JPH09170919A - Measuring device for deflection of tooth space and measuring method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely and easily measure the deflection of a tooth space of a rough form material of a tooth parts held under the eccentric condition. SOLUTION: Contact pieces 2a and 3a of probes 2 and 3 are made contact to a tooth space and tip of a tooth form parts W in order, respectively, and displacement amount (stroke amount) of the contact pieces 2a and 3a of the probes 2 and 3 are measured, and tooth space data and large diameter data are taken in. Based on the large diameter data, sine curve to which rotational displacement of the tooth form parts W is approximated is found. And, when the maximum value of difference between each large diameter data above and rotational displacement approximate value is larger than a specified value, error is outputted, and when that is smaller, a rotational displacement approximate value corresponding to each tooth space above is calculated, and the rotational displacement approximate value is subtracted from each tooth space data above for correction, and the maximum δmax and δmin out of the tooth space data corrected are outputted as the deflection of the tooth space above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tooth groove runout measuring apparatus and a measuring method therefor, and more specifically, a contact piece of a probe is brought into contact with a tooth groove of a rough profile material of a tooth profile part to displace the contact piece. The present invention relates to a tooth groove vibration measuring device and a measuring method for measuring the tooth groove vibration based on an amount.

[0002]

2. Description of the Related Art For a tooth profile part having a tooth profile formed by forging or the like, for example, the runout of a tooth groove is measured in order to obtain the molding accuracy of the tooth profile. When measuring runout of conventional tooth space,
As shown in FIG. 8, the pawl 10 of the rotatable chuck portion 1
The hole Wa of the tooth profile part W is held by the contact piece 5a of the single probe 5 is brought into contact with each tooth groove of the tooth profile part to measure the displacement amount (stroke amount) of the contact piece, and the measured displacement amount The maximum value and the minimum value of are calculated as the tooth groove runout.

Another conventional measurement of tooth groove runout is to measure the coordinate value of the tooth groove with a three-dimensional measuring machine.

[0004]

However, as shown in FIG. 8, the center W _{0 of the} hole Wa formed in the rough material of the tooth profile part W has the large diameter of the tooth profile part W, that is, the diameter of all the tooth tips. There is a case of being eccentric from the center (hereinafter, referred to as center C) of the tooth profile, and after measuring the runout of the tooth groove, the hole Wa of the tooth profile part W is formed so as to be aligned with the center C. Therefore, in order to measure the runout of the tooth groove, the chuck portion 1 holds the hole Wa of the rough material of the tooth profile part W, and the chuck portion 1 is rotated to bring the contact piece 5a of the tracing stylus 5 into contact with each tooth groove. Then, the contact piece 5a of the tracing stylus 5 is brought into contact with the tooth groove of the tooth-shaped component W held in an eccentric state, and there is a problem that the runout of the tooth groove cannot be accurately measured.

Further, among the above-mentioned conventional techniques, when a coordinate measuring machine is used, there is a problem that it takes time and labor to measure the coordinate values of each tooth groove.

The present invention has been made in view of the above problems, and a first object thereof is to accurately and easily measure the runout of a tooth groove of a rough profile material of a tooth profile part held in an eccentric state. It is an object of the present invention to provide a tooth groove runout measuring device capable of performing the above.

The present invention has been made in view of the above problems, and a second object of the present invention is to accurately and easily perform a runout of a tooth groove of a rough profile material of a tooth profile part held in an eccentric state. Another object of the present invention is to provide a method for measuring runout of a tooth space that can be measured.

Further, the present invention has been made in view of the above problems, and a third object thereof is to provide a tooth groove runout measuring method capable of enhancing the reliability of measurement of tooth groove runout. It is in.

[0009]

In order to achieve the above-mentioned first object, the feature of the tooth groove runout measuring device of the first invention is that a chuck portion rotatably holds a tooth profile component having a tooth groove, A tooth groove probe having a contact piece that contacts the tooth groove of the tooth profile, a large-diameter probe having a contact piece that contacts the tooth tips of the tooth profile, and a rotational deviation of the tooth profile based on the measured value of the large probe. The calculation unit calculates a position, corrects the calculated rotational deviation of the tooth profile component, and calculates a tooth groove runout.

In order to achieve the above-mentioned second object, the feature of the tooth groove runout measuring method of the second invention is that the tooth contact and the tooth tip of the tooth profile part rotatably held are respectively contact pieces of the measuring element. Are sequentially contacted, the displacement of the contact piece of the contact point is measured, the rotational deviation of the tooth profile part is calculated from the displacement of the contact piece with respect to all tooth tips, and the rotational deviation of the tooth profile part is corrected to correct the tooth gap. Is to calculate the shake of.

