JPH04275809A - Machining device for inside of hollow work - Google Patents

Abstract

PURPOSE:To facilitate a machining work such as deburring or chamfering in a hollow portion of a hollow work having a hole opened in the outer peripheral wall. CONSTITUTION:A cutting tool 6 is disposed in a hollow portion 2 of a hollow work W, and a motor 7 is disposed outside the hollow work W. A tool main body 9, the end portion of which is like a truncated cone, that is rotatably supported, is provided on the cutting tool 6, and a shaft 16 connected to a rotor is provided on the motor 7. The shaft 16 and the cutting tool 6 are engaged with each other through a hole 3 of the hollow work W, so that the tool 6 brought into contact with the open edge of the hole 3 is rotated by the motor 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing apparatus for processing a hollow workpiece having a hollow part surrounded by an outer circumferential wall.

0002

2. Description of the Related Art Conventionally, a hollow workpiece shown in FIG. 4 having a hollow portion surrounded by an outer circumferential wall has been put into practical use. The outer peripheral wall 1 is provided with a hole 3. The hole 3 is opened by passing a drill through the outer peripheral wall 1 from the outside thereof. Furthermore, when the hole 3 is opened, burrs are generated inside the hollow portion 2 at the opening edge 4 of the hole 3, so a file or reamer must be inserted into the hollow portion 2 after the hole 3 is opened. , the deburring work was performed by reciprocating or rotating cutting motions within the hollow portion 2.

0003

[Problems to be Solved by the Invention] However, when the diameter and length of the hollow part 2 of the hollow workpiece W are small,
During the deburring work, the outer peripheral wall 1 obstructs the operation of the file or reamer and the flexibility of the polishing angle, making it difficult to efficiently remove burrs, especially hair burrs, generated on the opening edge 4. This was one of the causes of reduced deburring work efficiency and increased processing costs.

The present invention has been made in view of such conventional problems, and provides a hollow structure that makes it possible to easily carry out processing operations such as deburring inside the hollow space after drilling holes in the outer peripheral wall. The purpose is to provide a processing device for the inside of a shaped workpiece.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a hollow workpiece having an outer circumferential wall in which a hole is formed and a hollow portion surrounded by the outer circumferential wall. In the apparatus for performing processing operations such as deburring on the opening edge of the hole, the processing part has a cutting member disposed within the hollow part and facing the opening edge, and an outside of the hollow workpiece. and a drive section that is arranged and causes the cutting member to perform a cutting motion. Further, the drive section has a drive shaft that can be inserted into the hole in the outer circumferential wall and causes the cutting member to perform a cutting movement through the hole, and further includes a drive shaft that is inserted into the hole in the outer peripheral wall and causes the cutting member to perform a cutting movement through the hole. A receiving portion for receiving the drive shaft is provided on the back side. Further, the cutting member has a cutting part that is non-perpendicular to the outer peripheral wall and is rotatably supported by the processing part,
In addition, the drive shaft is configured to rotate.

[0006]

[Operation] In the apparatus for processing the inside of a hollow workpiece having the above structure, the cutting member is brought into contact with the opening edge of the hole in the hollow part, and the cutting member is caused to perform a cutting movement by the driving section. When the cutting motion is performed, the burr generated at the edge of the opening when the hole is opened is cut away. Therefore, as long as the processing portion has an external dimension that can be placed within the hollow portion, deburring work inside the hollow workpiece can be performed. Also,
Since the processing section does not have a driving means for causing the cutting member to perform a cutting motion, the outer dimensions can be made smaller.

[0007] Furthermore, since the drive section has a drive shaft that can be inserted into the hole in the outer circumferential wall and causes the cutting member to perform a cutting motion through the hole, the drive section and the processing section can be connected to each other. can be formed separately, and the processing section can be further miniaturized. In addition, if it is possible to bring the cutting member into contact with the opening edge in opposition to the opening edge, the drive shaft may be inserted through the hole, that is, regardless of the external shape of the processing portion. By loosely inserting the cutting member into the hole, the cutting member can be caused to perform a cutting movement. Moreover, the structure of the processing section and the driving section is not complicated, and the operation thereof is simple.

Furthermore, since a receiving portion for receiving the drive shaft is provided on the back surface side of the cutting member facing the opening edge, the hole extends from one of the opposing circumferential walls to the other circumferential wall. In the case of penetrating through the deburring section, the cutting member can be caused to perform a cutting motion from both the one (other) peripheral wall having the opening edge on the side on which the deburring work is performed and the other (one) peripheral wall.

On the other hand, when the cutting member has a non-perpendicular cutting portion on the outer circumferential wall and is rotatably supported by the processing portion, and the drive shaft is rotatable, the rotational operation of the cutting member is Accordingly, the cutting portion cuts a tapered surface on the edge of the opening.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. That is, the hollow workpiece W to be processed in this embodiment has an outer circumferential wall 1 having a circular cross section and a hollow portion 2 surrounded by the outer circumferential wall 1, as described above with reference to FIG. 1 is provided with a hole 3,
The hole 3 is opened by passing a drill through the outer peripheral wall 1 from the outside thereof. Note that the hollow workpiece W has a small diameter such that the inner diameter of the hollow portion 2 is φ8.5 mm.

