JPH0569663B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to a shaving cutter for finishing cutting the tooth surface of a warg gear such as a transmission gear for an automobile. This invention relates to an improvement of a shaving cutter tooth grinding device for grinding tooth surfaces.

(Prior art) Conventionally, when finish cutting the tooth surface of a warg gear such as a transmission gear for an automobile, for example,
In the method disclosed in Japanese Patent No. 131819, a shaving cutter is used, a slide base is provided that is movable back and forth with respect to the placement position of the shaving cutter, and a warg gear is placed on this slide base. As the slide base moves, the work gear is engaged with the shaving cutter to cut its tooth surface. In order to prevent the cutting accuracy of this tooth surface from decreasing due to thermal deformation of the shaving cutter or changes in ambient temperature, the deviation between the actual measured value of the warg gear after cutting and its appropriate value is determined. A technique is known that maintains high cutting accuracy of the work gear by sequentially correcting the amount of movement of the slide base according to the deviation value.

(Problem to be Solved by the Invention) By the way, when the tooth surface of the shaving cutter for cutting warg gears as described above becomes worn due to repeated cutting, the tooth surface must be ground before use. This process is repeated several times (for example, several dozen times), and this is effectively utilized to ensure long-term use from the time the product is new until the time it is disposed of.

However, when a shaving cutter is re-ground and used many times, its tooth thickness gradually decreases each time it is re-ground. Since the meshing state of the shaving cutter changes, in order to obtain the proper tooth surface shape of the work gear, it is necessary to change the tooth surface shape of the shaving cutter little by little each time it is reground. For this reason, when the shaving cutter is in good condition (not worn out), it is possible to cut the work gear almost properly, but when the shaving cutter is worn out, the re-grinding work relies on humans, and it is difficult to use human intuition and advanced skills. This method requires a high level of skill, making the re-grinding work difficult and time-consuming, and has the drawback that the tooth grinding accuracy of the shaving cutter (that is, the cutting accuracy of the warg gear) cannot be compensated for as expected.

The present invention has been made in view of the above, and its purpose is to re-grind the shaving cutter many times to ensure that the tooth flank shape of the warg gear is in the proper shape. By setting and storing the target gear grinding data for each grinding in advance, the re-grinding work for each wear can be appropriately automated, eliminating the need for human intuition or high level of skill, thus making the re-grinding work easier. The object of the present invention is to perform the grinding in a short time and to maintain high precision in grinding the teeth of the shaving cutter. At that time, if multiple target tooth grinding data are stored in advance,
Each target tooth grinding data is stored at a plurality of set points on the tooth surface, but when each set point is defined by a coordinate system on the working surface of the shaving cutter, this coordinate system is Since it changes depending on the tooth thickness, by defining each target tooth grinding data on the tooth surface of the warg gear, the coordinate system can be fixed regardless of the tooth thickness and the memory capacity of the tooth surface data can be reduced. This is the object of the present invention.

(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention, as shown in FIG. Cut the tooth surface of the shaving cutter A with a cutter grinder 1.
This assumes a shaving cutter tooth grinding device that performs re-grinding. Further, it is provided with a tooth grinding data storage means 8 for storing a plurality of tooth grinding data established in advance so that the warg gear W can be cut into the target tooth surface shape according to the tooth surface condition within the usable range of the shaving cutter A. A tooth surface condition measuring means 3 for measuring the tooth surface condition of the shaving cutter A, and a tooth surface condition measuring means 3 for reading tooth grinding data close to the tooth surface condition measured by the tooth surface condition measuring means 3 from the tooth grinding data storage means 8. a grinding data calling means 9; a grinding control means 10 for controlling the cutter grinding machine 1 to grind the tooth surface of the shaving cutter A based on the grinding data called by the grinding data calling means 9; Equipped with. Furthermore, the tooth grinding data in the tooth grinding data storage means 8 is defined and stored on the tooth surface of the warg gear W.

