JP2002103219A - Grinding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinding device, in which trial operation is efficiently carried out while restraining and preventing the damage or the like of a grinding wheel. SOLUTION: The grinding device comprises a spindle motor 9 rotating a work to be ground, a motor for wheel spindle stock 14 moving the grinding wheel toward the work to be ground, and a numerical control device 50 for numerically controlling the spindle motor and the motor for wheel spindle stock based on a working operation program including profile data(PFD) of the work to be ground. The grinding device further comprises a program correcting means for correcting the working operation program to keep the work to be ground not being contact with the grinding wheel, a trial operation executing means for carrying out the trial operation based on the numerical control of the spindle motor and the motor for wheel spindle stock by using the corrected program, a contact detecting means 70 detecting the contact of the work to be ground with the grinding wheel during the trial operation, and an interrupting means interrupting the trial operation when the contact is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding device that can easily perform a test run.

[0002]

2. Description of the Related Art In general, a sliding surface of a sliding member is ground to obtain a desired (geometric) tolerance and surface roughness in order to ensure smooth sliding. In the case of a reciprocating engine for an automobile, for example, various parts such as a cam of a camshaft and its journal, a piston pin, a crank journal, and a crankpin are subjected to grinding. By the way, when grinding is performed by numerical control, it is necessary to actually operate the grinding device to check whether the input numerical data or program is correct according to the workpiece to be ground and the surface to be ground.
In other words, it is necessary to perform a trial run before starting full-scale product grinding. Here, in the case of grinding the outer peripheral surface formed coaxially with the axis of the work to be ground, such as a journal or a piston pin, only the feed amount (cut amount) of the grindstone becomes a problem, and a complicated profile is required. Since the data (PFD) is not required, the test operation of the grinding device can be performed relatively easily.

[0003]

However, when grinding a surface to be ground that is not formed coaxially with the rotation axis of the work to be ground, such as a crankpin, the grinding device is based on a large number of numerical data. Performs complicated grinding operations. For this reason,
Even if the test operation is performed, the burden on the operator (operator) becomes very large. Specifically, the operator performs a slow and careful test run and visually checks the complicated grinding operation so that the operator can quickly respond to contact or collision between the grinding wheel and the workpiece during the test run. You need to keep doing it.

However, the positional relationship between the work to be ground and the grindstone changes one after another according to the rotation of the work to be ground.
The planned grinding position tends to be behind the grinding wheel or the work to be ground, and it is very difficult to visually keep track of the planned grinding position over the entire circumference of the profile of the ground surface. If the whetstone and the surface to be ground come into contact (collision) at a position that is difficult to see due to an error in the input data or the like, the emergency stop or the like will be delayed, resulting in damage to the whetstone or the grinding device. There is also. The grinding device of the present invention has been made in view of such circumstances. That is, an object of the present invention is to provide a grinding device that operates based on numerical data and that can easily or efficiently perform a trial run while suppressing and preventing damage to a grinding wheel and the like.

[0005]

The inventor of the present invention has made intensive studies to solve this problem, and as a result of repeated trial and error,
The inventors came up with the idea of providing the grinding device with a contact detecting means capable of detecting the contact between the surface to be ground and the grindstone, and developed the grinding device of the present invention.

That is, the grinding apparatus of the present invention comprises a spindle motor for rotating a work to be ground, and a grindstone rotatably supported by a grindstone table, which is applied to the work to be ground from a direction perpendicular to the rotation axis of the work to be ground. The spindle motor and the grindstone drive motor are moved based on a machining operation program including profile data (PFD) including rotation angle data of the work to be ground having a correlation and position data of the grindstone. A numerical control device for numerically controlling a wheel head drive motor, comprising: a program correcting means for correcting the machining operation program so that the workpiece to be ground does not contact the grinding wheel; and A test run executing means for performing a test run by numerically controlling the spindle motor and the wheel head drive motor by a correction program corrected by the means. And a contact detecting means for detecting contact between the workpiece to be ground and the grindstone during the test operation, and an interruption means for interrupting the test operation when the contact is detected by the contact detecting means. It is characterized by the following.

