JPH10118891A - Cutting device for bearing inner and outer ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly accurately, efficiently, and continuously cut works by providing a control circuit which outputs a correction signal to an NC lathe main body, when it judges that a work shape is deviated from the value set based from the reference shape. SOLUTION: A work outer shape calculation circuit 16 in a control circuit 12 for an outer shape dimension measuring device processes a signal inputted from a camera 1 and calculates the work shape cut by an NC lathe main body. A comparator circuit 17 of the control circuit 12 compares the calculated work shape with the reference shape stored in a reference shape storage circuit 18 to calculate its difference. Based on the output of the comparator circuit 17, a correction signal composed of a cutting correction quantity of the work 9 and a replacement signal of a blade is outputted from an output circuit 19 to the first NC lathe main body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing inner and outer ring cutting device for cutting a workpiece of an inner or outer ring of a bearing into a predetermined shape and mass-producing the work.

[0002]

2. Description of the Related Art A cutting device for bearing inner and outer races accurately cuts a workpiece by a numerical signal input from a computer. The cutting device for the inner and outer races of the bearing accurately controls the cutting amount based on the input numerical signal. However, the currently used cutting devices for the inner and outer races of the bearing are not equipped with a mechanism for feeding back the shape of the cut work and correcting the cut amount. For this reason, it is necessary to remove the workpiece to be cut with extremely high precision from the cutting device for the inner and outer races of the bearing after cutting and measure the dimensions. If the measured dimensions are deviated, it is necessary to set the workpiece again in the bearing inner and outer ring cutting device and cut it. In this way,
A conventional bearing inner and outer ring cutting device for cutting a work cannot efficiently perform high-precision cutting. This is not only because it takes time and effort to attach and detach the work, but also when the work is set again, it cannot be mounted in the same manner as in the previous time.

[0003] In order to prevent such adverse effects, a cutting device for inner and outer rings of a bearing has been developed which detects the shape and dimensions of a cut workpiece by light so as not to come into contact with each other and corrects the cutting amount based on the detection result. (JP-A-4-93150).

FIG. 1 shows a block diagram of an NC machine tool described in this publication. The apparatus shown in this figure processes a workpiece with high precision as described below. The output of the camera 1 is processed by the recognition device and the shape and size calculation device to calculate the shape and size of the work. The dimension comparator compares the workpiece shape with the reference shape called from the reference dimension calling device. The calculating means calculates the correction processing method and the amount, and calculates the correction processing N
The NC machine tool is controlled by the C program generator.

[0005]

The NC machine tool shown in FIG. 1 corrects the cutting amount and the like by comparing the shape and dimensions of the work with the reference shape, so that the shape of the work can be extremely accurately adjusted.
The feature is that it can be processed to be close to the reference shape.

However, since the NC machine tool shown in FIG. 1 detects the shape of the cut work in a state where the work is mounted on the machine tool, the work cannot be cut when measuring the shape of the work. Furthermore, when measuring the external shape of the work, if the cutting oil or cutting debris adheres to the surface of the work, it will not be possible to accurately measure the work shape.After cutting the work, pressurized air is blown onto the surface Therefore, it is necessary to blow off the cutting oil and cuttings to remove them neatly. This further increases the measurement time of the workpiece and shortens the time during which the workpiece can be cut. For this reason, the number of workpieces cut per unit time decreases, the tact time for cutting one work increases, and there is a disadvantage that a large number of works cannot be cut efficiently. The inner and outer races of the bearing are mass-produced parts, and it is extremely important how efficient and inexpensive cutting can be.

Further, the NC machine tool shown in FIG. 1 mounts a work on a table and measures the work. Therefore, a light source irradiates the work obliquely, and the camera 1 is disposed directly above the work. When the shape of the work is measured in this arrangement, it is difficult to accurately measure the outer shape of the work. This is because the brightness changes considerably on both sides of the work, and a dark shadow is formed near the work on the opposite side of the light source.

[0008] The present invention has been developed for the purpose of further solving this drawback. An important object of the present invention is to provide a bearing inner and outer ring cutting device capable of cutting a large number of workpieces in a short cycle time with high efficiency and efficiency.

[0009]

According to a first aspect of the present invention, there is provided an apparatus for cutting a bearing inner and outer races, which cuts a workpiece 9 with a blade by numerical control. Further, the cutting device for the inner and outer races of the bearing of the present invention cuts the work 9 with a blade.
C lathe body 2 and work 9 cut by NC lathe body 2
And an external dimension measuring device 3 for measuring the external shape of the supplied work 9 with light.