(Function) As described above, in the present invention, the tooth grinding data of the shaving cutter A that makes the tooth surface shape of the warg gear W into an appropriate shape is set in advance according to various tooth surface conditions (tooth thickness, etc.). Since a plurality of settings are stored in the storage means 8, when re-grinding the tooth surface of the shaving cutter A, the tooth surface condition (tooth thickness, etc.) at that time is first measured by the tooth surface condition measuring means 3, and then When the tooth grinding data with high surface condition (tooth thickness, etc.) is called by the grinding data calling means 9, the tooth surface of the shaving cutter A is ground by the cutter grinding machine 1 based on this tooth grinding data. The tooth surface shape of the shaving cutter A is easily ground in a short time according to the grinding data. As a result, if the warg gear W is cut with the shaving cutter A after re-grinding, the tooth flank shape of the W will be formed almost to the target tooth flank shape, regardless of the tooth thickness of the shaving cutter A at that time. As a result, the cutting accuracy is ensured as expected.

Moreover, since each tooth grinding data in the tooth grinding data storage means 8 is defined and stored on the tooth surface of the work gear W, the coordinate system is fixed regardless of the tooth surface condition (tooth thickness, etc.) at the time of re-grinding. Therefore, the memory capacity of the tooth grinding data is reduced accordingly.

(Example) Hereinafter, an example of the present invention will be described based on the drawings from FIG. 2 onwards.

Figure 2 shows an overall system diagram of a shaving cutter grinding machine, in which 1 is a cutter grinding machine;
As shown in FIG. 3, the cutter grinding machine 1 uses a relatively small-diameter dish-shaped grindstone 1a to grind a shaving cutter A for cutting a work gear such as a transmission gear for an automobile when its tooth surface is worn out. Through-grinding is performed to finish the entire tooth surface, and the tooth surface correction is performed by adjusting the axial position of the grindstone 1a by an amount corresponding to the amount of correction at each point on the path of the grindstone 1a.

Further, 2 is a gear cutting machine for experimentally finishing cutting the tooth surface of a warg gear using the shaving cutter A ground by the cutter grinding machine 1, and
As shown in FIG. 4, the gear cutting machine 2 rotates a shaving cutter A in mesh with a warg gear W at a predetermined axis intersection angle, thereby forming a shape on the tooth surface of the shaving cutter A. A large number of cutting grooves A _{1 .} . . as shown in FIG. 4 are used to finish cutting the tooth surface of the warg gear W. Furthermore, 3 is a three-dimensional measuring instrument, which measures the shaving cutter A ground by the cutter grinding machine 1 and the gear cutting machine 2.
The three-dimensional measuring device 3 constitutes a tooth surface condition measuring means for measuring the tooth surface condition of the shaving cutter A. There is.

In addition, 4 is a cutter grinding controller that controls the grinding operation of the shaving cutter A in the cutter grinding machine 1, and 5 is a cutter grinding controller 4 that transmits control information (about the tooth surface shape of the shaving cutter A). target value data)
6 is a measurement control computer that controls the tooth surface measurement operation in the three-dimensional measuring instrument 3, and 7 is a system control computer, which is the measurement control computer 6.
Receives measurement data of the tooth surface shape of the shaving cutter A after test grinding and the tooth surface shape of the warg gear W from the machine, and causes the cutter grinder 1 to grind the shaving cutter A again according to each measurement data. For the cutter grinding control computer 5,
It outputs a target value signal for the tooth surface shape of the shaving cutter A.

Next, the procedure for grinding the tooth surface of the shaving cutter A (tooth grinding procedure) by the system control computer 7 will be explained based on the flowcharts shown in FIGS. 7 to 11. First, to explain the general flowchart shown in FIG. 7, information necessary for grinding the teeth of the shaving cutter A in step S _A , such as the specifications of the work gear W and the type of the shaving cutter A, is shown in FIG. 8. Create it based on the tooth grinding information creation flow and store it in a file. Next, in step S _B , the preparation work for tooth grinding, for example, the work of reading out the target value data of the tooth surface shape of the shaving cutter A to be ground from the file, is carried out based on the tooth grinding preparation work flow shown in Fig. 9. I will do it.

