JPH07112309A - Composite working device - Google Patents

Abstract

PURPOSE:To minimize the number of drive units so as to have a compact size by enabling first and second tools mounted on a tool holder to move freely in the axial direction by means of a drive unit for moving a second tool feed spindle, and allowing both tools to be changed together with the tool holder. CONSTITUTION:In a spindle 10 supported so as not to move relatively in the axial direction and to turn freely in a hollow support member 12 through a bearing 14 a column-like cutting tool feed spindle (first tool feed spindle) 28, reamer mounting spindle (second tool mounting spindle) 30, and reamer feed spindle (second tool feed spindle) 31 are inserted in order from the side of the spindle in a coaxial manner, and in the spindle 28 the spindle 30 is connected to the spindle 31. The tool holder 52 is fixed to the tip of the main spindle 10 so as to be removed freely and a cutting tool (first tool) 56 is mounted on a slider 55 arranged in the radial direction at the holder 52 so as to move freely. A reamer (second tool) 62 fixed to the mounting part 30a of the spindle 30 is inserted into a through-hole 60 formed at the center of the holder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite machining apparatus in which a plurality of tools are provided at different positions in the radial direction around a spindle, and the plurality of tools are slidably mounted in the spindle axis direction.

[0002]

2. Description of the Related Art Conventionally, for example, as a combined machining apparatus having a plurality of tools slidably attached in the direction of the spindle axis and having the plurality of tools simultaneously detachable, for example, Japanese Utility Model Publication No. 3-4776.
As disclosed in Japanese Unexamined Patent Publication (Kokai) No. 1, a second outer shaft and a first inner shaft each having a tool, and a second outer shaft and a second inner shaft respectively connected to the first outer shaft and the first inner shaft. Some have an outer shaft and a second inner shaft. The outer shaft and the inner shaft are moved in the axial direction by a tool feed motor for the outer shaft and a tool feed hydraulic cylinder for the inner shaft. In addition, the structure of the connecting portion of each shaft includes a tubular portion formed on one of the first and second outer shafts and a first ball fitted in a through hole formed in the tubular portion. The pair of outer shafts can be attached to and detached from each other at a position where the outer shaft is engaged with a predetermined recess on the inner shaft and in a state where the inner shaft is engaged with one recess of the outer shaft. Similarly, the first and second inner shafts also have the same configuration, and by selecting the engagement position of the second ball fitted in the through hole,
The first and second inner shafts are detachable from each other.

[0003]

In the case of the above-mentioned conventional technique, there is a problem that a driving device is required for moving a plurality of tools in the axial direction, and the structure of the entire device becomes complicated and large. Moreover, there is a drawback in that the control becomes complicated because it is necessary to control a plurality of drive devices. Also, when attaching and detaching multiple tools at the same time,
For this attachment / detachment, it is necessary to provide the first and second balls, and to form a concave portion or a through hole for engagement therewith, and an attachment / detachment engagement portion is required for each tool, so that the tool holder structure is There was also the problem of complexity.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a combined machining apparatus which has a simple structure, enables efficient use of a driving device, and is easy to control. And

[0005]

SUMMARY OF THE INVENTION According to the present invention, a main shaft driven at a predetermined number of revolutions, a tool holder coaxially removably provided on the main shaft, and a tool holder axially movable in the tool holder. The attached first tool and second tool, the first tool feed shaft attached to the tool holder side to move the first tool in the axial direction of the spindle, and the second tool attached to the tool holder side A second tool mounting shaft that moves the spindle in the axial direction of the spindle, and a second tool feed shaft that is coupled to the second tool mounting shaft base end and moves the second tool mounting shaft in the axial direction of the spindle, Tool feed shaft engaging means for interlocking the first tool feed shaft and the second tool attachment shaft or the second tool feed shaft at a predetermined position during the axial movement of the second tool, and the second tool feed shaft And a drive device for moving the It is a case processing equipment.

According to the present invention, a main shaft driven at a predetermined rotation speed, a tool holder coaxially removably provided on the main shaft, and a first tool attached to the tool holder so as to be movable in the axial direction. And a second tool, a first tool feed shaft attached to the tool holder side for moving the first tool in the axial direction of the spindle, and a second tool attached to the tool holder side to move the second tool in the axial direction of the spindle. A second tool mounting shaft to be moved to, a second tool feeding shaft coupled to the second tool mounting shaft base end part for moving the second tool mounting shaft in the axial direction of the main shaft, and the second tool mounting shaft. Connecting means for connecting the base end portion and the tip end portion of the second tool feed shaft, and the tool holder is detachably attached to the tip end portion and is provided coaxially with the main shaft and slidable in the axial direction and integrally. The rotatable clamp shaft and this Holder connecting means for connecting the shaft and the tool holder, and the first tool feed shaft and the second tool attachment shaft or the second tool feed shaft are interlocked at a predetermined position during the axial movement of the second tool. A composite machining apparatus provided with a tool feed shaft engaging means for causing movement, a drive device for moving the second tool feed shaft in the axial direction, and a clamp actuating device for moving the clamp shaft in the axial direction.

