DE102010003511A1 - Tool magazine for use in machine tool system for holding and storing tools attached to main spindle for processing workpiece, has recess aligned with tool transfer mechanism in rail such that tools are passed through recess - Google Patents

Abstract

The magazine (11) has main magazine parts (80a, 80b) holding tools (T). A tool transfer mechanism (140) transfers the tools among the main magazine parts and an auxiliary magazine (100). Multiple tool receivers (126) releasably hold the tools, and a rail (114) is slidingly engaged with outer surfaces of the receivers. A moving mechanism (112) moves the tool receivers to be engaged with the rail. A motor (120) activates the moving mechanism. A recess is aligned with the transfer mechanism in the rail such that the tools transferred from the transfer mechanism are passed through the recess. An independent claim is also included for a tool damage recognition device for a machine tool system, comprising a tool for operating a workpiece and removably attached to a processing unit.

Description

The invention relates to a tool magazine for holding and storing a plurality of tools detachably mountable for machining a workpiece on a main spindle, a machine tool system including such a tool magazine, and a tool damage detection device for use in a machine tool system.

Machine tool systems are known which have a tool magazine for holding and storing a plurality of detachable tools and which process a workpiece in different machining modes with the tools selected by the tool magazine, the tools being interchangeably mounted on a main spindle. Such machine tool systems should preferably occupy a small footprint to improve space utilization and facilitate transfer of workpieces between adjacent machine tools. It is preferred that a machine tool system has a narrow width in front view, in view of the relationship of the machine tool system to other devices within the factory. However, the machine tool system must have a sufficiently large tool magazine and a sufficient number of stored tools.

Japanese Patent Laid-Open Publication JP-A-2007-125642 discloses a tool changer combined with a machine tool and having a main tool magazine for storing tools and an auxiliary tool magazine for storing fewer tools than in the main tool magazine so that the tool changer can hold a larger number of tools without increasing the installation space. A tool in the main tool magazine is transferred to the main spindle as follows: A tool holder which holds the tool is rotated by 90 °, and then the tool is pulled out of the tool holder with a swing arm. The tool is then rotated 180 ° with the swivel arm and inserted (attached) into the main spindle. A tool in the auxiliary tool magazine is transferred to the main spindle in a similar manner.

In systems that use a variety of tools, it is important to capture the states of the respective tools in order to perform smooth and automatic machining operations, also in terms of cycle times. If z. For example, during a machining process, a tool is damaged by wear or the like, it is desirable to quickly detect the damage to the tool and replace the tool as needed to avoid shutting down the system.

The Japanese patent JP 3369712 B discloses a tool damage detection device incorporated in a turret system for machining a workpiece mounted on a translation unit that has been moved to its machining position. The displacement unit carries a machining head (group head) on which a plurality of tool spindles are rotatably mounted. The turret system includes four processing units arranged around a rotating shaft each having a plurality of tools, wherein the processing unit is rotated and indexed around the axis of the rotating shaft. One of the machining units indexed to a low position is used for machining a workpiece, whereas the tool damage detecting device is arranged in association with the machining unit indexed to an upper position opposite to the low position.

The in Japanese Patent Publication JP-A-2007-125642 The disclosed tool changing apparatus must perform at least three different actions when transferring a tool from a main tool magazine or an auxiliary tool magazine to the main spindle, including extracting a tool from a tool holder, pivoting the tool with the swing arm, and inserting the tool into the main spindle.

The above operations for transferring the tool are complex and involve the pivoting of the tool. Due to positional misalignments between the tool magazines and a tool gripper of the main spindle, as well as detachment of the tool from the pivot arm, such operations may result in a tool transfer error.

Since the tool is rotated by the pivot arm and shakes and vibrates laterally on the machine tool, it may possibly reduce the accuracy with which the workpieces can be machined and generate noise. Such lateral shaking and vibration should be minimized, especially in space-saving systems with reduced frontal width.

The in Japanese Patent no. JP-3369712 B The disclosed tool damage detection device serves to detect damage to a plurality of tools on a particular processing unit of the turret system.

Designating the processing units, from the processing unit in the lowest position for machining the workpiece, to consecutive letters "a" to "d", the processing unit is identified with "c" in an upper position associated with the tool damage detection device , When the turret system is controlled so that the workpiece is machined with the machining unit "a", which is initially in the lowest position, then the workpiece is machined with an adjacent machining unit "b", which is moved to the lowest position, and thereafter in this case, the machining unit "a" is not able to reach the tool damage detecting device during a plurality of machining cycles. Therefore, even if a tool used by the machining unit "a" is damaged during the first machining cycle, the damage from the tool damage detecting apparatus is not recognized and the tool is still used. In other words, if the workpiece is continuously processed only by a specific machining unit without rotating the pivot shaft, the damage of a tool in the machining unit is not recognized.