The external dimension measuring device 3 includes a chuck for holding a work 9 cut by the NC lathe main body 2 at a fixed position, and a light source 13 for irradiating the work 9 held on the chuck with light.
A camera 1 that receives the light emitted from the light source 13 and detects the outer shape of the work 9, calculates a shape of the work 9 from an output signal of the camera 1, and calculates the calculated work shape as a reference shape. And a control circuit 12 that outputs a correction signal to the NC lathe main body 2 when it is determined that the workpiece shape deviates from the reference shape by a value equal to or greater than the set value.

When a correction signal is transmitted from the external dimension measuring machine 3 to the NC lathe main body 2, the NC lathe main body 2 corrects the cutting amount of the work 9 with the correction signal, or interrupts the cutting of the work 9, Alternatively, the blade for cutting the work 9 is replaced.

Further, the bearing inner and outer ring cutting device according to a second aspect of the present invention includes a touch sensor 4 for measuring the inner shape of the work 9 in addition to the outer dimension measuring device 3 for measuring the outer shape of the work 9. The touch sensor 4 comes into contact with the inner surface of the work 9 cut by the NC lathe main body 2, measures the inner shape of the work 9, and outputs a correction signal to the NC lathe main body 2.
The external dimension measuring device 3 transmits a correction signal for measuring the external shape of the work 9, and the touch sensor 4 transmits a correction signal for measuring the internal shape of the work 9 to the NC lathe main body 2.
The cutting amount of the work 9 is corrected by the correction signal, the cutting of the work 9 is interrupted, or the blade for cutting the work 9 is replaced.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a bearing inner and outer ring cutting device for embodying the technical idea of the present invention, and the present invention does not specify a bearing inner and outer ring cutting device as follows. .

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”. However, the members described in the claims are not limited to the members of the embodiments.

The cutting device for the inner and outer races of the bearing shown in FIG. 2 is an NC lathe body 2 for producing a work by cutting a raw material with a knife by numerical control, and a workpiece cut by the NC lathe body 2 is transferred and supplied. An external dimension measuring machine 3 for measuring the external shape of the cut work with light, a touch sensor 4 for measuring the internal shape of the workpiece cut by the NC lathe main body 2, and an external dimension measuring machine 3 and a touch sensor from the NC lathe main body 2. And transport means 5 for transporting the work to the work 4.

The NC lathe main body 2 includes a first NC lathe main body 2A for cutting an outer periphery of a work which is an inner ring or an outer ring of a bearing, and a second NC lathe main body 2B for cutting an inner periphery of the work.
And The first NC lathe main body 2A and the second NC lathe main body 2B store a cutting program for cutting a work, and cut the work according to the cutting program. Further, in the first NC lathe main body 2A, a cutting program for correcting the cut amount of the work is input as a correction signal from the external dimension measuring device 3, and the cut amount of the work is corrected according to the cut program. The second NC lathe main body 2B
A cutting program for correcting the cutting amount of the work is input from the touch sensor 4 as a correction signal, and the cutting amount of the work is corrected according to the cutting program.

Further, the first NC lathe main body 2A and the second NC lathe
Although not shown, the lathe main body 2B includes a tool rest on which a replaceable spare tool can be set. External dimensions measuring machine 3
When the signal for exchanging the blade is input from the touch sensor 4 to the NC lathe main body 2, the NC lathe main body 2 replaces the blade used for cutting with a spare blade set on the tool rest. A plurality of spare blades are set on the tool rest.

The cutting device for the inner and outer rings of the bearing shown in FIG.
The work of the hopper 6 is transported by the transport means 5 in the order of the first NC lathe main body 2A, the external dimension measuring machine 3, the second NC lathe main body 2B, and the touch sensor 4. The conveying means 5 includes a chute 7 for transferring the work of the hopper 6 to the vicinity of the device section of the first NC lathe main body 2A, and the work transferred by the chute 7 is clamped to fix the fixed position of the first NC lathe main body 2A. And a clamping member 8 to be transferred to The clamping member 8 chucks one workpiece transferred to the tip of the chute 7 and transfers the workpiece to a fixed position of the first NC lathe main body 2A. The work transferred to the fixed position of the first NC lathe main body 2A is held by the chuck of the first NC lathe main body 2A. The chuck of the first NC lathe main body 2A has an enlarged shaft 10 which is a chuck inserted into the center hole 9A of the work 9 as shown in the sectional view of FIG. The enlarged shaft 10 is thin when the work 9 is inserted, and after the work 9 is inserted, the enlarged shaft 10 is expanded to have a large diameter to hold the work 9 in a fixed position.