On the other hand, as shown in FIG. 1, the hollow workpiece W is fixed to a mounting table 20 provided on a base (not shown). Further, a processing device 5 inside the hollow workpiece that performs a processing operation on the opening edge 4 of the hole 3 in the hollow section 2 is equipped with a cutting tool 6, which is a processing section disposed inside the hollow section 2, and It is composed of a motor 7, which is a drive section, arranged outside the workpiece W. The cutting tool 6 is movably supported by the base and has an arbor 8 extending from the base into the hollow part 2 of the workpiece W,
A blade body 9, which is a cutting member, is provided on the tip side of the arbor 8.

The end side of the blade main body 9 facing the opening edge 4 has a substantially truncated conical shape, and a first engagement groove 10 is formed in the end surface as shown in FIG. A blade 11, which is a cutting portion forming an acute angle with respect to the inner circumferential surface of the outer circumferential wall 1, is formed in a portion corresponding to the circumferential surface of the truncated cone. Further, the blade body 9 has a shaft 12 on the back side of the blade 11, and the shaft 12 is inserted through the arbor 8, so that the blade body 9 is rotatable. The shaft 12
A clasp 13 is attached to the arbor 8, and a distal end surface 14 of the shaft 12 protruding from the arbor 8 has, as shown in FIG.
A second engaging groove 15 having the same shape as the first engaging groove 10 and serving as a receiving portion is formed.

Further, the motor 7 is fixed to a movable base 21 which can be moved as appropriate, and the rotor of the motor 7 (not shown)
A shaft 16, which is a drive shaft, is connected to the shaft 16. The shaft 16 has a diameter that allows it to be loosely inserted into the hole 3, and an engagement convex portion 17 that engages with the second engagement groove 14 of the shaft 12 is formed at its tip. Note that the motor 7
The cutting tool 6 is positioned such that the centers of the blade main body 9, the hole 3, and the shaft 16 are located on the same line.

In the above structure, the blade 6 is moved and the blade body 9 comes into contact with the opening edge 4 in the hollow portion 2, as shown in FIG. On the other hand, the motor 7
When the shaft 16 is moved in the work direction (arrow A direction in FIG. 1), the shaft 16 is loosely inserted into the hole 3, and the shaft 1
The engagement protrusion 16 of No. 5 engages with the first engagement groove 10 . Thereafter, when the motor 7 is activated, the shaft 16 rotates (arrow B in FIG. 1) and the blade body 9 rotates.
is driven to rotate. That is, it is driven to make a cutting motion. Accordingly, when opening the hole 3, the hollow part 2
The burrs generated on the inner opening edge 4 are cut by the blade 11 of the blade main body 9, and deburring work is performed.

Therefore, in the processing device 5 for processing inside the hollow workpiece, if the cutting tool 6 has an external dimension that can be placed inside the hollow part 2, deburring inside the hollow workpiece W is possible. In addition, since the cutting tool 6 does not have a driving means for causing the blade body 9 to perform a cutting movement, the outer dimensions can be made smaller. Therefore, even if the dimensions and shape of the hollow part 2 in the hollow workpiece W are small and it is difficult to remove burrs using a file or a reamer (especially work to remove hair burrs), the above-mentioned parts in the hollow part 2 can be easily removed. Burrs generated on the opening edge 4 can be removed, and as a result, work efficiency can be improved and product processing costs can be reduced.

Further, since the motor 7 has a shaft 16 that can be inserted into the hole 3 of the outer peripheral wall 1 and rotates the blade body 9 through the hole 3, the motor 7
and the cutting tool 6 can be formed separately, and the cutting tool 6 can be further miniaturized. Further, as long as the blade body 9 can be opposed to and contacted with the opening edge 4, the shaft 16 can be inserted into the blade body 9 through the hole 3, regardless of the external shape of the blade 6. can be rotated. Therefore, it is possible to perform deburring work even on a hollow workpiece having a hollow portion with a complicated shape.

In addition, as mentioned above, the cutting tool 6 and the motor 7 can be made separately, and the structure and operation of both are extremely simple, so that deburring work in the process of machining a hollow workpiece can be easily performed. Can be easily automated. Therefore, the number of work steps that require manual labor can be reduced, and this also makes it possible to reduce the processing cost of the product.

Furthermore, a blade body 9 facing the opening edge 4
Since the second engagement groove 15 for receiving the shaft 16 is provided on the back side of the hollow work W, as shown in FIG. 1
When penetrating from a to the other 1b, both the above 1
The blade main body 9 can be rotated from the sides a and 1b. Therefore, when automating the deburring work, it is possible to increase the degree of freedom in the arrangement positions of the cutting tool 6 and the motor 7 and in the work procedure.

