JPH01115509A - Machining tool - Google Patents

Abstract

PURPOSE:To enable machining of a valve seat, in a machine tool for mono-block engine, by coupling a drive shaft inserted through a valve guide hole with a tool at the tip of a machining head inserted into a cylinder bore then driving the drive shaft. CONSTITUTION:A mono-block engine W is set on a supporting table, then a machining head 11 is inserted into a cylinder bore 4 through movement of a machining head supporting table in the direction of an arrow C so as to face a tool 5a with a valve seat section 3. Then the drive shaft 15a of a drive shaft unit 15 is inserted through a valve guide hole 14 into the cylinder bore 4 so as to couple a fitting section 23 with a fitting hole 22a. When the drive shaft unit 15 rotates to drive the tool 5a, the work supporting table is moved in the direction of an arrow A in order to cut a valve seat. Upon finish of the cutting process, the unit 15 and head 11 are retreated to pressure insert the valve seat and valve guide into the valve seat and the valve guide hole 14, then reaming is applied in the similar sequence.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a processing device for processing a hollow article, for example, a valve seat in a monoblock engine in which a cylinder head and a cylinder block are integrated. It is related to.

(Prior Art) Generally, when processing the valve seat or surface of the valve seat in an engine in which the cylinder head and cylinder block are configured separately, the cylinder head and the cylinder block are processed as shown in FIG. 1′
Since the valve seat portion 3' is in an open state, the valve seat seat or valve seat surface has been directly machined using a processing tool 5'.

(Problems to be Solved by the Invention) In recent years, the development of a monoblock engine W in which a cylinder head part l and a cylinder block part 2 are integrated as shown in FIG. When processing the inside of a hollow article, that is, processing the valve seat portion 3 of the monoblock engine W, the valve seat portion 3
If the inclination angle with respect to the cylinder bore 4 is large, a problem arises in that the machining tool 5 and the cylinder bore 4 interfere with each other, making it impossible to perform machining.

The present invention has been made in view of the above points, and an object of the present invention is to enable easy and accurate processing of the inside of a hollow article.

(Means for solving the problems) In the present invention, as means for solving the above problems,
A processing device for processing the inside of a hollow article includes a processing head configured to be inserted into the cavity of the hollow article, and a processing head rotatably supported at the tip of the processing head for processing the inside of the hollow article. a processing tool configured to be movable in the direction of a rotation center line of the processing tool through a through hole formed in the hollow article, and to be engaged with the engaged portion of the processing tool; A driving means is provided having an engaging portion which can be engaged and which operates to rotate the machining tool when engaged.

(Function) In the present invention, the following effects can be obtained by the above means.

That is, after inserting a processing head equipped with a processing tool configured to process the inside of the hollow article and having an engaged portion into the hollow portion of the hollow article and opposed to the processing position, the processing head is formed into the hollow article. By coupling the driving means inserted through the through hole with the processing tool, the processing tool can be driven. Therefore, the inside of the hollow article can be processed easily and accurately.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The processing apparatus of this embodiment takes a monoblock engine W in which a cylinder head part l and a cylinder block part 2 are integrated as an example of a hollow article, and processes the valve seat part 3 of the monoblock engine W (for example,
This is for processing the valve seat seat or surface of the valve seat (see Fig. 1), and as shown in Fig. 4, the monoblock engine W, which is the workpiece to be processed, is placed and fixed in a positioned state. A workpiece support 6 and a monoblock engine W positioned on the workpiece support 6
a processing head support 7 that is movably provided at a position on the side of the cylinder bore 4 (corresponding to the hollow part of the hollow article);
A drive means support stand 8 is provided at a position to the side of the cylinder head portion 1 of the monoblock engine W positioned on the workpiece support stand 6, and is movably provided.

The workpiece support 6 is movable along guide rails IO and 10 provided on the base 9 in the direction of the arrow hole and B in FIG.

The machining head support 7 is provided with a machining head 11 configured to selectively attach and detach a machining tool 5a for machining the valve seat seat or a machining tool 5b for machining the valve seat surface. The head If is positioned on the workpiece support 6 as the processing head support 7 moves forward and backward in the direction of arrow C or D in FIG. 4 along the guide rail 13.13 provided on the base 12. It can be inserted into or withdrawn from the cylinder bore 4 of the monoblock engine W. The processing tool 5 a, 5
Hexagonal hole-shaped fitting holes 22a and 22b, which serve as engaged portions, are formed at the center of rotation b.

