JP3405601B2 - Opening edge processing equipment for through holes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for processing an opening edge of a through hole, which is a burr generated on the back surface side when a through hole is formed in a workpiece, particularly non-planar (three-dimensional). This is effective when removing burrs on the periphery and chamfering the opening edge of the through hole.

[0002]

2. Description of the Related Art Conventionally, an invention described in JP-A-5-116025 is known as a processing apparatus for removing burrs from through holes opened in a workpiece and chamfering the opening edges of the through holes. ing.

In this device, a main shaft having a working tool at its tip and a drive motor are connected via a universal joint. Then, after inserting the processing tool into the through hole of the workpiece, the spindle is pressed from the side surface. By this pressing against the main shaft, the processing tool was able to rotate in a substantially conical shape while tilting with the universal joint as the base point, and to process the peripheral edge of the through hole.

Further, this conventional device can be shown as shown in FIG. 9 when the structure is simplified and illustrated. In FIG. 9, the through hole (1) has a radius of R ₀ and a depth of D ₀ . Further, (2) is a universal joint, and point O is a fulcrum of the universal joint (2). Also, (3)
Is the pressing means and point P is the point of action of the pressing means (3). Further, (4) is a machining tool, and point Q indicates a machining position. Also,
The distance between the fulcrum O of the universal joint (2) and the operating point P of the pressing means (3) is A _0, and the operating point P of the pressing means (3) is
The interval between the machining position Q of the machining tool (4) and the machining position Q is B ₀ . The interval B ₀ is the minimum interval at which the pressing means (3) and the workpiece (5) do not come into contact with each other. When formed in this way, the machining tool (4) is rotated with an inclination angle θ _{0 from} O as a base point, and comes into contact with the opening edge (6) on the back surface side of the through hole (1).

[0005]

However, in the above-mentioned device, since the pressing means (3) is located between the universal joint (2) and the working tool (4), the working tool is
The inclination angle θ ₀ of (4) cannot be adjusted to a larger value than a certain angle for the following reason. Therefore, when the inclination angle θ ₀ of the machining tool (4) is small and the machining dimension is large, the rotational movement must be repeated, and the efficiency of the machining work was reduced.

That is, even in the conventional device, theoretically, the fulcrum O of the universal joint (2) and the pressing means (3) are used.
If the point of action P of is close to the machining position Q, the inclination angle θ ₀ of the machining tool (4) can be increased. However, the interval B ₀
Must be dimensioned so that the pressing means (3) and the work piece (5) do not come into contact with each other, and the pressing means (3) having a certain size is processed together with the fulcrum O of the universal joint (2). Since it is not possible to approach the position Q side indefinitely,
There is a limit to increase the inclination angle θ ₀ of the working tool (4). As a result, the efficiency of the machining work is reduced, which is troublesome.

The present invention is intended to solve the above-mentioned problems, and when performing the working operation of the opening edge of the through hole of the workpiece, the inclination angle of the working tool is set as compared with the conventional working apparatus. It is intended to be formed into a large size to improve the workability of deburring and chamfering, and to perform simple working work.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention locates a turning tool body on a base which can be moved back and forth with respect to a workpiece, and A processing tool is connected to the tip of the rotary shaft so as to be rotatable, and a pressing means capable of pressing the rotary shaft in a direction intersecting the axis of the rotary tool body is circumferentially provided on the outer periphery of the rotary tool body. A plurality of them are formed at a fixed interval on the machining tool side of the pressing means, and a pivotal support portion for supporting the pivoting tool body to the base is provided on the machining tool side. The work tool can be tilted with respect to the workpiece, and the rotating tool main body is sequentially pressed by the pressing means in the circumferential direction, whereby the working tool can be rotationally moved in a tilted state with the shaft support portion as a fulcrum.