In order to achieve the third object, the tooth groove runout measuring method of the third invention is characterized in that in the second invention, the calculated rotational deviation amount of the tooth profile part is equal to or more than a predetermined value. If, the measurement error is output.

In the first aspect of the invention, the tooth profile part is held by the chuck part, all the tooth spaces and the tooth tips of the tooth profile part are measured by the tooth groove measuring element and the large diameter measuring element, and the measurement values of all the tooth tips are calculated by the calculating section. Then, the rotational deviation of the tooth profile part is calculated, and the rotational deviation is corrected by adding or subtracting this rotational deviation amount to the measured value of the tooth groove runout to calculate the maximum and minimum values of the tooth groove runout.

According to the second aspect of the invention, the contact pieces of the contact point are respectively brought into contact with all the tooth spaces and the tooth tips of the tooth-shaped component to measure the displacement amount of the contact pieces with respect to the tooth grooves and the tooth tips. From the displacement amount of the contact piece with respect to the tooth tip, the rotational deviation amount with respect to the outer diameter of the tooth tip of the tooth profile part can be calculated. The measurement value of the runout of the tooth space is corrected by adjusting the amount of rotational deviation, and the maximum value and the minimum value of the displacement amount of the probe with respect to the tooth space are calculated.

According to the third aspect of the invention, when the calculated rotational deviation amount of the tooth profile part is equal to or larger than a predetermined value, the rotational deviation amount is large, and the reliability of the correction of the tooth groove runout cannot be recognized. Output an error.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a tooth groove deflection measuring apparatus according to the present invention will be described with reference to FIGS. 1 and 2. In the drawings, the same reference numerals denote the same or corresponding parts. In the case of this embodiment, the tooth-shaped component W has 12 teeth and a tooth groove, and is provided with a hole slightly eccentric from the center. In FIG. 1, reference numerals are given only to a part of the tooth groove and the tooth tips of the tooth profile component, but the reference numerals sequentially increase to 12 in the clockwise direction corresponding to the numbers shown in FIGS. 4 to 7. Are arranged as follows.

The tooth groove run-out measuring apparatus according to the present invention generally includes a chuck portion 1 for rotatably holding a tooth profile part W,
A tooth gap measuring element 2 having a contact piece 2a that contacts the tooth groove of the tooth profile part W, a large diameter measuring element 3 having a contact piece 3a that contacts the tooth tip of the tooth profile part W, and a rotational deviation of the tooth profile part W The calculation unit 4 calculates the deviation of the tooth space in consideration.

In this embodiment, the chuck portion 1 uses a scroll chuck having three pawls 10, and is attached to a rotary shaft 12 provided on a base 11. Each pawl 10 moves the same amount at the same time,
The holes Wa of the tooth-shaped component W are separated by being separated from each other in the radial direction.
Hold. In this embodiment, the chuck portion 1 attached to the rotary shaft 12 is manually rotated.

The tooth space measuring element 2 comprises a contact piece 2a capable of contacting the tooth space of the tooth profile part W, and the contact piece 2a.
Is displaced in the radial direction of the tooth-shaped component W, and the displacement amount when the contact piece 2a contacts the tooth space is measured. In the case of this embodiment, as the probe 2, a displacement sensor such as an overcurrent displacement sensor or a magnescale whose voltage changes according to the displacement amount of the contact piece 2a can be used. The tooth space measuring element 2 includes the first shaft 2 provided on the support base 20.
The support base 20 is supported by a rail 1 (not shown) laid on the base 11 so as to be movable between a measurement position and a retracted position.

The large-diameter probe 3 is provided with a contact piece 3a capable of contacting the tip of the tooth profile part W, and the contact piece 3a.
Is displaced in the radial direction of the tooth-shaped component W, and the displacement amount when the contact piece 3a contacts the tooth tip is measured. As the large-diameter probe 3, a displacement sensor can be used as in the tooth space probe 2, and the second shaft 31 provided on the support base 30 can be used.
It is supported by. The support base 30 is the base 11
It is mounted so that it can be moved between the measurement position and the retracted position and that it can be moved around the axis of the tooth profile part W according to the module of the tooth profile part W. . In this embodiment, as shown in FIG. 1, the contact piece 2a of the tooth gap measuring element 2 has the tooth gap A ₁ of the tooth profile part W.
When the contact piece 3a of the large-diameter probe 3 contacts the tooth space A,
It is arranged so as to contact a tooth tip B ₃ between ₂ and the tooth groove A ₃ .