The tool feed shaft engaging means includes a through hole formed in the first tool feed shaft, a locking ball fitted into the through hole and having a diameter larger than the diameter of the through hole, It is a combined machining device comprising an engaging recess formed on the outer peripheral surface of a second tool mounting shaft.

Further, the tool feed shaft engaging means is composed of a locking piece swingably provided on the first tool feed shaft and an engagement recess formed on the outer peripheral surface of the second tool mounting shaft. It is a composite processing device.

[0009]

In the combined machining apparatus of the present invention, both the first tool and the second tool attached to the tool holder are moved in the axial direction by the drive device for moving the second tool feed shaft. Is. Furthermore, the first tool and the second tool provided in this tool holder can be automatically replaced with the tool holder.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the composite processing apparatus of the present invention is applied to an apparatus for processing a valve seat of a cylinder head of an engine will be described in detail below with reference to FIGS. In the combined machining apparatus of this embodiment, a cylindrical main shaft 10 is supported in a hollow support member 12 via bearings 14 so as to be rotatable and non-movable in the axial direction. A pulley 16 is attached to the base end portion of the main shaft 10 protruding from the base end of the support member 12 via a key 15. The pulley 16 and a pulley fixed to an output shaft of a main shaft motor (not shown) are provided with a belt. Twenty is wrapped around. Further, the support member 12 holding the main shaft 10 is attached to the slide 21, and is provided on the base 22 so as to be movable in a direction parallel to the axis of the main shaft 10 by a driving device (not shown).

Inside the main spindle 10, concentrically in order from the main spindle 10 side, a cylindrical tool feed shaft 2 which is a first tool feed shaft.
8, a reamer mounting shaft 30 which is a second tool mounting shaft, and a reamer feeding shaft 31 which is a second tool feeding shaft are inserted. The reamer mounting shaft 30 and the reamer feed shaft 31 are the bite feed shaft 2
In 8, the base end and the tip are connected to each other.

A tool holder 52, which is detachably provided by a bolt 38, is fixed to the tip of the main shaft 10, and the main shaft 10 and the tool holder 52 are integrally rotatably provided. Further, on the tool holder 52, a slider 55 movably attached in a radial direction at a predetermined angle with respect to the axial direction, a bite 56 as a first tool fixed to the slider 55, and a slider 55 Tool holder 52
The cam member 57 is provided so as to project toward the central axis of the base end side. This cam member 57 is provided with
Is fitted into a cam groove 58 formed in the holding member 39 at the tip of the. A concave portion 40 is formed in the holding member 39, and the convex portion 41 of the bite feed shaft 28 is engaged with the concave portion 40 so as to be integrally movable in the axial direction. Further, a through hole 60 is formed in the center of the tool holder 52.
A reamer 62, which is a second tool and is provided coaxially with the main shaft 10 and is fixed to the mounting portion 30 a of the reamer mounting shaft 30, is inserted into the shaft 0.

The spindle 10 and the bite feed shaft 28 are axially movable along a key groove 49 of the spindle 10 by a key 47 fixed to the outer peripheral surface of the bite feed shaft 28, and rotate integrally. Connected as possible. Further, the tool holder 52 and the holding member 39 are axially movable along with a key groove 51a of the tool holder 52 by a key 51 fixed to the outer peripheral surface of the holding member 39, and are integrally rotatable. Are linked to. The reamer mounting shaft 30
A key 35 is fixed to the outer peripheral surface of the central portion thereof, and is movable along the key groove 35a of the bite feed shaft 28 in the axial direction and integrally rotatable.

At the cylindrical base end of the bite feed shaft 28, there is provided a through hole 70 as a tool feed shaft engaging means, and an engaging member having a diameter larger than the diameter of the through hole 70 fitted into the through hole 70. A stop ball 72 is provided. Further, on the outer peripheral surface of the reamer mounting shaft 30, an engaging concave portion 74 with which the engaging ball 72 is engaged.
Is provided. Further, the engaging ball 72 fitted into the through hole 70 comes into contact with the edge of the key groove 49 on the inner peripheral surface of the main shaft 10 at a predetermined position during the axial movement of the reamer 62, so that the bite. A contact portion 76 having an obliquely inclined surface for pressing the locking ball 72 toward the engaging recess 74 by the movement of the feed shaft 28 is formed. Further, a locking corner portion 78 is formed on the inner peripheral surface of the central portion of the bite feed shaft 28, and an engaging head portion 79 of the reamer mounting shaft 30 is provided so as to be engageable in the backward direction.