According to another aspect of the invention, a chuck for holding a workpiece is formed so as to be movable back and forth with respect to a base, and a rotary tool main body is positioned on the base, and the rotary tool main body is A processing tool is connected to the tip of the rotary shaft so as to be rotatable, and a pressing means capable of pressing the rotary shaft in a direction intersecting the axis of the rotary tool body is circumferentially provided on the outer periphery of the rotary tool body. A plurality of them are formed at a fixed interval on the machining tool side of the pressing means, and a pivotal support portion for supporting the pivoting tool body to the base is provided on the machining tool side. The work tool can be tilted with respect to the workpiece, and the rotating tool main body is sequentially pressed by the pressing means in the circumferential direction, whereby the working tool can be rotationally moved in a tilted state with the shaft support portion as a fulcrum.

The rotary tool body may be formed by a hand grinder.

Further, the pressing means may be formed on an outer peripheral frame formed on the outer periphery of the rotating tool main body with an outer peripheral interval therebetween.

Further, six pressing means may be formed in the circumferential direction at an angle of 60 °.

The pressing means may be formed by connecting a pressing rod to the tip of the cylinder.

The pressing means may be formed by connecting a pressing rod to the tip of the solenoid.

Further, the pressing means senses a reaction force received by the machining tool in contact with the workpiece in correspondence with the shape of the machined portion of the workpiece, and adjusts the pressing force to correspond to the shape of the machined portion. Then, the processing tool may be moved.

[0016]

Since the present invention is constructed as described above,
In order to perform the working operation of the through hole opened in the work piece, first, the turning tool body on the base is activated, and the working tool at the tip of the turning shaft is turned. This processing tool can be formed by a cutting tool, a grinding tool, or a polishing tool, which is formed to have a smaller diameter than the through hole of the workpiece. Further, the through-hole of the workpiece gripped by the chuck is located in the front end direction of the processing tool so as to face it.

Next, a working tool is inserted into the through hole of the workpiece. In this insertion method, the base may be moved toward the workpiece, or the chuck for holding the workpiece may be moved toward the base.

Further, in this method of inserting the working tool, all the pressing means located behind the shaft supporting portion are simultaneously actuated to uniformly press the outer periphery of the rotating tool main body, and the working tool is inserted into the shaft core of the through hole. The process is performed until the tip of the processing tool projects to the back surface side of the through hole in the state of being positioned above. In this way, by operating all the pressing means at the same time, the machining tool does not tilt, so there is no chance of accidentally hitting the work piece strongly or contacting the work piece and damaging it. , Smooth insertion is possible.

After inserting the machining tool, a plurality of pressing means located on the outer periphery of the rotating tool body are sequentially operated in the circumferential direction to press the rotating tool body in the direction intersecting the axis. In this case, when one of the pressing means is performing the pressing operation, the other pressing means located opposite to each other is in the non-pressing state. In this way, when the rotary tool body is pressed from one side, the machining tool is tilted with the shaft support portion as the base point.

Then, the processing tool is rotationally moved in an inclined state with the shaft supporting portion as a fulcrum by a plurality of pressing means sequentially pressing in the circumferential direction. Since the rotational movement of this machining tool is performed in the through hole of the work piece, if the through hole of the work piece is circular, the machining tool only has the conical flared tip side on the back surface of the through hole. It is possible to remove burrs that come into contact with the side of the through hole and to form a burr on the back surface side of the through hole, or to chamfer the opening edge.

Further, since the shaft supporting portion of the rotating tool body is formed between the processing tool and the pressing means, it is not necessary to provide a pressing means of a certain size on the workpiece side of the shaft supporting portion, and the processing tool The space between the shaft support and the shaft support can be formed small. Therefore, as compared with the conventional method in which the pressing means is provided between the working tool and the universal joint, the working tool is greatly inclined and the inclination angle can be formed to be large. For this reason, the processing capacity is significantly improved, and even when the thickness of the burr to be removed is large or when a large chamfer is going to be processed, the processing can be performed with a small rotational movement, and a simple processing work can be performed. Become.

