JPH0419030A - Machine tool of tool head replacing type - Google Patents

Abstract

PURPOSE:To shorten the time for preparation for steps of procedure by holding a tool head by a carrier, which can travel between each processing unit and that of the stockers adjoining thereto, and fitting the processing unit with an index mechanism. CONSTITUTION:Stockers 3 are arranged in line between processing units 2, and on each stocker 3 a tool head 4 different from the tool head 6 on an elevating table 10 is placed in standby while held by a carrier 5. When processing is ended with a tool spindle 35 on the tool head 6, the elevating table 10 is raised while the tool head 6 is put in unclamped state. At this time, a tool head supporting pin of the carrier 5 is detained with a detaining hole in the tool head 6, while detention of the elevating table 10 with carrier 5 is disengaged. Then the carrier 5 in the stocker 3 is intruded into the elevating table 10, and the carrier 5 is intruded into the opposite stocker 3, and processing with the tool head 4 is carried out following a similar procedure.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a machine tool that processes a positioned workpiece by moving the tool head forward and backward, and the present invention provides a tool head in which an indexable tool head can be freely replaced. Concerning a replaceable single actuation mechanism.

(Prior Art) Conventionally, as a machine tool for positioning and processing a workpiece, a machine tool such as that disclosed in Japanese Patent Application Laid-Open No. 49-65575 has been known. In this machine tool, since the same machining station is machined using a plurality of tools, two tool support members are provided, and these tool support members are configured so that they can be selectively moved to the workpiece machining position. This is intended to eliminate loss time due to replacement, etc.

On the other hand, such machine tools have fewer tool heads,
In addition, the same machining technology is limited in its ability to perform multi-step machining or handle different types of machines.

A processing device such as that disclosed in Utility Model Publication No. 63-20531 is also known. This machining device is configured to increase the number of processes in the same machining station, and uses an index motor to selectively rotate multiple replaceable tools to the operating position to perform different types of machining, such as drilling and tapping. This corresponds to multiple machining steps, or cases where the workpiece is processed in close proximity and it is easier to divide the work into multiple steps than to perform simultaneous machining due to the arrangement of the tool spindle.

(Problem to be solved by the invention) However, even in cases such as the above-mentioned Utility Model Publication No. 63-20531, there is a limit to the number of processes that can be processed using the same stillage, and if this is exceeded, it is necessary to place the steel along the transfer line. It is necessary to add more machining units to be processed, and for different types of workpieces with different shapes and machining positions, it is necessary to replace all the tool heads of each machining unit, so the time required for setup changes is reduced. I had no choice but to leave it in this state.

(Means for Solving the Problem) In order to solve the problem, the present invention provides a machine tool in which an indexing mechanism and a tool head are provided on a movable table that can freely move forward and backward along a guide rail. The tool head is removably held by a carrier movable along the axis, and this carrier is configured to be movable between adjacent stockers. Therefore, a clamping mechanism was provided to remove the tool head of the carrier from the carrier and clamp it to the hollow shaft of the indexing mechanism. A connecting positioning mechanism for connecting and positioning the tool head was provided on one end surface of the hollow shaft. Further, a clamping cylinder that is movable along the axial direction of the hollow shaft is provided on the outer periphery of the hollow shaft, and a clamp rod that engages with this clamping cylinder via a spring is provided, and a link mechanism is installed in the clamp loft. A carrier positioning pin was connected through the carrier.

On the other hand, the tool head has a plurality of connection positioning parts and index positioning parts formed at equal intervals on the circumference, and an engagement hole for carrier engagement is provided in the vicinity of the connection positioning part and a plurality of index positioning parts, and a clamp engagement hole is provided in the vicinity of the connection positioning part and an index positioning part in accordance with the position of the clamp rod. A joint was set up.

Further, the machine tool is configured to be vertical, and a balancer member is connected to the drive motor of the vertical index mechanism via a bearing coaxial with the motor shaft.

(Function) When a tool head needs to be replaced, the carrier holding the tool head is moved toward an adjacent stocker, and instead of receiving a different type of tool head from a carrier waiting in another stocker. People. When indexing the tool head, the clamp mechanism clamps the tool head to the hollow index shaft and separates it from the carrier. In other words, the clamp cylinder provided on the outer periphery of the hollow shaft is actuated, the clamp rod and the clamp engagement piece of the tool head are engaged to separate the tool from the carrier, and the tool is attached to the connection positioning mechanism on the end face of the hollow shaft. The connecting and positioning portion of the head is engaged to hold the head in position. At the same time, the tool head and separate carrier are positioned using a carrier positioning pin that is linked to the clamp lock.

