JP2007260887A - Composite working tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite working tool constituting the composite working tool so as to be replaceable with an automatic tool without becoming expensive more than a conventional tool, and developed for both an exclusive machine tool and a machining center for further enhancing working accuracy by individually controlling a valve seat and a valve guide. <P>SOLUTION: The composite working tool 100 is a tool body 31 joined to a main spindle by a separation means CO by inserting a tool connecting part 31A into a main spindle holding part (a tapered hole) 30A on the tip of the main spindle 30 of the machine tool (the machining center), and has a chuck means C for installing a reamer 40 on the tip of an inner peripheral cylinder 37 inserted into an intermediate cylinder 35, connecting a cutting edge (a cutting tool) B to the tip side of the intermediate cylinder 35, rotatably and axially movably arranging the intermediate cylinder and the inner peripheral cylinder in an outer peripheral cylinder around the axis L, and for installing the reamer 40. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to, for example, a composite processing tool that simultaneously cuts a valve seat (taper seat surface) and a valve guide (guide hole) in a cylinder head of an engine. The present invention relates to a combined machining tool for both a machining center and a dedicated machine tool.

  Conventionally, there has been provided a valve seat cutting tool that simultaneously cuts a valve seat and a valve guide in a cylinder head. A typical example is that high-precision machining can be performed by suppressing wear of the slider holding the cutting tool and the slide groove into which the slider is fitted. More specifically, a slide groove extending along the axis and having a bottom surface inclined with respect to the axis is provided on the front surface of the tool body rotated about its own axis, and the slide groove is provided in the slide groove. Is a valve seat tool that houses a slider having a cutting tool for cutting the valve seat, and the tool body is provided with a driving body for reciprocating the slider along the bottom surface of the slide groove. The valve seat tool has a concave inner surface at the tip of a conical main shaft to be attached to a main shaft support portion of a machine tool, and a rotating member fitted into the concave portion and a convex portion of the main shaft support portion. It is connected. In particular, a rolling pair means comprising a plate connecting a plurality of rotating bodies is provided between the slider and the inner surface of the slide groove (see, for example, Patent Document 1).

  According to the above valve seat tool, since the rolling pair means comprising a plate in which a plurality of rotating bodies are connected is provided between the slider and the inner surface of the slide groove, the movement resistance of the slider can be reduced and wear can be suppressed. There is an advantage that precision machining is possible. However, in the valve seat tool, the reamer and the bite are interlocked by the advance and retreat movement of the support member, and the reamer advances and retreats along the axis line to drill the guide bush, and the bite moves along the inclined slide groove. This is a one-axis control in which the valve seat “tapered seating surface” is advanced by moving back and forth, so the reamer will run idle when the valve seat is machined with a cutting tool, and the accuracy of drilling will be reduced. There is. Further, the valve seat tool does not have an automatic exchange function with the spindle of the machine tool.

  Another combined machining tool includes a tool main body, a valve guide hole machining reamer, a flank machining cutter fixed to the tool main body, and a tool main body movable between first and second extreme positions. And a contact surface processing cutter held on the surface. The cutting edge of the flank cutting cutter extends at the same angle as the contact surface with respect to the central axis of the valve guide hole. When the contact surface machining cutter is in the first extreme position or the second extreme position, only one of the flank machining cutter and the contact surface machining cutter contacts the valve seat, and the other contacts the valve seat. Do not touch. Further, in the composite machining tool, the taper portion of the housing is connected to the main shaft taper hole of the machining center, and the pressure fluid supplied from the main shaft side is guided to the first cylinder chamber and its piston, the second cylinder chamber and the piston, A flank cutter and a contact surface cutter are provided that move forward and backward in the axial direction (see, for example, Patent Document 2).

  In the composite machining tool, the flank cutting cutter and the contact surface machining cutter are separately driven two-axis control, so that cutting is not started at the same time, and chattering does not easily occur. The problem does not occur. However, since the flank face cutter and the contact face face cutter are controlled by the flow rate of the pressure fluid to each cylinder chamber, it is difficult to perform precise cutting feed control.