Next, in order to pull out the machining tool from the through hole of the workpiece for which the machining operation has been completed, first the actuators of all the pressing means are simultaneously actuated so that the rotating tool main body is made uniform in the central direction of the pressing means. Press. By this pressing,
The processing tool is located on the axis of the through hole and cancels the inclined state.

Then, the chuck or the base of the workpiece is moved in the opposite direction to the insertion of the through hole, and the machining tool is extracted from the through hole of the workpiece. Further, when the processing tool is extracted, the rotation of the rotation shaft may be stopped,
If the rotation axis is kept rotating, when the next workpiece is machined, there will be no need to wait for restarting and stopping the rotating tool body, which speeds up the machining work. You can improve the property.

By adjusting the pressing movement amount of the pressing means, the working tool can freely change the inclination angle and adjust the rotation diameter. Therefore, if the diameter of the processing tool is smaller than the diameter of the through hole of the workpiece, it is possible to process the opening edges of the through holes of various diameters using a processing tool with one type of diameter. Enables efficient processing work. Further, in this case, the smaller the diameter of the working tool, the larger the inclination angle can be, but it is a premise that the working tool must have a diameter within a range in which the strength of the working tool can be maintained.

If the through hole of the workpiece is not circular, the amount of pressing movement of the plurality of pressing means and the pressing timing are adjusted to form the rotational movement shape of the processing tool into an arbitrary shape. The tip of the processing tool can be rotated and moved along the peripheral edge of the through hole, and it is possible to process an opening edge having a complicated three-dimensional shape such as a horse's club shape.

If the rotating tool body is formed by a hand grinder, the structure can be simplified and an inexpensive device can be obtained by using the existing rotating tool.

Further, if the pressing means is formed on the outer peripheral frame provided on the outer periphery of the rotating tool main body with an outer peripheral interval therebetween, the pressing means can be stably positioned on the outer periphery of the rotating tool, and it is possible to ensure the reliability. Processing work becomes possible.

If six pressing means are formed in the circumferential direction at an angle of 60 °, a small number of pressing means can be arranged in good balance, and a stable pressing operation can be obtained at low cost. .

If the pressing means is formed by connecting the pressing rod to the tip of the cylinder, a large amount of pressing movement can be obtained by using a cylinder with a large stroke.
It is possible to form a large radius of rotational movement of the processing tool. Also, by adjusting the pressure of the pressurized fluid, it becomes possible to easily adjust the pressing force.

Further, if the pressing means is formed by connecting the pressing rod to the tip of the solenoid, an electric signal with a small time lag can be used and the working tool can be operated accurately.

Further, the pressing means can detect the reaction force received by the machining tool in contact with the workpiece in correspondence with the shape of the machined portion of the workpiece and adjust the pressing force to correspond to the shape of the machined portion. If the tip of the processing tool corresponds to the shape of the workpiece different from the pressing movement amount adjusted by the pressing means in advance, the processing tool corresponding to the different shape can be moved. The pressing means detects the reaction force of the object and adjusts the pressing force. Therefore, the tip of the processing tool is rotated and moved in accordance with the opening edge of the through hole of the workpiece, and it is possible to perform the working operation of the opening edge having a complicated three-dimensional shape.

[0032]

Embodiments of the present invention will be described below with reference to the drawings. (10) is a base, which is slidably formed on a track (11) as shown in FIG. By connecting with an advancing / retreating means (12) such as an air cylinder provided at one end, advancing / retreating movement is possible. In addition, the base (10) has a pair of columns (13) projecting from each other with a constant space. Also, this post (1
3) Between, turning tool body (14) such as hand grinder
And the turning tool body (14) is connected to the shaft support (15) provided at the tip of the column (13).