According to the grinding apparatus of the present invention, the program correcting means corrects the machining operation program so that the workpiece to be ground does not come into contact with the grindstone, and the spindle motor and the wheel head drive are driven by the corrected program. Trial operation is performed by numerically controlling the motor. At this time, if the various numerical control data are correct, the grinding wheel does not come into contact with the surface to be ground during the test operation. On the other hand, if there is an error in various numerical control data due to an input error of the set value or the like, contact between the grinding wheel and the surface to be ground may occur. Here, since the grinding device of the present invention includes the contact detecting means, the contact can be automatically detected. When the contact is detected by the contact detection means, the interruption means interrupts the test operation based on the erroneous test operation PFD.
As a result, no matter where the contact occurs, regardless of whether the position is visible or not, the test operation is not continued after the contact. Therefore, it is possible to suppress and prevent damage to each part such as a grindstone. Further, the provision of the contact detection means eliminates the need for the operator (operator) to continuously follow the movement of the grindstone visually. If the test run is automated, the labor required for the test run by the operator can be significantly reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by showing embodiments of the grinding apparatus of the present invention. (1) Contact Detecting Means The contact detecting means detects the contact between the workpiece to be ground and the grindstone which occurs during the test operation, and various forms such as a contact type and a non-contact type are conceivable. For example, a sensor that detects vibration at the time of contact, a sensor that detects a change in electrical resistance at the time of contact, and the like. In particular, when the contact detection means is an AE (Accosti)
c Emission) sensor is preferred.

[0009] The AE sensor uses an elastic wave (Accosti) generated at a contact point when a work to be ground and a grinding wheel come into contact with each other.
c Emission). The target frequency range is an ultrasonic range of 10 kHz to 2 MHz. By targeting such a high-frequency signal, it is hardly affected by disturbance such as mechanical vibration. For this reason,
The AE sensor is excellent in that the change in the state of the work to be ground or the grindstone can be extremely sensitively and faithfully detected, and the detection time is early. The position at which the contact detection means is provided may be determined as appropriate according to the characteristics of the sensor and the like, and is not particularly limited. For example, in the case of an AE sensor, it may be provided on a headstock or tailstock (ram or the like) that supports a work to be ground. Further, it may be provided at an end of a grindstone stand or a rotating shaft of a grindstone.

(2) Interruption means The interruption means interrupts the test run when the contact is detected by the contact detection means. Specifically, it is preferable that the suspending means is a stopping means for stopping the spindle motor and the grinding wheel drive motor. When the contact detection unit detects a contact and outputs a contact detection signal (for example, an AE signal), the numerical control device or PLC (program logic controller) or the like to which the contact detection signal has been input is:
The test run can be stopped by stopping the spindle motor and the wheel head drive motor. At this time, the power supply to the spindle motor and the grindstone drive motor may be cut off by applying an emergency stop. Further, it may be programmed so that the work to be ground or the grindstone returns to a predetermined position when a contact detection signal is input.

(3) Numerical control device The numerical control device numerically controls the spindle motor and the wheel head drive motor based on a machining operation program.
The machining operation program includes, for example, a cutting operation program for controlling a cutting operation of a grindstone with respect to a work to be ground, and profile data (PF) including rotation angle data of the work to be ground having a correlation and position data of the grindstone.
D). Of course, the machining operation program may include numerical data of the forward movement of the grinding wheel to the grinding start (planned) position or the backward movement after the grinding is completed.

As described above, the numerical control device numerically controls the spindle motor and the grindstone drive motor, thereby providing a PFD.
In addition to making the work to be ground and the grindstone move based on the grinding motion, rough grinding feed, fine grinding feed, fine grinding feed for grinding the grinding allowance, and spark-out such as spark-out to make the workpiece to a predetermined size (finish diameter). The cutting operation of the grindstone with respect to the ground work is performed to grind (test run) a ground surface that is not coaxial with the rotation axis of the work to be ground.