Then, in step S _C , the grinding information including target value data, etc. is transferred to the cutter grinding control computer 5, where the input information to the cutter grinding controller 4 is analyzed, and the information necessary for cutter grinding (target value data, etc.) to this cutter grinding controller 4, and
Based on the trial grinding flow shown in the figure, trial grind the shaving cutter A with the cutter grinder 1, measure the tooth surface shape with the three-dimensional measuring device 3,
Repeat until the target shape is within the tolerance range. At this time, during this trial grinding, grinding information regarding the shaving cutters B to E to be ground next is sequentially transferred to the cutter grinding controller 4 via the cutter grinding control computer 5.

After that, when the tooth surface shape of shaving cutter A falls within the allowable range of the target shape, in step S _D , the shaving cutter A that has been completely ground is removed based on the trial shaving flow shown in Fig. 11. After trial shaving the work gear W using the gear cutting machine 2, measure the tooth surface shape of the work gear W with the three-dimensional measuring device 3, and repeat the above steps until the tooth surface shape of the work gear W is within the tolerance range of the target shape. Return to S _B and repeat the grinding to correct the tooth surface shape of shaving cutter A. At that time, the target value of the tooth surface shape of the shaving cutter A is corrected according to the deviation between the actual measurement value of the warg gear W and the target value, and the target value data at the time when it falls within the allowable range of the target shape is saved as a file. to be memorized.

Next, each flow shown in FIGS. 8 to 11 will be explained in detail. First, to explain the tooth grinding information creation flow shown in Fig. 8, after inputting the number and specifications of the shaving cutter tool and warg gear W in step S _A1 , basic quantities are calculated and calculated in step S _A2 . Memorize. After that, work gear W is set in step S _A3 .
Create predetermined lattice points ζ _RW (I), ζ _LW (I), η _RW (J), η _LW (J) on the left tooth flank and right tooth flank as shown in Fig. 6, and store them in memory. At the same time, in step S _A4 , the standard for the tooth surface shape of warg gear W (target tooth surface shape) is determined.
Create C _RTW (I, J) and C _LTW (I, J) and store them in memory.

Then, in step S _A5 , shaving cutter A
The reduction in tooth thickness within the life cycle of the tooth is divided in advance by division allowances equal to the average grinding allowance for each re-grinding, and the division thickness Em (IT) (IT=1, 2
), as well as the axis intersection angle Σ (IT) between the warg gear W and the shaving cutter A, the generation generatrix intersection angle Φ (IT), the actual lengths of the lines of action W _C (I), W _T (IT ),
Outer diameter d _KC (IT) of shaving cutter A, shift coefficient
Calculate X _NC (IT) etc. and store these in memory.

Next, shaving cutter A at step S _A6 .
Define the left and right tooth flank shape for each tooth thickness Em (IT) as the difference from the theoretical tooth flank (involute helicoidal surface), define this tooth flank shape on the tooth flank of warg gear W, and Storage area C _RSC (I, J),
C Secure _LSC (I, J). In other words, the orthogonal coordinates (X _C , Y _C ) on the working surface of shaving cutter A
In contrast, the tooth surface shape Z _C is expressed by the following formula Z _C = f (X _C , Y _C ), but if the tooth thickness Em is constant, the point on the tooth surface of shaving cutter A is Since it contacts the corresponding point (Xω _, Yω) on the tooth surface of _W , the above X _C and Y _C are expressed by the formula be done. In the end, the tooth flank shape Z _C is determined by the following formula Z _C = g (Xω, Yω, Em) from the above relationship, and from this relational formula, the tooth flank shape of the shaving cutter A can be determined by adjusting the tooth flank shape of the work gear W for each tooth thickness Em. Defined on the tooth surface.

After defining the shape of the tooth surface of the shaving cutter, the final step is step S _A7 , which provides the target tooth surface shape data (tooth grinding data) of the shaving cutter A at each tooth thickness Em (IT).
are the above storage areas C _RSC (I, J), C _LSC (I, J)
Development state value F _CS indicating whether the state is already stored in (hereinafter referred to as development state)
(IT), and initially set each development state value F _CS (IT) to the “0” value.
finish.

In addition, in the tooth grinding preparation work flow shown in FIG. 9, the target tooth surface shape of the shaving cutter A is read out or calculated in advance and determined. In other words, the step
At step S _B1 , a work number (for example, a number indicating completion of tooth grinding, in progress, waiting state for tooth grinding, etc.) is created, and at the same time, at step S _B2 , the shaving cutter tool number and the part number of the warg gear W are input.