Further, the blade main body 9 is rotatably supported by the cutting tool 6, the blade 11 forms an acute angle with the outer peripheral wall 1, and the blade main body 9 cuts the opening edge 4 by rotational movement. Because it has a structure, the blade body 9
A tapered surface is formed on the opening edge 4 by the blade 11 due to the rotational movement. Therefore, in the processing device 5 inside the hollow workpiece, it is possible to perform the chamfering work as well as the deburring work described above. Furthermore, as is clear from the above description, the blade body 9 rotatably supported by the cutting tool 6 can be easily removed. It becomes possible to carry out deburring work, chamfering work, etc. according to the requirements.

In the above embodiment, only the case where the motor 7 rotates the blade body 9 by the shaft 16 is shown, but the invention is not limited to this, and the blade body 9 can be caused to perform other cutting movements such as reciprocating motion. You can do it like this. Depending on the shape of the hollow workpiece W and the diameter or shape of the hole 3 formed in its outer peripheral wall, the blade body 9, which is the cutting member, may be directly driven by the motor 7, which is the driving part, without using the shaft 16. It may be driven to cut. Of course, something other than the motor 7 may be used as the drive unit.

[0021]

Effects of the Invention As explained above, in the present invention, in a hollow workpiece having a hollow portion surrounded by an outer circumferential wall having a hole, a processed portion disposed in the hollow portion and a and a drive section disposed outside of the shaped workpiece, and the drive section moves the cutting member of the processing section into a cutting motion, thereby performing deburring, etc., on the opening edge of the hole in the outer peripheral wall in the hollow part. I started doing processing work. Therefore, as long as the processing section has an external dimension that allows it to be placed inside the hollow section, deburring work can be carried out inside the hollow workpiece, and the processing section is designed to allow the cutting member to perform cutting motion. Since it does not have a driving means, its external dimensions can be made smaller. Therefore, even if the size and shape of the hollow part of a hollow workpiece is small and it is difficult to remove burrs using a file or a reamer (especially removing hair burrs), it is easy to cause deburring to occur at the opening edge in the hollow part. burrs can be removed,
As a result, it becomes possible to improve work efficiency and reduce product processing costs.

[0022] In addition, when the drive section has a drive shaft that can be inserted into the hole and causes the cutting member to perform a cutting motion through the hole, the drive section and the processing section are formed separately and the processing is carried out. The unit can be further downsized. Therefore, it is possible to perform deburring work even on a hollow workpiece having a hollow portion with a complicated shape. Moreover, since the structure and operation of both of the above are extremely simple, deburring work in the manufacturing process of hollow workpieces can be easily automated, and the number of work processes that require manual labor can be reduced. becomes.

Furthermore, in the case where a receiving portion for receiving the drive shaft is provided on the back side of the cutting member facing the opening edge, and the hole penetrates through the opposing walls of the outer circumferential wall, Especially when trying to automate deburring work,
It becomes possible to increase the degree of freedom in the arrangement positions of the processing section and the driving section and the working procedure.

On the other hand, the cutting member provided in the processing section has a cutting portion that is non-perpendicular to the outer circumferential wall of the hollow workpiece, and is rotatably supported by the processing section, and the drive shaft is rotatably operated. In some cases, a tapered surface is formed at the opening edge by the cutting portion due to the rotational movement of the cutting member. Therefore, in addition to performing the deburring work described above, it is possible to perform chamfering work on the edge of the opening.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention.

FIG. 2 is a view taken along arrow A in FIG. 1, showing the cutting tool of the same embodiment.

FIG. 3 is a view taken along arrow B in FIG. 1, showing the cutting tool of the same embodiment.

FIG. 4 is an explanatory diagram showing a second embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of a hollow workpiece.

[Explanation of symbols]

1 Outer peripheral wall 2 Hollow part 3 Hole 5
Processing device inside the hollow workpiece 6 Cutting tool (processing part) 7 Motor (drive part) 9 Blade body (cutting member) 11 Blade (cutting part) 15 Second
Engagement groove (receiving part) 16 Shaft (drive shaft)

Claims (4)

[Claims] 1. Performing a processing operation such as deburring on the opening edge of the hole in the hollow part of a hollow workpiece having an outer circumferential wall in which a hole is formed and a hollow part surrounded by the outer circumferential wall. The apparatus is characterized by having a processing section having a cutting member disposed within the hollow part and facing the opening edge, and a drive section disposed outside the hollow workpiece and causing the cutting member to perform a cutting motion. A processing device inside a hollow workpiece. 2. The hollow spacer according to claim 1, wherein the drive section has a drive shaft that can be inserted into the hole in the outer circumferential wall and causes the cutting member to perform a cutting movement through the hole. Processing equipment inside the shaped workpiece. 3. The apparatus for processing the inside of a hollow workpiece according to claim 2, wherein a receiving portion for receiving the drive shaft is provided on the back side of the cutting member facing the opening edge. 4. The cutting member has a cutting portion that is not perpendicular to the outer peripheral wall, and is rotatably supported by the processing portion, and the drive shaft is rotatably operated. Or the hollow workpiece processing apparatus according to 3.