JP2004025333A - Gear working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gear working machine capable of easily and precisely detecting the teeth of a work without applying a load to the rotation transmitting system of the machine, and properly performing the rotating phase matching of the work to a hob based on the detection result. <P>SOLUTION: When the work 35 consisting of a roughly toothed workpiece gear is finished by the hob 27, prior to the meshing of the cutting teeth 27a of the hob 27 to the tooth space 35a the work 35, the teeth of the work 35 are detected by a sensor 36 in the state where the work 35 is continuously rotated in one direction. The pitch and position of teeth of the work 35 are determined based on the detection data from the sensor 36, and the rotating phase of either one of the work 35 and the hob 27 is corrected based on the determination result to mutually match the rotating phases of the both. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear processing machine such as a hobbing machine that can finish a workpiece made of a gear to be processed after rough tooth cutting with a cutter such as a hob.
[0002]
[Prior art]
Generally, in a hobbing machine, which is a gear processing machine of this kind, at the time of finishing work of a workpiece, prior to meshing a cutting tooth of the hob with a tooth groove of the work, a phase in a rotational direction of the hob is detected. In order to correct the phase shift, it was necessary to correct the rotational phase between the hob and the work.
[0003]
As a method of detecting the rotational phase of a work in such a gear machining machine, a method disclosed in, for example, Japanese Patent No. 3129923 is conventionally known. In this conventional detection method, as shown in FIG. 17, first, a non-contact type sensor 51 is disposed opposite to one tooth groove 53a of the work 53 on the creation center L1 between the hob 52 and the work 53.
[0004]
In this state, the workpiece 53 is rotated clockwise at a low speed by a predetermined angle (approximately one tooth), and the sensor 51 detects an intersection p1 of the tooth groove 53a on one specific tooth surface on the specific detection circle line L2. Then, the coordinate value (rotation angle) θ1 is read. Subsequently, the work 53 is rotated counterclockwise at a low speed by a predetermined angle, and an intersection p2 of the tooth groove 53a with the opposite tooth surface on the detection circle line L2 is detected by the sensor 51, and its coordinate value (rotation) Angle) θ2.
[0005]
After that, when θ1> θ2, the deviation of the center position of the tooth groove 53a with respect to the creation center L1, that is, the corrected rotation angle Cθ is obtained by the arithmetic expression of θ1−θ2 = Cθ. Then, the hob 52 and the work 53 are corrected and rotated by the corrected rotation angle Cθ so that their rotation phases are matched.
[0006]
[Problems to be solved by the invention]
However, in this conventional gear processing machine, since the rotation direction of the work 53 is reversed to detect the positions of the tooth surfaces on both sides of the tooth groove 53a, the detection operation is troublesome and time-consuming. there were.
[0007]
Further, in this conventional gear processing machine, since the coordinate values of some of the tooth grooves 53a are read without detecting the tooth grooves 53a over the entire circumference of the work 53, the position detection is performed with high accuracy. There was a problem that it could not be performed accurately.
[0008]
In order to cope with such an accuracy problem, for example, after detecting at one tooth groove 53a of the work 53, the work 53 is rotated by 180 degrees, and the tooth groove at a position opposite to the first detected position is rotated. A method of performing detection at 53a is also conceivable. However, when detection is performed at a plurality of locations as described above, there is a new problem that the detection operation becomes more complicated and takes longer time.
[0009]
Further, in the conventional gear processing machine, since the detection is performed by reversing the work 53 in the clockwise direction and the counterclockwise direction, a load is applied to the rotation transmission system of the work 53, and the processing accuracy or durability of the machine is increased. There is a problem that it causes a decrease in
[0010]
The present invention has been made by paying attention to the problems existing in such a conventional technique. The purpose is to be able to easily and accurately detect the teeth of the work without placing a burden on the rotation transmission system of the machine, and to properly adjust the rotation phase between the work and the cutter based on the detection result. It is an object of the present invention to provide a gear processing machine capable of performing the following.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 is a gear processing machine for finishing a workpiece made of a gear having been subjected to rough gear cutting with a cutter, wherein the cutting teeth of the cutter and the teeth of the workpiece are processed. Prior to engagement with the groove, detection means for detecting the teeth of the work while the work is continuously rotated in one direction, and determination for determining the position of the teeth of the work based on the detection data from the detection means Means, and a correcting means for correcting the rotational phase of at least one of the workpiece and the cutter based on the result of the determination by the determining means, and for matching the rotational phases thereof. .