After that, in step S _B3 , measure the current tooth surface condition (e.g. current tooth thickness value) E _MCA of shaving cutter A with the coordinate measuring device 3, input the measured value, and input the tooth surface condition in step S _B4 . Determine the tooth thickness number IT _C of the closest tooth thickness Emct in the list of thicknesses Em (IT).

In addition, in step S _B5 , in advance, the lattice point ζ _RW
(I), ζ _LW (I), η _RW (J), η _LW (J), and the standard tooth surface C _RTW (I, J), C _LTW (I,
J), and in step S _B6 the lattice points ζ _RC (K), ζ _LW (K) (K=1, M
+2), η _RC (L), η _LC (L) (L=1, N+2).

After step S _B7 , the tooth surface shape data (tooth grinding data) corresponding to the current tooth thickness of the shaving cutter A are stored in the storage areas C _RSC (I, J) and C _LSC .
Let us read from (I, J). First, in step S _B7 , the value of the development state value F _CS at the tooth thickness number IT _C closest to the current tooth thickness is determined, and if F _CS = 1, that is, the tooth grinding data has already been set and stored. In this case, in step S _B12 , the tooth thickness number IT _C is stored in the storage area ITA, and in step S _B13 , the cutter target tooth flank shape (tooth grinding data) for that tooth thickness number ITA is stored in the storage area C _RSC (I , J), C _LSC (I,
J), and shaving cutter A is to be ground based on this tooth grinding data.

If the development state value F _CS = 0 (if the tooth grinding data has not yet been set and memorized), step S _B8 is first performed to sequentially memorize the settings for each tooth thickness.
Determine whether or not there is a tooth thickness with F _CS = 1 that has been developed in the tooth thickness list, and
If F _CS = 0, the tooth thickness number IT _C closest to the current tooth thickness is stored in the storage area ITA in step S _B9 , and then the target of shaving cutter A at that tooth thickness is set in step S _B10 . The tooth surface shape data (predicted value), the generation generatrix intersection angle Φ at that tooth thickness, the actual length of the line of action W _C ,
Calculate using W _T. Then, when the cutter target tooth surface shape is calculated using a predetermined tooth thickness number as described above and is then modified as appropriate (described later), its development state value F _CS =1, so When creating target tooth flank shape data, it is better to use the cutter target tooth flank shape data (tooth grinding data) for the tooth thickness number in the above F _CS = 1 state because the calculated value (predicted value) at that tooth thickness is better. ), so in step S _B11 , select the tooth thickness selected from the tooth thickness list.
After determining the tooth thickness Em (ITA) with F _CS = 1 closest to Emct, in step S _B13 above, the cutter target tooth flank shape data (tooth grinding data) at the tooth thickness number ITA of that tooth thickness is stored in its storage area. C _RSC (I, J), C _LSC
(I, J) and grind the shaving cutter A based on this tooth grinding data.

After that, use the above shaving cutter A.
Since the tooth grinding data is defined on the tooth surface of the warg gear W, in order to capture this tooth grinding data on the working surface of the shaving cutter A, the left and right action of the shaving cutter A is determined in step S _B14 . The lattice points ζ _RC (K), ζ _LC (K), η _RC (L), η _LC (L) on the surface are mapped onto the left and right working surfaces of the warg gear W, and the shaving cutter A is mapped by interpolation. Target tooth surface (target tooth surface) C _RTV (K, L), C _LTV (K, L) (K=
1, M+2, L=1, N+2).

Then, in step S _B15 , input tooth surface (target tooth surface data at each grid point) to the cutter grinding control computer 5 ζ _RC (K), ζ _LW (K), η _RC , η _LW
(L), C _RTV (K, L), C _LTV (K, L) (C _RIV for the first time)
(K, L)=C _RTV (K, L), C _LTV (K, L)=C _LTV
(K,L)) and step
In step S _B16 , input data for calculating the setting amount such as the axial stroke of the grinding wheel 1a of the cutter grinding machine 1 is created, and in step S _B17 , this data is transferred to the cutter grinding control computer 5, and the process ends. do.