The calculation unit 4 takes in the tooth groove data measured by the tooth groove measuring element 2 and the large diameter measuring element 3 and the large diameter data of the tooth tip of the tooth profile part W, and uses the measured value of the large diameter measuring element 3. The rotational deviation of the tooth profile part W is calculated, the rotational deviation of the calculated tooth profile part W is corrected by adding and subtracting the calculated rotational deviation of the tooth profile part W to the value measured by the tooth groove probe 2, and the runout of the tooth groove is calculated. . Further, the calculation unit 4 outputs a measurement error when the calculated rotation deviation amount of the tooth profile component is equal to or larger than a predetermined value.

The chuck portion 1 has been described by way of an example in which it is manually rotated in the case of this embodiment, but the invention is not limited to this. For example, the rotary shaft 12 is connected to a servomotor, and the tooth profile part W is formed. When the contact piece 2a of the tooth groove measuring element 2 is brought into contact with the tooth groove of, the contact piece 2a is in a freely rotatable state so as to come into contact with both tooth surfaces of the tooth groove, and the next tooth groove and tooth tip are measured. At times, it is also possible to rotate the tooth profile part W by a servomotor.

Further, the tooth space probe 2 and the large diameter probe 3
In the present embodiment, an example using a displacement sensor has been described, but the present invention is not limited to this, and a mechanical measuring device such as a dial gauge is used to input the measured value to the calculation unit. You can also do it. Further, in the case of this embodiment, the case where one tooth groove measuring element 2 and one large diameter measuring element 3 are provided has been described, but the tooth groove measuring device according to the present invention is not limited to this. It is also possible to provide a plurality of tooth space measuring elements 2 and a large diameter measuring element 3 according to the module of the tooth profile component. As described above, when the plurality of tooth groove measuring elements 2 and the large diameter measuring element 3 are provided, it is possible to improve the efficiency such as time and labor for measuring the tooth groove of the tooth profile part.

Next, an embodiment of the method for measuring tooth groove runout according to the present invention will be described in detail with reference to FIGS. As shown in the flowchart in FIG. 3, first, the number of teeth (n) of the tooth profile part W is input (step S
1) Input the set value (s) of the rotational deviation amount of the tooth profile part W (step S2). Then, when the measurement is started (step S3), the contact piece 2a of the tooth groove measuring element 2 comes into contact with the tooth groove A ₁ and the contact piece 3a of the large diameter measuring element ₃ comes into contact with the tooth groove B ₃ . Then, the measured value of the displacement amount of the contact piece 2a of the tooth groove probe 2 is taken in as tooth groove data (step S
4), the measured value of the displacement amount of the contact piece 3a of the large-diameter probe 3 is taken in as the large diameter data of the tooth tip (step S5), and the tooth profile part W is rotated by one pitch (step S6). Next, the contact pieces 2a, 3a are retracted, the tooth-shaped component W is rotated, the contact pieces 2a, 3a are brought into contact with the next tooth groove, and steps S4 to S6 are repeated. In this way, steps S4 to S6 are repeated to measure the number of teeth n, and all tooth space data and large diameter data are captured. FIG. 4 is a graph of tooth gap data showing the measurement result of the stroke amount (displacement amount) of the contact piece 2a of the tooth gap measuring element 2 with respect to each tooth gap, and FIG.
It is a graph of the large diameter data which showed the measurement result of the stroke amount (displacement amount) of the contact piece 3a of the large diameter probe 3 with respect to each tooth tip.

In step S7, as shown in FIG. 7, a sine that approximates the rotational deviation of the tooth profile part W based on the large diameter data of each tooth tip of FIG. 6 obtained by the large diameter probe 3 is obtained. Obtain the curve, and as an approximate value of rotational deviation corresponding to each tooth space,
The stroke amount when the sine curve intersects the position corresponding to each tooth groove is calculated. Next, each rotational deviation approximate value is subtracted from the stroke amount (large diameter data) of the contact piece 3a of the large diameter probe 3 with respect to each tooth tip (step S8), and each rotational deviation approximate value is subtracted. The maximum value MAX is obtained from these (step S9). Then, in this embodiment, the set value (s) of the rotational deviation amount of the tooth-shaped component W is 25 μm.
m. In step S10, it is determined whether or not the value of the maximum rotational deviation MAX is smaller than 25 μm. If the maximum value of the rotational deviation MAX is smaller than the set value (s) = 25 μm, it is determined from each tooth groove data. The tooth groove data is corrected by subtracting each rotational deviation approximate value (step S11), and the maximum value δmax and the minimum value δmin are obtained from the corrected tooth groove data (step S11).
12), the maximum value δmax and the minimum value δmin
Is output as a shake value (step S13), and the calculation ends (step S14). As shown in FIG. 7, since the value obtained by subtracting the value of the sine curve calculated as the rotational deviation from the measured value of each tooth groove of the toothed part W is calculated, the rotational deviation of the toothed part W is affected. Without, it is possible to accurately measure the runout of the tooth space.