  Furthermore, another cutting tool has an attachment portion formed on the rear end side of the tool body attached to the tool holding portion of the machine tool, and the tool body is rotated toward the axial direction while being rotated around the axis. The reamer mounted in the mounting hole of the tool body processes, for example, a pilot hole made of a valve hole in the cylinder head of the engine into a predetermined inner diameter, and a cutting blade provided on the outer periphery of the tool body has an opening of the valve hole. The valve seat surface with which the valve head comes into contact with the portion is processed. However, in this case, since the replacement of the cutting tool with the main shaft must be performed manually, automatic operation cannot be performed by automatic replacement of the cutting tool as in a normal machining center (see, for example, Patent Document 3).

  JP 2000-61722 A   JP 2005-125416 A   JP-A-6-30480

  The present invention has been made in view of the problems of the conventional valve seat tool, composite machining tool, and cutting tool. The purpose of the machining center is a machining center and a dedicated machine that can be combined with a machine tool that can be automatically replaced and that can control the valve seat (tapered seating surface) and valve guide (guide hole) individually to further improve machining accuracy. It provides composite machining tools developed for both machines.

In order to achieve the above object, the composite machining tool according to claim 1 of the present invention is such that the tool main body rotating around the axis has an intermediate cylinder fitted into the outer cylinder and an inner cylinder fitted into the middle cylinder coaxial with the axis. In addition, the inner peripheral cylinder is provided with a cutting edge for a seating surface, and an inner peripheral cylinder is provided with a hole cutting edge at the rear end side of the machine tool. A combined machining tool provided with a tool connecting portion engaged with and disengaged from a spindle holding portion, wherein the tool connecting portion is formed in an uneven shape at the rear end of each of the outer peripheral tube, the intermediate tube and the inner peripheral tube. A spindle having a plurality of tool side engaging portions, and a main shaft formed in a concavo-convex shape at the tip of the driving outer cylinder, the driving middle cylinder, and the driving inner cylinder on the tool connecting side of the main spindle holding section that engages and disengages with the tool connecting section The tool body is provided with a side engagement portion, and the peripheral rotation of the outer peripheral cylinder, the intermediate cylinder, and the inner peripheral cylinder with respect to the spindle holding portion is performed in the circumferential direction. A rotation transmitting means for restricting the rotational force and transmitting the rotational force, a movement amount limit X of the intermediate cylinder, a movement amount limit Y of the inner peripheral cylinder, and a guide portion at the time of attaching / detaching the tool, When the engagement is disengaged by causing a predetermined rotational angle phase difference with the main shaft side engaging portion, the tool connecting portion can be engaged with and disengaged from the tool connecting side, and the tool connecting portion and the tool connecting side The tool main body is connected to the spindle holding part of the machine tool by engaging the tool side engaging part and the spindle side engaging part with relative rotation of the tool.

  A composite machining tool according to claim 2 is the composite machining tool according to claim 1, wherein the machine tool is a machining center or a dedicated machine tool.

That is, according to the combined machining tool of the present invention, the combined machining tool that is inserted and connected to the spindle holding portion at the spindle tip of the machining center or the dedicated machine tool is the tool of the combined machining tool at the time of this automatic tool change operation. The connecting portion includes a plurality of tool side engaging portions formed in an uneven shape at the rear end of each of the outer peripheral tube, the intermediate tube, and the inner peripheral tube, and the spindle holding member that engages and disengages with the tool connecting portion. The tool connecting side of the part includes a spindle side engaging portion formed in an uneven shape at the tip of the driving outer cylinder, the driving middle cylinder, and the driving inner cylinder, and the tool side engaging part and the spindle side engaging part When the engagement is disengaged by generating a predetermined rotation angle phase difference, the tool connecting portion can be engaged with and disengaged from the tool connecting side. Thus, the tool connecting portion can be inserted into the tool connecting side, and the tool connecting portion is rotated relative to the tool connecting side to engage the tool side engaging portion and the spindle side engaging portion. Match. Thereafter, the tool connection side is pulled and clamped to the back side of the spindle. Further, when removing the combined machining tool from the spindle holding portion of the spindle, the tool connecting side is pulled out to the spindle side and unclamped. Thereafter, the tool connecting portion is rotated relative to the tool connecting side to disengage the tool side engaging portion and the main shaft side engaging portion, thereby releasing the combined machining tool. It is pulled out from the main shaft holding part of the main shaft. With the above tool changing operation, the combined machining tool is automatically changed with respect to the spindle holding portion of the spindle.
As a result, the combined machining tool can be automatically attached / detached with the spindle holding part of the machining center “automatic tool change”, and the valve seat (tapered seat surface) and valve guide (guide hole) pre-formed on the cylinder head can be individually set. Even when the machining of various dimensions for high-precision finish cutting is automatic operation or manual or automatic in a dedicated machine tool, it can be instantly attached and detached, and the machining efficiency is enhanced.