Next, to explain the trial grinding flow shown in Fig. 10, after the cutter grinding machine 1 is set to be ready for grinding in step S _C1 , the shaving cutter A is test-ground with this cutter grinding machine 1 in step S _C2 . .

After that, this shaving cutter A after grinding
is transferred to the three-dimensional measuring device 3, and in step S _C3 , the tooth surface shape of the shaving cutter a is measured in the cutting edge groove _A1 ...
The measured values are transferred to the system control computer 7 in step S _C4 , and then, in step S _C5 , each of the above measured values is calculated taking into account deviations from the set measurement points (grid points). Then, the measured values after correction are corrected to the values at each grid point, and the measured values after correction are converted into axis-perpendicular values t _RSC (K, L), t _LSC (K, L) (K=
1, M+1, L=2, N+1).

Then, in step S _C6 , each measured value t _RSC (K, L),
t Compare _LSC (K, L) with the target tooth surfaces C _RTV (K, L) and C _LTV (K, L) on the working surface of shaving cutter A set in step S _B14 in Fig. 9 above. Then, the tooth grinding error E _RSC (K, L), E _LSC (K,
L) (K=2, M+1, L=2, N+1), then determine whether this tooth grinding error is within the standard (within the allowable range), and if it is not within the standard, At step S _C8 , the differential stroke F _X of cutter grinding machine 1 and helix guide Fβ _MX
After calculating the setting amount change values such as, in step S _C9 , the target tooth surface C _RIV (K, L), C _LTV at each grid point is sent to the cutter grinding control computer 5.
(K, L) (K=1, M+2, L=1, N+2) by changing the input values of shaving cutter A.
In order to re-grind, return to step S _B16 in FIG. 9 above. If the tooth grinding error is within the standard, the process proceeds to step S _C10 , in which all teeth of the shaving cutter A are ground, and then step S _C10 is performed.
When performing trial shaving of the warg gear W using the shaving cutter A after this grinding is completed in S _C11 , proceed to the trial shaving flow shown in FIG. 10.

Next, to explain the trial shaving flow shown in Fig. 11, in step S _D1 , the shaving cutter A after grinding is transferred to the gear grinding machine 2,
The warg gear W is subjected to trial shaving using the gear grinding machine 2.

After that, in step S _D2 , the tooth surface shape of warg gear W is adjusted to the lattice points ζ _RW (I), ζ _LW (I), η _RW (J), η _LW (J) set in step S _B5 in Fig. 9 above. The measured values are transferred to the system control computer 7 in step S _D3 , and the measured values are converted into axis-perpendicular values t _RSW (I, J), t _LSW (I, J) in step S _D4 . Convert to

Then, in step S _D5 , each measured value t _RSW (I, J),
t Workpiece standard tooth surface corresponding to each _LSW (I, J)
Calculate the shape errors E _RSW (I, J) and E _LSW (I, J) by comparing C _RTW (I, J) and C _LTW (I, J),
In step S _D6 , the gear cutting machine 2 corrects the tooth surface shape error of the work gear W when the setting amount error of the cutter grinding machine 1 is corrected. Then, in step S _D7 , it is determined whether the tooth surface shape of the warg gear W is within the standard based on this tooth surface shape error, and if it is not within the standard, further steps are performed.
S _D8 determines whether or not it is a trial based on the development status value F _CS = 1. If F _CS = 1, it is determined that there is an error in the tooth grinding data settings themselves, and an _error is displayed. If = 0, the selected cutter target tooth flank shape data is corrected and the shaving cutter A is ground again, and in step S _D9 , the tooth flank shape error E _RSW (I, J) of the work gear W is calculated. , C _LSW
After correcting the cutter target tooth flank shape data in the storage areas C _RSC (I, J) and C _LSC (I, J) using (I, J) and the grinding allowance per one time, the shaving cutter A is restarted. Return to step S _B14 in FIG. 9 for grinding. In addition, if the workpiece tooth surface is within the specifications in step S _D7 , it is determined in step S _D10 whether or not the trial is based on the development status value F _CS = 1, and if F _CS = 0, it is determined in step S D10. is step S _D11
Enter the cutter target tooth surface shape data in step S _D9 above.
Similarly, the tooth surface shape error E _RSW (I,
J), E _LSW (I, J) and determine this as the initial value, and add the amount of grinding per time to this initial value to create the tooth grinding data that anticipates the amount of grinding on the tooth surface. and step this grinding data as
Storage area for tooth thickness number ITA corresponding to S _D12 C _RSC
(I, J), C _LSC Store in (I, J) and tooth thickness number
Change the development status value F _CS in ITA to "1" and end.