[0012]
Therefore, according to the first aspect of the present invention, the teeth of the work can be easily and accurately detected over the entire circumference by the sensor while the work is continuously rotated in one direction. Therefore, the rotational phase of the work and the cutter can be properly adjusted based on the detection result. In addition, since the detection is performed by continuously rotating the work in one direction without reversing the rotation direction of the work, it is possible to prevent the load on the rotation transmission system of the machine and to reduce the possibility of lowering the processing accuracy. .
[0013]
According to a second aspect of the present invention, in the first aspect of the present invention, an outer diameter detecting means for detecting an outer diameter of the work, and when a detection result of the outer diameter detecting means deviates from a prescribed value, the detection is performed. And an informing means for informing.
[0014]
Therefore, according to the second aspect of the present invention, when a work composed of gears having different outer diameters is set by mistake, it can be detected and immediately notified.
[0015]
According to a third aspect of the present invention, in the first or second aspect, the number of teeth detecting means for detecting the number of teeth of the workpiece and the detection result of the number of teeth detecting means deviate from a specified value. And a notifying means for notifying the case.
[0016]
Therefore, according to the third aspect of the present invention, when a work including gears having different numbers of teeth is set by mistake, it can be detected and promptly notified.
[0017]
According to a fourth aspect of the present invention, in the first aspect of the present invention, the lead detecting means for detecting a lead of the work and a detection result of the lead detecting means are defined. And a notifying means for notifying a value deviating from the value.
[0018]
Therefore, according to the fourth aspect of the present invention, when a work composed of gears having different leads with different leads is set by mistake, it can be detected and immediately notified.
[0019]
The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the work and the detection according to any one of claims 1 to 4 are described. An adjusting means for adjusting a gap between the means and the means is provided.
[0020]
Therefore, according to the fifth aspect of the present invention, the detection means can be adjusted and disposed at an appropriate detection position with respect to the workpiece, and the detection accuracy can be improved.
According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, prior to the engagement between the cutting teeth of the cutter and the tooth grooves of the work, the cutting reference of the cutter is set. It is characterized in that setting means for setting the position is provided.
[0021]
Therefore, according to the sixth aspect of the present invention, by setting the cutting reference position in advance without detecting the position of the cutting teeth of the cutter, the rotational phase of the workpiece and the cutter can be easily adjusted. And can be done quickly.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
(1st Embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0023]
As shown in FIGS. 1 and 2, in this gear processing machine (hobbing machine in this embodiment), a column 22 is supported on the upper side of one side of a bed 21 so as to be movable in the X direction. Is moved by A saddle 24 is supported on the side surface of the column 22 so as to be movable in the Z direction, and is moved by a Z direction moving motor 25. A hob head 26 is provided on the saddle 24 so that the angle can be changed, and the angle is changed by an angle changing mechanism (not shown). A hob shaft 28 for mounting a hob 27 as a cutter is rotatably supported on the hob head 26, and is rotated by a hob rotation motor 29.
[0024]
A work table 30 is rotatably disposed on the other upper side of the bed 21 and is rotated by a work rotation motor 31. A work holding jig 32 is provided on the work table 30, and a work chuck portion 32a such as a collet chuck is provided at an upper end thereof. A column 33 is provided upright on the other side of the bed 21, and a support arm 34 having a support center 34 a is provided on a side surface thereof so as to be movable in the Z direction. A work 35 made of a gear having been subjected to the coarse gear cutting is detachably attached to a work chuck portion 32a of a work holding jig 32 at a lower end, and is supported by a support center 34a at an upper end. I have.
[0025]
In this state, when finishing the teeth of the work 35, the column 22 is moved closer to the work 35 by the X-direction moving motor 23, and the cutting teeth 27 a of the hob 27 and the tooth grooves 35 a of the work 35 are separated. Be engaged. Then, while the work 35 is rotated by the work rotation motor 31 and the hob 27 is rotated by the hob rotation motor 29, the work 35 is fed by the Z-direction movement motor 25 in the axial direction of the work 35 or in a predetermined angle direction with respect to the axial line. Is done. As a result, the teeth of the work 35 are subjected to finish processing by the gear generation method.