One solution could be to rotate the pivot shaft to enable the tool damage detection device to detect tool damage each time a machining unit processes the workpiece. However, in this case, the shutdown time of the system is extended and the cycle time is increased.

The object of the invention is therefore to provide a tool magazine that can transfer tools easily and stably.

Another object of the invention is to provide a machine tool system which can easily and stably transfer tools while preventing reduced accuracy of machining workpieces, and minimizes the noise generated by the machine tool system.

A still further object of the invention is to provide a tool damage detecting apparatus which is capable of quickly detecting the damage of a tool and avoiding system shutdowns as much as possible, thereby further improving the productivity.

To achieve the object, a tool magazine is provided, comprising a first tool magazine for holding a plurality of tools, which are detachably attachable to a main spindle for machining a workpiece; a second tool magazine for holding a plurality of tools and transferring tools to and from the first tool magazine; and a tool transfer mechanism for transferring tools between the first tool magazine and the second tool magazine. The second tool magazine includes a plurality of tool holders for releasably holding the tools therein; a rail in sliding engagement with outer surfaces of the tool holders; a moving mechanism for moving the tool holders into sliding engagement with the rail; and a drive source for activating the moving mechanism. In the rail, a recess is defined in alignment with the tool transfer mechanism so that the tools transferred from the tool transfer mechanism pass through the recess.

With the above arrangement, the recess allows the tool transfer mechanism to operate linearly to transfer tools linearly. In particular, because the recess is formed in the rail, a tool that moves along the rail of the second tool magazine can be transferred directly to and from the first tool magazine through the recess without having to pivot it around the rail. The tool can therefore be easily and stably transferred between the first and second tool magazines without risking its position being displaced or displaced. Therefore, transfer errors can be avoided.

Preferably, the transfer mechanism transfers the tools together with the tool holders to and from the second tool magazine and transfers the tools to and from the first tool magazine. With this arrangement, the tools can be transferred quickly and easily by moving the tool holders between the second tool magazine and the first tool magazine.

Preferably, the tool transfer mechanism moves linearly through the recess to transfer the tools between the first tool magazine and the second tool magazine. Therefore, the tools can be stably transferred.

Preferably, the first tool magazine has a plurality of first holders for holding the tools, wherein the second tool magazine a plurality of second holders for Holding the tool holders in cooperation with the rail, wherein the second holder attached to the movement mechanism and arranged opposite the rail, and the first holder and the second holder have respective openings for holding the tools therein. Further, the first holders and the second holders may be arranged such that when a tool is transferred in a tool transfer direction between one of the first holders of the first tool magazine and one of the second holders of the second tool magazine, the opening of the first holder and the opening of a second holder, with the interposed recess facing each other. With this arrangement, the tool can be easily transferred between the first holder and the second holder.

Preferably, the tool transfer mechanism includes a first moving member for moving the tool holders in the tool transfer direction, wherein the first moving member is positionable in the recess complementary to the rail; and a second moving member for moving the tool holders along a direction in which the tools are mounted in and detached from the tool holders. When a tool held by one of the tool holders is transferred between the first tool magazine and the second tool magazine, the one of the tool holders is moved by the first moving member between one of the second holder and the second moving member and becomes the tool by the movement of a tool holder in a the first holder attached and detached. With this arrangement, simply by moving the tool holder, the tool can be transferred directly to the first tool magazine.

The machine tool system of the invention includes a main spindle for supporting a detachably mounted tool for processing a predetermined area of a workpiece in cooperation with a pivot arm; a first tool magazine for holding a plurality of tools for removably attaching to the main spindle, the first tool magazine being rotatable to index one of the tools individually; a second tool magazine for holding a plurality of tools and transferring the tools to and from the first tool magazine; and a tool transfer mechanism for transferring tools between the first tool magazine and the second tool magazine. The main spindle has a rotation center about which the main spindle is rotatable, the first tool magazine having a center of rotation about which the first tool magazine is rotatable, and the second tool magazine having a tool transfer position for transferring the tools to and from the tool transfer mechanism, and wherein the center of rotation the main spindle, the center of rotation of the first tool magazine and the tool transfer position are arranged substantially in the same vertical plane.

