the

FIG. 2 shows the lateral runout detection data of the gear surface 10a detected in this manner. Here, the lateral vibration of the gear surface 10a has a large amplitude x
It is expressed as Note that the fine vibrations included in the detection data in the figure are caused by the tip of the ball probe 22 intermittently engaging with the teeth of the gear surface 10a.

The shaft gear 10 rotatably supported by the rotation support device 12 has its lateral runout on the gear surface 10a corrected by the pressing device 26. This pressing device 26 includes a pressing ram 28 that performs a downward pressing operation on approximately the center of the gear surface 10a of the shaft gear 10.
and a pedestal 30 that supports both ends of the shaft gear 10 against the pressing load of the pressing ram 28 when the shaft gear 10 is pushed down to some extent. Therefore, the rotation support device 12 is controlled so that the maximum lateral runout position on the gear surface 10a of the shaft gear 10 is upward,
By applying a pressing load by the pressing ram 28 to the gear surface 10a, it is possible to correct the deformation of the shaft gear 10 with respect to the rotation axis and to correct the lateral wobbling of the gear surface 10a. Note that a sensor 32 is provided at the lower end of the pedestal 30 to detect a pressing load value when a pressing operation is applied to the shaft gear 10.

A second characteristic feature of the present invention is that the pressing operation performed by the pressing device 26 is controlled to a pressing load that corresponds to the change in the characteristics of the shaft gear 10, so that the gear face 10a of the shaft gear 10 is The object of the present invention is to quickly and efficiently correct lateral wobbling in a vehicle.

Reference numeral 34 denotes a control device for this purpose, which is composed of an arithmetic/judgment processing section 36 and a sequence section 38. The calculation/judgment processing unit 36 determines whether the lateral runout on the gear surface 10a of the shaft gear 10 is within the standard value based on the detected lateral runout value of the shaft gear 10 inputted from the displacement detector 24, and If it is determined that the value is outside the value, the horizontal vibration detection value and the weight sensor 3
The load amount for the next pressing operation is calculated from the pressing load value input from step 4. Then, the sequence section 38
is the motor 1 while coordinating with the calculation/judgment processing section 36.
4 and the pressing ram 28. This control operation is performed according to the flowchart shown in FIG.

The apparatus of the present invention has the above-mentioned structure. Next, the operation of the method of the present invention will be explained based on the flowchart of FIG.

First, the shaft gear 10 that requires correction of lateral runout of the gear surface 10a is rotatably supported on the rotation support device 12, and the tip of the ball probe 22 is placed approximately in the center of the gear surface 10a with a constant biasing force. and touch it.

Then, the motor 16 is driven to rotate, and the shaft gear 10 is driven to rotate at least one rotation. At this time, the ball probe 22 moves up and down while intermittently engaging with the teeth 10b of the gear surface 10a, and the displacement detector 24 detects the displacement of the ball probe 22 as shown in FIG.

The calculation/judgment processing section 36 calculates the amount of lateral runout x on the gear surface 10a of the shaft gear 10 from the data shown in FIG. 2 inputted from the displacement detector 24. In this calculation, the maximum value a _nax and the minimum value a _nio are selected from among the points {a ₁ , a ₂ ... a _o } where the probe 22 abuts the deepest part of each tooth on the gear surface 10a. , according to the following equation: x=a _nax −a _nio (1).

Then, the calculation/judgment processing unit 36 determines whether the calculated lateral shake amount x is within the standard, and if it is determined that it is within the standard, completes the correction operation.

Furthermore, if it is determined that the lateral runout amount x is not within the standard, the pressing load y ₁ of the first pressing operation is calculated based on the lateral runout amount x according to the following formula.

y ₁ = k (ax ^r + b) ......(2) However, a, r, and k are constants. b is a constant that is changed/determined by self-learning by calculating and processing the most recent i-time correction amount of the shaft gear.