The cylinder head portion of the monoblock engine W positioned on the workpiece support base 6 is mounted on the drive means support base 8! It is configured so that it can be inserted into the cylinder bore 4 through the valve guide hole 14 (corresponding to a through hole of a hollow article), and can be coupled with the machining tool 5a or 5b of the machining head 11 inserted into the cylinder bore 4. A drive shaft unit that acts as a drive means! 5 (see FIG. 1), and a valve guide hole of the monoblock engine W located at a position adjacent to the drive shaft unit 15 (that is, a position adjacent to the direction perpendicular to the advance/retreat direction of the drive means support base 8). 1
A movable base 18 is provided with a reamer unit 17 for reaming the inner circumferential surface of the valve guide 16 (see FIG. 3) press-fitted into the valve guide 16 (see FIG. A working motor 19 is provided. The drive means support stand 8 is connected to the base stand 9.
It is movable in the direction of arrow E or F in FIG. 4 along guide rails 10, 10 provided above, and
The movable table 18 is moved along the guide rails 20 and 20 provided on the drive means support table 8 in the direction of arrow G or ■ in FIG.
It is said to be movable in four directions. Further, the drive shaft unit 15 and reamer unit 17 and the motor 19 are connected via a belt 21.

The drive shaft 15a at the tip of the drive shaft unit 15 has a fitting hole 22a or 22b for the processing tool 5a or 5b.
A hexagonal column-shaped fitting portion 23 that becomes an engaging portion that is fitted into the
is formed, and by fitting the fitting portion 23 into the fitting hole 22a or 22b, the processing tool 5a or 5b and the drive shaft unit 15 are coupled.

On the other hand, at the tip of the reamer processing blade 17a of the reamer unit 17, a guide hole 24 is formed coaxially with the fitting hole 22b of the processing tool 5b (valve seat surface processing tool). A guide rod 25 that can be fitted into the housing extends integrally therewith (see FIG. 3).

Note that the machining blade portion 27 of the machining tool 5b is rotatably supported by the base portion 28 via a bearing 26.

Next, the operation of the illustrated processing device will be explained.

First, a procedure for processing a valve seat on the valve seat portion 3 (see FIG. 1) in a monoblock engine W will be described.

As shown in FIG. 1, after the monoblock engine W has been positioned and set on the work support stand 6, the processing head has a processing tool 5a for processing the valve seat seat attached to the tip! 1 is inserted into the cylinder bore 4 of the monoblock engine W by moving the machining head support base 7 in the direction of arrow C (see FIG. 4), and the machining tool 5a is placed opposite the valve seat portion 3. Thereafter, the movable base 18 is moved in the direction of arrow H (see FIG. 4), the drive shaft unit 15 and the valve guide hole 14 of the monoblock engine W are opposed to each other, and the drive means support base 8 is moved in the direction of arrow E (see FIG. 4). 1 and 4) direction, the drive shaft unit 15
The drive shaft 15a is inserted into the cylinder bore 4 through the valve guide hole 14, and the fitting portion 23 of the drive shaft 15a and the fitting hole 22a of the processing tool 5a are fitted together to couple them. By doing so, the machining tool 5a can be driven as the drive shaft unit 15 is rotated by the driving force of the motor 19.

In this state, while moving the workpiece support 6 in the direction of arrow A (see FIGS. 1 and 4), the drive shaft unit 1
By rotating the machining tool 5a by means 5, the valve seat portion 29 is cut and formed on the valve seat portion 3. When the cutting process is finished, the drive shaft unit 15
The processing head 11 is then moved backward in the direction of arrow F or D, respectively.

Next, after press-fitting and fixing the valve seat 30 and the valve guide 16 into the valve seat part 29 and the valve guide hole 14 of the monoblock engine W, which have been formed by cutting the valve seat part 29 in the above process, the valve seat 30 and the valve guide 16 are respectively press-fitted and fixed. The procedure for performing valve seat surface processing and valve guide reaming processing on the valve guide 16 will be explained.

First, the machining tool 5a at the tip of the machining head 11 is replaced with the machining tool 5b for machining the valve seat surface, the machining head support 7 is moved in the direction of arrow C (see Fig. 4), and the machining head 11 is repositioned into the cylinder bore. 4, and as shown in FIG. 2, the processing tool 5b is placed opposite the valve seat 30. Thereafter, by moving the drive means support base 8 in the direction of arrow E (see FIGS. 2 and 4), the fitting portion 23 at the tip of the drive shaft 15a in the drive shaft unit 15 is removed.
and the fitting hole 22b of the processing tool 5b are fitted together to couple them together. By doing this, the motor 19
The machining tool 5b can be driven as the drive shaft unit 15 is rotated by the driving force.