The shaft support portion (15) forms a ring-shaped shaft support body (16) as shown in FIG.
First, a first support shaft (17) and a second support shaft (18) that intersect each other in the axial direction are formed. Also, in FIG. 2, one support shaft
(17) is located horizontally, while the spindle (18) is located vertically. On the other hand, the one end of the support shaft (17) has its inner end
It is pivotally supported on (16) and the outer end is fixed to the column (13).
On the other hand, the other support shaft (18) has an outer end portion on the shaft support body (16).
And the inner end is pivotally connected to the sleeve (20) fixed to the outer peripheral surface of the rotary tool body (14). When formed in this manner, the turning tool body (14) can be inclined with a conical locus with respect to the work piece (21) with the shaft support (15) acting as a universal joint as a fulcrum. .

The turning tool main body (14) is connected to the working tool (22) at the tip of a turning shaft (not shown) as shown in FIG. A cutting tool, a grinding tool, or a polishing tool can be used as the processing tool (22).

Further, the turning tool body (14) has a shaft support (1
An outer peripheral frame (24) is located on the outer periphery rearward of (5) with an outer peripheral spacing (23). This outer frame (24) is a column on both sides.
It is fixed to (13) and is movable together with the rotating tool body (14). In addition, the outer peripheral frame (24) is formed in a hexagonal shape as shown in FIG. 3 in one example, and the pressing means is provided at intervals of 60 °.
(25) are formed at six locations in the circumferential direction. If formed in this way, the pressing means (25) can be arranged in a good balance with a small number, so that a stable pressing operation can be obtained at low cost. Further, in the above description, the pressing means (25) is formed at six places, but if more pressing means (25) are formed, the working operation can be performed more smoothly.

This pressing means (25) has a pressing rod (28) at the tip of an actuator (26) such as cylinders operated by a pressurized fluid such as oil or pressurized air, or solenoids operated by an electric signal. Connect and form. Then, the pressing rod (28) is extended in a direction intersecting with the axis of the turning tool body (14), so that the sleeve (2
The outer peripheral surface of 0) can be pressed. In addition, the actuator (26) needs a spring (30) for causing the pressing rod (28) to contract and move when the pressurized fluid has a constant pressure or less, or in a non-excited state. Built in accordingly.

As shown in FIGS. 1 and 4, the outer peripheral frame (24) has a bracket (31) in the same circumferential direction as the pressing means (25).
Fixedly protruding, and adjusting screw at the tip of this bracket (31).
(32) is screwed and fixed. And this adjusting screw (32)
Connect one end of the tension bar (27) to the
The other end of 7) is connected to a fixing screw (33) screwed and fixed to the rear end surface of the sleeve (20). And the tension bar (27)
In order to adjust the pulling force of the tension screw, the adjusting screw (32) is rotated to move back and forth to adjust the extension state of the tension springs (27) to uniformly adjust the tension forces of all the tension springs (27). .

When formed in this way, the rotary tool body (1
4), since the tension springs (27) pull each other in the outer peripheral direction, they are urged toward the center of the outer peripheral frame (24). Therefore, when the pressing means (25) is stopped and the pressing rod (28) is contracted and moved, the rotating tool main body (14) moves quickly in synchronization with the contraction of the pressing rod (28), and therefore it is adjacent. By sequentially operating the actuators, the machining tool (22) smoothly performs a conical movement with the shaft support (15) as a base point.

Further, (34) is a chuck which faces the processing tool (22) and enables holding of the workpiece (21).

A workpiece to be processed in the above-mentioned structure
To process the back side of the through hole (35) of (21),
First, the turning tool body (14) on the base (10) is activated to rotate the working tool (22). The processing tool (22) can be formed by a cutting tool, a grinding tool, or a polishing tool that is formed to have a diameter smaller than that of the through hole (35) of the workpiece (21). Further, in the direction of the tip of the processing tool (22), the through hole (35) of the workpiece (21) gripped by the chuck (34) is formed.
It is located facing.