As shown in FIG. 2, the base end of the reamer feed shaft 31 penetrates the inside of the support member 85 and is attached to one end of the connecting member 81 via a bearing 80. A connecting shaft 88 and a connecting member 89 are further fixed to the other end of the connecting member 81, and a nut member 82 is fixed to the tip of the connecting member 89. The nut member 82 is screwed with a screw shaft 83 provided in the same direction as the reamer feed shaft 31. The screw shaft 83 is attached to the support member 85 via the bearing 84, and the base end of the screw shaft 83 is fixed to the output shaft 87 of the motor 86 that is a drive device.

Next, the operation of the combined machining apparatus of this embodiment,
The operation will be described below. For example, when machining the valve seat of the cylinder head (not shown) and the stem guide 98, first, as shown in FIG. 3, the spindle motor is rotated from the retracted position of the cutting tool 56 and the reamer 62 to set the spindle 10 at a predetermined position. Then, the motor 86 is operated to move the reamer feed shaft 31 forward by the screw shaft 83 and the nut member 82. As a result, the reamer 62 is moved toward the tool holder 52 via the reamer mounting shaft 30. At this time, as shown in FIGS. 3 and 4, the engaging ball 72 engages with the engaging recess 74 of the reamer mounting shaft 30, and the bite feed shaft 28 moves as the reamer mounting shaft 30 moves.
Moves to the tip. As a result, the reamer mounting shaft 30
While rotating with the spindle 10, the bite feed shaft 28,
The cutting tool 56 is advanced through the holding member 39 and the slider 55. As for the advance of the cutting tool 56, the cam groove 58 of the holding member 39 advances as the tool feeding shaft 28 moves,
The cam member 57 gradually enters the cam groove 58, the slider 55 moves obliquely in the tip direction, and the cutting tool 56 moves in the axial direction and the radial direction. In addition, byte 56
The axial movement of the support member 12 is also adjusted by feeding the support member 12 by a slide device (not shown).

The bit 56 is located at the forward limit, and the bit 56
When the machining by is completed, the spindle motor is then moved to the reamer 6
The machining speed is increased to 2, and the reamer 62 is further advanced. At this time, as shown in FIG. 5, the tip of the bite feed shaft 28 is located at the end of the moving space in the tool holder 52, and the locking ball 72 of the bite feed shaft 28 is
Located below the zero key groove 49, the locking ball 72 moves into the key groove 49 by centrifugal force. Therefore, the bite feed shaft 28 does not move thereafter, and only the reamer mounting shaft 30 moves forward as the reamer feed shaft 31 moves forward. Then, as shown in FIG. 6, the reamer 62 is inserted into the stem guide 98,
Finishing of the inner peripheral surface is performed, and as shown in FIG. 7, the reamer 62 is positioned at the forward limit and the processing ends.

When performing the next machining, the reamer feed shaft 31 is retracted in the opposite direction to the above, so that the reamer 62 is retracted first, and the state shown in FIG. 5 is reached. The engaging head portion 79 of the reamer mounting shaft 30 comes into contact with the engaging corner portion 78 of the. At the same time, the locking ball 72
When the reamer feed shaft 31 hits the abutting portion 76 of the key groove 49, the locking ball 72 hitting the abutting portion 76 engages with the engaging recess 74, so that the bite feed shaft 28 and the reamer mounting shaft 30 come together. Retreat to.

According to the combined machining apparatus of this embodiment, the tool 56 and the reamer 62 can be moved only by the motor 86, and the tool feed shaft 28 and the reamer mounting shaft 30 can be reliably driven. It is a thing.

Next, a second embodiment of the combined machining apparatus of the present invention will be described with reference to FIGS. here,
The same members as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. The combined machining apparatus of this embodiment is also applied to an apparatus for machining a valve seat of a cylinder head of an engine, and the tool holder 52 can be automatically replaced together with the tool. Also in the combined machining apparatus of this embodiment, the cylindrical main shaft 10 is rotatably supported in the hollow support member 12 via the bearing 14 so as not to be relatively movable in the axial direction.