On the other hand, when this machine is used vertically, the indexing mechanism, which is a heavy object, is balanced by a balancer member connected to the drive motor of the indexing mechanism. In other words, support it to pull it upward.

(Example) An example of the tool head exchangeable machine tool of the present invention will be described based on the attached drawings.

Figures 1 to 3 are overall views showing an embodiment of the machine tool of the present invention configured as a vertical type, with Figure 1 being a side view, Figure 2 being a front view, and Figure 3 being a plan view. , Figures 4 and 5 are enlarged views of the main parts showing the internal structure, and Figure 4 is a side view.
FIG. 5 is a front view, and FIG. 6 is an enlarged view of the internal structure of the index mechanism viewed from the side.

First, an embodiment in which the machine tool of the present invention is configured as a vertical machine tool will be described.

As shown in Figs. 1 to 3, this vertical machine tool has a plurality of processing units 2 arranged in parallel to perform multi-step processing on a relatively small workpiece W positioned on a pallet 1. In preparation for this, a stocker 3 is arranged in a straight line between each processing unit 2. In these stockers 3, a tool head 4 of a different type from a tool head 6 of an elevating table 10 as a movable table, which will be described later, is held by a carrier 5 and on standby.

The machining unit 2 is configured to process multiple parts of the workpiece W using the same steel joint or to process different types of lids, and has an arm 8 extending forward from the top of the column 7, and a A lifting table 1o is provided with a vertical guide rail 9 and engages with this guide rail 9.
can be moved up and down by a lifting motor 11 on the arm 8. That is, as shown in FIG. 6, the threaded portion 10a of the lifting table 10 is screwed into a ball screw 13 connected to the drive shaft of the lifting motor 11, and the rotation of the ball screw 13 causes the lifting table 1o to move up and down.

On the other hand, the tip of the arm 8 is provided with a spindle drive motor 14 for driving a tool spindle, as shown in FIG. Main body casing 1
6 is passed through to enable connection to a tool head 6 on the carrier 5.

Furthermore, a balancer cylinder unit 19 as shown in FIG. 4 is attached as a balancer member to the distal end side of the arm 8, and a cylinder shaft 20 extending downward from the balancer cylinder unit 19 is integrated with the main body casing 16. The index motor 21 is connected coaxially with the rotating shaft of the index motor 21 via a bearing.

The tool head 6 of the lifting table 10 and the tool head 4 of the stocker 3 are replaceable.

That is, each tool head 4.6 is held by a respective carrier 5, and each carrier 5 is supported by a carrier support 22 of the stocker 3 shown in FIG. 4 or a carrier support part 23 of the lifting table 10, This carrier support part 23
is formed with the same structure as the carrier support 22. That is, the carrier support 22 of the stocker 3 is formed with a guide groove 22a extending in a direction perpendicular to the plane of the paper in FIG. 4, and the running roller 25 of the carrier 5 is fitted into this guide groove 22a. In other words, the carrier 5 is movable in the horizontal direction along this guide groove, and the guide groove 22a communicates with the guide groove provided in the carrier support part 23 on the lifting table 10 side when the lifting table 10 rises. is configured to do so.

(In addition, in Figures 4 and 5, the second lowering table 1 of processing unit 2
0 is falling. ) In other words, the carrier 5 is movable between the raised elevating table 10 and the stocker 3.

In the middle part of the carrier 5, there is an arm part 5 that projects forward.
A tool head support pin 26 is provided protrudingly on the tip a.

This tool head support pin 26 is connected to the tool head 4 which will be described later.
Or, it is used to hold and hold the 4th part.
They are provided as a pair in the front and back directions of the paper. At the lower end of the carrier 5, a carrier receiving roller 27 and a head receiving roller 28 are provided. and carrier receiving roller 2
7 is the carrier support 22 or lifting table 10 described above.
The carrier 5 contacts a guide plate 29 fixed to the lower end of the carrier support part 23, and moves along the guide plate 29 when the carrier 5 moves, and prevents the carrier 5 from tilting and holds it in an upright position. On the other hand, the head holder is a roller 28
When holding the tool head 6, which will be described later, the tool head 6
The tool head 6 is held in an upright position so that the tool head 6 does not tilt.