Next, the advancing / retreating means (12) is operated to move the base.
Move (10) in the direction of the workpiece (21) and
Insert 2) into the back side of the through hole (35) until the tip projects. In addition, this insertion actuates the actuators (26) of all the pressing means (25) and uniformly presses the outer peripheral surface of the sleeve (20) with the pressing rod (28), and the rotating tool body (1
4) is performed at the center of the outer peripheral frame 24.

By doing so, the working tool (22) rotates on the same axis as the axis of the through hole (35) even if the turning tool body (14) is operated. Therefore, when the work tool (22) is inserted into the through hole (35), the work tool (22) may accidentally pierce the work piece (21) by mistake, or may come into contact with the work piece (21) to cause damage to both. Without, smooth insertion is possible.

After inserting the working tool (22), the actuators (26) of the plurality of pressing means (25) located on the outer circumference of the rotary tool body (14) are sequentially operated in the circumferential direction to press the pressing rod.
The turning tool body (14) is moved to the work piece (21) by (28).
It is pressed in a direction intersecting the axis of the through hole (35). This pressing method is performed as follows.

For example, when the through hole (35) is circular,
First, the actuator (26) of the first pressing means (25) is operated to press and move the rotating tool body (14) by the first pressing rod (28). This pressing is performed against the pulling force of the first pulling bar (27) located in the same circumferential direction as the pressing means (25).

Next, the actuator (26) of the second pressing means (25) adjacent to the first pressing means (25) is gradually operated to resist the pulling force of the second pulling bar (27). do it,
The rotating tool body (14) is gradually pushed by the second pushing rod (28). Simultaneously with this pressing, the first actuator (26) is gradually weakened and stopped, and the first pressing rod (2)
The pressing of the rotating tool body (14) by 8) is gradually released.

With the release of this pressing force, the rotating tool body (1
4) restores and moves in the pulling direction of the first pulling bar (27). In this case, the pressing force (28) of each actuator (26) to the rotating tool body (14), the amount of pushing out, and the like are the same.

In this way, the turning tool body (14) is
The working tool (22) is inclined with the shaft support (15) as a base point by the pressing of the pressing means (25). And processing tool (22)
The plurality of pressing means (25) rotate conically in an inclined state with the shaft support (15) as a fulcrum by the pressing force sequentially generated in the circumferential direction.

Since the rotational movement of the machining tool (22) is carried out in the through hole (35) of the workpiece (21), the workpiece
If the through hole (35) of (21) is circular, the processing tool (22)
Contacts the back side of the through hole (35) only with the side of the tip that spreads conically. Therefore, the processing tool (22) has a through hole.
Remove the burrs on the back side of (35), or through holes (3
Chamfering of the opening edge (36) of 5) can be performed, and a simple working operation of the through hole becomes possible.

Further, in the apparatus for processing the opening edge of the through hole of the present invention, the shaft support portion (15) of the rotating tool body (14) is formed between the processing tool (22) and the pressing means (25). , Shaft support
It is possible to form a small gap between the processing tool (22) and the shaft support (15) without providing a large pressing means (25) on the side of the workpiece (21) of (15). Therefore, as shown in FIG. 6, when the through hole (35) having the radius R ₁ and the depth D ₁ of the through hole (35) is processed, the processing tool (22) is different from the conventional method shown in FIG. Can be formed to have a large inclination, and the inclination angle θ ₁ can be formed larger than θ ₀ . Therefore, the processing capacity is significantly improved and a simple processing operation becomes possible.

Further, the processing tool (22) has a pressing means (25).
It is also possible to make the inclination angle θ ₁ of the working tool (22) small by adjusting the pressing movement amount S ₁ of the actuator (26) to be small. Therefore, if the diameter of the processing tool (22) is smaller than the diameter of the through hole (35) of the workpiece (21), the processing tool (22) of one kind of diameter is used to penetrate various holes. It becomes possible to perform the processing work of the hole (35), which enables inexpensive and efficient processing work. In this case, the smaller the diameter of the machining tool (22), the more the inclination angle θ
_{Although 1} can be taken large, it is a prerequisite that the diameter must be within a range in which the strength of the processing tool (22) can be maintained.