  Further, the tool body is provided with a rotation transmission means for restricting the relative rotation angles in the circumferential direction of the outer peripheral cylinder, the intermediate cylinder and the inner peripheral cylinder with respect to the main spindle holding portion and transmitting the rotational force of the main spindle. Engagement / disengagement between the tool connecting portion of the machining tool and the spindle holding portion of the spindle can be accurately performed, and the rotational force of the spindle is transmitted to the outer cylinder, the intermediate cylinder, and the inner cylinder, so that cutting is reliably performed. Moreover, since the movement limit X of the intermediate cylinder and the movement limit Y of the inner cylinder are restricted when the tool is engaged and disengaged, the tool axis and the spindle axis may come into contact with each other, for example, with aging. Even if it exists, the intermediate | middle cylinder and inner periphery cylinder with respect to an outer periphery cylinder do not move more than the distance of X or Y to an axial direction. In addition, in order to ensure that the tool can be connected when the tool is mounted, a guide slope is provided in the circumferential direction between the tool connecting part and the tool connecting side to guide the engagement and disengagement of the tool connecting part. The axial clearance between the intermediate cylinder and the inner cylinder can be made minute. As a result, there is provided a composite machining tool that can be used for both a machining center and a dedicated machine tool that require machining accuracy.

According to the combined machining tool for a machining center of the present invention, various tool sizes of the combined machining tool can be freely and automatically operated as in a normal machining center. In addition, the rotation transmitting means, the movement amount restricting means, and the guide portion increase the engagement / disengagement accuracy at the time of tool replacement, and there is no backlash in the axial direction, and each tool can be positioned with high accuracy under two-axis control. As a result, the finish cutting of the valve seat and valve guide formed in advance on the cylinder head can be processed individually with high accuracy, and the valve seat and valve guide of various dimensions can be operated automatically or freely, thereby improving the processing efficiency. .
That is, (1) Cutting of valve seats and valve guides of various dimensions, which are a plurality of types of workpieces, can be performed individually. (2) According to this tool, the manufacturing cost is low because the configuration is rational compared to the conventional tool, and even if the frequency of mounting to the spindle is high because it is an automatic tool change by the standard tool shank method. Mounting accuracy does not decrease. (3) Previously, automatic tool change was impossible, but automatic tool change was possible, and the reaming tool and valve seat processing tool for the valve seat and valve guide were separated and controlled with high precision by separate 2-axis control. it can.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a combined machining tool for a machining center, FIGS. 2 to 6 are partial cross-sectional views, and FIG. 7 is a cross-sectional view of a combined working tool.

  The composite machining tool 100 that can be used for both the machining center and the dedicated machine tool of the present invention is configured as follows. First, as shown in FIG. 1, in a tool main body 31 in which a tool connecting portion 31A is inserted into a main shaft holding portion (tapered hole) 30A at the tip of a main shaft 30 of a machine tool (machining center) and coupled to the main shaft by a detaching means CO. The front body 15 rotated about the axis L of the outer peripheral cylinder 31B having the tool connecting portion 31A is provided with a slide groove 33 extending along the axis and having a bottom surface inclined with respect to the axis. A slider S having a cutting tool B for cutting the valve seat VS is accommodated in the slide groove, and an intermediate cylinder 35 for driving the slider S is provided in the outer peripheral cylinder 31B so as to be able to turn and move in the axial direction. A reamer guide cylinder 41 is attached to the tip of an inner peripheral cylinder 37 that is inserted into the intermediate cylinder 35 so as to be able to turn and move in the axial direction. That is, a reamer “hole cutting blade” 40 is attached to the tip of the inner peripheral cylinder 37, and the cutting blade (cutting tool, cutting blade for seating surface) B is connected to the tip end side of the intermediate cylinder 35, In the combined machining tool 100, the intermediate cylinder and the inner cylinder in the cylinder are arranged around the axis L so as to be rotatable and movable in the axis direction, and are provided with chuck means C for attaching the reamer 40. In addition, as will be described later, the rotation transmission means 80, the movement limit X of the intermediate cylinder, the movement limit Y of the inner cylinder, and the guide for attaching and detaching the tool are described in the rear and front of the peripheral cylinders 31B, 35, 37. A portion 47 is provided.