Inside the main shaft 10, concentrically, in order from the main shaft 10 side, a cylindrical clamping shaft 26, a cylindrical tool feeding shaft 28 which is a first tool feeding shaft, and a reamer mounting shaft which is a second tool mounting shaft. 30, reamer feed shaft 31 which is the second tool feed shaft
Has been inserted. The clamp shaft 26 is provided such that its tip is located at the tip of the main shaft 10 and the base end of the clamp shaft 26 projects from the base end of the main shaft 10. Then, a disc spring 34 is mounted between the nut 32 screwed to the base end portion of the clamp shaft 26 and the base end surface of the main shaft 10, and is adjusted to a predetermined tightening force by the nut 32, so that the clamp shaft 26 is secured. The main shaft 10 is biased toward the base end side thereof.

At the cylindrical base end of the bite feed shaft 28, there is provided a through hole 70 as a tool feed shaft engaging means, and a member having a diameter larger than the diameter of the through hole 70 fitted into the through hole 70. A stop ball 72 is provided. Further, an engagement recess 74 with which the locking ball 72 is engaged is provided on the outer peripheral surface of the central portion of the reamer mounting shaft 30, and the locking ball 72 is provided on the outer peripheral surface of the base end portion.
Is provided with a fitting recess 75 that fits in a retractable manner.
Further, the engaging ball 72 fitted into the through hole 70 comes into contact with the end edge corner of the groove 49 on the inner peripheral surface of the clamp shaft 26 at a predetermined position during the axial movement of the reamer 62.
A contact portion 76 having an obliquely inclined surface for pressing the locking ball 72 toward the engaging recess 74 by the movement of the bite feed shaft 28 is formed. Further, a locking corner portion 78 is formed on the inner peripheral surface of the center of the bite feed shaft 28, and the reamer mounting shaft 30
The engaging head 79 is provided so as to be engageable in the backward direction.

Further, the reamer mounting shaft 30 and the reamer feed shaft 3
1 is inserted into the bite feed shaft 28, and the base end portion and the tip end portion thereof are detachably connected to each other. As shown in the enlarged view of FIG. 10 and the like, in this connecting portion, a tubular portion 42 into which the tip portion of the reamer feed shaft 31 is fitted is formed at the base end portion of the reamer mounting shaft 30. A through hole 43 is formed, and an engaging ball 44 fitted in the through hole 43 and having a diameter larger than the thickness of the tubular portion 42 is engaged with the engaging ball 44 formed on the outer periphery of the tip portion of the reamer feed shaft 31. An annular engaging recess 45 is provided. Further, an annular fitting recess 46 into which the locking ball 44 is fitted is formed at a predetermined position on the inner peripheral surface of the bite feed shaft 28.

A tapered fitting portion 18 at the tip of the spindle 10.
A mounting portion 54 of a tool holder 52 which is coaxially and detachably provided is fitted to the main shaft 10, and the main shaft 10 and the tool holder 52 are integrally and rotatably connected by a key 19. On the outer peripheral surface of the tool holder 52, there is formed an annular groove 52a into which a tool gripping claw at an arm tip of an automatic tool changing device (not shown) is fitted at the time of automatic tool changing. Further, on the tool holder 52, a slider 55 movably attached in a radial direction at a predetermined angle with respect to the axial direction, a bite 56 as a first tool fixed to the slider 55, and a slider 55 A cam member 57 is provided so as to project toward the tip of the bite feed shaft 28. This cam member 57
Is a cam groove 58 formed at the tip of the bite feed shaft 28.
Is fitted to. Further, a through hole 60 is formed in the center of the tool holder 52, and a reamer that is a second tool fixed to the mounting portion 30 a of the reamer mounting shaft 30 is provided in the through hole 60 coaxially with the main shaft 10. 62 is inserted.

The tool holder 52 and the bite feed shaft 28 are
A key 51 fixed to the outer peripheral surface of the bite feed shaft 28 is axially movable along the key groove 51a of the tool holder 52 and integrally rotatably connected thereto. Further, the tool holder 52 and the clamp shaft 26 are coaxially fitted to the tip end of the clamp shaft 26, and the ball holding cylinder 5
3 and a clamp ball 59 fitted in the through hole 53a of the ball holding cylinder 53 and having a diameter larger than the thickness of the through hole 53a.
And an annular engaging recess 61 formed on the inner peripheral surface of the tool holder 52, with which the clamp ball 59 engages. Further, on the outer peripheral surface of the tip end portion of the clamp shaft 26, an annular fitting recess 6 into which the clamp ball 59 is fitted.
3 is formed, and the clamp ball 59 is fitted in the fitting recess 63 so that the tool holder 52 can be disconnected. Further, between the ball holding cylinder 53 and the clamp shaft 26, a biasing member 65 such as a coil spring that biases the ball holding cylinder 53 toward the base end portion of the clamp shaft 26 is attached.