Connecting hooks 31 as shown in FIG. 345 are provided on both sides of this carrier 50. This connecting hook 31 is
Carrier 5 and stocker 3 of adjacent lifting table 10
The carrier 5 becomes freely engageable and detachable, and when the carrier 5 on the lifting table side descends due to the lowering of the lifting table 10,
The tooth shape is staggered so that the engagement with the carrier 5 on the stocker 3 side is released. (As for the meshing condition,
It is as shown in the plan view of Figure 's8. ) A tool head shift cylinder unit 32 as shown in FIG. 2 is connected to one end of the carriers 5 of the stockers 3 arranged at predetermined intervals. Therefore, by moving up and down the lifting tables 10 of all processing units 2,
The carrier 5 of the stocker 3 and the carrier 5 of the lifting table 10 are connected by each connecting hook 3 and form a straight line, and the tool heads 4 on the carrier 5 are shifted all at once by the reciprocating movement of the shift cylinder unit 32. becomes.

Next, the tool head 6 will be explained using FIGS. 6 and 7. Incidentally, FIG. 7 is a plan view of the upper surface of the tool head.

The tool head 6 of this embodiment is provided with four groups of tool spindles 35 in four different areas on its lower surface, and is configured in a circular shape. That is, the tool spindle 3 on the lower surface
The mounting surfaces of the fifth group are divided into four sections in the circumferential direction, and the four tool spindles 35 attached to each section are sequentially indexed by an indexing mechanism to be described later to process the workpiece. On the upper surface of the tool head 6, there are four
Projections 36 are provided at several locations. And this protrusion 36
A retaining hole 37 for inserting the tool head support pin 26 provided in the carrier arm portion 5a described above is provided in the projecting portion projecting toward the outer circumferential direction. Of the engagement holes 37 provided in each of the four protrusions 36, two engagement holes 37 on either side in two directions (left and right directions in FIG. 7)
is engaged with and held by a pair of tool head support pins 26 of the carrier 5.

Further, a head connection positioning groove 38 and a head index positioning groove 39 are provided on this protruding portion in a straight line along the radial direction. And head connection positioning groove 38
has a pair of engaging protrusions 40 protruding from both sides to form a groove, and four connecting positioning protrusions 54 on the lower surface of the index hollow shaft 47 of the indexing mechanism, which will be described later.
It is possible to engage with the

The head index positioning groove 39 is for positioning the tool head 6 after indexing, and is used to position the index positioning rod 6 of the index mechanism described later.
The lower ends of the rod 63 can be engaged with each other, and the lower ends of the rods 63 fit into the index positioning grooves 39 at any one of the locations.

Further, a pair of arc-shaped clamp engagement pieces 42 are provided at the inner upper end of the protrusion 36 . This clamp engagement piece 4
2 engages a clamp loft 50, which will be described later, when the tool head 6 is separated from the carrier 5 and pulled up, and the mounting position is on the shift direction side (first position) when the tool head 6 shifts together with the carrier 5. 7) is open.

Further, a serration clutch portion 44 for coupling with the spindle shaft 15 is provided at the center of the upper surface of the tool head 6, as will be described later.

On the other hand, a protrusion 36 is provided on the lower outer circumference of the tool head 6.
A support portion 43 is protruded in the outer circumferential direction and has a design number corresponding to the position of the support portion 43.
The upper head receiving roller 28 comes into contact with it. In other words, the tool head 4 is held on the hexagonal rear 5 by the two engagement holes 37 on the upper surface, and the two supporting parts 4 on the lower end side.
3 is supported by the head support roller 28 and held so as not to tilt.

Next, the index mechanism will be explained using FIG. 6.

A Geneva gear 45 is provided above the main body casing 16, and a crank member 46 for pitch-rotating the Geneva gear 45 is connected to the output shaft of the index motor 21. That is, the crank member 4 shown in FIG.
The pin 49 on the top surface of 6 enters the radial groove of the Geneva gear 45, and the Geneva gear 4 is rotated by one rotation of the crank member 46.
5 is rotated at a pitch of 90 degrees.

An index hollow shaft 47 is provided below the Geneva gear 45, through which the spindle shaft 15 shown in FIG. are combined with.

A flange portion 47a is provided on the outer periphery of the lower end portion of the hollow shaft 47. A four-piece wooden clamp rod 50 is provided on this flange portion 47a so as to be able to slide vertically, and the lower end side of this clamp rod 50 is attached to the clamp engaging piece 42 of the tool head 6 described above. It has a notch for hanging. As shown in FIG. 7, this notch has a semicircular cross-sectional shape so as not to interfere with the shift direction (up and down in FIG. 7) when the tool head 6 is replaced.