In step S10, the maximum value of the rotational deviation MAX is the set value (s) of the rotational deviation amount of the toothed part W (s) = 25.
If it is larger than μm, the rotation deviation amount of the tooth-shaped component W is too large and the correction cannot be properly performed, and an error message is output (step S15), and the calculation is ended without outputting the shake value. (Step S14).

In the tooth groove runout measuring method according to the present invention, the contact pieces 2a and 3a of the tooth groove probe 2 and the large diameter probe 3 are measured by using the tooth groove runout measuring apparatus according to the present invention. Although the description has been given of the embodiment in which the runout of the tooth space is measured by making contact with the tooth space and the tip of the tooth space, respectively, the contact of the single contact point 5 as shown in FIG. 8 is not limited to this. It is needless to say that the operation can also be performed by bringing the piece 5a into contact with the tooth gap and the tooth tip of the tooth profile component, respectively, and taking in the tooth gap data and the large diameter data for calculation.

[0027]

According to the first aspect of the invention configured as described above, the rotational deviation of the tooth profile part calculated from the measurement value of the large diameter probe is corrected to the value measured by the tooth groove probe. Since the runout of the tooth space is calculated, it is possible to provide a runout measuring device for a tooth space that can accurately measure the runout of the tooth space of the tooth profile component. Further, according to the first aspect of the present invention, it is possible to provide a tooth groove deviation measuring device having a simple and inexpensive structure and capable of measuring the tooth groove deviation of a tooth profile component that is easy to measure.

According to the second aspect of the invention configured as described above, the rotational displacement amount of the tooth profile part is calculated from the displacement amount of the contact piece with respect to all tooth tips, and the tooth gap is calculated based on the rotational displacement amount of the tooth profile part. Since the tooth groove deviation is calculated by correcting the measured value of the tooth groove, a tooth groove deviation measuring method capable of accurately measuring the tooth groove deviation without being affected by the rotational deviation of the tooth profile part is provided. be able to.

Further, according to the third aspect of the present invention configured as described above, since a measurement error is output when the rotational deviation amount of the tooth profile part exceeds a predetermined value, the reliability of the measurement of the tooth groove runout is improved. It is possible to provide a method for measuring runout of a tooth space that can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a tooth groove deflection measuring device according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a flowchart showing an embodiment of a tooth groove runout measuring method according to the present invention.

FIG. 4 is a graph of tooth gap data showing the measurement result of the stroke amount (displacement amount) of the contact piece of the tooth gap measuring element with respect to each tooth gap.

FIG. 5 is a graph of tooth groove data showing the measurement result of the stroke amount (displacement amount) of the contact piece of the large-diameter probe with respect to each tooth tip.

FIG. 6 is a graph showing a state in which a sine curve approximating the graph of FIG. 5 is superimposed and drawn.

FIG. 7 is a graph showing a state in which the approximate sine curve of FIG. 6 is drawn on the measurement result of the stroke amount (displacement amount) of the contact piece of the tooth groove measuring element with respect to each tooth groove of FIG. 4.

FIG. 8 is a partial view showing a state in which the runout of a tooth space is measured using a conventional single probe.

[Description of sign]

 1 Chuck part 2 Tooth groove probe 2a Contact piece 3 Large diameter probe 3a Contact piece 4 Calculation part W Tooth profile part Wa hole

Claims (3)

[Claims] 1. A chuck part for rotatably holding a tooth profile part having a tooth groove, a tooth groove measuring element having a contact piece for contacting the tooth groove of the tooth profile part, and a contact piece for contacting the tip of the tooth profile part. A large-diameter measuring element having, and a calculation unit for calculating the rotational deviation of the tooth profile part based on the measurement value of the large-diameter measuring point and correcting the calculated rotational deviation of the tooth profile part to calculate the tooth groove runout. A tooth groove runout measuring device comprising: 2. A contact piece for a contact point of a tracing stylus is sequentially contacted with a tooth groove and a tooth tip of a tooth-shaped component rotatably held, and a displacement amount of the contact piece of the tracing stylus is measured. Of the tooth profile part, the rotational deviation of the tooth profile part is calculated, and the runout of the tooth groove is calculated by correcting the rotational deviation of the tooth profile part. 3. The tooth groove runout measuring method according to claim 2, wherein a measurement error is output when the calculated rotational deviation amount of the tooth profile part is equal to or more than a predetermined value.