[0026]
Next, a configuration for correcting the rotational phase of the hob 27 and the work 35 prior to the engagement between the cutting teeth 27a of the hob 27 and the tooth grooves 35a of the work 35 at the time of finishing the work 35 will be described.
[0027]
As shown in FIGS. 2 and 3, a non-contact type sensor 36 is supported by the hob head 26 via a guide structure (not shown) so as to be movable substantially in the Y direction. A sensor moving cylinder 37 is disposed on the hob head 26, and the sensor rod is supported by the sensor 36 on the sensor rod 36. As a result of the switching operation of the cylinder 37, the sensor 36 is separated from the detection position P1 on the creation center L1 between the hob 27 and the work 35, as shown by a chain line and a solid line in FIGS. It is arranged to be moved to the retreat position P2.
[0028]
In this embodiment, the X-direction moving motor 23 constitutes an adjusting means for adjusting a gap between the workpiece 35 and the sensor 36. When the column 22 is moved toward the work 35 by the X-direction moving motor 23 in a state where the sensor 36 is moved to the detection position P1, the gap between the work 35 and the sensor 36 is adjusted. , Sensor 36 is arranged at an appropriate detection position.
[0029]
Further, in this embodiment, the sensor 36 detects the teeth of the work 35 by the sensor 36, the outer diameter detecting means detects the outer diameter of the work 35, the number of teeth detecting means detects the number of teeth of the work 35, The lead detecting means for detecting the lead of the work 35 is also used. Then, while the sensor 35 is adjusted and arranged at the proper detection position, the workpiece 35 is continuously rotated in one direction by the workpiece rotation motor 31, and the sensor 36 detects the teeth, the outer diameter, the number of teeth, and the lead of the workpiece 35. Detection is performed.
[0030]
Next, a circuit configuration for adjusting the rotational phases of the workpiece 35 and the hob 27 based on the detection data from the sensor 36 will be described. As shown in FIG. 4, the control device 38 stores data of a program for controlling the operation of the entire gear processing machine including the rotational phase adjustment. A memory 39 is connected to the control device 38. This memory 39 stores input data of tooth position detection data of the work 35, the cutting reference position of the hob 27, the outer diameter of the work 35, the number of teeth, and the lead. Area is provided. The cutting reference position of the hob 27 refers to the position of the hob 27 when one predetermined incision 27a on the hob 27 is arranged at the center of creation with respect to the workpiece 35, and One incisor 27a is used as a reference tooth.
[0031]
The control device 38 is connected with the phase detection sensor 36, a rotation angle sensor 40 for detecting the rotation angle of the work 35, a position detection switch 41 for detecting the rotation position of the work 35, and an input key 42 as setting means. Have been. The control device 38 constitutes a determination unit and a correction unit, and when the detection data of the teeth of the work 35 is input from the sensor 36, determines the phase, that is, the pitch and the position of the teeth of the work 35 based on the detection data. . At the same time, the rotational phase of at least one of the work 35 and the hob 27 is corrected based on the result of the determination, and the rotational phases are made to match. When inputting the position data of the cutting teeth 27a of the hob 27 and various data such as the outer diameter, the number of teeth and the lead of the work 35 from the input keys 42, the control device 38 is based on the position data of the cutting teeth 27a. After calculating the cutting reference position, the cutting reference position data and various data of the work 35 are stored in a predetermined area of the memory 39.
[0032]
The control device 38 includes a switching valve 43 of a sensor movement cylinder 37, the hob rotation motor 29, a work rotation motor 31, an X direction movement motor 23, a Z direction movement motor 25, and an alarm as a notification means. 44 are connected. Then, the control device 38 outputs a drive signal to the switching valve 43 and each of the motors 29, 32, 23, 25 when the sensor 36 detects and when the rotational phases of the work 35 and the hob 27 are matched. When inputting the detection data of the outer diameter, the number of teeth, and the lead of the work 35 from the sensor 36, the control device 38 compares the detection data with a specified value stored and set in the memory 39. Then, when the detected data deviates from the specified value, the alarm 44 is operated to notify the user and the operation of the entire gear processing machine is stopped.
[0033]
Next, the operation of the gear processing machine configured as described above will be described.