Further, the upper end side of the clamp rod 50 passes through a flange portion 51a of a clamp cylinder 51, which will be described below, and is engaged with the flange portion 51a.

That is, this clamping cylinder 51 has a hollow shaft 47
The upper end of the clamp rod 50, which is slidably fitted on the outer periphery of the clamp rod 50 and is movable up and down by operating pressure such as air pressure, and which freely passes through the flange 51a at the lower end of the clamp cylinder 51, is an annular disc. 52. The annular disk 52 is movable along the outer peripheral surface of the clamping cylinder 51, and a spring 53 is interposed between the annular disk 52 and the upper surface of the flange 51a of the clamping cylinder.

On the other hand, a positioning mechanism is provided on the lower surface of the hollow shaft 47. In other words, four coupling positioning protrusions 54 are provided for engaging the grooves 38 between the head coupling positioning engagement protrusions 40 on the upper surface of the tool head 6 described above. (See Figure 4) Therefore, the clamp cylinder 51 is moved upward, and the clamp blonde 50 is lifted up via the spring 53, and the notch at the bottom of the clamp cylinder 50 is hooked onto the clamp retaining piece 42 on the upper surface of the tool head 6. Then, the tool head 6 that was on the carrier 5 is separated from the carrier 5 and pulled up.

At this time, the serration portion formed at the lower end of the spindle shaft 15 and the serration clutch portion 44 at the center of the upper surface of the tool head 6 mesh with each other. At the same time, the hollow shaft 47
A connecting positioning protrusion 54 protruding from the lower surface is connected to the tool head 6.
The tool head 6 is clamped by engaging with the head connecting positioning groove 38 on the upper surface. Further, at this time, the separated carrier 5 is positioned, and the mechanism thereof will be explained below.

As shown in FIG. 6, in the vicinity of the annular disk 52, there is a bearing member 56 fixed to the main body casing 16 side, and a bearing member 56 that is supported by the bearing member 56 and has one end attached to the peripheral edge of the annular disk 52. An intermediate shaft 57 is provided for engagement. In order to allow the rotation of the annular disk 52, the engaging portion 57a is
It is made possible to slide between the peripheral edge portions. The other end of the intermediate shaft 57 is connected to a carrier positioning pin 59 via a link member 58. The intermediate portion of the link member 58 is pivotally connected to the main body casing 16 side so that the link member 58 can swing freely, so that the carrier positioning pin 5
9 is lowered, and the lower end is a positioning hole 60 provided in the carrier 5.
It will be inserted into. In other words, the position of the carrier 5 is fixed.

The tool head 6 thus clamped to the lower surface of the hollow shaft 47
can be separated from the carrier 5 for indexing, but a mechanism is provided to accurately position the rad 6 to the tool when indexing is completed and to release it during indexing.

That is, as shown in FIG. 4, a cam 61 is provided on the back surface of the crank member 46 that drives the Geneva gear, and one end side of the link member 62 that swings in contact with the cam 61 is biased downward. index positioning rod 6
It is connected to 3. The lower end protrusion 638 of this positioning rod 63 is engaged with the head index positioning groove 39 of the tool head 6 described above. Also, the cam 61 is
As the crank member 46 rotates, the pin 49 moves to the Geneva gear 45.
The abutting point of the link member 62 is positioned so as to be pushed down just before it engages with the tool head 6, so that the tool head 6 is released from the positioning rod 63 when the tool head 6 indexes. When the index rotation is completed, the positioning rod 63 descends again, and the lower end protrusion 63a engages with the head index positioning groove 39 of the tool head 6.

In addition, this index positioning rod 63 is 1m! is the position shown in FIG. 348, and FIG. 8 is an explanatory plan view showing the positional relationship between the carrier support and the carrier.

On the other hand, a spline is formed on the upper outer periphery of the spindle glaze 15, and this spline portion is spline-coupled to the motor shaft of the upper spindle drive motor 14 and is freely retractable into the drive motor 14.

The cylinder shaft 20 of the balancer cylinder unit 19 described above is coaxially connected to the motor shaft of the index motor 21 via a bearing 65, as shown in FIG. Therefore, even if the crank member 46 rotates together with the motor shaft, the cylinder shaft 20 will not be rotated.

Note that this balancer cylinder unit 19 is pressurized only in a direction that supports the force that pulls the cylinder shaft 20 downward.

Further, this balancer cylinder unit 19 may use a spring.