A key 35 is fixed to the outer peripheral surface of the central portion of the reamer mounting shaft 30, and the key groove 35a of the bite feed shaft 28 is provided.
Is provided so as to be axially movable along with and integrally rotatable. Further, the reamer mounting shaft 30 and the reamer feed shaft 31 are connected in the axial direction.

Further, the nut 32 at the base end of the clamp shaft 26
As shown in FIG. 9, the nut 32 of the clamp shaft 26 is
A pressing member 64 that pushes in the axial direction to slide the clamp shaft 26 abuts, and the pressing member 64 is provided such that a hydraulic cylinder 66, which is a clamp operating device, can press the tip portion in the axial direction. A detection piece 95 is fixed to the pressing member 64, and first and second detections for detecting the clamped state and the unclamped state of the tool holder 52 on the side of the detection piece 95 along the moving direction thereof. Proximity sensors 96 and 97, which are means, are provided. Also, the reamer feed shaft 31
As shown in FIG. 9, a motor 86 and the like are provided at the base end portion of the same as the first embodiment.

Next, the operation of the combined machining apparatus of this embodiment,
The operation will be described below. For example, when the valve seat of the cylinder head and the stem guide 98 (not shown) are processed, the same operation as in the first embodiment is performed. First, as shown in FIG. The reamer feed shaft 31 is moved forward from the position. As a result, the reamer 62 is attached via the reamer mounting shaft 30.
Is moved toward the tool holder 52. At this time, FIG.
As shown in, the engaging ball 72 is engaged with the engaging recess 74 of the reamer mounting shaft 30, and the bite feed shaft 28 moves to the tip end portion as the reamer mounting shaft 30 moves. As a result, the reamer mounting shaft 30 advances the cutting tool 56 via the cutting tool feed shaft 28 and the slider 55 while rotating with the main shaft 10.

The byte 56 is located at the forward limit, and the byte 56
When the machining by is completed, the spindle motor is then moved to the reamer 6
The machining speed is increased to 2, and the reamer 62 is further advanced. At this time, as shown in FIG.
Is positioned at the end of the moving space in the tool holder 52, and the locking ball 72 of the bite feed shaft 28 is positioned below the groove 49 of the clamp shaft 26.
Moves into the groove 49 due to centrifugal force. Therefore, the bite feed shaft 28 does not move thereafter, and only the reamer mounting shaft 30 moves forward as the reamer feed shaft 31 moves forward. And FIG.
As shown in, the reamer 62 is inserted into the stem guide 98 to finish the inner peripheral surface, and the reamer 62 is positioned at the forward limit, and the processing is completed.

When performing the next machining, the reamer feed shaft 31 is retracted in the opposite direction to the above, so that the reamer 62 is first retracted and the state shown in FIG. 11 is reached.
The reamer mounting shaft 30 is attached to the locking corner portion 78 of the bite feed shaft 28.
The engaging head 79 of the above contacts. At the same time, the locking ball 72
Hits the contact portion 76 of the groove portion 49, and the reamer feed shaft 31
Of the locking ball 72 hitting the abutting portion 76 due to the backward movement of the
Engages in the engaging recess 74, and the bite feed shaft 28 and the reamer mounting shaft 30 retract together.

Next, when the tool holder 52 is removed and the cutting tool 56 or the reamer 62 is replaced by an unillustrated automatic tool changing device, or when the tool holder 52 is replaced and the cutting tool 56 and the cutting tool 56 mounted on another tool holder are replaced. A case where processing is performed by the reamer 62 will be described. First, from the state shown in FIG. 12, the motor 86 is further rotated to move the reamer feed shaft 31 forward, and as shown in FIG.
The position of the locking ball 44 of 0 is aligned with the fitting recess 46 of the bite feed shaft 28, and the reamer mounting shaft 30 is moved to a removable position. Further, the fitting concave portion 75 is located inside the locking ball 72, and the clamp shaft 26 is the bite feed shaft 28.
It becomes possible to move in the direction of the tip.

Thereafter, as shown in FIG. 14, the hydraulic cylinder 66 is operated, the pressing member 64 pushes the nut 32 of the clamp shaft 26 in the distal direction, and the fitting recess 63 at the distal end of the clamp shaft 26 causes the clamp ball to move. Located inside 59,
The clamp ball 59 can be retracted, and the tool holder 5
2 is removable from the clamp shaft 26. At this time, the ball holding cylinder 53 is urged by the urging member 65 toward the base end portion side of the clamp shaft 26, so that the clamp ball 59 easily falls into the fitting recess 63. The moving range of the ball holding cylinder 53 is limited to a predetermined range by a pin, a long hole and the like (not shown).