It is preferable that the numerical control device includes a storage unit for storing contact position information when the contact is detected by the contact detection unit. Debugging of input data, a machining operation program, and the like can be efficiently performed based on the contact position information. The contact position information is, for example, rotation angle data of the work to be ground and position data of the grindstone. Of course,
The PFD of the contact position even if it is not the data itself
May be stored. It is also preferable that a program execution stop position be displayed on a monitor based on the stored information.

(4) Program Correction Means The program correction means corrects the machining operation program so that the work to be ground does not contact the grinding wheel.
When the machining operation program includes the cutting operation program and the PFD, the program correcting means corrects at least one of them. For example, when correcting the cutting operation program, the program correcting means corrects the cutting operation program so as to shift the cutting advance end position of the grindstone defined by the cutting operation program by a predetermined amount rearward with respect to the position used during processing. I do. More specifically, the program correcting means adjusts the cutting advance position of the grinding wheel defined by the cutting operation program to the cutting advance position of the grinding wheel in actual machining, that is, with respect to the position at which the workpiece to be ground has a finishing diameter. It is preferable to correct the cutting operation program so that the cutting operation program is shifted to a position offset to the plus side by Δr.

As a result, a clearance of approximately Δr is generated between the outer periphery of the grinding wheel and the outer periphery of the crankpin, and the test operation can be performed. However, it is needless to say that Δr needs to be an appropriate value in consideration of the grinding allowance. Therefore, in the grinding apparatus according to the present invention, the machining operation program includes a cutting operation program for controlling the cutting operation of the grinding wheel with respect to the workpiece to be ground and the PFD, and the program correcting means performs the cutting of the grinding wheel defined by the cutting operation program. It is preferable that the cutting operation program is modified so that the forward end position is shifted rearward by a predetermined amount with respect to a position used during machining.

Also, separately from the grinding PFD, or
Modify the grinding PFD based on the grinding PFD so that the work to be ground does not contact the grinding wheel
May be created. Specifically, considering the case where a test operation PFD in which the outer peripheral surface of the crankpin is to be ground is prepared, when the test operation PFD is prepared, the crankpin diameter d is replaced with the crankpin diameter d + Δd (Δd> 0). ). Then, as long as the calculation program of the PFD and other setting input data are correct, a test operation PFD in which a clearance of Δd / 2 (= Δr) is obtained between the outer periphery of the grinding wheel and the outer periphery of the crankpin can be obtained. However, it is needless to say that Δd needs to be an appropriate value in consideration of the grinding allowance.

A test run PFD may be prepared by offsetting the position data of the grindstone of the grinding PFD to the plus side by Δr. As described above, in the grinding device of the present invention, the program correcting means may correct the PFD so that the workpiece to be ground does not come into contact with the grindstone to create the test run PFD. Furthermore, even if the program correction means does not directly correct the machining operation program, the origin coordinate of the grinding wheel head on the advancing / retreating axis of the grinding wheel head is offset by Δr to the plus side, and the grinding wheel outer circumference and the crank pin outer circumference are offset. May be such that a clearance of approximately Δr is obtained. However, Δr is an appropriate value in consideration of the grinding allowance.

(5) Test run execution means The test run execution means performs a test run by numerically controlling the spindle motor and the wheel head drive motor according to a correction program corrected by the program correction means. Of course, it may include a forward movement of the grindstone to the corrected forward end position or a backward movement after the end of the test operation. By performing such a trial operation, by performing a generating motion in a state where the workpiece to be ground does not contact the grinding wheel, it is possible to determine whether various numerical control data for grinding is correct without actually performing grinding. can do.