Now, in this gear processing machine, when finishing work by the hob 27 in a state where the work 35 formed of the gear to be processed which has been subjected to the coarse gear cutting is mounted on the work holding jig 32, as shown in FIG. First, the position of the cutting teeth 27a of the hob 27 is set (step S1). Subsequently, the work 35 and the hob 27 are synchronously rotated by the work rotation motor 31 and the hob rotation motor 29 (step S2), and the sensor 36 is moved from the retreat position P2 to the detection position P1 by the sensor movement cylinder 37. It is moved (step S3).
[0034]
In this state, based on the detection data from the sensor 36, the outer diameter of the work 35 is checked (step S4), the gap between the work 35 and the sensor 36 is set (step S5), and the number of teeth of the work 35 is checked (step S5). S6) is performed in order. Subsequently, the rotational phases of the work 35 and the hob 27 are matched (step S7), and the lead check of the work 35 (step S8) is performed.
[0035]
As described above, when the operation such as the rotation phase adjustment is completed, the sensor 36 is moved from the detection position P1 to the retreat position P2 by the sensor movement cylinder 37 (step S9). Thereafter, the work rotation motor 31 and the hob rotation motor 29 are set to the processing rotation speed (step S10), and in this state, the teeth of the work 35 are finished by the gear generation method by the synchronous rotation of the work 35 and the hob 27. It is processed (step S11).
[0036]
Next, it is determined whether or not the processing on one workpiece 35 has been completed (step S12). When the processing on one workpiece 35 has been completed, it is determined whether or not the entire processing on a predetermined number of workpieces 35 has been completed. Is performed (step S13). If the entire machining operation has not been completed, the work 35 is detached and replaced from the work holding jig 32 (step S14). Thereafter, the process returns to step S2, and the operations of steps S2 to S13 are repeated. Be executed.
[0037]
Next, the operations in the subroutines of steps S1 and S4 to S8 will be described in more detail.
First, in the subroutine for setting the positions of the cutter incisors, it is determined whether or not the hob 27 is mounted on the hob shaft 28 as shown in FIG. 6 (step S15). This determination is made based on the detection of a sensor (not shown). Then, after the installation of the hob 27 is confirmed, the position data of the cutting teeth 27a of the hob 27 and various data such as the outer diameter, the number of teeth, and the lead of the work 35 are manually input from the input keys 42 (step S16). . Then, a cutting reference position is calculated based on the position data of the cutting teeth 27a (step S17), and the cutting reference position data is stored in a predetermined area of the memory 39 together with various data on the work 35 (step S18).
[0038]
In the subroutine for checking the outer diameter of the work 35, as shown in FIG. 7, the column 22 is moved toward the work 35 at a rapid traverse speed by the X-direction moving motor 23, and the sensor 36 at the detection position P1 is moved. Step feed is performed to a position separated by 5 mm from 35 (step S19). Thereafter, the moving speed of the sensor 36 is switched to the slow feed speed (step S20), and it is determined whether or not the sensor 36 is turned on in this feed state (step S21).
[0039]
Then, when the sensor 36 is turned on, it is determined whether or not the gap between the sensor 36 and the work 35 is equal to or larger than a predetermined value (1.5 mm in this embodiment) (step S22). The gap between the sensor 36 and the work 35 is determined based on the difference between the distance from the movement start point of the sensor 36 to the work 35 and the movement amount from the movement start point of the sensor 36 to the ON point. . In this determination, if the outer diameter of the work 35 is smaller than the predetermined size and the gap is 1.5 mm or more, an alarm is activated to notify the state (step S23), and the operation of the machine is stopped. The operation is stopped (step S24).
[0040]
On the other hand, if it is determined in step S22 that the gap is not larger than 1.5 mm, it is determined whether the gap is smaller than 0.1 mm (step S25). If the outer diameter of the work 35 is larger than the predetermined size and the gap is 0.1 mm or less, an alarm is activated to notify the state (step S23) and the operation of the machine is stopped. Is performed (step S24). Therefore, it is possible to easily check that the work 35 having the different outer diameter is incorrectly mounted on the work holding jig 32.
[0041]
Further, in a subroutine for setting a gap between the work 35 and the sensor 36, as shown in FIGS. 8 and 9, the sensor 36 reads edge data of the teeth of the work 35 (step S26). Then, it is determined whether or not the on / off pitch intervals d1 and d2 of the edge portion data are equal (step S27). If the pitch intervals d1 and d2 are not equal, the sensor 36 is detected by the X-direction moving motor 23. Is moved to adjust the gap between the work 35 and the sensor 36 (step S28). As a result, the sensor 36 is disposed at an appropriate detection position with respect to the work 35.