With the above arrangement, since the center of rotation of the main spindle, the center of rotation of the first tool magazine, and the tool transfer position are substantially in the same vertical plane, the tools can be linearly and stably transferred on this substantially same vertical plane. Since the rotation axes of the rotatable components and the rotatable members are not displaced laterally, the entire machine tool system is prevented from shaking and vibrating laterally, and therefore the machine tool system is prevented from generating noise. Since the lateral wobbling and vibration movements do not affect the machining of the workpiece by the main spindle, the workpiece can be machined with higher accuracy.

Preferably, the first tool magazine has a tool transfer position for transferring tools to and from the tool transfer mechanism, wherein the tool transfer position of the first tool magazine is disposed in the substantially same vertical plane. This arrangement effectively prevents the machine tool system from shaking and vibrating laterally.

The tool transfer position of the second tool magazine can be arranged above the tool transfer position of the first tool magazine. With this arrangement, the space required for the machine tool system can be further reduced. Although the center of gravity of the machine tool system is relatively high because the second tool magazine is located in a high position, the machine tool system as a whole is stable because lateral shaking and swinging of the machine tool system is prevented.

Preferably, the power tool system further includes a rotary drive source for rotating the tool attached to the main spindle, the rotary drive source being coaxial with the rotational center about which the pivot arm is rotatable. This arrangement effectively prevents the machine tool system from shaking and vibrating laterally.

Preferably, the first tool magazine has a plurality of first holders for holding the tools, wherein the first holder of a The center of rotation, about which the first tool magazine is rotatable, extend radially outwards, and the second tool magazine has a plurality of second holders for holding the tools, wherein the first holder and the second holder have respective openings for holding the tools. The first holders and the second holders may be arranged such that when a tool is transferred between one of the first holders of the first tool magazine and one of the second holders of the second tool magazine, the opening of the first holder and the opening of the second holder in the substantially same vertical plane face each other. With this arrangement, the tools in the vertical plane can be easily transferred by the tool transfer mechanism while preventing the machine tool system from shaking and vibrating laterally.

According to the invention, a tool damage detection device is further provided in a machine tool system comprising a machining unit on which a tool for machining a workpiece is detachably mounted, and a plurality of tool magazines for storing a plurality of tools and for transferring the tools to and from the machining unit the tool magazines are rotatable to index the tools. The tool damage detection device comprises a carrier having a plurality of tool approaching elements for simultaneously approaching at least one of the respective tools stored in the tool magazines; a plurality of non-contact or contact-type detectors respectively attached to the tool approaching elements to detect damage to the tools; and a moving mechanism for moving the carrier in the axial direction of the tools.

With the above arrangement, the tool damage detection device can detect damage to tools stored in the tool magazines, and can detect damage to tools even while the workpiece is being machined by the machining unit. The tool damage detection device can therefore quickly detect damage to the tools. Since the tool damage detection device can detect damage to the tools even while the workpiece is being machined by the machining unit, it is possible to prevent the power tool system from being shut down. As a result, the machine tool system has higher production efficiency.

Preferably, the tool approaching elements have a structure to hold the tool approaching elements out of physical interference with tools having the smallest and largest axial lengths of the tools stored on the tool magazines when the tool approaching elements are held by the moving mechanism in a position closest to the tools , Therefore, the tool approach elements can be used to detect damage to tools at all lengths used.

Preferably, the detectors are fixed in respective positions for detecting damage to the tools having the smallest and largest axial lengths of the tools stored on the tool magazines, as the tool approaching elements approach the tool by the moving mechanism from the next position be moved away from the tools most distant position. With this arrangement, the detectors can reliably detect damage to tools of all lengths used.

Preferably, the tool approaching elements have a structure to hold, as the tool magazines rotate, the tool approaching elements other than physically interfering with the tools stored on the tool magazines when the tool approaching elements are held by the moving mechanism at a position closest to the tools. With this arrangement, while the damage of one tool to one of the tool magazines is detected, another tool magazine can be rotated to automatically change the tools on the processing unit.

Preferably, the tool approaching elements are arranged the tool approaching elements in a position for handling tools, which are stored on at least two of the tool magazines, if, upon rotation of the at least two tool magazines, the tools are indexed to each other next positions. The thus constructed tool damage detection device can be made small.

The above and other objects, features and advantages of the invention will become more apparent from the following description when taken in conjunction with the accompanying drawings in which preferred embodiments of the invention are shown by way of example.