(6) Other Grinding Stone When the grinding stone is a normal grinding stone, it is more preferable to use the grinding device of the present invention. Normal whetstones are liable to crack or the like when an impact force is applied by contact. However, according to the grinding device of the present invention, the contact detecting means quickly detects the contact, and the interrupting means does not allow the subsequent contact. For this reason, even if contact occurs during the test operation, a large impact force is not applied to the ordinary grindstone, and damage to the ordinary grindstone can be prevented. Of course, it is not limited to ordinary whetstones, but CBN (Cubic Boro)
(n nitride: cubic boron nitride) A grindstone or the like may be used.

Grinding Work The grinding apparatus of the present invention is suitable for grinding a work to be ground having a surface to be ground that is not coaxial with the rotation axis. For example,
This is a case where the cam surface of the camshaft and the outer peripheral surface of the crankpin are ground. In particular, it is preferable that the workpiece to be ground is a crankshaft having a crankpin that is ground by a grindstone in a state of planetary motion at a position eccentric to the rotation center of the workpiece during grinding. Since the crankshaft has a complicated shape of the crank arm and balance weight that connect the crank journal and the crankpin, it is very difficult for the operator to visually check the positional relationship between the crankpin and the grinding wheel all around. It is. Therefore, in the grinding apparatus of the present invention, the grinding stone is a normal grinding stone, and the workpiece to be ground is a crank pin that is ground by the grinding stone in a state of performing a planetary motion at a position eccentric with respect to the rotation center of the work during grinding. It is preferable that the crankshaft has a crankshaft.

In the above, the case of grinding a workpiece having a surface to be ground which is not coaxial with the rotation axis has been mainly described, but the grinding apparatus of the present invention is not limited to this. . For example, a case where the outer peripheral surface of a cylinder coaxial with the rotation axis is ground may be used. Although the grinding device has been described, the same concept as the present invention can be applied to machine tools such as a numerically controlled lathe, milling machine, and machining center. In other words, the concept of the present invention can be extended to a machine tool including a contact detection unit that detects a contact during a test run and an interruption unit that interrupts a test run when the contact is detected. .

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described with reference to embodiments related to the grinding apparatus of the present invention. (Overall Configuration of Grinding Apparatus) FIG. 1 shows an overall view of a crankpin grinding apparatus 100 which is an embodiment of the grinding apparatus of the present invention. Hereinafter, each unit will be described. The crank pin grinding device 100 is configured such that the table 2 is placed on a pair of guides 3 provided in parallel in the lateral longitudinal direction of the bed 1 so that the table 2 extends in the lateral direction (Z
(In the axial direction). A headstock 7 and a tailstock 8 are arranged on both ends of the table 2 so as to face each other. A spindle motor 9 is provided on the headstock 7, and a crankshaft CS (work to be ground) has its shaft end held by a chuck. The tailstock 8 supports the other shaft end side of the crankshaft CS by the center. An AE sensor 70, which is a contact detecting means according to the present invention, is attached to the center of the tailstock 8.

The main shaft motor 9 is controlled to rotate the crankshaft CS about the axis (C axis) of the crank journal based on a command from a numerical controller 50 described later. The bed 1 is provided with a feed screw 4 in the Z-axis direction, and the table 2 is slid laterally by a table drive motor 5 provided on the left end thereof. By moving the table 2 in the Z-axis direction, the rotary grindstone 16 can be moved to different positions of the crank pins CP1, CP2 and the like. In a direction (X-axis direction) orthogonal to the sliding direction (Z-axis direction) of the table 2, a pair of X
A shaft guide 12 is provided. And the wheel head 11
Is controlled by an X-axis feed screw 13 and a grinding wheel head drive motor 14.
It is slidably mounted on the shaft guide 12. further,
The grindstone table 11 has a disk-shaped rotating grindstone 16 that is rotated and driven by a drive motor (not shown) on one side.