[0042]
Equalizing the on / off pitch intervals d1 and d2 of the data is to minimize the detection time and to perform the detection efficiently. That is, the time interval at which the control device 38 can detect the rise or fall of the pulse is determined. For this reason, if the data on / off pitch intervals d1 and d2 are different, the detectable time interval must be adjusted to the shorter pitch interval d1 and d2, and the longer pitch interval d1 and d2 can be detected. Longer time interval. Therefore, if the data on / off pitch intervals d1 and d2 are different, the total detection time becomes longer as a result.
[0043]
Subsequently, in the subroutine for checking the number of teeth of the work 35, as shown in FIG. 10, first, it is determined whether or not the pitch intervals d1 and d2 of the on / off of the edge data from the sensor 36 are equal (step). S29). If the pitch intervals d1 and d2 are not equal, the sensor 36 is moved as described above, and the gap between the workpiece 35 and the sensor 36 is adjusted (step S30).
[0044]
Thereafter, the detection data of the teeth for one round of the work 35 is obtained from the sensor 36 (step S31), and it is determined whether the number of teeth based on the detection data matches the specified number of teeth stored in the memory 39 or not. (Step S32). If the numbers of teeth do not match, an alarm is activated to notify the state (step S33), and the operation of the machine is stopped (step S34). Therefore, it is possible to easily check that the work 35 having a different number of teeth is erroneously mounted on the work holding jig 32.
[0045]
In the subroutine for adjusting the rotational phase of the work 35 and the hob 27, as shown in FIG. 11, it is first determined whether or not the pitch intervals d1 and d2 of the on / off of the edge data from the sensor 36 are equal. (Step S35). If the pitch intervals d1 and d2 are not equal, the sensor 36 is moved in the same manner as described above, and the gap between the work 35 and the sensor 36 is adjusted (step S36).
[0046]
Thereafter, as shown in FIGS. 11 and 12, a mode for acquiring only rising data among the data detected from the sensor 36 is set (step S37). In this setting state, the coordinates of the work 35 at the time of rising, that is, the rotation angle of the work 35 from the rotation start position are read, and the data is stored in the memory 39 (step S38). Then, the first data read first is unstable and is deleted (step S39), and the average value of the coordinates corresponding to the second and third data is obtained (step S40). The average value is set as a reference value (Step S41).
[0047]
Subsequently, the setting of the mode for acquiring only the rising data is canceled (step S42). In this state, edge data of the teeth of the work 35 is obtained from the sensor 36 (step S43), and the position of the tooth groove 35a of the work 35 is obtained based on the edge data and the reference value (step S44). ). Then, based on the position data of the tooth space 35a and the cutting reference position data of the hob 27 stored in the memory 39, it is determined whether or not the rotational phases of the work 35 and the hob 27 match (step). S45). If the rotation phases do not match, the rotation speed of at least one of the work rotation motor 31 and the hob rotation motor 29 is changed so that the rotation phases of the work 35 and the hob 27 match. The correction is made (step S46). When the rotation phases match, the rotation speed of the work 35 and the hob 27 becomes a speed suitable for machining.
[0048]
Next, in the subroutine of the lead check of the work 35, after the detection data of the teeth of the work 35 is acquired by the sensor 36 at the predetermined detection position in the axial direction of the work 35 as described above, as shown in FIG. The sensor 36 is moved in the axial direction of the work 35 by the Z-direction moving motor 25 (step S47). Thereby, the sensor 36 is arranged at a different detection position in the axial direction with respect to the workpiece 35. In this state, the detection data of the teeth of the work 35 is obtained by the sensor 36 (step S48), and the difference between the detection data and the previously obtained detection data is calculated (step S49).
[0049]
Then, it is determined whether or not the difference between the detected data, that is, the presence or absence of the shift amount of the lead of the work 35 or whether the value of the shift amount is within the allowable range of the specified read value stored in the memory 39 (step S50). . If it is not within the allowable range, an alarm is activated to notify the state (step S51), and the operation of the machine is stopped (step S52). Therefore, it is possible to easily check that the work 35 having a different lead is erroneously mounted on the work holding jig 32. The check of the lead may be performed by calculating the amount of deviation of the regular lead in the control device 38 and comparing the calculated value with the calculated value.
