JPH07148646A - Cutting machining device - Google Patents

Abstract

PURPOSE:To enable even a beginner to easily discriminate the cutting capacity of a cutter so as to prevent cutting with a cutter lowered in the cutting capacity. CONSTITUTION:Pockets P1-P4, PF, PR are respectively formed at four circumferential places of a sleeve 6 and at covers 9A, 9B for closing the sleeve 6. The pressure of lubricating oil in the pockets P1-P4, PF, PR is detected, and on the basis of the pressure change of each pocket, a controller C computes three components-of-force of cutting resistance applied to a grinding wheel 10. These three components of force are displayed on a display panel 36 so as to enable a worker to easily recognize the cutting resistance applied to the grinding wheel 10. Even a beginner can thereby discriminate the grinding state of the grinding wheel 10 easily on the basis of the grinding resistance value displayed on the display panel 36. This results in preventing a workpiece from being ground using the grinding wheel 10 lowered in the grinding capacity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for detecting a cutting state (grinding state) of a tool (for example, a grindstone).

[0002]

2. Description of the Related Art Generally, in a grinding machine, when the grindstone is clogged, spilled, crushed, or worn, the grinding resistance abnormally increases and adversely affects the work surface of the workpiece. It is not possible to obtain the surface roughness and dimensional accuracy of. That is, if the grindstone is clogged,
Its grinding ability is reduced. Therefore, when the grindstone is clogged or the like, the grindstone is dressed or the grindstone is exchanged for grinding.

Whether or not the grinding ability of the grindstone is lowered is determined by the operator by observing the state of the work surface of the work. That is, when the work surface of the work is rough or burned, the operator dresses the grindstone or replaces the grindstone. Further, even if the grindstone is cut by a predetermined amount, if the work size of the work is small, it is determined that the grindstone is worn, and in this case also, the operator dresses the grindstone or replaces the grindstone.

[0004]

As described above, the operator determines the clogging of the grindstone by observing the machined surface of the work. It is difficult for beginners who have no knowledge to determine whether the grinding ability of the grindstone has deteriorated simply by looking at the processed surface of the work.
Further, even a skilled person cannot discriminate unless the machined surface of the work is grinded after grinding the work. Therefore, at least a part of the work is roughened or burned, which adversely affects the work. This is a serious problem especially when grinding a work by automatic processing. That is, when a workpiece is ground by automatic processing (automation), the operator inspects the condition of the grinder at every predetermined time, so the grinding ability of the grindstone decreases before the operator comes to the inspection. There is a case. Therefore, in this case, the work is processed while the grinding ability of the grindstone remains low.

The present invention has been made in order to solve the above problems, and its purpose is to enable even a beginner to easily determine the cutting ability of a blade and prevent cutting with a blade having a reduced cutting ability. The object is to provide a cutting device capable of doing the above.

[0006]

In order to achieve the above-mentioned object, in the invention described in claim 1, a rotary shaft having a blade attached to its tip is supported by a bearing body so as to be positively rotatable, and a coaxial bearing body is provided. Formed on the bearing body in a cutting device in which a fluid is pressure-fed to a plurality of pockets formed on the inner surface and static pressure is generated between the rotary shaft and the bearing body to smoothly rotate the rotary shaft. The gist of the present invention is to provide a fluid pressure detecting means that is connected to each of the pockets and detects the fluid pressure in each pocket.

According to a second aspect of the invention, there is provided a cutting resistance calculating means for calculating a cutting resistance applied to the cutting tool based on a change in the fluid pressure in each pocket detected by the fluid pressure detecting means. Use as a summary.

According to a third aspect of the present invention, there is provided a blade separating means for separating the blade from the work when the cutting resistance calculated by the cutting resistance calculating means exceeds a preset cutting resistance. This is the gist.

The invention according to claim 4 is characterized in that a display means for displaying the cutting resistance value calculated by the cutting resistance calculation means is provided. In the invention according to claim 5, the gist is that a plurality of the pockets are formed in the circumferential direction of the bearing body facing the outer peripheral surface of the rotating shaft.

The gist of the invention according to claim 6 is that the pocket is formed on the inner end surface of the bearing body facing the end surface of the rotating shaft. In the invention according to claim 7, a rotary shaft having a blade attached to its tip is supported by a bearing body such that the rotary shaft can positively rotate, and a plurality of pads are interposed in the circumferential direction between the rotary shaft and the bearing body. The gist of the present invention is to provide a pad pressure detecting means for detecting the contact pressure between the pad and the rotary shaft during cutting.