Next, when mounting the tool holder 52,
The mounting portion 54 of the tool holder 52 is inserted into the fitting portion 18 of the spindle 10, and the hydraulic cylinder 6 is moved from the unclamped state.
6. The motor 86 operates in reverse and performs the reverse operation to the above,
The tool holder 52 is securely clamped to the spindle 10.

According to the combined machining apparatus of this embodiment, in addition to the same effect as that of the first embodiment, when the tool holder 52 is automatically replaced, the connecting portion of the tool feed shaft has the reamer mounting shaft 30.
And the reamer feed shaft 31 need only be connected, and the tool holder 52
The structure is simple, and the connection structure can be made reliable and strong.

Next, a third embodiment of the combined machining apparatus of the present invention will be described with reference to FIGS. Here, the same members as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted.

The combined machining apparatus of this embodiment is also applied to an apparatus for machining the valve seat of the cylinder head of the engine, and the through hole 70 as the tool feed shaft engaging means of the second embodiment and the locking. Instead of the ball 72, a locking piece 92 having a locking projection 90 is provided. Locking piece 9
2 can freely swing around the shaft 94, and the locking projection 90
Is to engage with an engaging recess 74 formed on the outer periphery of the reamer mounting shaft 30, similar to the engaging ball 72 of the second embodiment.

Next, the operation of the combined machining apparatus of this embodiment,
The operation will be described below. In this embodiment, the same operation as that of the second embodiment is performed. First, as shown in FIG. 15, the reamer feed shaft 31 is moved forward from the position where the cutting tool 56 and the reamer 62 are at the backward limit. As a result, the reamer 62 is moved toward the tool holder 52 via the reamer mounting shaft 30. At this time, as shown in FIG. 15, the engaging projection 90 of the engaging piece 92 is fitted into the engaging recess 74 of the reamer mounting shaft 30.
Engage with each other, and the bite feed shaft 28 moves to the distal end portion with the movement of the reamer mounting shaft 30.

When the cutting tool 56 is positioned at the forward limit, the spindle motor is moved up to the machining speed of the reamer 62, and the reamer 62 is further advanced. At this time, as shown in FIG. 16, the tip of the bite feed shaft 28 is located at the end of the moving space in the tool holder 52, and the locking piece 9 of the bite feed shaft 28 is located.
2 is located below the groove portion 49 of the clamp shaft 26, and the locking piece 92 swings into the groove portion 49 due to centrifugal force. Therefore,
After that, the bite feed shaft 28 does not move, and only the reamer mounting shaft 30 moves forward as the reamer feed shaft 31 moves forward. And
As shown in FIG. 17, the reamer 62 includes a stem guide 98.
, The inner peripheral surface is finished, and the reamer 62 is positioned at the forward limit to finish the machining.

Further, when performing the next machining, the reamer feed shaft 31 is retracted in the opposite manner to the above, so that the reamer 62 is retracted first and the state shown in FIG. 16 is reached.
The reamer mounting shaft 30 is attached to the locking corner portion 78 of the bite feed shaft 28.
The engaging head 79 of the above contacts. At the same time, the locking piece 92 hits the abutting portion 76 of the groove 49, and when the reamer feed shaft 31 retracts, the locking piece 92 abutting the abutting portion 76 swings to the engaging concave portion 74, and the locking convex portion. 90 engages with the engaging recess 74, and the bite feed shaft 28 and the reamer mounting shaft 30 retract together.

Next, when the tool holder 52 is removed and the cutting tool 56 or the reamer 62 is replaced by an unillustrated automatic tool changing device, or when the tool holder 52 is replaced and the cutting tool 56 mounted on another tool holder A case where processing is performed by the reamer 62 will be described. First, from the state shown in FIG. 17, the reamer feed motor is further rotated to move the reamer feed shaft 31 forward, and as shown in FIG. 18, the position of the locking ball 44 of the reamer mounting shaft 30 is changed by the bite feed. The reamer mounting shaft 30 is moved to a removable position in alignment with the fitting recess 46 of the shaft 28. At the same time, the locking piece 9
The second locking portion 90 faces the fitting recess 75. Thereafter, similarly to the second embodiment, the fitting recess 63 at the tip of the clamp shaft 26 is located inside the clamp ball 59, the clamp ball 59 can be retracted, and the tool holder 52 is removed from the clamp shaft 26. It is removable. Also,
The tool holder 52 is mounted in the same manner as in the second embodiment.