[0050]
Therefore, according to this embodiment, the following effects can be obtained.
(1) In this gear machining machine, when the work 35 composed of the gear to be machined after the coarse gear cutting is finished by the hob 27, the cutting teeth 27a of the hob 27 engage with the tooth grooves 35a of the work 35. Prior to this, the teeth of the work 35 are detected by the sensor 36 while the work 35 is continuously rotated in one direction. Further, based on the detection data from the sensor 36, the control device 38 determines the pitch and position of the teeth of the work 35. Then, based on the determination result, the control device 38 corrects at least one of the rotational phases of the work 35 and the hob 27 so that the rotational phases of the work 35 and the hob 27 match.
[0051]
Therefore, the teeth of the work 35 can be easily and accurately detected over the entire circumference by the sensor 36 while the work 35 is continuously rotated in one direction. Therefore, the rotational phases of the work 35 and the hob 27 can be properly adjusted based on the detection result. Further, since the detection is performed by continuously rotating the work 35 in one direction without reversing the rotation direction of the work 35, a load is not applied to the rotation transmission system of the machine, and the processing accuracy and durability are reduced. The fear can be prevented.
[0052]
(2) In this gear processing machine, when detecting the teeth of the work 35, the sensor 36 detects the outer diameter of the work 35, and when the detection result deviates from a specified value, an alarm 44 informs the state. And the machine is stopped. Therefore, when a work 35 composed of gears having different outer diameters is set by mistake, the state can be quickly detected, and the possibility that the work 35 is erroneously machined can be reliably determined. Can be prevented.
[0053]
(3) In this gear processing machine, when detecting the teeth of the work 35, the number of teeth of the work 35 is detected by the sensor 36, and when the detection result deviates from a specified value, the alarm 44 informs the state. And the machine is stopped. Therefore, when a work 35 including a gear to be machined having a different number of teeth is set by mistake, the state can be quickly detected, and the possibility that the work 35 is erroneously machined can be reliably determined. Can be prevented.
[0054]
(4) In this gear machining machine, when detecting the teeth of the work 35, the lead of the work 35 is detected by the sensor 36, and when the detection result is out of the specified value, the alarm 44 notifies the state thereof. At the same time, the machine is stopped. For this reason, when a work 35 made of a gear to be machined having a different lead is set by mistake, the state can be promptly detected, and the possibility that the work 35 is erroneously machined can be reliably determined. Can be prevented.
[0055]
(5) In this gear machining machine, when detecting the teeth of the work 35, the sensor 36 is moved toward the work 35 by the X-direction moving motor 23, and based on the control of the control device 38, The gap between the sensor 36 and the sensor 36 is adjusted. For this reason, the sensor 36 can be adjusted and arranged at an appropriate detection position with respect to the workpiece 35, and the detection accuracy can be improved.
[0056]
(6) In this gear processing machine, a cutting reference position of the hob 27 is set based on input data from the input key 42 before the cutting teeth 27a of the hob 27 engage with the tooth grooves 35a of the work 35. It has become so. For this reason, it is possible to input and set the cutting reference position in advance without detecting the position of the cutting teeth 27a of the hob 27, and to easily and quickly adjust the rotational phase of the work 35 and the hob 27. be able to.
[0057]
(2nd Embodiment)
Next, a second embodiment of the present invention will be described focusing on parts different from the first embodiment.
[0058]
In the second embodiment, as shown in FIGS. 14 and 15, in addition to the non-contact sensor 36 similar to the first embodiment, a contact sensor 47 is provided. After the teeth of the work 35 are detected by the non-contact sensor 36 while the work 35 is continuously rotated in one direction, the work 35 is reciprocated by a predetermined angle (within one tooth), and the contact sensor 47 is rotated. Thereby, the tooth space 35a of the work 35 is detected.