[0051] Further, the working tool (22), as shown in FIG. 7, because it is possible to bring the fulcrum O of the shaft support (15) to the workpiece (21), the inclination angle theta ₂ of the conventional methods 9 also be formed on the same theta _0, the radius R of the conical trajectory of the working tool (22)
₂ can be reduced, and a through hole (35) having a radius R ₂ smaller than the radius R ₁ shown in FIG. 6 can be processed.

As shown in FIG. 8, the working tool (22) has the same inclination angle θ ₂ as θ ₀ in FIG.
The distance B ₂ between the fulcrum O of the shaft support portion (15) and the machining position Q is defined as the fulcrum O of the universal joint (2) and the machining position Q of FIG.
If it is formed in the same manner as the distance A ₀ + B ₀ with the through hole (3) having a depth D ₂ deeper than the depth D ₀ of the workpiece (5) shown in FIG.
The processing work of 5) becomes possible.

When the through hole (35) of the work piece (21) is not circular, the pressing movement amount and the pressing timing of the actuators (26) of the plurality of pressing means (25) are adjusted to perform the processing. If the rotational movement shape of the tool (22) can be made to follow an arbitrary shape, the tip of the processing tool (22) will rotate and move along the non-circular peripheral edge of the through hole (35), as shown in FIG. As described above, it is possible to perform the work of processing the opening edge (36) having a complicated three-dimensional shape such as a horse's club shape.

The pressing means (25) is attached to the work piece (21).
The reaction force received by the machining tool (22) in contact with the workpiece corresponding to the shape of the machining portion of the work piece (21) is adjusted, and the pressing force can be adjusted. ) Can be moved, the tip of the processing tool (22) is
The work piece whose (25) is different from the previously adjusted pressing movement amount
Even in the case of the shape of (21), the pressing means (25) senses the reaction force of the workpiece (21) corresponding to the different shape,
Adjust the pressing force. Therefore, the tip of the processing tool (22) can be rotationally moved following the opening edge (36) of the through hole (35) of the workpiece (21), and of course the circular opening edge (36). Thing, the opening edge (36) of the complicated shape which makes a three-dimensional shape
The processing work of is also reliable.

The reaction force sensing method by the pressing means 25 can be obtained from the pressurized fluid of the cylinders used as the actuator 26 or the electric signal of the solenoids.

Next, the work piece (21) which has been processed
In order to pull out the machining tool (22) from the through hole (35), the actuators (26) of all the pressing means (25) are simultaneously actuated, and the rotating tool body (14) is evenly moved by the pressing rod (28). Press on. By this pressing, the rotating tool body (14) is positioned at the center of the outer peripheral frame (24), the machining tool (22) is released from the inclined state, and is positioned at the axis of the through hole (35) to rotate. To do.

Then, the advancing / retreating means (12) is operated in the opposite direction to the above to move the base (10) away from the workpiece (21) to move the machining tool (22) to the workpiece (21). ) Through hole (3
Remove from 5). Therefore, the processing tool (22) has no risk of coming into contact with the through hole (35) at the time of extraction,
It is possible to prevent the occurrence of scratches on (35). Further, the turning tool main body (14) may stop the turning of the machining tool (22) at the time of taking out, but if the turning tool body (14) is continuously taken out and taken out, the next workpiece (21) In the machining work of), the waiting time for restarting, stopping, etc. is not required, and the machining work can be speeded up and the workability can be greatly improved.

Further, in the above embodiment, the base 10 is formed so as to be movable back and forth with respect to the workpiece 21. However, in another method, the chuck (34) for holding the work piece (21) may be formed so as to be movable back and forth with respect to the processing tool (22).