The gist of the invention according to claim 8 is that the blade is a grindstone.

[0012]

According to the invention described in claim 1, when the fluid is pumped to each pocket, a static pressure is generated between the rotary shaft and the bearing body. As a result, the sliding resistance between the rotary shaft and the bearing body is reduced, and the rotary shaft rotates smoothly with respect to the bearing body. At this time, the fluid pressure detecting means detects the fluid pressure in each pocket.

According to the second aspect of the invention, the cutting resistance applied to the cutting tool is calculated by the cutting resistance calculating means based on the change in the fluid pressure in each pocket detected by the fluid pressure detecting means.

According to the third aspect of the invention, the cutting resistance calculated by the cutting resistance calculating means during grinding of the workpiece is
When the preset cutting resistance is exceeded, the blade separating means separates the blade from the work. Here, by setting the set cutting resistance to be lower than the cutting resistance applied to the blade when the work surface of the workpiece is roughened or burned,
It is possible to prevent the work from being ground by a cutting tool having a reduced cutting ability.

According to the invention described in claim 4, since the cutting resistance value calculated by the cutting resistance calculating means and applied to the blade is displayed on the display means, even a beginner can easily recognize the state of the cutting ability of the blade. .

According to the fifth aspect of the invention, since the plurality of pockets are formed in the circumferential direction of the bearing body facing the outer peripheral surface of the rotating shaft, the main component force of the cutting resistance applied to the cutting tool and the back force are increased. It becomes possible to detect the component force.

According to the sixth aspect of the invention, since the pocket is formed on the inner surface of the bearing body facing the end surface of the rotary shaft, the feed force component force (axial component force) of the cutting resistance applied to the blade is provided. ) Can be detected.

According to the seventh aspect of the invention, the pressure applied to each pad from the rotating shaft is detected by the pad pressure detecting means. It is possible to detect the cutting resistance applied to the blade based on the pressure applied to the pad.

In the invention described in claim 8, since the grinding resistance applied to the grindstone can be detected, it is possible to easily determine whether or not the grinding ability of the grindstone has deteriorated.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a surface grinder will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a saddle 2 is arranged on the bed 1. The saddle 2 reciprocates in the front-back direction (left-right direction in FIG. 2) on the bed 1 by a drive mechanism (not shown). A table 3 is arranged on the saddle 2. The table 3 is an electromagnet, and the work W is fixed by its electromagnetic force.
The table 3 reciprocates on the saddle 2 in the left-right direction in FIG. 1 by a drive mechanism (not shown). A column 4 is erected on the back side of the bed 1, and a spindle head 5 is engaged with the column 4. The spindle head 5 moves up and down with respect to the column 4 as the spindle head driving motor 17 is driven.

As shown in FIG. 3, a sleeve 6 is inserted and fixed to the spindle head 5. The rotary shaft 8 is inserted through the rotary shaft insertion hole 7 of the sleeve 6, and both ends of the rotary shaft 8 are inserted into the sleeve 6.
From the covers 9A and 9B that close the openings at both ends. The sleeve 6 and the covers 9A and 9B form a bearing body. A grindstone 10 as a blade is attached to the front end of the rotary shaft 8. The rear end of the rotary shaft 8 is connected to the motor 11 fixed to the column 4. Therefore, the rotary shaft 8 and the grindstone 10 rotate as the motor 11 is driven.

As shown in FIGS. 3 and 4, pockets P1, P2, P3 and P4 having a radius of curvature larger than that of the rotary shaft insertion hole 7 are formed on the inner surface of the sleeve 6 as the rotary shaft insertion hole. 7 are formed at four places in the front and rear at equal intervals in the circumferential direction. The front and rear pockets P1 to P4 are connected by a communication passage 12 formed between the rotary shaft 8 and the rotary shaft insertion hole 7. In this embodiment, the pocket formed on the upper portion of the sleeve 6 in FIG.
Hereinafter, in FIG. 4, each movement in the clockwise direction is referred to as a second pocket P2, a third pocket P3, and a fourth pocket P4.
Further, on the surface of each of the covers 9A and 9B facing the end surface of the rotary shaft 8, an annular front pocket PF and a rear pocket P are formed.
Each R is formed.