  Next, the detailed configuration of the combined machining tool 100 will be described. First, the composite machining tool has a tool body 31 that rotates about an axis L, and a reamer 40 that extends along the axis L is attached to the tip of the tool body 31, and a cutting edge ( Byte) B is arranged. On the rear end side of the tool body 31, there is a tool connecting portion 31A that is engaged and disengaged with a spindle holding portion 30A of a machining center or a dedicated machine tool. In the tool body, an outer peripheral cylinder 31B, an intermediate cylinder 35 fitted in the cylinder, and an inner cylinder 37 fitted in the intermediate cylinder rotate coaxially with the axis L and move in the axial direction. Arranged to be possible.

  The tool connecting portion 31A includes a plurality of (four in the drawing, may be the following, may be the following) tool connecting portions 31K and 35K formed at the rear ends of the outer peripheral cylinder 31, the intermediate cylinder 35, and the inner peripheral cylinder 37, respectively. , 37K. The tool connecting portions 31K, 35K, and 37K are tool-side engaging portions formed in an uneven shape. A plurality (four in the figure, more or less in the figure) can be engaged and disengaged by inserting the tool connecting portion into the spindle holding portion 30A corresponding to the plurality of tool connecting portions 31K, 35K, and 37K. The tool connecting sides 50A, 51A, 52A, that is, the main shaft side engaging portions formed in an uneven shape are provided at the distal ends of the driving outer cylinder 50, the driving middle cylinder 51, and the driving inner cylinder 52 arranged coaxially. In the tool connecting portions 31K, 35K, and 37K, notch portions KO that are recessed radially outward and locking claw portions K1 that protrude radially inward are alternately arranged in the circumferential direction, and the tool connecting side 50A , 51A, 52A are alternately arranged in the circumferential direction with protrusions K2 protruding outward in the radial direction and relief parts K3 recessed inward in the radial direction. Then, when the circumferential positions of the protrusion K2 and the cutout KO coincide, the tool connecting portions 31K, 35K, and 37K can be inserted into and discharged from the tool connecting sides 50A, 51A, and 52A. That is, the tool connecting portion and the tool connecting side are rotated by a predetermined angle of the main shaft through the rotation amount restricting means 80 to engage the protruding portion K2 and the locking claw portion K1, and thereby the tool body 31. Is coupled to the spindle holding portion 30A of the machining center.

  The locking claw K1 protruding in the inner diameter direction of the tool connecting portion, the protrusion K2 protruding in the outer diameter direction in the main shaft side engaging portion, and the outer diameter in the tool side engaging portion. The notch part KO recessed in the direction and the escape part K3 recessed in the inner diameter direction in the main shaft side engaging part are reversed between the tool side engaging part and the main shaft side engaging part. It is good also as a compositional relationship.