In this state, while moving the workpiece support 6 in the direction of arrow A (see FIGS. 2 and 4), the drive shaft unit 1
The valve seat surface 31 is formed on the valve seat 30 by cutting the processing tool 5b by rotating the processing tool 5b. When the cutting process is completed, the workpiece support 6 is moved slightly backward (that is, moved in the direction B in FIG. 4), and the monoblock engine W is moved slightly backward.
By moving the drive means support base 8 in the direction of arrow F, the drive shaft unit 15 is operated backward.

Thereafter, by moving the movable base I8 in the direction of arrow G in FIG. 4, the drive shaft unit I5 and reamer unit 17 are
Shifting the position of the fuel unit 17 and the valve guide 16 of the monoblock engine W, and moving the driving means support stand 8 in the direction of arrow E (see FIGS. 3 and 4). Accordingly, reamer unit 17
The guide rod 25 at the tip is passed through the valve guide 16 and inserted into the guide hole 24 of the processing tool 5b.

Then, while guiding the guide rod 25 into the guide hole 24, the reamer unit 17 (in other words, the driving means support base 8) which is being driven by the motor I9 is moved to the arrow E.
(see FIGS. 3 and 4), and the inner peripheral surface of the valve guide 16 is reamed using the blade portion I7a of the reamer unit 17. By doing so, the concentric precision between the valve seat surface 31 formed on the valve seat 30 and the valve guide 16 is improved. Thus, when the reaming of the valve guide I6 is completed, the reamer unit 17 and the processing head 11 are moved backward in the direction of the arrow F or D, respectively.

As described above, according to this embodiment, the processing tool 5a is used to perform valve seat processing or valve seat surface processing on the valve seat portion 3 of the monoblock engine W.
Alternatively, the machining head If with 5b is connected to the cylinder bore 4.
By connecting the drive shaft 15a of the drive shaft unit 15, which is inserted into the cylinder head fltlEI of the monoblock engine W from the outside through the valve guide hole 14, to the processing tool 5a or 5b,
Therefore, the valve seat seat or valve seat surface can be processed easily and accurately using the processing tool 5a or 5b. Further, according to this embodiment, when reaming the valve guide 16, the tip of the reamer unit 17 is inserted into the guide hole 24 formed in the center of the processing tool 5b used for processing the valve seat surface. By fitting and guiding the extended guide rod 25, it is possible to significantly improve the concentricity accuracy between the valve seat surface 31 formed on the valve seat 30 and the valve guide 16.

It goes without saying that the present invention is not only applicable to processing the valve seat seat or valve seat surface for the monoblock engine in the above embodiments, but also to various processing for the interior of other core articles. .

Furthermore, it goes without saying that the present invention is not limited to the configuration of the above-described embodiments, and that the design can be changed as appropriate without departing from the gist of the invention.

(Effects of the Invention) As described above, according to the present invention, a processing device for processing the inside of a hollow article includes a processing head configured to be insertable into a cavity of the hollow article, and a processing head configured to be inserted into a cavity of the hollow article; A processing tool rotatably supported at the tip, configured to process the inside of a hollow article, and having an engaged portion; an engaging portion configured to be movable and capable of engaging with an engaged portion of the processing tool, and a driving means that acts to rotate the processing tool when engaged, the processing head being moved into the hollow space. After being inserted into the hollow part of the article and opposed to the processing position, the driving means inserted through the through hole formed in the hollow article is coupled to the processing tool, thereby making it possible to drive the processing tool. This has the excellent effect that the interior of the hollow article can be easily and accurately processed.

[Brief explanation of the drawing]

1 to 3 are sectional views of main parts showing the operation mode of the processing device according to the embodiment of the present invention, FIG. 4 is a perspective view showing the entire processing device according to the embodiment of the present invention, and FIG. 6 and 6 are cross-sectional views illustrating the procedure for machining the valve seat portion of a split-type cylinder head and monoblock engine using a conventional machining device. 4...Cavity part (cylinder bore) 5 a, 5
b...Processing tool II...Processing head 14...Through hole (valve guide hole) 15...
... Drive means (drive shaft unit) 22a, 22b ・
・Engaged part (fitting hole) 23...Engaging part (fitting part) W...Hollow article (monoblock engine)

Claims (1)

[Claims] 1. A processing device for processing the inside of a hollow article, comprising a processing head configured to be insertable into the cavity of the hollow article, and rotatably supported at the tip of the processing head,
A processing tool configured to process the inside of a hollow article and having an engaged portion; and a processing tool configured to be movable in the direction of a rotation center line of the processing tool through a through hole formed in the hollow article, and the processing tool A processing device comprising: an engaging portion that can engage with an engaged portion of a tool; and driving means that operates to rotate the processing tool when engaged.