Lubricating oil as a fluid is pressure-fed to each of the pockets P1 to P4, PF and PR by a pump (not shown). In addition, each pocket P1 to P4, P
An oil discharge path (both not shown) for discharging the lubricating oil pumped from the pump to the drain tank is connected to F and PR. That is, from the pump 13 to the pockets P1 to P
By feeding the lubricating oil to 4, PF, PR, static pressure is applied between the rotary shaft 8 and the sleeve 6 and the covers 9A, 9B, and the rotary shaft 8 can rotate smoothly.

Couplers 15 are screwed onto the outer periphery of the sleeve 6 at four locations. The coupler 15 and the front pockets P1 to P4 of the sleeve 6 are communicated with each other via a static pressure detection path 16. Pressure sensors S1 to S4 are detachably attached to the couplers 15, respectively. In addition, the coupler 15 is also provided at two locations on the outer circumference of the front cover 9A.
Are screwed together. The coupler 15 and the pockets PF and PR formed in the covers 9A and 9B are also communicated with each other via the static pressure detection path 16. The coupler 15 screwed to the front cover 9A has a pressure sensor SF,
SR is detachably attached.

The pressure sensors S1 to S4, SF and SR are pockets P1 to P4, PF and P which are pumped from the pump 13.
The pressure of the lubricating oil in R is detected, and the detection signal is output to the controller 31.

Next, the electrical configuration of this embodiment will be described with reference to the block diagram of FIG. The controller C is composed of a central processing unit (CPU) 31, a ROM 32 for storing control programs and the like, a RAM 33 for storing calculation results and the like. The pressure sensors S1 to S4, SF and SR are connected to the input side of the CPU 31. Each of the pressure sensors S1 to S4, SF, SR detects the hydraulic pressure in the pockets P1 to P4, PF, PR corresponding to itself and outputs a detection signal corresponding to the hydraulic pressure to the CPU 31.

On the other hand, the grindstone driving motor 11 is connected to the output side of the CPU 31 via a motor driving circuit 34a. The grindstone driving motor 11 rotates based on an output signal from the CPU 31. A display panel 36 is connected to the output side of the CPU 31 via a display panel drive circuit 35. As shown in FIGS. 1, 2 and 5, the display panel 36 has three display screens and displays the resistance value of the cutting resistance applied to the grindstone 10. The CPU 31 applies the main component force Ft of the cutting resistance acting in the tangential direction of the outer periphery of the grindstone 10 to the first display screen 36a of the display panel 36, and the back force component acting in the radial direction of the grindstone 10 to the second display screen 36b. Fn
Further, the feed direction component force Fs acting in the axial direction of the grindstone 10 is displayed on the third display screen 36c.

The CPU 31 includes the pressure sensors S1 to S.
4, each pocket P based on the input signals from SF, SR
1 to P4, PF, recognize the pressure value of the lubricating oil in PR.
Then, the CPU 31 causes the pockets P1 to P4, PF, P
Based on the pressure change in R, each component value is displayed on each display screen 36a to 36c of the display panel 36.

Here, each component force Ft, Fn, F of the grinding resistance
The relationship between s and the pressure of the lubricating oil in each of the pockets P1 to P4, PF and PR will be described with an example. For example, grindstone 1
When 0 is not in contact with the work W, the cutting resistance does not act on the grindstone 10, so that each of the pockets P1 to P1
The pressure value of the lubricating oil in P4, PF and PR does not change. Therefore, in this case, the CPU 31 causes the display screens 36a to 36a to
Display “0 kg” in c. Further, for example, in FIG. 6, when the work W is ground without feeding the table 3, cutting resistance is applied to the grindstone 10. The cutting resistance at this time is divided into a main component force Ft and a back component force Fn.

The main component force Ft acts in the direction of the alternate long and short dash line in FIG. Therefore, in this case, since the grindstone 10 and the rotary shaft 8 try to move to the left side in the figure with respect to the sleeve 6, the interval between the second pocket P2 and the rotary shaft 8 becomes narrower, and the second pocket P2 becomes smaller. The pressure in P2 rises.
On the contrary, since the distance between the fourth pocket P4 facing the second pocket P2 and the rotating shaft 8 is widened, the fourth pocket P4
The pressure inside drops. CPU31 is pocket P2, P4
Of the main component force F on the first display screen 36a based on the pressure change of
Display t.