The spindle motor 9, table drive motor 5 and grinding wheel drive motor 14 are composed of servo motors that can be controlled and rotated by a numerical controller 50, which will be described later, and include encoders 10, 6, and 15, respectively. Output a rotation signal to each control circuit. By the way, the numerical control device 50 of the crankpin grinding device 100
It has a U52, a memory 60, and an interface 53 inside. The memory 60 has a crank pin grinding PFD,
A machining operation program including a cutting operation program and the like, and a test operation operation program which is a modification program in which the machining operation program is modified by the program modifying means of the present invention are stored.
Input from 1. The interface 53 can communicate with the spindle motor control circuit 41, the grinding wheel drive motor control circuit 43, and the table drive motor control circuit 42, and the control circuits are respectively the spindle motor 9 (C axis),
A control signal is transmitted to the wheel head drive motor 14 (X axis) and the table drive motor 5 (Z axis).

(Operation of Grinding Apparatus) Next, the operation of the crankpin grinding apparatus 100 will be briefly described. The numerical control device 50 firstly outputs the crankpin CP (for example,
The table drive motor 5 is driven to move the table 2 in the Z-axis direction so that the position of CP1) and the position of the rotary grindstone 16 are aligned. Next, based on the cutting operation program, the grindstone drive motor 14 is driven to move the grindstone head 11 in the X-axis direction to the grindstone head advance position. Here, as shown in FIG. 4 and FIG.
6 is a position where a clearance of Δr is formed between the outer circumference of the crank pin 6 and the outer circumference of the crankpin CP. Subsequently, the spindle motor 9 is driven based on the PFD to rotate the crankshaft CS, and the grindstone drive motor 14 is driven in accordance with (that is, in correlation with) the planetary rotation phase of the crankpin CP, The rotating grindstone 16 is moved forward and backward in the X-axis direction. Thus, the trial operation of the crankpin grinding device 100 is performed.

(PFD and test run operation program)
The PFD and the test operation program stored in the memory 60 of the numerical controller 50 will be described. PFD is
As shown in FIG. 2, the rotation angle includes the rotation angle of the crankshaft CS about the C axis and the position (coordinates) of the grindstone in the X axis direction.
For example, θn subdivided every 1 ° and X related thereto
θn. FIG. 2 shows only one type of PFD for grinding, but a PFD for each step such as a PFD for rough grinding and a PFD for finish grinding may be present.

Next, the test operation program (procedure) will be described with reference to the flowchart shown in FIG. First, in step S1, data such as the diameter of the crankpin of the crankshaft CS and the arm length are input to the input / output device 51.
Enter from. In step S2, a master work, which is a work to be ground for trial operation, is attached to the headstock 7 and the tailstock 8, and initialization is performed. In step S3, an offset value (Δr) is input so that the crank pin CP and the rotary grindstone 16 do not come into contact with each other.

In step S4, the cutting forward end position of the grindstone defined by the cutting operation program, that is, the offset value (Δr) input in step S3 with respect to the position where the work to be ground becomes the finishing diameter, is on the plus side. The cutting operation program is corrected and stored in the memory 60 so that the position offset to the above is set as the forward position of the grindstone in the test operation operation program (program correction means).

In step S5, it is determined whether or not the operator has turned on the start switch for trial operation. When the switch is turned on, the table 2 is moved and positioned in the Z-axis direction in step S6 according to the crankpin CP to be tested.

In step S7, the wheel head drive motor 14 receives the pulse output, and the wheel head 11 gradually advances at a low speed, and is continued until it reaches a predetermined advance position (step S9). If the rotary grindstone 16 comes into contact with any of the crankshafts CS during the forward movement, a contact detection signal is output from the AE sensor 70 to the numerical control device 50 in step S8, and steps S15 and S16 are performed.
Proceed to. Steps S15 and S16 will be described later.