Therefore, by steps S _B7 to S _B11 of the grinding preparation work flow shown in FIG. 9 and steps S _D7 to S _D12 of the trial shaving flow shown in FIG. 10,
Storage area C _RSC (I, J) stores a plurality of tooth grinding data set in advance so that the warg gear A can be cut into the target tooth surface shape according to the tooth surface condition (tooth thickness) within the usable range of the shaving cutter A. , C constitutes a tooth grinding data storage means 8 stored in _LSC (I, J). In addition, the steps in the grinding preparation work flow shown in Figure 9.
With S _B12 and S _B13 , C _RSC (I, J) and C _LSC of the tooth thickness number closest to the tooth surface condition (tooth thickness) before re-grinding of shaving cutter A measured with the coordinate measuring device 3.
A tooth grinding data calling means 9 is configured to read (I, J) from the tooth grinding data storage means 8. Furthermore, according to the trial grinding flow shown in FIG. The grinding control means 10 is configured to be formed within the permissible range of grinding data).

Therefore, in the above embodiment, when cutting a large number of warg gears W..., the gear cutting machine 2
The shaving cutter A is transferred to the shaving cutter A, and the meshing rotation of the shaving cutter A and the work gear W as shown in _FIG . .

Each time the tooth surface of the shaving cutter A wears out due to the cutting of the warg gear W, the tooth surface is re-ground, and the shaving cutter A is used multiple times from when it was new to when it was discarded. It is repeatedly reused (approximately 30 times).

In that case, the tooth thickness of the shaving cutter A becomes thinner each time it is re-ground, and accordingly, the target tooth flank shape of the shaving cutter A that can cut the warg gear W into the standard tooth flank shape also changes. However, the storage area for each pre-divided tooth thickness Em (IT) (IT=1, 2...)
C _RSC (I, J) and C _LSC (I, J) each have preset and stored gear grinding data that can cut the warg gear W into a standard tooth surface shape. As a result, prior to re-grinding the shaving cutter A, the tooth surface condition (tooth thickness) of the shaving cutter A is measured with the three-dimensional measuring device 3, and the tooth thickness number closest to this measured value is
When the tooth grinding data of the ITC is called by the tooth grinding data calling means 9, and then the tooth surface of the shaving cutter A is ground by the grinding control means 10 using the cutter grinding machine 1 based on the called tooth grinding data, Since the tooth surface of the shaving cutter A is ground into the cutter target tooth surface shape corresponding to the above tooth grinding data, when this shaving cutter A is moved to the gear cutting machine 2 and the warg gear W is automatically cut, This Warg Gear W
This results in excellent cutting of almost the standard tooth surface shape.

Moreover, since each tooth grinding data in the tooth grinding data storage means 8 is defined on the tooth surface of the warg gear W and is fixed regardless of the tooth thickness of the shaving cutter A, the memory capacity is reduced accordingly. can.

Also. When initializing the grinding data for a predetermined tooth thickness (for example, tooth thickness number ITC = 3), use the tooth thickness number ITC that has been developed most recently (for example, ITC = 3).
The tooth grinding data in 1) is used, but in this case, when the target tooth surface shape of the shaving cutter A is defined on the cutter tooth surface, each tooth thickness (ITC=1,
When the orthogonal coordinate system lattice points on the cutter tooth surface in 3) are mapped onto the workpiece tooth surface, the positions of these two mappings are slightly different from each other, as shown by the broken lines in Figures 12 and 13, respectively, so the cutter coordinates are Even if the tooth surface shape is set to the tooth thickness number ITC=1 on the point, it will not be transferred correctly onto the workpiece tooth surface by the deviation of the orthogonal coordinate system lattice point. However, the target tooth flank shape is defined by the orthogonal coordinate system lattice points on the tooth flank of the warg gear, as shown by the solid line in the figure, so it does not change regardless of each tooth thickness number ITC, and the target tooth flank shape does not change regardless of the tooth thickness number ITC. Even if the target tooth flank shape with =1 is used, the above-mentioned deviation does not occur, and the work gear W can be cut almost to the target tooth flank shape.