On the other hand, the back force Fn at this time acts in the direction of the chain double-dashed line in FIG. Therefore, in this case, since the grindstone 10 and the rotary shaft 8 try to move upward in the figure with respect to the sleeve 6, the gap between the first pocket P1 and the rotary shaft 8 becomes narrower, and the first pocket P1 The pressure inside rises. On the contrary, the third that faces the first pocket P1
Since the distance between the pocket P3 and the rotary shaft 8 increases, the pressure in the third pocket P3 decreases. The CPU 31 displays the second display screen 36 based on the pressure change in the pockets P1 and P3.
The back force Fn is displayed on b.

Further, as shown in FIG. 7, when the table W is fed to grind the work W, the main component force F is
In addition to t and back force Fn, force in the feed direction Fs
Act on. The component force Fs in the feed direction acts in the direction of the chain line in FIG. Therefore, in this case, since the grindstone 10 and the rotary shaft 8 try to move to the right in the figure with respect to the sleeve 6, the distance between the rear pocket PR and the rear end face of the rotary shaft 8 becomes narrower, The pressure in the side pocket PR increases. On the contrary, since the distance between the front pocket PF facing the rear pocket PR and the front end surface of the rotating shaft 8 increases, the pressure in the front pocket PF decreases. The CPU 31 displays the feed direction component force Fs on the third display screen 36c based on the pressure change in the pockets PF and PR.

The ROM 32 stores a set main component force αFt, a set back component force αFn, and a set feed direction component force αFs. Each set component force αFt, αFn, αFs is obtained in advance by experiments or the like. The actual component forces Ft, Fn, Fs acting on the grindstone 10 are the set component forces αFt, α
When the work W is ground in a state of exceeding Fn, αFs, the ground surface of the work W is roughened or seized, which adversely affects the ground surface.

During the work grinding, the CPU 31 calculates the component force Ft, Fn, Fs of the actual grinding resistance as the set component force αFt, αF.
When n and αFs are exceeded, the spindle head lifting motor 17 is driven to forcibly separate the grindstone 10 from the work W, the grindstone driving motor 11 is stopped, and the grinding operation is interrupted. Further, when the CPU 31 interrupts the grinding operation, each component force F at the time of the interruption
Numerical values of t, Fn, Fs are displayed on each display screen 3 of the display panel 36.
6a to 36c are held as they are displayed. Further, even when the predetermined grinding operation is finished, the numerical values of the respective component forces Ft, Fn, Fs at the time of the termination are kept displayed on the respective display screens 36a to 36c of the display panel 36 as in the case of the interruption. To do.

Next, the operation of the surface grinder constructed as described above will be described. FIG. 8 is a flowchart showing a control processing routine executed by the CPU 31 of the controller C in this embodiment.

First, in step 101, the CPU 31
Drives the motor 11 to rotate the grindstone 10. In the next step 102, the CPU 31 determines that each pressure sensor S
1 to S4, SF, SR to pockets P1 to P4, P
Input a pressure signal corresponding to the pressure applied to F and PR. In subsequent step 103, the CPU 31 causes the first
The back force Fn is based on the pressure changes of the pockets P1 and the third pockets P3, and the main force Ft is further based on the pressure changes of the second pockets P2 and the fourth pockets P4.
The feed direction component force Fs is calculated based on the pressure changes of the front pocket PF and the rear pocket PR.

In step 104, the CPU 31 determines each component force Ft, Fn, calculated in step 103,
Fs is displayed on each of the display screens 36a to 36c of the display panel 36. At this time, when the grindstone 10 is not yet in contact with the work W, the numerical value displayed on each of the display screens 36a to 36c is "0" kg. After that, when the grinding is started and the cutting resistance is applied to the grindstone 10, the CPU 31 proceeds to step 105, and the pockets P1 to P1
Based on the pressure change in P4, PF, PR, each component force F
t, Fn, Fs are preset component forces αFt, α
It is determined whether Fn and αFs are exceeded.

Here, the CPU 31 determines which component force Ft,
When it is determined that Fn and Fs exceed the set component forces αFt, αFn and αFs, the process proceeds to the next step 106.
On the other hand, any component force Ft, Fn, Fs is set component force αF
When it is determined that t is less than αFn and αFs, the process proceeds to step 107 to continue the grinding operation. And
In step 107, the CPU 31 determines whether or not the grinding is completed, and when it is determined that the grinding is completed, the CPU 31 proceeds to step 109. CPU3 in step 109
6, the component forces Ft, Fn, and Fs displayed on the display screens 36a to 36c of the display panel 36 are retained on the display screens 36a to 36c without being erased, and the subsequent processing is terminated. On the other hand, when it is determined that the grinding has not been completed, the process returns to step 105.