Next, when the grinding wheel head 11 moves forward to a predetermined forward position, in step S10, the spindle motor 10 receiving a pulse output from the numerical controller 50 based on the PFD.
And the grindstone drive motor 14 perform a synchronous operation. On the way, when the rotating grindstone 16 comes into contact with the crankpin and a contact detection signal is output from the AE sensor, the aforementioned step S
15. Go to step S16. On the other hand, if there is no contact or the like and the predetermined rotation is made, it is determined that the crankpin CP currently performing the test operation is normal (step S12), and the step S1
In step 3, the spindle motor 9 and the grindstone drive motor 14 are temporarily stopped, and then the grindstone drive motor 14 is reversed to move the grindstone 11 backward.

Further, in step S14, it is confirmed whether or not all the crankpins have been tested. When the test operation for all the crankpins is completed, the test operation is ended and the original grinding is started. On the other hand, when the test run for all the crankpins has not been completed, the process returns to step S6 to perform the test run for the next crankpin. The test run executing means according to the present invention includes steps S5 to S14. Here, the test operation is performed for all the crankpins, but the test operation may be performed by designating one or several crankpins in order to shorten the cycle time.

When the AE sensor 70 detects the contact between the rotary grindstone 16 and the crankshaft CS, the process proceeds to step S15, and the supply of the pulse output to the spindle motor 9 and the grindstone drive motor 14 is stopped. And
The rotation of the spindle and the movement of the grinding wheel head 11 in the X-axis direction are stopped (stop means). At this time, simultaneously, the contact position information is stored in the memory 60 (storage means) of the numerical controller 50, which is useful for confirming and correcting input data and the like performed in step S16. When new numerical data or the like is input, the process returns to step S4, restarts the trial operation, and checks the input data and the like again.

(Other Embodiments) FIG. 5 shows an example in which the PFD is changed by the program correcting means in the above-mentioned test operation program (procedure). That is, the aforementioned step S4 is changed to step S4 ′,
At 4 ', a test run PFD is created based on the offset value (Δr) input at step S3 and stored in the memory 60. As shown in FIG. 6, the production of the test operation PFD using the outer peripheral surface of the crankpin CP as the surface to be ground is performed by replacing the crankpin diameter d with the crankpin diameter d.
By setting + Δr × 2, a test operation PFD in which a clearance of Δr occurs between the outer circumference of the rotary grindstone 16 and the outer circumference of the crankpin CP is obtained. However, Δr is an appropriate value in consideration of the grinding allowance. It goes without saying that the advance position of the grinding wheel head 11 is determined by creating the test operation PFD. PFD for test operation described above
By performing a test operation using the method, it is possible to strictly determine whether various numerical control data for grinding is correct.

Further, as described above, the PFD for the grinding operation need not be recalculated from the crankpin diameter of the crankshaft CP input in step S1, the offset value (Δr) input in step S3, etc. It is also possible to offset the position data of the wheelhead by Δr to the plus side to create a test run PFD. Further, the program correcting means changes a cutting operation program for controlling a cutting operation of the grindstone with respect to the work to be ground, and profile data (PFD) including rotation angle data of the work to be ground having a correlation and position data of the grindstone. The present invention is not limited to this, and it is also possible to use a grinding PFD as it is by offsetting the origin coordinate of the grinding wheel head in the axis of movement of the grinding wheel head to the plus side by Δr. As described above, this crankpin grinding device 1
No. 00 is characterized in that the basic configuration is the same as the conventional one, and the test run function is characterized. After the end of the test run, the crankpin can be ground as in the conventional case.

[0036]

According to the grinding apparatus of the first aspect of the present invention, the program correcting means corrects the machining operation program and performs a test run. At this time, if the numerical control data input is incorrect, Even if the grinding wheel and the surface to be ground are in contact with each other, if the contact is detected by the contact detection means, the interruption means interrupts the test operation, so that the burden on the operator during the test operation can be significantly reduced. In addition, breakage of the grindstone can be prevented. According to the grinding device of the present invention described in claim 2, the program correcting means only shifts the cutting advance end position of the grindstone defined by the cutting operation program backward by a predetermined amount with respect to the normal processing position, A modified program for commissioning is obtained. According to the grinding device of the present invention described in claim 3, the program correcting means corrects the regular grinding PFD to obtain the test operation PFD. Therefore, it is determined whether or not various numerical control data for grinding is correct. It can be determined exactly.