1 Fig. 10 is a partially cutaway perspective view of a machine tool system including a tool magazine according to a first embodiment of the invention;

2 is a front view of the in 1 shown machine tool system;

3 is a side view of the in 1 shown machine tool system;

4 is a sectional side view of a support body and a main spindle of the in 1 shown machine tool system;

5 is a partially cutaway perspective view showing how the tools from a main magazine in the 1 to be changed machine tool system shown;

6 is an enlarged side view of a pillar, main magazine and adjacent parts during tool change, as in FIG 5 shown;

7 is a perspective view of a tool holder;

8th FIG. 10 is an enlarged front view of a tool magazine according to the first embodiment; FIG.

9 is a perspective view of the in 8th shown tool transfer mechanism;

10A is a side view of the in 9 shown tool transfer mechanism;

10B is a side view of the tool transfer mechanism, the hand of the in 10A shown lowered state;

11A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

11B is a front view of the portion of the tool magazine in the vicinity of the recess of 11A ;

11C is a side view of the section of the tool magazine nearby in 11A shown depression;

12A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

12B is a front view of the portion of the tool magazine near the in 12A shown depression;

12C is a side view of the section of the tool magazine near the in 12A shown depression;

13A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

13B is a front view of the portion of the tool magazine near the in 13A shown depression;

13C is a side view of the section of the tool magazine near the in 13A shown depression;

14A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

14B is a front view of the portion of the tool magazine near the in 14A shown depression;

14C is a side view of the section of the tool magazine near the in 14A shown depression;

15A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

15B is a front view of the portion of the tool magazine near the in 15A shown depression;

15C is a side view of the section of the tool magazine near the in 15A shown depression;

16A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

16B is a front view of the portion of the tool magazine near the in 16A shown depression;

16C is a side view of the section of the tool magazine near the in 146 shown depression;

17A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

17B is a front view of the portion of the tool magazine near the in 17A shown depression;

17C is a side view of the section of the tool magazine near the in 17A shown depression;

18A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

18B is a front view of the portion of the tool magazine near the in 18A shown depression;

18C is a side view of the section of the tool magazine near the in 18A shown depression;

19A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

19B is a front view of the portion of the tool magazine near the in 19A shown depression;

19C is a side view of the section of the tool magazine near the in 19A shown depression;

20A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

20B is a front view of the portion of the tool magazine near the in 20A shown depression;

20C is a side view of the section of the tool magazine near the in 20A shown depression;

21A Fig. 12 is a plan view of a portion of the tool magazine near a recess;

21B is a front view of the portion of the tool magazine near the in 21A shown depression;

21C is a side view of the section of the tool magazine near the in 21A shown depression;

22 Fig. 12 is a schematic view of the layout of center axes and operating centers of various elements of the machine tool system;

23 Fig. 15 is a partially cutaway perspective view of a machine tool system including a tool damage detecting apparatus according to a second embodiment of the invention;

24 is an enlarged side view of a pillar of a main magazine and of adjacent parts, while tools in the in 23 to be changed machine tool system shown;

23 is a perspective view of in 23 shown tool damage detection device;

26 FIG. 11 is a plan view partially omitted for illustrative purposes, which is shown in FIG 23 shown tool damage detection device, together with main magazines in which tools are indexed to a tool damage detection position;

27 Fig. 13 is a partial front view of the layout of tools stored in main magazines, and tool approaching devices of the tool damage detecting apparatus according to the second embodiment;

28 FIG. 10 is a flowchart of a damage detection sequence implemented in the tool damage detection apparatus of the second embodiment; FIG.

29A Fig. 10 is a plan view showing how the tool approaching devices of the tool damage detecting device of the second embodiment are moved toward the tools;

29B Fig. 10 is a plan view showing how the tool approaching devices of the second tool damage detection device according to the second embodiment are moved away from the tools;

30 FIG. 10 is a perspective view of a tool damage detecting apparatus according to a first modification; FIG.

31 FIG. 11 is a top view of a tool damage detection device according to a second modification and main magazines having tools indexed in a tool damage detection position; FIG.

32 Fig. 10 is a front view of an assembly including a tool damage detecting apparatus according to a third modification; and

33 FIG. 10 is a front view of an arrangement including a tool damage detecting apparatus according to a fourth modification. FIG.

Hereinafter, the same or corresponding parts will be denoted by the same or corresponding reference numerals in all views.