[0059]
That is, in the gear processing machine of this embodiment, as shown in FIG. 15, first, the work 35 and the hob 27 are synchronously rotated (step S53). In this state, the non-contact sensor 36 is moved from the retreat position P2 to the detection position P1 (step S54), and the non-contact sensor 36 acquires position data of the teeth of the work 35 (step S55). After that, the non-contact sensor 36 is moved from the detection position P1 to the retreat position P2, and the rotation of the work 35 and the hob 27 is stopped (step S56). Here, the moving speed of the non-contact type sensor 36 from the retreat position P2 to the detection position P1 is determined by the time between when the non-contact type sensor 36 detects one tooth and when the next tooth approaches. The speed is such that it does not enter the groove 35a. If the non-contact sensor 36 does not detect a tooth even when the non-contact sensor 36 approaches a position (for example, 0.1 mm) at a predetermined distance from the outer periphery (the position of the tooth tip surface) of the work 35, the non-contact sensor 36 Is stopped and an alarm is issued.
[0060]
Next, the contact sensor 47 is moved from the retracted position to the detection position in the tooth space (step S57). In this state, the work 35 is reciprocated clockwise and counterclockwise by a predetermined angle (within one tooth) (step S58), and the tooth surface comes into contact with the detector 47a of the contact type sensor 47. The position data of the 35 tooth space 35a is obtained (step S59). Then, the rotational phase, that is, the pitch and the position of the work 35 are determined based on the data acquired by the sensors 36 and 47 (step S60), and the work 35 is determined based on the determination result and the cutting reference position data of the hob 27. The rotational phase between the motor and the hob 27 is corrected (step S61). Therefore, as shown in FIG. 14, even when burrs 48 are generated at the tooth tips of the work 35 in the coarse gear cutting, the rotational phase of the work 35 can be accurately determined based on the detection data of the sensors 36 and 47. Can be determined.
[0061]
Therefore, according to the second embodiment, the following effects can be obtained in addition to the effects (1) to (6) in the first embodiment.
(7) In the gear processing machine of this embodiment, the teeth of the workpiece 35 are detected by the non-contact type sensor 36 and the contact type sensor 47. For this reason, when the burr 48 is generated on the tooth tip of the work 35, the rotational phase is roughly detected by the non-contact type sensor 36, and then the tooth surface is detected by the contact type sensor 47. Then, the rotational phase of the work 35 can be accurately determined based on the detection data from the contact sensor 47, and the rotational phase of the work 35 and the hob 27 can be properly adjusted.
[0062]
(Third embodiment)
Next, a third embodiment of the present invention will be described focusing on parts different from the first embodiment.
[0063]
In the third embodiment, as shown in FIG. 16, a first gear portion 49a and a second gear portion 49b are formed on a work 49 with their teeth having a predetermined positional relationship. Here, the present invention is applied to a case where the first gear portion 49a and the second gear portion 49b are formed in a state shifted by a half pitch. That is, at the time of finishing after the coarse gear cutting of the first gear portion 49a, the teeth of the first gear portion 49a are detected by the sensor 36 in the same manner as in the first embodiment, and the first gear portion 49a is detected based on the detection data. The rotation phase of the portion 49a is determined. The result of the determination of the rotational phase of the first gear 49a is stored in the memory 39, and the rotational phase of the work 35 and the hob 27 is adjusted based on the result of the determination.
[0064]
Further, when the second gear portion 49b is subjected to the coarse gear cutting after the finish processing of the first gear portion 49a, the rotational phase data of the first gear portion 49a is read from the memory 39. Then, based on the rotation phase data of the first gear portion 49a, the rough gear cutting of the second gear portion 49b is performed in a state shifted by a half pitch.
[0065]
Therefore, according to the third embodiment, the following effects can be obtained in addition to the effects (1) to (6) in the first embodiment.
(8) In the gear machining machine of this embodiment, when two gear portions 49a and 49b are formed on the work 49 so that their teeth have a predetermined positional relationship, when one of the gear portions 49a is subjected to finish machining. On the basis of the obtained rotational phase, the other gear portion 49b is subjected to rough gear cutting. Therefore, the two gear portions 49a and 49b can be accurately formed on the work 49 so that they have a predetermined positional relationship. In particular, in the case where the second gear portion 49b is rough-geared after the first gear portion 49a is finished on the same worktable 30 of the gear processing machine, the rotational phase data can be effectively used. .
[0066]
(Example of change)
This embodiment can be embodied with the following changes.
In each of the above-described embodiments, the sensor 36 is disposed on the column 33 side so as to be movable between a detection position approaching the work 35 at a predetermined interval and a retracted position separated therefrom.