The combined machining apparatus of the present invention is used for machining a valve seat of a cylinder head of an engine, and a plurality of other tools are arranged around a rotary shaft of a spindle.
Any tool holder capable of automatically exchanging a tool holder holding a plurality of tools may be used, and the usage and number and type of tools are not limited.

[0042]

According to the combined machining apparatus of the present invention, the number of driving apparatuses used for machining can be minimized, the apparatus can be downsized, and the drive control can be facilitated. Further, also in the automatic tool change, the connecting portion of the tool holder can be simplified, the strength and precision are high, the durability is high, and the clamp and unclamp operations can be made reliable and easy.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main spindle portion of a combined machining device according to a first embodiment of the present invention in a state where a cutting tool and a reamer are positioned at a forward limit.

FIG. 2 is a vertical sectional view showing a cutting tool and a reamer feeding motor of the combined machining apparatus according to the first embodiment.

FIG. 3 is a vertical cross-sectional view of a tool holder portion in a state where a cutting tool and a reamer of the combined machining apparatus according to the first embodiment are located at a backward limit.

FIG. 4 is a vertical cross-sectional view of a tool holder portion during movement of a cutting tool and a reamer of the combined machining apparatus according to the first embodiment.

FIG. 5 is a vertical cross-sectional view of the tool holder portion in a state where the cutting tool of the combined machining apparatus according to the first embodiment is in the forward limit and the reamer is moving.

FIG. 6 is a vertical cross-sectional view of a tool holder portion in a state where the cutting tool of the combined machining apparatus according to the first embodiment is in the forward limit and the reamer is further moving.

FIG. 7 is a vertical cross-sectional view of a tool holder portion in a state where a cutting tool and a reamer of the combined machining apparatus according to the first embodiment are located at a forward limit.

FIG. 8 is a vertical cross-sectional view of the main spindle portion of the combined machining apparatus according to the second embodiment of the present invention in a state where the cutting tool and reamer are positioned at the forward limit.

FIG. 9 is a vertical cross-sectional view showing a cutting tool and a reamer feeding motor of the combined machining apparatus of the second embodiment.

FIG. 10 is a vertical cross-sectional view of a tool holder portion in a state in which a cutting tool and a reamer of the combined machining apparatus according to the second embodiment are located at a backward limit.

FIG. 11 is a vertical cross-sectional view of a tool holder portion in a state where the cutting tool of the combined machining apparatus of the second embodiment is in the forward limit and the reamer is moving.

FIG. 12 is a vertical cross-sectional view of a tool holder portion in a state in which a cutting tool and a reamer of the combined machining apparatus of the second embodiment are located at the forward limit.

FIG. 13 is a vertical cross-sectional view of a tool holder portion when a tool is replaced in the combined machining apparatus according to the second embodiment.

FIG. 14 is a vertical cross-sectional view of a tool holder portion in a tool replaceable state of the combined machining apparatus of the second embodiment.

FIG. 15 is a vertical cross-sectional view of a tool holder portion in a state where a cutting tool and a reamer are located at a backward limit of a combined machining apparatus according to a third embodiment of the present invention.

FIG. 16 is a vertical cross-sectional view of a tool holder portion in a state where the cutting tool of the combined machining apparatus according to the third embodiment is at the forward limit and the reamer is moving.

FIG. 17 is a vertical cross-sectional view of a tool holder portion in a state in which a cutting tool and a reamer of the combined machining apparatus of the third embodiment are positioned at the forward limit.

FIG. 18 is a vertical cross-sectional view of a tool holder portion in a tool exchangeable state of the combined machining apparatus of the third embodiment.

[Explanation of symbols]

 10 Spindle 26 Clamp Shaft 28 Bit Feed Axis (First Tool Feed Axis) 30 Reamer Attachment Axis (Second Tool Attachment Axis) 31 Reamer Feed Axis (Second Tool Feed Axis) 43 Through Hole (Connecting Means) 44 Locking Ball ( Connection means) 45 Engagement recess (connection means) 46, 63, 75 Fitting recess 52 Tool holder 53 Ball holding cylinder (holder connection means) 53a Through hole (holder connection means) 56 bytes (first tool) 59 Clamp ball ( Holder connecting means) 61 Engagement concave portion (holder connecting means) 62 Reamer (second tool) 64 Pressing member 65 Biasing member 66 Hydraulic cylinder (clamp operating device) 70 Through hole (tool feed shaft engaging means) 72 Locking ball (Tool feed shaft engaging means) 74 Engagement recess (tool feed shaft engaging means) 76 Abutting portion 86 Motor (driving device) 92 Locking piece (locking means) 96, 97 Proximity Capacitors (detection means)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B23P 23/02 A 7528-3C // B23B 3/26 9136-3C