The tool magazines of the preferred embodiments are described below in connection with machine tool systems incorporating such tool magazines, together with a tool damage detection device for detection in machine tool systems, with reference to the accompanying drawings.

First, a first embodiment will be described.

1 is a partially cutaway perspective view of a machine tool system 10 that is a tool magazine 11 according to the first embodiment. 2 is a front view of the in 1 shown machine tool system, and 3 is a side view of the in 1 shown machine tool system 10 , The machine tool system 10 Machining workpieces W by drilling, milling, honing, etc. For respective orientations of the machine tool system 10 to define the horizontal directions in 2 X directions (X1, X2 directions), the vertical directions as Y directions (Y1, Y2 directions), and the depth directions orthogonal to the X and Y directions as Z directions (Z1, Z2 directions) (see 3 ). The X and Y directions refer to the respective directions in a plane perpendicular to each other.

The machine tool system 10 includes a first machine tool 10a on the left side (side in the X1 direction) in the front view of 2 is arranged, a second machine tool 10b located on the right side (side in the X2 direction), a controller 12 for controlling the first machine tool 10a and the second machine tool 10b in a consolidated and coordinated manner, as well as a tool magazine 11 holding a plurality of detachable tools T. The first machine tool 10a and the second machine tool 10b are arranged parallel to each other and share a common base plate 13 , a workpiece moving device 14 as well as a frame 15 , However, each of the first and second machine tools may 10a and 10b alternatively a separate base plate 13 , a separate workpiece moving device 14 and a separate frame 15 exhibit. As in the present embodiment, the first machine tool 10a and the second machine tool 10b are structurally identical, hereinafter mainly the first machine tool 10a described.

The basis of the first machine tool 10a forms a base plate 13 which is fixed to the ground. The base plate 13 is narrow in the X directions and low in the Y directions. The workpiece moving device 14 and the frame 15 are on top of the base plate 13 appropriate.

The workpiece moving device 14 contains respective workpiece tables 19a . 19b . 19c that over a section of the top of the base plate 13 near the front end of the machine tool system 10 are arranged in the Z direction. Tool pressing and fixing devices 17a . 17b (please refer 3 ) for pressing down and fixing on the work tables 19a . 19b . 19c arranged workpieces W are above the workpiece moving device 14 arranged. In the present embodiment, the workpiece tables include 19a . 19b . 19c Turntables spaced apart by angular intervals of 120 °. In the 1 . 2 and 5 are the workpiece pressing and fixing devices 17a . 17b has been omitted for illustrative purposes, the support body 22 and the swivel arm 32 etc. to make visible.

As in 1 shown, the frame bears 15 the tool magazine 11 that stores a plurality of tools T. The tool magazine 11 includes a pair of main magazines (first tool magazines) 80a . 80b , each of the first tool magazine 10a and the second machine tool 10b and an auxiliary magazine (second tool magazine) 100 , above and behind the main magazines 80a . 80b is arranged in the Z2 direction.

The frame 15 includes four support posts 15a extending from opposite ends of the base plate 13 extend upward and are spaced apart in the Z direction, and a plate 15b attached to the upper ends of the support posts 15a is attached. The help magazine 100 stands on legs 105 at an end portion of the plate 16b in the Z2 direction and has a rectangular shape, which may also have a slightly elliptical shape, ie with rounded corners, and which is elongated in the Z-axis direction. The four support posts 15a include two sets of two support posts 15a , which are spaced apart in the Z direction, respectively, and apertures 107 between the two support posts 15a are arranged, which represent the respective sentences. The irises 107 prevent chips and machining oil from being discharged laterally from the machine tool system 10 splattered while the workpiece W is being processed The apertures 107 can be opened when the main spindles 16 , which serve to process the workpieces W with the tools T, are serviced.

The first machine tool 10a includes a pair of Z-rails 16 at the top of the base plate 13 are arranged and extending in the Z-axis direction, a column 18 which is slidable in the Z-axis direction and from the Z-rails 16 a pair of Y-rails 20 at the front of the pillar 18 are arranged and extend in the Y-axis direction, and a support body 22 which is in the Y-axis direction is displaceable while moving from the Y-rails 20 is led (see 2 ). The pillar 18 on the Z rails 16 is displaceable, has a position in the Z-axis direction, that of a Z-position sensor 16a is detectable. Similarly has the support body 22 standing on the Y rails 20 is displaceable, a position in the Y-axis direction, that of a Y-position sensor 20a is detectable. The recorded positions of the column 18 and the supporting body 22 become the controller 12 fed.