[0059]

The present invention is constructed as described above, and since the shaft supporting portion of the rotating tool body is formed between the processing tool and the pressing means, the distance between the processing tool and the shaft supporting portion can be reduced. You can Therefore, the working tool can have a large inclination angle, and the working capacity is significantly improved. Therefore, as compared with the conventional method, a through hole having a smaller diameter or a deep through hole can be processed, and a simple processing operation can be performed.

[Brief description of drawings]

FIG. 1 is a side view of a device for processing an opening edge of a through hole with a part cut away.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

4 is a cross-sectional view taken along the line CC of FIG.

FIG. 5 is a perspective view showing a partially transparent state of an example of a workpiece.

FIG. 6 is a conceptual diagram of a working example in which a working tool is formed with a large inclination angle of the working tool.

FIG. 7 is a conceptual diagram of a working example in which a working tool is formed with a small inclination angle to perform a working operation.

FIG. 8 is a conceptual diagram of the present embodiment in which a through hole having a deep depth is processed by a processing tool having a small inclination angle.

FIG. 9 is a conceptual diagram of a conventional method.

[Explanation of symbols]

10 bases 14 Rotating tool body 15 Shaft support 21 Workpiece 22 Processing tools 23 Perimeter spacing 24 outer frame 25 Pressing means 28 Push rod 34 chuck

Claims (8)

(57) [Claims] 1. A turning tool body is located on a base that can be moved back and forth with respect to a workpiece, and the turning tool body can be turned by connecting the working tool to the tip of a turning shaft of the turning tool body. At the same time, a plurality of pressing means capable of pressing the rotating shaft in a direction intersecting the axis of the rotating tool body are formed on the outer periphery of the rotating tool body at regular intervals in the circumferential direction. Is also provided on the machining tool side with a pivotal support portion that supports the pivoting tool body to the base, and the pivoting tool body can be tilted with respect to the workpiece with this pivotal support portion as the base point, and the circumferential pressing means is used. An opening edge processing device for a through hole, characterized in that the processing tool can be rotationally moved in an inclined state with a shaft support as a fulcrum by sequentially pressing the rotating tool body. 2. A chuck for holding a work piece is formed so as to be movable back and forth with respect to a base, a rotary tool main body is positioned on the base, and a tip of a rotary shaft of the rotary tool main body. A machining tool is connected to the rotary tool so as to be rotatable, and pressing means capable of pressing the rotary shaft in a direction intersecting the axis of the rotary tool main body is provided on the outer periphery of the rotary tool main body at regular intervals in the circumferential direction. A plurality of shafts are formed on the machining tool side of the pressing means to connect the pivoting tool body to the base, and the pivoting tool body is used as a base point for the pivoting tool body with respect to the workpiece. And a tilting means for circumferentially pressing the rotating tool body in order to allow the working tool to rotate and move in a tilted state with the shaft support as a fulcrum. . 3. The device for processing an opening edge of a through hole according to claim 1, wherein the rotating tool body is formed by a hand grinder. 4. The apparatus according to claim 1, wherein the pressing means is formed on an outer peripheral frame formed on the outer periphery of the rotary tool main body with an outer peripheral interval therebetween. 5. The opening edge processing device for a through hole according to claim 1, wherein the pressing means is formed in a circumferential direction at an angle of 60 °. 6. The apparatus for processing an opening edge of a through hole according to claim 1, wherein the pressing means is formed by connecting a pressing rod to the tip of the cylinder. 7. The apparatus for processing an opening edge of a through hole according to claim 1, wherein the pressing means is formed by connecting a pressing rod to the tip of the solenoid. 8. The pressing means senses a reaction force received by a machining tool in contact with the workpiece in correspondence with the shape of the machined portion of the workpiece, and adjusts the pressing force to correspond to the shape of the machined portion. The apparatus for processing an opening edge of a through hole according to claim 1 or 2, wherein the processing tool can be moved.