  Next, a description will be given of the rotation transmitting means 80 provided at the rear part and the front part of the peripheral cylinders 31B, 35, 37 and the guide part 47 for guiding the tool axis with respect to the main shaft. First, the rotation transmission means 80 regulates the rotation amounts of the outer peripheral cylinder 31B, the intermediate cylinder 35, and the inner peripheral cylinder 37 with respect to the main shaft 30 to 45 degrees, for example. That is, the circumferential positions of the grooves of the protruding portion K2 and the notch KO are matched, and the protruding portion K2 is restricted to a position where the locking claw portion K1 is engaged, as shown in FIG. And stop pins P1, P2 and swivel allowance grooves M1, M2. The stop pins P1 and P2 are attached to the front surface of the main shaft 30, and the turning allowance grooves M1 and M2 are provided in the outer cylinder 31. Therefore, the relative rotational amounts of the outer peripheral cylinder 31B, the intermediate cylinder 35, and the inner peripheral cylinder 37 with respect to the main shaft 30 are restricted to the rotation angle β. Thus, when the tool is changed, the main shaft is rotated / reversed by 45 ° to control the engagement / disengagement between the main shaft and the tool body, and the rotational torque is transmitted to the composite machining tool 100 when the main shaft is rotated. Note that the rotation angle in the rotation transmitting means 80 is controlled by the second orientation function “AC spindle” of orientation.

  The guide portion 47 guides the tool connecting portions 31K, 35K, and 37K of the tool body 31 so as not to be caught when engaged with the tool holding portions 50A, 51A, and 52A of the spindle. As shown in FIG. 5, slopes a and b are provided at the joints where the tool connecting portions 31K, 35K, and 37K and the tool holding portions 50A, 51A, and 52A are engaged, and the engagement between the two is smooth and easy. It is something that can be done. The distance between the movement amount limit X of the intermediate cylinder and the movement amount limit Y of the inner peripheral cylinder is the distance between the slopes a and b provided at the joint where the tool connecting portions 31K, 35K and 37K engage with the tool holding portions 50A, 51A and 52A. It is a numerical value that does not exceed the height, and the slope needs to work as a guide surface. Now, by processing the axial length of the tool body and the axial length of the main shaft with high accuracy, the axial clearance between the two is regulated to a minute (about 0.01 mm), so that it is intermediate to the outer cylinder 31B. The follow-up accuracy of the tool connecting portion with respect to the amount of axial movement between the cylinder 35 and the inner cylinder 37 is increased, and the cutting feed rate of the cutting edge can be uniformly controlled with high accuracy.

  Further, the tool body 31 has a movement amount restriction for restricting a relative movement amount in the axial direction L between the intermediate cylinder and the inner cylinder with respect to the outer cylinder, and a movement amount restriction X for the intermediate cylinder and a movement amount restriction for the inner cylinder. In order to secure the distance of Y, it is provided at the tip of each cylinder 31B, 35, 37. As shown in FIG. 1, a certain distance is set between the tip member 35 </ b> E of the intermediate cylinder 35 and the tip member 37 </ b> E of the inner peripheral cylinder 37. By each of the above-described constituent means, the biaxial control in the axial direction of the reamer “cutting blade for drilling” 40 and the cutting blade (cutting tool, seating surface processing cutting blade) B is performed by the driving cylinder 51 in the main shaft 30 and the driving. By precisely controlling the position movement of the inner cylinder 52 in the front-rear direction of the axis L1, the intermediate cylinder 35, the inner peripheral cylinder 37, and the cutting blades 40, B at their tips are controlled separately. Thereby, the processing accuracy for the valve seat and the valve guide can be obtained.

  The composite machining tool 100 of the present invention is configured as described above, and operates and is used as follows. First, in the machining center, the combined machining tool 100 inserted and connected to the spindle holding part 30A at the tip of the spindle 30 is connected to the tool connecting part 31A {31K, 35K, 37K of the combined machining tool at the time of this automatic tool change operation. }, The notch KO recessed radially outward and the locking claw K1 protruding radially inward are alternately arranged in the circumferential direction, and the tool connection side of the spindle holding part of the spindle 30 In 50A, 51A, and 52A, since the protrusion part K2 protruded toward the radial direction outer side and the relief part K3 recessed toward the radial direction inner side are alternately arranged in the circumferential direction, the tool connecting part of the combined machining tool Before the 31A {31K, 35K, 37K} is inserted into the main shaft holding part 30A, the circumferential positions of the protruding part and the notch part are matched. Thus, the tool connecting portion 31A {31K, 35K, 37K} can be inserted into the tool connecting sides 50A, 51A, 52A, and the tool connecting portion is relatively rotated with respect to the tool connecting side, so that the protruding portion is provided. And the locking claw portion are engaged. Thereafter, the tool connection side is pulled and clamped to the back side of the spindle. In a dedicated machine tool, tool replacement can be easily performed by manual operation as well as automatic operation.