Claims (9)

[Claims] 1. A main shaft driven at a predetermined number of revolutions, a tool holder coaxially removably provided on the main shaft, a first tool and a first tool movably attached to the tool holder in an axial direction. Two tools, a first tool feed shaft attached to the tool holder side to move the first tool in the axial direction of the spindle, and a second tool attached to the tool holder side to move the second tool in the axial direction of the spindle. A second tool mounting axis to
A second tool feed shaft that is coupled to the second tool mounting shaft base end portion and moves the second tool mounting shaft in the axial direction of the main shaft,
Tool feed shaft engaging means for interlocking the first tool feed shaft and the second tool attachment shaft or the second tool feed shaft at a predetermined position during the axial movement of the second tool, and the second tool feed shaft A combined machining device provided with a drive device for moving the shaft in the axial direction. 2. The tool feed shaft engaging means includes a through hole formed in the first tool feed shaft, a locking ball provided in the through hole, and an outer peripheral surface of the second tool mounting shaft. The multi-tasking machine according to claim 1, characterized by comprising an engagement recess formed therein. 3. The locking ball fitted into a through hole formed in the first tool feed shaft is provided at a predetermined position of the tool feed shaft engaging means during the axial movement of the second tool. 3. The multi-tasking machine according to claim 2, wherein an abutting portion that abuts and presses the locking ball toward the engaging recess by the movement of the second tool feed shaft is formed. 4. A main shaft driven at a predetermined rotational speed, a tool holder coaxially removably provided on the main shaft, a first tool and a first tool movably attached to the tool holder in an axial direction. Two tools, a first tool feed shaft attached to the tool holder side to move the first tool in the axial direction of the spindle, and a second tool attached to the tool holder side to move the second tool in the axial direction of the spindle. A second tool mounting axis to
A second tool feed shaft that is coupled to the second tool mounting shaft base end portion and moves the second tool mounting shaft in the axial direction of the main shaft,
A connecting means for connecting the base end portion of the second tool attachment shaft and the tip end portion of the second tool feed shaft, and the tool holder is detachably attached to the tip end portion and is coaxial with the spindle and slidable in the axial direction. A clamp shaft that is integrally rotatable and that connects the clamp shaft with the tool holder; the first tool feed shaft and the second tool attachment shaft or the second tool feed shaft. Tool feed shaft engaging means for interlocking at a predetermined position during the axial movement of the second tool, a drive device for axially moving the second tool feed shaft, and a clamp operation for axially moving the clamp shaft. A multi-purpose processing device, characterized by being provided with a device. 5. The tool feed shaft engaging means includes a through hole formed in the first tool feed shaft, a locking ball provided in the through hole, and an outer peripheral surface of the second tool mounting shaft. A driving device, which is formed of an engaging recess and moves the second tool feed shaft in the axial direction, engages the engaging ball with the engaging recess and operates the connecting means. The combined processing device according to claim 4, wherein 6. The locking ball fitted into a through hole formed in the first tool feed shaft is provided at a predetermined position of the tool feed shaft engaging means during the axial movement of the second tool. 6. The multi-tasking machine according to claim 5, wherein an abutting portion that abuts and presses the locking ball toward the engaging recess by the movement of the second tool feed shaft is formed. 7. The tool feed shaft engaging means comprises a locking piece swingably provided on the first tool feed shaft and an engagement recess formed on an outer peripheral surface of the second tool mounting shaft. The combined processing device according to claim 4, wherein the combined processing device is formed. 8. A locking piece, which is swingably provided on the first tool feed shaft, abuts on a predetermined position of the tool feed shaft engaging means during the axial movement of the second tool. An abutment portion that presses the locking piece in the engagement recess direction is formed by movement of the second tool feed shaft, and the locking piece is engaged by axial movement of the second tool by the drive device. The combined machining apparatus according to claim 7, wherein the driving means actuates the connecting means while engaging with the recess. 9. The holder connecting means is a ball holding cylinder coaxially fitted to the tip end portion of the clamp shaft and having a predetermined through hole, and a ball holding cylinder fitted into the through hole of the ball holding cylinder. A clamp ball provided inside, an engagement recess formed on the inner peripheral surface of the tool holder with which the clamp ball engages,
A fitting recess formed on the outer peripheral surface of the tip end of the clamp shaft into which the clamp ball fits, and a biasing member that biases the ball holding cylinder toward the base end of the clamp shaft. The combined machining apparatus according to claim 4, wherein