In step 106, the CPU 31 retains the component forces Ft, Fn, Fs displayed on the display screens 36a to 36c of the display panel 36 on the display screens 36a to 36c without erasing them. Then, the CPU 31 moves to step 108, raises the spindle head 5, separates the grindstone 10 from the work W, and then stops the motor 11 in step 109 to end the subsequent processing.

As described above, in this embodiment, the sleeve 6
4 points in the circumferential direction and cover 9 for closing the sleeve 6
Pockets P1 to P4, PF and PR were formed in A and 9B, respectively. Then, the pockets P1 to P4, PF,
The pressure of the lubricating oil in the PR is detected, and each pocket P1 to P
4, the controller C calculates the three-component force of the cutting resistance applied to the grindstone 10 based on the pressure change of the lubricating oil in the PF and PR.

Then, the three component forces are respectively applied to the display panel 36.
Since it is configured to be displayed on the display, the operator can easily visually recognize the cutting resistance applied to the grindstone 10. This allows even a beginner to easily determine the grinding state of the grindstone 10 based on the grinding resistance value displayed on the display panel 36. As a result, the grindstone 10 with reduced grinding ability
Can be used to prevent the work W from being ground.

Further, in this embodiment, the grindstone 10 is used during grinding.
When the grinding resistance value (Ft, Fn, Fs) applied to the grinding wheel exceeds a predetermined grinding resistance value (αFt, αFn, αFs), the grindstone 10 is forcibly separated from the work W. As a result, even if the operator does not always watch the grinding condition while attending the grinder, the grinding wheel 1 with reduced grinding ability
When 0, the work W is not ground. Therefore, in this embodiment, automation can also be supported.

The present invention is not limited to the above embodiments, but may be configured as follows, for example, without departing from the spirit of the invention. (1) In the above embodiment, the surface grinder is embodied, but it may be embodied with various grinders such as a cylindrical grinder and a universal grinder. Further, it may be embodied by a milling machine or a drilling machine that uses a metal blade instead of the grindstone 10 as a blade.

(2) In the above embodiment, any one of the component forces Ft, Fn, Fs during grinding is set by the component components αFt, αFn, α.
The grinding operation is stopped when Fs is exceeded. On the other hand, the grinding operation may be stopped when only the largest back force Fn exceeds the set back force αFn.

(3) When the component force Ft, Fn, Fs of the grinding resistance exceeds the set component force αFt, αFn, αFs, the buzzer sounds or the lamp is turned on to notify the operator of the fact. You may comprise.

(4) Substitute the lubricating oil as a fluid for gas such as air. (5) The pockets P1 to P4 are formed and embodied only in the circumferential direction of the sleeve 6. In this case, component force F in the feed direction
Although s cannot be measured, the grinding using the grindstone 10 has the largest back force Fn, which is different from general cutting. Therefore, the back force Fn that most affects the grinding ability of the grindstone 10 can be measured. You may do it.

(6) In the above embodiment, the static pressure is generated between the rotary shaft 8 and the sleeve 6 as the bearing, and the cutting resistance applied to the grindstone 10 is detected based on the static pressure value. However, this may be configured as shown in FIG.

That is, a pocket 51 is formed on the inner peripheral surface of the sleeve 6, and a leaf spring 52 is arranged in the pocket 51. Then, the pad 53 and the pivot 54 are interposed between the leaf spring 52 and the rotary shaft 8. When the rotary shaft 8 supporting a grindstone (not shown here) moves in the sleeve 6 due to the grinding resistance applied to the grindstone, the leaf spring 52 is deformed according to the moving amount, and the pad 53 can be moved. To do.
In this case, the strain sensor 55 is connected to the leaf springs 52, and the controller calculates the cutting resistance of the grindstone based on the strain difference between the leaf springs 52.

[0049]

As described in detail above, according to the present invention,
The fluid pressure fed into the plurality of pockets formed in the bearing body is detected, and the cutting resistance applied to the blade is detected based on the fluid pressure value. Then, since the cutting resistance is configured to be displayed by the display means,
The excellent effect that even a beginner can easily discriminate the state of the cutting ability of the blade is achieved.

Further, according to the present invention, when a grinding resistance larger than a preset grinding resistance is applied to the blade,
Since the blade is separated from the work, it is possible to prevent the cutting process from being performed by the blade having a low cutting ability. As a result, there is an excellent effect that the work can be always cut with a blade having a high cutting ability.