The sequence unit 38 then controls the motor 16 to rotate the shaft gear 10 to a position where the maximum lateral runout position of the gear surface 10a faces the pressing ram 28. After that, the sequence section 38 presses the pressing ram 2.
8 and causes the pressing ram 28 to perform an initial pressing operation on the gear surface 10a of the shaft gear 10 using the calculated value y ₁
This is done with a pressure load of

When this first pressing operation is completed, the sequence unit 38 drives the motor 16 to provide rotational drive to the shaft gear 10 for at least one rotation. Thereby, the detection device 20 consisting of the ball probe 22 and the displacement detector 24 detects the lateral runout of the shaft gear 10, and based on the detection result, the calculation/judgment processing section 36
It is determined whether the lateral runout of the shaft gear 10 has been corrected to within the standard.

If it is determined that the modification is within the specifications, the modification operation is completed at that point.

In addition, if it is determined that the correction has not been made within the specifications, the characteristic value of the shaft gear 10 is determined from the pressing load in the previous pressing operation and the amount of correction, and the pressing load in the next pressing operation is set to the optimum value. Control calculations. In the embodiment, the calculation control of the pressing load y ₂ from the second time onwards is performed based on the following equation.

y ₂ =k·N(ax ^r +b) However, N is a constant determined by the amount of excess or deficiency of the pressing load.

Then, such a pressing operation is repeated, and the correction operation is completed when the amount of lateral runout of the shaft gear 10 is corrected to within the specification.

As described above, according to the present invention, it is possible to accurately detect the lateral runout on the gear surface of the shaft gear, so that the lateral runout on the gear surface of the shaft gear can be corrected with high accuracy. Also,
According to the present invention, the pressing operation for correcting lateral runout on the gear surface of the shaft gear is controlled to an optimum value in accordance with the correction characteristics of the shaft gear, so that the correction work can be performed quickly and accurately.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a preferred embodiment of the present invention,
Figure 2 is a detection data diagram of the amount of lateral runout on the gear surface of the shaft gear detected by the detection device in Figure 1;
This figure is a flowchart showing the operation of the embodiment shown in FIG. 1. 10... Shaft gear, 10a... Gear surface, 12...
... Rotation support device, 20 ... Detection device, 22 ... Ball probe, 26 ... Pressing device, 28 ... Pressing ram, 34 ... Control device.

Claims (1)

[Claims] 1. A detection step in which a shaft gear is rotated, a probe is brought into direct contact with the gear surface, and the lateral runout of the gear surface is detected from the amount of runout of the probe, and the lateral runout detected in the detection step is a correction step of repeatedly performing a pressing operation on the gear surface to correct lateral runout of the gear surface when the standard value is exceeded;
The correction process consists of an initial correction process in which a load value is calculated based on the detected lateral runout value in the detection process and a pressing operation is performed using this calculated load value, and a correction process in which the detected lateral runout value in the detection process falls within the standard value. It consists of an iterative correction process in which a new load value is calculated based on the lateral runout correction amount in the previous correction process and the load value at that time, and the load value of the pressing operation is sequentially controlled to this calculated load value. A method for correcting lateral runout of a shaft gear. 2. A rotation support device that supports both ends of the shaft gear in a radially movable state and provides at least one rotational drive to the shaft gear, and a ball probe that directly contacts the gear surface of the gear rotated by the rotation support device. It has a detection device that detects the lateral runout of the gear surface from the amount of runout of the probe obtained from one revolution of the gear, and a pressing ram that performs a pressing operation on the gear surface of the gear. A pressing device corrects the lateral runout of the surface, and a rotation support device is controlled to rotate, the detection device detects the lateral runout of the gear surface, and when the detected value is above the standard value, the pressing device is controlled to detect the lateral runout detection value. The pressing operation is repeated until the pressure is corrected to within the standard value, and the pressing force of the first pressing operation is calculated and controlled based on the lateral runout detection value that the detection device first detects, and the pressing force after the second pressing operation is A lateral run-out correction device for a shaft gear, comprising: a control device that calculates and controls a press load of an operation based on a press load of a previously performed pressing operation and a lateral run-out correction amount.