The transfer means 5 has an unloader 11 for taking out the work cut by the first NC lathe main body 2A and transferring it to the next step. The unloader 11 is disposed in an inclined posture. The unloader 11 has a tip extended and holds the work held by the chuck, and supplies the work to the chute 7 in the next step. Unloader 11 is the first N
When the work is taken out from the C lathe main body 2A, the enlarged shaft of the chuck is thinned so that the work can be taken out smoothly.

The conveying means 5 for supplying the work to the fixed position of the external dimension measuring device 3 is a clamping member (not shown) for transferring the work supplied to the chute 7 of the external size measuring device 3 by the unloader 11 to the fixed position. ). The holding member holds one work stopped at the tip of the chute 7 and transfers the work to a fixed position of the external dimension measuring device 3. External dimensions measuring machine 3
Is transferred to the first NC lathe main body 2A
Is inserted into an enlarged shaft having the same structure as that of the chuck and is held at a fixed position.

The work whose outer shape has been measured by the outer size measuring machine 3 is transferred from the unloader 11 to the chute 7 and transferred from the chute 7 to the home position of the second NC lathe main body 2B by the clamping member 8. The second NC lathe main body 2B includes a chuck that clamps the outside of the workpiece supplied to the home position and holds the workpiece at the home position.

The work cut by the second NC lathe main body 2B is transferred to a fixed position of the touch sensor 4 by a transfer means 5 comprising an unloader 11, a chute 7, and a holding member (not shown). The touch sensor 4 includes a chuck that clamps the outer periphery of the workpiece transferred to a fixed position.

As shown in FIG. 3, the external dimension measuring device 3
Enlarged shaft 1 inserted into center hole 9A of work 9 cut by the first NC lathe main body and holding work 9 in a fixed position
0, a light source 13 for irradiating the work 9 held by the chuck with light, a camera 1 for receiving the light emitted from the light source 13 and detecting the outer shape of the work 9 as an image, The shape of the work 9 is calculated from the output signal of the camera 1, and the calculated work shape is compared with the reference shape. A control circuit 12 for outputting a correction signal.

The camera 1 is disposed downward above the work 9 in order to detect the shape of the work 9 as an image. In order for the camera 1 to accurately detect the shape of the work 9, a light serving as a light source 13 is provided on the opposite side of the camera 1, that is, below the work 9. The light emitted from the light passes through the polarizing filter 14 and irradiates the work 9, for example. Further, as shown in the figure, the camera 1 can more accurately detect the shape of the work 9 by disposing a filter 15 for detecting only parallel rays on the lens.

The camera 1 detects the shape of the work 9 in a light and dark image, converts the detected signal into a digital signal by a built-in A / D converter, and outputs the digital signal. Camera 1
, For example, decomposes into 1134 × 972 pixels, and sequentially outputs the brightness of each pixel as a digital signal. Camera 1
If a pixel having a large number of pixels is used, the shape of the work 9 can be detected more accurately.

The control circuit 12 calculates the shape of the work 9 from the signal output from the camera 1 and compares the work shape calculated by the work shape calculation circuit 16 with the reference shape. A circuit 17, a reference shape storage circuit 18 that stores a reference shape and outputs the same to the comparison circuit 17, and a correction signal including a cutting correction amount of the workpiece 9 and a tool replacement signal from the output of the comparison circuit 17. An output circuit 19 for outputting to the NC lathe main body 2A.

The comparison circuit 17 compares the workpiece shape with the reference shape, and calculates the difference between the workpiece shape and the reference shape, that is, the position and depth to be cut. Further, the comparison circuit 17
Compares the workpiece shape with the reference shape, and also determines whether to replace the blade from the difference. Whether the blade is to be replaced or cut and corrected to the reference shape is determined from the difference between the workpiece shape and the reference shape.

For example, as shown in FIG. 5, a workpiece shape (chain line) is compared with a reference shape (solid line), and an error with respect to the reference shape and a difference in the shape are measured. When the blade wears,
As shown by a chain line in the figure, the outer shape of the work 9 is shifted from the reference shape. The displacement of the reference shape is output to the first NC lathe main body as a correction signal using the position and the displacement amount. Further, as shown in the figure, if there is a shape greatly different from the reference shape, it is determined that the blade is damaged, and a correction signal for replacing the blade or interrupting the cutting is output to the first NC lathe main body 2A.