[Brief description of drawings]

FIG. 1 is a front view of a surface grinder according to an embodiment of the present invention.

FIG. 2 is a side view of a surface grinder.

FIG. 3 is a rotary shaft showing a formation state of pockets and passages;
It is a partial side sectional view of a sleeve and the like.

FIG. 4 is a rotary shaft showing a formation state of pockets and passages;
It is a sectional view of a sleeve and the like.

FIG. 5 is a block diagram showing an electrical configuration of a grinding machine.

FIG. 6 is a front view of a grindstone, a work, and the like showing a relationship between a main component force of grinding resistance and a back force component.

FIG. 7 is a side view of a grindstone, a work and the like showing a relationship between a back force component of grinding resistance and a force component in a feed direction.

FIG. 8 is a flowchart illustrating the operation of the CPU.

FIG. 9 is a front sectional view showing a state in which a rotating shaft is supported by a pad of another example.

[Explanation of symbols]

6 ... Sleeve as bearing body, 8 ... Rotating shaft, 9A ... Front cover forming a part of bearing body, 9B ... Rear cover forming a part of bearing body, 10 ... Whetstone as a blade,
Reference numeral 17 ... Motor for raising / lowering a spindle head which constitutes a tool separating means, 36 ... Display panel which constitutes a display means, P1 ... First
Pocket, P2 ... 2nd pocket, P3 ... 3rd pocket,
P4 ... Fourth pocket, PF ... Front pocket, PR ... Rear pocket, S1 ... First pressure sensor as fluid pressure detecting means, S2 ... Second pressure sensor as fluid pressure detecting means, S3 ... As fluid pressure detecting means Third pressure sensor,
S4 ... Fourth pressure sensor as fluid pressure detecting means, C ...
Controller constituting cutting resistance calculation means, display means and blade separation means, 53 ... Pad, 55 ... Strain sensor

Claims (8)

[Claims] 1. An inner surface of a coaxial bearing body (6, 9A, 9B) in which a rotary shaft (8) having a blade (10) attached to its tip is positively rotatably supported by a bearing body (6, 9A, 9B). The fluid is pressure-fed to the pockets (P1 to P4, PF, PR) formed in plural, and the rotary shaft (8) and the bearing body (6, 9A, 9)
B), in the cutting device that generates a static pressure to smoothly rotate the rotary shaft (8), each pocket (P1 to P1 formed in the bearing body (6, 9A, 9B) P4, PF, PR), and a fluid pressure detecting means (S1 to S4, SF, SR) for detecting the fluid pressure in each pocket (P1 to P4, PF, PR) is provided. Processing equipment. 2. The fluid pressure detecting means (S1 to S4, S)
F, SR) detect each pocket (P1 to P4, PF,
The cutting device according to claim 1, further comprising a cutting resistance calculating unit (C) that calculates a cutting resistance applied to the cutting tool (10) based on a change in fluid pressure in (PR). 3. A blade separating means (17, C) for separating the blade (10) from a work when the cutting resistance calculated by the cutting resistance calculating means (C) exceeds a preset cutting resistance. ) Is provided.
The cutting device described in. 4. The cutting apparatus according to claim 2, further comprising a display unit that displays the cutting resistance value calculated by the cutting resistance calculation unit (C). 5. The pockets (P1 to P4, PF, P)
R) is a bearing body (6, 6) facing the outer peripheral surface of the rotating shaft (8).
9A, 9B) is formed in a plurality in the circumferential direction, the cutting apparatus according to any one of claims 1 to 4. 6. The pockets (P1 to P4, PF, P)
R) is a bearing body (6, 9) facing the end face of the rotating shaft (8).
A, 9B) inner end surface (9A, 9B) is formed, The cutting device in any one of Claims 1-5 characterized by the above-mentioned. 7. A rotary shaft (8) having a blade (10) attached to its tip is supported by a bearing body (6, 9A, 9B) so as to be positively rotatable, and the rotary shaft (8) and the bearing body (6, 9A) are supported. , 9B)
A plurality of pads (53) are provided in the circumferential direction between the pad and the pad and a pad pressure detecting means (55) for detecting a contact pressure between the pad (53) and the rotating shaft (8) during cutting is provided. And cutting equipment. 8. The cutting apparatus according to claim 1, wherein the blade is a grindstone (10).