  Further, when the combined machining tool 100 is removed from the spindle holding portion 30A of the spindle 30, the tool connecting sides 50A, 51A, 52A are pushed out to the spindle side and unclamped. Thereafter, the tool connecting portion 31A {31K, 35K, 37K} is rotated relative to the tool connecting sides 50A, 51A, 52A to disengage the projecting portion K2 and the locking claw portion K1. Then, the combined machining tool can be pulled out from the spindle holding portion of the spindle. With the above tool change operation, the combined machining tool 100 is automatically changed with respect to the spindle holding portion of the spindle 30. As a result, the combined machining tool 100 can be automatically attached / detached “automatic tool change” to / from the spindle holding part of the machining center, and in the dedicated machine tool, manual operation and tool change by automatic operation can be performed with one touch. Then, the finishing cutting by the cutting blades with respect to the valve seat and valve guide formed in advance in the cylinder head can automatically operate various dimensions under the biaxial control, and the processing efficiency is increased.

  Further, the tool body 100 is provided with the rotation transmitting means 80 for restricting the relative rotational amounts of the outer peripheral cylinder 31A, the intermediate cylinder 35, and the inner peripheral cylinder 37 with respect to the spindle holding portion 30A. Thus, the engagement and disengagement of the tool connecting portion and the spindle holding portion of the spindle can be accurately performed, and the rotational force of the spindle is transmitted to the outer cylinder, the intermediate cylinder, and the inner cylinder, so that the cutting is reliably performed. Also, the axial gap amount is set to be very small (about 0.01 mm) by setting the axial length of the K1 part (or K0 part) and the axial length of the main spindle K3 part (or K2 part) with high accuracy. ) Is high in the tracking accuracy of the tool connecting portion of the axial movement amount of the intermediate cylinder 35 and the inner cylinder 37 with respect to the outer cylinder 31B, and the cutting feed rate of the cutting edge can be uniformly controlled with high accuracy. .

  Explaining with an actual machining example, when cutting the valve seat VS and the valve guide VG in the cylinder head CH of a normal engine, when the driving outer cylinder arranged along the axis in the main shaft is driven forward and backward, the outer cylinder is The tool moves forward and backward, and moves the slider fitted in the slide groove inclined with respect to the axis of the tool holder, whereby the cutting tool moves in the inner and outer diameter directions to cut the valve seat surface. In addition, when the driving cylinder inside the driving outer cylinder inside the main shaft is driven forward and backward, the inner cylinder inside the tool holder moves forward and backward in the axial direction, and the reamer attached to the chuck means at the tip cuts the valve guide hole. Process. At this time, the detachment means CO (consisting of the rotation amount restriction means, the movement amount restriction, the guide portion, etc.) is free from axial backlash due to the coupling and performs highly accurate cutting and biaxial control.

  FIG. 7 shows an example of cutting the valve seat and the valve guide in the cylinder head CH of the engine. The numerical values are 37 mm for the length of the valve guide VG, 45 mm for the stroke of the reamer 40, 43 mm of the reamer 40 protruding from the tip of the reamer guide tube 41, and when the tip of the reamer guide tube 41 and the tip of the valve guide VG are closest. The gap is 1.4 mm. Of course, the present invention is not limited to the above numerical values, and the valve seats and valve guides in various types of cylinder heads can be cut.

According to the embodiment of the combined machining tool 100 of the present invention, the following effects are exhibited. Similar to a normal machining center, various tool sizes of the composite machining tool can be freely and automatically changed. In addition, the rotation transmitting means, the movement amount restricting means, and the guide portion increase the engagement / disengagement accuracy at the time of tool change, and there is no backlash in the axial direction, and each tool can be positioned with high accuracy under two-axis control. . Thereby, the finish cutting of the valve seat and the valve guide formed in advance in the cylinder head can be processed with high accuracy, and the valve seat and the valve guide of various dimensions can be automatically operated, and the processing efficiency is increased.
(1) Capable of cutting valve seats and valve guides of various dimensions, which are a plurality of types of workpieces. (2) According to this tool, the configuration is rational compared with the conventional tool, so the manufacturing cost is low, and it is an automatic or manual tool change method based on the standard tool shank method. Even if it is high, the mounting accuracy does not decrease. (3) Previously, automatic tool change was impossible, but automatic tool change was possible, and the reaming tool and valve seat processing tool for the valve seat and valve guide were separated and controlled with high precision by separate 2-axis control. it can.