The reference shape storage circuit 18 stores a reference shape of the workpiece 9 to be cut. The reference shape storage circuit 18 is a hard disk, a floppy disk, an optical disk, a semiconductor memory, or the like. Reference shape memory circuit 18
Can store a plurality of reference shapes, select a reference shape of the workpiece 9 to be cut, and output the selected reference shape to the comparison circuit 17.

The output circuit 19 outputs a program for cutting the work 9 by outputting to the first NC lathe main body 2A from the cutting position and the cutting depth calculated by the comparison circuit 17. Further, when the comparison circuit 17 determines that the cutting tool is replaced or cutting is interrupted, the output circuit 19 creates a program for replacing the cutting tool or interrupting cutting and outputs the program to the first NC lathe main body 2A. I do.

The first NC lathe main body 2A and the external dimension measuring machine 3 of the bearing inner and outer ring cutting device shown in FIG. 2 cut a workpiece according to the following flowchart. [Step S1] The first NC lathe main body 2A cuts the supplied work into a predetermined shape, and the cut work 9 is transferred from the first NC lathe main body 2A to the external dimension measuring machine 3. . [Step S2] Control circuit 12 of external dimension measuring machine 3
Processes a signal input from the camera 1 to calculate a workpiece shape. [Step S3] The control circuit 12 compares the calculated work shape with the reference shape stored in the reference shape storage circuit 18 and calculates the difference. [Steps S4 and S5] It is determined whether or not the difference between the workpiece shape and the reference shape is within a specified range. [Step S6] If it is determined that the workpiece shape is not within the prescribed range with respect to the reference shape, it is determined whether the workpiece shape is such that the blade is replaced or cutting is interrupted. Blade replacement,
Alternatively, the interruption of the cutting is determined based on whether the workpiece shape is larger than the reference shape by a certain dimension, or whether the shape is locally different. For a workpiece having a locally different shape, the blade is replaced or cutting is interrupted. When it is determined that the blade is to be replaced or cutting is interrupted, a program is created and output to the first NC lathe main body 2A. [Step S7] The work 9 is corrected and the cutting amount and position are calculated. The amount to be corrected and cut is calculated based on the difference between the workpiece shape and the reference shape. As the blade wears, the amount of correction and cutting of the work 9 increases. [Step S8] Based on the calculated cutting dimensions, a program for cutting the work 9 by modifying the work 9 with the first NC lathe main body 2A is created. [Step S9] The cutting program is output to the first NC lathe main body 2A, and the first NC lathe main body 2A corrects the cutting amount of the work 9 to be supplied next to an optimum value. The work 9 whose outer shape is measured is transferred to the next step. Then, S
The work 9 is cut by looping to the second step.

In the above steps, the work whose outer shape has been cut is transferred to the second NC lathe main body 2B to cut the inner shape, and the cut work is transferred to the touch sensor 4. As shown in FIG. 7, the touch sensor 4 is inserted into a center hole 9A of the work 9 held at a fixed position by the chuck 20 and measures the inner shape of the work 9.
Then, the inner shape of the work 9 is calculated from the output signal of the contact sensor 21, and the calculated work shape is compared with the reference shape. And a control circuit 22 for outputting a correction signal to the second NC lathe main body 2B.

The contact sensor 21 is provided at the center hole 9 of the work 9.
A is precisely inserted in A in the diameter direction, and the inner shape of the work 9 is measured. The contact sensor 21 can also rotate the work 9 slowly and measure the diameter of the work 9 a plurality of times at a predetermined angle. Further, the position at which the work 9 is inserted into the center hole 9A can be changed, and the inner shape of the work 9 can be measured at a plurality of positions. For the work 9 having the center hole 9A in a columnar shape, the contact sensor 21 is inserted into the center of the work 9,
The inner shape of the work 9 can be measured by measuring the inner diameter of the work 9 at one place. However, for a workpiece having a groove or the like on the inner surface, the contact sensor 21 is inserted at a plurality of locations to measure the inner shape.

The control circuit 22 calculates the internal shape including the diameter and the like of the work 9 from the signal output from the contact sensor 21, and the work shape calculated by the work internal shape calculation circuit 23. , A reference shape storage circuit 18 that stores the reference shape and outputs it to the comparison circuit 17, a cutting correction amount of the work 9, and a tool replacement signal from the output of the comparison circuit 17. NC lathe main body 2B
And an output circuit 19 for outputting to the

The comparison circuit 17 calculates the difference between the workpiece shape and the reference shape, that is,
Correct and calculate the cutting depth. Further, the comparison circuit 1
7 compares the workpiece shape with the reference shape, and also determines whether to replace the blade from the difference. Whether the blade is to be replaced or cut and corrected to the reference shape is determined from the difference between the workpiece shape and the reference shape.