The outline of the operation of the tool head exchangeable machine tool configured as described above is as follows.

When the workpiece W on the pallet 1 is transferred to the processing unit 2 and positioned, the lifting table 10 that has already clamped the tool head 6 and was waiting above or is lowered by the lifting motor 1 6 and the tools that have been indexed in advance Machining is performed using the spindle 35.

When the machining is completed, the next tool spindle 35 is indexed. That is, when the elevating table 10 rises, the index motor 21 operates, and the Geneva gear 45 and the hollow shaft 47 are rotated by 90 degrees by the crank member 46.
Rotate the clamped tool head 6 by 90 degrees. At this time, the index positioning rod 53 that engages with the tool head 6 is once pulled up by the cam 61 on the lower surface of the crank member 46, and when indexing is completed, it is engaged again.

In this way, the four tool spindles 35 of the tool head 6
When the machining process is completed, the machining is continued using the tool head 4 of the stocker 3 that is waiting next to it, if necessary. That is, the lifting table 10 is raised and the clamping cylinder unit 51 shown in FIG. 6 is lowered to bring the tool head 6 into an unclamped state. Therefore, the tool head support pin 26 of the carrier 5 engages with the engagement hole 37 of the tool head 6, and the carrier positioning pin 5
9 moves upward, and the engagement between the lifting table 10 and the carrier 5 is released.

Next, by the movement of the shift cylinder unit 32 shown in FIG.
0, the carrier 5 in the lifting table 10 is pushed into the opposite stocker 3, and thereafter machining is performed using a different type of tool head 4 in the same procedure.

Next, an embodiment in which the present machine tool is a horizontal type will be described using FIGS. 9 to 16. Fig. 9 is a side view of the horizontal machine tool, Fig. 10 is a plan view of the same, Fig. 11 is a rear view of the same, Fig. 12 is a detailed side view of Fig. 9, and Fig. 13 is a side view of the horizontal machine tool.
The figure is a detailed plan view that is an enlarged version of FIG. 10, and FIG. 14 is a sectional view showing the internal structure in plan view.

This horizontal machine tool has almost the same configuration as the previously described vertical machine tool, and will be explained below with emphasis on the differences from the vertical machine tool.

That is, as shown in FIGS. 9 to 11, the base 107
A plurality of processing units 102 attached above are arranged in parallel, and a stocker 103 is provided between each processing unit 102.
are located on the same straight line. A workpiece W supported by a pallet 101 is positioned on the front side of this processing unit 102.
On the opposite side of the work W (left side in FIG. 9), processing units (not shown) are symmetrically provided so that both left and right sides of the work W can be processed simultaneously. For this reason, the 9th
Openings are provided on the left side surface of the pallet 101 in the figure, depending on the part of the workpiece W to be processed.

The processing unit 102 includes a support arm 108 provided on the back side of a base 107 and a left-right motor 111 attached to the support arm 108.
1 moves the movable table 110 to the guide rail 1.
It can freely reciprocate horizontally along 09.

Therefore, the main body casing 116, index motor 121, tool head 106, etc., which are integrally formed with the movable table 110, move forward and backward relative to the workpiece W.

Further, the index motor 121 is not provided with a balancer cylinder unit 19 like a vertical machine tool.

On the other hand, the carrier 105 that engages with the guide groove of the carrier support part 123 is made to be able to run freely in the guide groove by a running roller 125 shown in FIG. I am trying to use . FIG. 16 is a half-cut longitudinal sectional view showing the relationship between the carrier and the carrier support. Further, on the other end side of the carrier 105, the carrier receiving roller 127 shown in Fig. i12 is connected to the guide plate 129.
This is the same as in the case of a vertical type.

Also, as shown in FIG. 14, the clamp rod 15 engages with the clamp engagement piece 142 of the tool rod 106.
The shape of the notch of 0 is slightly different from that of the vertical type,
The clamp engagement piece 142 is shaped so that it can be held from both sides. That is, the tool head 106 can be moved left and right in conjunction with the left and right movement of the clamping cylinder 151. Therefore, when the clamping cylinder 151 operates from a state where the tool head 106 is clamped to the hollow shaft 147, the tool head 106 moves to the left, and the engagement hole 137 of the tool head 106 engages with the tool head support pin 126. At the same time, the lower outer periphery of the tool head is supported by head support rollers 128 shown in FIGS. 12 and 13.

As mentioned above, the differences from the vertical machine tool have been mainly described, but other than that, the configuration is the same as the vertical machine tool.