  The present invention has been described as an example of the combined machining tool 100 that simultaneously cuts the valve seat and valve guide in the cylinder head of the engine, but the present invention can be applied as a combined machining tool for various uses. For example, the present invention can be applied as a tool for processing a surface of a general workpiece and processing a through hole at the same time.

  1 shows a first embodiment of the present invention and is an overall sectional view of a combined machining tool. FIG.   1 shows a first embodiment of the present invention and is a partial cross-sectional view of a combined machining tool. FIG.   1 shows a first embodiment of the present invention and is a partial cross-sectional view of a combined machining tool. FIG.   1 shows a first embodiment of the present invention and is a partial cross-sectional view of a combined machining tool. FIG.   1 shows a first embodiment of the present invention and is a partial cross-sectional view of a combined machining tool. FIG.   1 shows a first embodiment of the present invention and is a partial cross-sectional view of a combined machining tool. FIG.   BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a machining state of a composite machining tool according to a first embodiment of the present invention.

Explanation of symbols

30 Spindle 30A Spindle holding portion 31B Outer cylinder (tool body)
31A connecting part 31K, 35K, 37K tool connecting part 33 slide groove 35 intermediate cylinder 35E member 37E member 37 inner peripheral cylinder 37A rear end 40 reamer 47 guide parts 50A, 51A, 52A tool holding part 50 driving outer cylinder,
51 Driving middle cylinder 52 Driving inner cylinder 80 Rotation transmission means 90 Movement amount regulating means 100 Combined machining tool KO Notch K1 Locking claw K2 Protruding K3 Escape a, b Slope B Bite / cutting edge C Chuck means CH Cylinder head CO separation means L Axis L1 Axis M1, M2 Rotation allowance groove P1, P2 Stop pin S Slider X Middle cylinder movement limit Y Inner cylinder movement limit VS Valve seat VG Valve guide

Claims (2)

  The tool body that rotates on the axis includes an intermediate cylinder that fits in the outer cylinder and an inner cylinder that fits in the middle cylinder so that they are coaxial with the axis and movable in the axial direction. A combined machining tool having a cutting edge for a seat surface, a cutting edge for a hole at the tip of the inner peripheral axis, and a tool connecting portion engaged with and disengaged from a spindle holding portion of a machine tool on the rear end side of the tool body. The tool connecting portion includes a plurality of tool side engaging portions formed in an uneven shape at the rear end of each of the outer peripheral tube, the intermediate tube, and the inner peripheral tube, and is engaged with and disengaged from the tool connecting portion. The tool connecting side of the main spindle holding portion includes a main shaft side engaging portion formed in a concavo-convex shape at the tip of the driving outer cylinder, the driving middle cylinder, and the driving inner cylinder, and the tool body has an outer periphery with respect to the main spindle holding section. Rotation transmitting means for restricting the relative rotational angle in the circumferential direction among the cylinder, the intermediate cylinder, and the inner cylinder, and transmitting the rotational force, and the intermediate cylinder A movement amount restriction X, a movement amount restriction Y of the inner peripheral cylinder, and a guide portion when attaching / detaching the tool are provided, and a predetermined rotational angle phase difference between the tool side engagement portion and the spindle side engagement portion is generated. When the engagement is released, the tool connecting portion can be engaged with and disengaged from the tool connecting side, and the tool side engaging portion and the spindle side engagement are performed by relatively rotating the tool connecting portion and the tool connecting side. A combined machining tool, wherein the tool main body is coupled to the spindle holding portion of the machine tool by engaging the portion. 2. The combined machining tool according to claim 1, wherein the machine tool is a machining center or a dedicated machine tool.

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