According to the grinding apparatus of the present invention, since the trial operation is interrupted when the grinding wheel comes into contact with the workpiece to be ground, even if the grinding wheel is a normal grinding wheel, the grinding wheel is prevented from being damaged. it can. Further, when the work to be ground is a crankshaft, it is difficult for an operator to visually observe the presence or absence of contact between the grindstone and the work to be ground, but according to the grinding device of the present invention, the worker has: You are free from such work. According to the grinding device of the fifth aspect of the present invention, since the contact detecting means includes the AE sensor, the contact can be detected quickly without being substantially affected by disturbance.

[Brief description of the drawings]

FIG. 1 is an overall view of a crankpin grinding device according to an embodiment of the present invention.

FIG. 2 is a view showing a grinding PFD of the embodiment.

FIG. 3 is a flowchart illustrating an example of a test operation program of the embodiment.

FIG. 4 is a view showing a clearance formed between a rotary grindstone and a crankpin in the embodiment.

FIG. 5 is a flowchart illustrating an example of a test operation program according to another embodiment.

FIG. 6 is a view showing a test operation PFD of another embodiment.

[Explanation of symbols]

 9 Spindle motor 11 Wheel head 14 Wheel head drive motor 16 Rotating wheel 50 Numerical controller 70 AE sensor (contact detecting means) CS Crank shaft (Work to be ground) CP Crank pin

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G05B 19/4093 G05B 19/4093 H (72) Inventor Masahiro Ido 1-1-1 Asahimachi, Kariya City, Aichi Prefecture Toyota Koki Co., Ltd. F term (reference) 3C029 AA15 3C034 AA01 AA13 CA13 CA24 CB03 DD13 3C043 AC23 CC03 5H269 AB07 BB03 MM01 NN02

Claims (5)

[Claims] 1. A spindle motor for rotating a work to be ground, and a grindstone table for moving a grindstone rotatably supported by the grindstone table relative to the work to be ground from a direction orthogonal to a rotation axis of the work to be ground. Profile data (PFD) comprising a drive motor, rotation angle data of the work to be ground having a correlation, and position data of the grinding wheel.
A numerical control device for numerically controlling the spindle motor and the grinding wheel drive motor based on a processing operation program including: a grinding machine, wherein the grinding is performed so that the workpiece to be ground does not contact the grinding wheel. Program correction means for correcting the operation program; test operation execution means for performing a test operation by numerically controlling the spindle motor and the grinding wheel drive motor with the correction program corrected by the program correction means; A grinding apparatus, comprising: contact detection means for detecting contact between a grinding work and the grinding wheel; and interruption means for interrupting the test run when the contact detection means detects the contact. 2. The grinding apparatus according to claim 1, wherein the processing operation program includes a cutting operation program for controlling a cutting operation of the grinding stone with respect to the workpiece to be ground and the PFD. A grinding machine, wherein the cutting operation program is modified so that a cutting advance end position of the grindstone defined by the cutting operation program is shifted backward by a predetermined amount with respect to a position used during machining. 3. The grinding apparatus according to claim 1, wherein the program correcting means corrects the PFD so that the work to be ground does not come into contact with the grindstone to create a test operation PFD. Grinding equipment. 4. The grinding device according to claim 1, wherein the grinding wheel is a normal grinding wheel, and the workpiece to be ground is planetary motion at a position eccentric with respect to the rotation center of the workpiece during grinding. A grinding shaft having a crankpin that is ground by the grindstone in a state where the grinding wheel has been set. 5. The grinding apparatus according to claim 1, wherein said contact detecting means comprises an AE sensor.