[0067]
In each of the above embodiments, the sensor for detecting the outer diameter, the number of teeth, and the lead of the work 35 is provided separately without also serving as the sensor 36 for detecting the teeth of the work 35.
[0068]
In the above embodiments, the cutting reference position of the hob 27 is determined based on the detection of the cutting teeth of the hob 27 by the sensor without setting the data by inputting data.
[0069]
-The present invention is embodied in a gear processing machine other than the hobbing machine.
[0070]
【The invention's effect】
As described above, as exemplified in the embodiment, the present invention can easily and accurately detect the teeth of a work without imposing a load on a rotation transmission system of a machine, and can detect a work and a cutter based on the detection result. An excellent effect that the rotational phase can be properly adjusted with the above.
[Brief description of the drawings]
FIG. 1 is a front view showing a gear processing machine according to a first embodiment.
FIG. 2 is a schematic plan view showing a drive configuration of the gear machining machine of FIG.
FIG. 3 is an enlarged plan view of a main part showing a phase detection configuration of the gear machining machine of FIG. 1;
FIG. 4 is a block diagram showing a circuit configuration of a phase matching relationship of the gear processing machine of FIG. 1;
FIG. 5 is a flowchart showing an operation including a phase adjustment of the gear processing machine of FIG. 1;
FIG. 6 is a flowchart showing a subroutine for setting a hob incisor position.
FIG. 7 is a flowchart showing a subroutine of outer diameter check.
FIG. 8 is a flowchart showing a subroutine for setting a gap.
FIG. 9 is an explanatory diagram illustrating an operation of setting a gap in FIG. 8;
FIG. 10 is a flowchart showing a subroutine for checking the number of teeth.
FIG. 11 is a flowchart showing a subroutine for phase adjustment.
FIG. 12 is an explanatory diagram illustrating the operation of the phase adjustment in FIG. 11;
FIG. 13 is a flowchart showing a subroutine of a read check.
FIG. 14 is a main part plan view showing a phase detection configuration of the gear processing machine of the second embodiment.
FIG. 15 is a flowchart showing a phase matching operation of the gear processing machine of FIG. 14;
FIG. 16 is an explanatory diagram illustrating a phase detection configuration of the gear processing machine according to the third embodiment.
FIG. 17 is an explanatory view showing a phase matching operation of a conventional gear processing machine.
[Explanation of symbols]
23: X-direction moving motor as adjusting means, 25: Z-direction moving motor, 27: hob as a cutter, 27a: cutting teeth, 29: cutter rotating motor, 31: work rotating motor, 35: work, 35a: tooth gap, 36: non-contact type sensor configured to also serve as work tooth detecting means, outer diameter detecting means, number of teeth detecting means, and lead detecting means, 38: control forming discriminating means and correcting means Apparatus, 39 ... memory, 42 ... input keys as setting means, 44 ... alarm as notification means, 47 ... contact type sensor, 49 ... work.

Claims (6)

In a gear processing machine that finishes a workpiece consisting of a gear that has been subjected to rough gear cutting with a cutter,
Prior to the engagement between the cutting teeth of the cutter and the tooth grooves of the work, a detection unit that detects the teeth of the work in a state where the work is continuously rotated in one direction,
Determining means for determining the position of the tooth of the workpiece based on the detection data from the detecting means;
A gear processing machine comprising: a correction unit that corrects the rotational phase of at least one of a workpiece and a cutter based on the result of the determination by the determination unit and makes the rotation phases coincide with each other. 2. An outer diameter detecting means for detecting an outer diameter of the work, and a notifying means for notifying when a detection result of the outer diameter detecting means deviates from a prescribed value, is provided. Gear processing machine. 2. The apparatus according to claim 1, further comprising: a number-of-teeth detecting means for detecting the number of teeth of the workpiece; Item 3. A gear processing machine according to item 2. 4. The apparatus according to claim 1, further comprising: a lead detecting means for detecting a lead of the work; and a notifying means for notifying when a detection result of the lead detecting means deviates from a prescribed value. The gear processing machine according to any one of the preceding claims. An adjusting means for adjusting a gap between the work and the detecting means according to any one of claims 1 to 4 is provided. The gear processing machine according to any one of the preceding claims. 6. A setting means for setting a cutting reference position of the cutter prior to the engagement between the cutting teeth of the cutter and the tooth grooves of the workpiece. A gear processing machine according to the item.

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