The reference shape storage circuit 18 stores the reference shape of the workpiece 9 to be cut, similarly to the external dimension measuring device 3. The reference shape storage circuit 18 can store a plurality of reference shapes, select a reference shape of the workpiece 9 to be cut, and output the selected reference shape to the comparison circuit 17.

The output circuit 19 outputs a program for cutting the work 9 by outputting to the second NC lathe main body 2B based on the cutting position and the cutting depth calculated by the comparison circuit 17. Further, when the comparison circuit 17 determines that the cutting tool is replaced or cutting is interrupted, the output circuit 19 creates a program for replacing the cutting tool or interrupting cutting and outputs the program to the second NC lathe main body 2B. I do.

The second NC lathe main body 2B and the touch sensor 4 of the bearing inner / outer ring cutting device shown in FIG. 2 cut a workpiece according to the following flowchart. [Step S1] The second NC lathe main body 2B cuts the supplied work 9 into a predetermined inner shape, and the cut work 9 is moved from the second NC lathe main body 2B to the touch sensor 4B.
Is transferred to [Step S2] Control circuit 22 of touch sensor 4
Processes a signal input from the contact sensor 21,
Calculate the work shape. [Step S3] The control circuit 22 compares the calculated work shape with the reference shape stored in the reference shape storage circuit 18 and calculates the difference. [Steps S4 and S5] It is determined whether or not the difference between the workpiece shape and the reference shape is within a specified range. [Step S6] If it is determined that the workpiece shape is not within the prescribed range with respect to the reference shape, it is determined whether the workpiece shape is such that the blade is replaced or cutting is interrupted. Blade replacement,
Alternatively, the interruption of the cutting is determined based on whether the workpiece shape is larger than the reference shape by a certain dimension, or whether the shape is locally different. For a workpiece having a locally different shape, the blade is replaced or cutting is interrupted. When it is determined that the blade is to be replaced or cutting is interrupted, a program is created and output to the second NC lathe main body 2B. [Step S7] The work 9 is corrected and the cutting amount and position are calculated. The amount to be corrected and cut is calculated based on the difference between the workpiece shape and the reference shape. As the blade wears, the amount of correction and cutting of the work 9 increases. [Step S8] On the basis of the calculated cutting dimensions, a program for correcting and cutting the work 9 to be cut next by the second NC lathe main body 2B is created. [Step S9] The cutting program is output to the second NC lathe main body 2B, and the second NC lathe main body 2B corrects the cutting amount of the work 9 to be supplied next to an optimum value for cutting. The workpiece 9 whose inner shape is measured is transferred to the next step. Thereafter, the work 9 is cut by looping to step S2.

In the above cutting device for the inner and outer races of the bearing, the outer shape of the work 9 is measured by the outer size measuring device 3 and then the inner shape is detected by the touch sensor 4. Therefore, there is a feature that both the outer shape and the inner shape of the inner and outer rings of the bearing can be cut into the reference shape. However, the cutting device for the inner and outer races of the bearing of the present invention may be a device that measures the outer shape with the outer size measuring device 3 and does not measure the inner shape.

[0040]

The cutting device for the inner and outer races of the bearing according to the present invention has the advantage that the tact time for cutting one work can be reduced by efficiently and continuously cutting the work with high accuracy. That is, the cutting device of the present invention transfers the workpiece cut by the NC lathe main body to an external dimension measuring machine, measures the external shape of the workpiece with an image using the external dimension measuring machine, and compares the measured workpiece shape with a reference shape. If the workpiece shape deviates from the reference shape by more than a set value, a correction signal is output to the NC lathe main body to correct the cutting amount of the workpiece to be cut next. In particular, since this apparatus measures the outer shape of the work cut by the NC lathe main body with the external dimension measuring device, the outer shape of the work can be measured while cutting the work with the NC lathe main body. Therefore, the tact time can be reduced by cutting the workpiece and measuring the outer shape together. In addition, the apparatus of the present invention measures the outer shape of the work by removing it from the NC lathe main body and setting it on the outer dimension measuring machine.
When transferred from the C lathe main body to the external dimension measuring machine, cutting water and cutting chips adhering to the surface of the work can be removed. For this reason, there is a feature that the external dimension measuring machine can accurately measure the external shape of the work and cut the work to be subsequently cut into an accurate size and shape.