Therefore, when re-grinding the shaving cutter A, the tooth surface shape can be automatically ground easily and quickly without human touch or high level of skill, and the standard teeth of the work gear W can be easily and quickly ground. High accuracy of tooth grinding of the shaving cutter A for obtaining the surface shape can be ensured regardless of the tooth surface condition (tooth thickness). Moreover, since the tooth grinding data for each tooth thickness is defined on the tooth surface of the warg gear W, the memory capacity can be reduced.

(Effects of the Invention) As explained above, according to the present invention, when re-grinding the tooth surface of the shaving cutter each time it wears out and reusing it multiple times, the warg gear is cut into the target tooth surface shape in advance. The tooth grinding data of the shaving cutter to be obtained is set for each tooth surface condition such as tooth thickness, and before re-grinding, the tooth surface condition of the shaving cutter is measured and recalled according to the tooth surface condition. Since the shaving cutter is automatically re-ground based on the gear grinding data, even if the tooth thickness of the shaving cutter decreases and changes each time the shaving cutter is re-ground, the warg gear The shaving cutter can be re-ground to a tooth surface shape that can be cut with high accuracy, the re-grinding work can be carried out easily and in a short time, and the tooth grinding accuracy of the shaving cutter can be ensured at a high level.

Furthermore, since the shaving cutter tooth grinding data that is stored in advance is defined on the tooth surface of the warg gear, the memory point of the tooth grinding data can be fixed regardless of the change in the tooth thickness at each re-grinding. , memory capacity can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the present invention. 2 to 13 show embodiments of the present invention, FIG. 2 is a general system diagram, FIG. 3 is an explanatory diagram showing how the shaving cutter is ground, and FIG.
The figure is an explanatory diagram of the meshing state of the shaving cutter and warg gear, Figure 5 is an enlarged view of the main part showing the cutting groove of the shaving cutter, and Figure 6 is an explanatory diagram of the lattice points on the tooth surface. . Figures 7 to 11 show the re-grinding flow of the shaving cutter, Figure 7 is the overall outline flow, Figure 8 is the tooth grinding information creation flow, Figure 9 is the tooth grinding preparation work flow, and Figure 10. is a diagram showing a trial grinding flow, and FIG. 11 is a diagram showing a trial shaving flow. 12th and 13th
The figure is an explanation showing the state of positional deviation when lattice points on the cutter tooth surface having different tooth thickness numbers are mapped onto the workpiece tooth surface. 1...Katsuta grinder, 2...Gear grinder, 3...
... Three-dimensional measuring instrument, 7... System control computer, A... Shaving cutter, W... Work gear, 8... Gear grinding data storage means, 9... Gear grinding data retrieval means, 10... Grinding control means.

Claims (1)

[Claims] 1. A shaving cutter tooth grinding device for re-grinding the tooth surface of a shaving cutter for cutting a work gear using a cutter grinder each time the tooth surface of the shaving cutter is worn out by cutting the work gear, A grinding data storage means for storing a plurality of grinding data set in advance so that the work gear can be cut into a target tooth surface shape according to the tooth surface condition within the usable range of the shaving cutter; A tooth surface condition measuring means for measuring the tooth surface condition; a tooth grinding data calling means for reading tooth grinding data close to the tooth surface condition measured by the tooth surface condition measuring means from the tooth grinding data storage means; and the tooth grinding data. and a grinding control means for controlling the cutter grinder to grind the tooth surface of the shaving cutter based on the tooth grinding data called up by the calling means, and the grinding data in the tooth grinding data storage means is , a shaving cutter tooth grinding device characterized in that definitions are defined and stored on the tooth surface of a work gear.