Also, the numbers in the figure are 1 for vertical type, 101 for horizontal type, and 2 for 10 for horizontal type.
2 and 63 correspond to 163, respectively.

In the case of such a horizontal type, since both sides of the workpiece W can be processed simultaneously as described above, it is possible to perform the work quickly.

(Effects of the Invention) As described above, the tool head exchangeable machine tool of the present invention has the following features:
A stocker is installed adjacent to the machining unit of each machining station, and the tool head is held on a carrier that can be moved freely between the machining unit and the stocker.In addition, the machining unit is equipped with an indexing mechanism, so that only one machining unit can be used. The number of machining steps that can be processed is significantly increased, and work loss time can be reduced. Therefore, it is particularly convenient when handling a variety of workpieces with different shapes or processing positions, and even workpieces that require multi-step machining can be processed smoothly and quickly.

[Brief explanation of the drawing]

Figures 1 to 8 show an embodiment in which the machine tool of the present invention is configured as a vertical machine tool, where Figure 1 is a side view of the entire device, Figure N2 is a front view of the same, and Figure 3 is a plan view of the same. ,'fS4 diagram,
Fig. 5 is an enlarged view of the main parts showing the internal structure, Fig. 4 is a side view, Fig. 5 is a front view, Fig. 6 is an enlarged view of the main parts of the index mechanism section as seen from the side, and Fig. 7 is FIG. 8 is a plan view showing the upper surface of the tool head, FIG. 8 is a plan view showing the relationship between the carrier and the carrier support, FIGS. 9 to 16 show examples when configured as a horizontal machine tool, and FIG. 9 shows the device. Overall side view, Figure 10 is the same plan view, Figure 11 is the same back view, Figure 12 is the same side view.
The figure is a detailed side view that is an enlarged version of Fig. 9, Fig. 13 is a detailed plan view that is an enlarged version of Fig. 10, Fig. 14 is a sectional view showing the internal structure in plan view, and Fig. 15 shows the end surface of the tool head. The rear view and FIG. 16 are half-cut vertical cross-sectional views showing the relationship between the carrier and the carrier support. In the figure, 1 is a pallet, 2 is a processing unit, 3 is a stocker, 4 is a tool head, 9 is a vertical guide rail, 10 is a lifting table as a movable table, 11 is a lifting motor, 14 is a spindle drive motor, 15 is the spindle axis,
19 is a balancer cylinder unit, 21 is an index motor, 26 is a tool head support pin, 3 is a connection hook, 32 is a shift cylinder unit, 35 is a tool spindle, 37 is an engagement hole, 38 is a head connection positioning part, 4
2 is a clamp engagement piece, 47 is a hollow shaft, 47g is a flange portion, 50 is a clamp rod, 51 is a cylinder for clamping, 59 is a carrier positioning pin, 101 is a pallet, 1
02 is a processing unit, 103 is a stocker, 105 is a carrier, 106 is a tool head, 107 is a base, 109 is a guide rail, 1] 0 is a movable table, 125 is a running roller, 126 is a tool head support pin, 127 is a carrier A receiving roller, 151 is a clamping cylinder, and W is a workpiece. patent ratio

Claims (4)

[Claims] (1) A machine tool in which an indexing mechanism and a tool head are provided on a movable table that can freely move forward and backward along a guide rail. A carrier is movable between guide grooves of adjacent stockers, and a clamp mechanism is provided for detaching the tool head from the carrier and clamping it to a hollow shaft of an indexing mechanism, and a tool head connection is provided on one end surface of the hollow shaft. A tool head exchangeable machine tool characterized by being provided with a connecting positioning mechanism for positioning. (2) A clamping cylinder that is movable along the axial direction of the hollow shaft is provided on the outer periphery of the hollow shaft, and a clamp rod that engages with the clamping cylinder via a spring is connected to the clamping cylinder via a link mechanism. The tool head exchangeable machine tool according to claim 1, wherein a carrier positioning pin is connected. (3) The tool head has a plurality of connecting positioning parts and index positioning parts formed at equal intervals on the circumference, an engagement hole for engaging with the carrier is provided in the vicinity thereof, and the clamp Claim 2, characterized in that a clamp engaging piece is provided corresponding to the position of the rod.
Exchangeable tool head machine tool described in . (4) The machine tool is configured as a vertical machine tool, and a balancer member is connected to the drive motor of the indexing mechanism of the vertical machine tool via a bearing coaxial with the motor shaft. 1. The tool head exchangeable machine tool according to 1.