Further, in particular, the apparatus for measuring the outer shape of the work and detecting damage to the blade, and replacing the blade by this means, replaces the blade and cuts it into a reference shape. The feature is that the work can be continuously processed with high precision.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a conventional cutting device for bearing inner and outer rings.

FIG. 2 is a front view showing a bearing inner and outer ring cutting device according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state where a work is held by a chuck of a first NC lathe main body.

FIG. 4 is a schematic front view of the external dimension measuring device shown in FIG. 2;

FIG. 5 is a cross-sectional view showing a state in which a work outer shape is compared with a reference shape

FIG. 6 is a flowchart showing a process of cutting a workpiece by the first NC lathe main body and the external dimension measuring machine shown in FIG. 2;

FIG. 7 is a schematic sectional view of the touch sensor shown in FIG. 2;

FIG. 8 is a flowchart showing a process of cutting a workpiece by the second NC lathe main body and the touch sensor shown in FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Camera 2 ... NC lathe main body 2A ... 1st NC lathe main body 2B
... Second NC lathe main body 3 ... External dimensions measuring machine 4 ... Touch sensor 5 ... Transporting means 6 ... Hopper 7 ... Chute 8 ... Nipping member 9 ... Work 9A ... Center hole 10 ... Enlarged shaft 11 ... Unloader 12 ... Control circuit DESCRIPTION OF SYMBOLS 13 ... Light source 14 ... Polarization filter 15 ... Filter 16 ... Work external shape calculation circuit 17 ... Comparison circuit 18 ... Reference shape memory circuit 19 ... Output circuit 20 ... Chuck 21 ... Contact sensor 22 ... Control circuit 23 ... Work internal shape calculation circuit

Claims (2)

[Claims] An apparatus for cutting an inner and outer ring of a bearing for cutting with a cutting tool by numerical control, wherein the cutting apparatus cuts a workpiece (9) with a cutting tool.
(2), and a work (9) cut by the NC lathe body (2) is supplied, and an external dimension measuring machine (3) for measuring the external shape of the supplied work (9) with light is provided. The dimension measuring machine (3) includes a chuck for holding a work (9) cut by the NC lathe main body (2) in a fixed position, and a light source (13) for irradiating the work (9) held on the chuck with light. And a camera (1) that receives the light emitted from the light source (13) and detects the outer shape of the work (9), and calculates the shape of the work (9) from the output signal of the camera (1). Then, when the calculated workpiece shape is compared with the reference shape and it is determined that the workpiece shape is deviated from the reference shape by a value equal to or more than the set value, the NC lathe main body
(2) is provided with a control circuit (12) for outputting a correction signal, and when the correction signal is transmitted from the external dimension measuring device (3) to the NC lathe main body (2), the NC lathe main body (2) Work with signal (9)
A cutting device for the inner and outer rings of a bearing, wherein the cutting amount of the work (9) is corrected, the cutting of the work (9) is interrupted, or the cutting tool for cutting the work (9) is replaced. 2. A cutting machine for an inner and outer ring of a bearing for cutting with a blade by a numerical control, wherein the cutting device cuts a workpiece (9) with a blade.
(2), a workpiece (9) cut by the NC lathe main body (2) is supplied, and an external dimension measuring machine (3) for measuring an external shape of the supplied workpiece (9) with light, and an NC lathe main body Touch sensor (4) that contacts the inner surface of the work (9) cut in (2), measures the inner shape of the work (9), and outputs a correction signal to the NC lathe main body (2)
The external dimension measuring machine (3) has a chuck for holding the work (9) cut by the NC lathe body (2) in a fixed position, and irradiates the work (9) held on the chuck with light. A light source (13), a camera (1) that receives light emitted from the light source (13) and detects the outer shape of the work (9), and a work (9) based on an output signal of the camera (1). Is calculated, and the calculated work shape is compared with the reference shape. When it is determined that the work shape is deviated from the reference shape by more than a set value, the NC lathe body
(2) is equipped with a control circuit (12) that outputs a correction signal.The external dimension measuring device (3) outputs a correction signal for measuring the external shape of the work (9), and the touch sensor (4) outputs the correction signal for the work (9). The correction signal for measuring the inner shape is transmitted to the NC lathe body (2), and the NC lathe body (2)
Compensates the cutting amount of the work (9) with the correction signal, or interrupts the cutting of the work (9), or
A cutting device for bearing inner and outer rings, characterized by replacing a cutting tool for cutting (9).