The pillar 18 is by means of a ball screw mechanism 26 movable in the Z-directions forward and backward, with the ball screw mechanism 26 with a Z-engine 24 connected behind the base plate 13 is arranged (see 3 ). The Z engine 24 can be combined with a rotary encoder, not shown, the rotation angle of the threaded rod of the ball screw mechanism 26 detected. The detected rotation angle from the rotary encoder to the controller 12 be fed as a signal indicating the position in the X-axis direction of the column 18 represents.

The supporting body 22 is by means of a ball screw mechanism 30 movable back and forth in the Y directions, the ball screw mechanism 30 with a Y-engine 28 connected in the base plate 13 is arranged (see 2 ). The Y engine 28 can be combined with a rotary encoder, not shown, the rotation angle of the threaded rod of the ball screw mechanism 30 detected. The detected rotation angle may be from the rotary encoder to the controller 12 be supplied as a signal representing the position in the Y-axis direction of the support body 22 represents. The pillar 18 and the Y-rails 20 extend in the Y-axis direction to allow the support body 22 can move over a relatively long distance in the Y-directions.

As in 4 shown, includes the support body 22 a swivel arm 32 which rotates about its own axis in a vertical plane (XY plane) facing the workpiece W and in the Z1 direction at a distance from the supporting body 22 is arranged, an arm motor 34 for turning the swivel arm 32 , a main spindle 36 attached to the swivel arm 32 rotatably mounted and oriented in the Z1 direction, and a spindle motor 38 for turning the main spindle 36 about their own axis. The arm motor 34 includes z. B. a direct drive motor. The supporting body 22 contains a frame 40 as a base and takes the arm motor 34 on. The arm motor 34 includes a stator 34a in the frame 40 is fixed, and a hollow rotor 34b who is in the stator 34a is arranged.

The swivel arm 23 is at one end of the rotor 34b attached in the Z1 direction and is from the arm motor 34 turned when the arm motor 34 is turned on. The angle of the swivel arm 32 in relation to the support body 22 is from an angle sensor 41 (please refer 1 ) and the controller 12 fed. Although the swivel arm 32 according to 4 can be pivoted (turned) endlessly, the swivel arm 32 to be able to rotate at least one revolution (360 °). The main spindle 36 is disposed at a distance R from the axis (turning center) C1, around which the swing arm 32 rotates.

A balance weight 42 is on one side (the top in 4 ) of the swivel arm 32 arranged, which is diagonally opposite the main spindle 36 , The balance weight 42 comprises a liquid tank containing and capable of holding liquid, such as coolant or the like, the swing arm 32 balanced by changing the amount of liquid therein in response to a tool attached to the main spindle 36 is appropriate. The balance weight 42 may alternatively have a metal weight. The swivel arm 32 , except the balance weight 42 , includes a hollow interior structure. The swivel arm 32 is compared to the support body 22 relatively lightweight, and the swivel arm 32 affects the stability of the support body 22 and the first machine tool 10a not when the swivel arm 32 is turned.

A rear section of the spindle motor 38 stands from the frame 40 in front of the Z2 and is at a back of the frame 40 of the supporting body 22 coaxial with the arm motor 34 aligned aligned. Because the spindle motor 38 and the arm motor 34 coaxial with each other (ie, the axis C1, around which the pivot arm 32 rotates and the axis (turning center) around which the rotating shaft of the spindle motor 38 rotates, rotate coaxially with each other), is the supporting body 22 constructed as a compact unit. Furthermore, the spindle motor 38 with the axis of the main spindle 36 is not coaxial, but instead at the center of the swing arm 32 can be arranged, mass and size of the balance weight 42 be reduced to allow the support body 22 overall is compact.

A wave 44 extends through a hollow area of the rotor 34b , and you one end is on the rotary shaft of the spindle motor 38 attached, and her other end is from the frame 40 to an end plate of the swing arm 32 in the Z1 direction. The wave 4 is at respective warehouses 45a . 45b . 45c at the end of the swivel arm 32 in the Z1 direction, the end of the swivel arm 32 in the Z2 direction and at the end of the frame 40 rotatably mounted in the Z2 direction.

A belt mechanism 46 includes a drive pulley 46a on the shaft 44 between the camps 45a . 45b is firmly attached, an output pulley 46b at one end of the main spindle 36 firmly attached in the Z2 direction, as well as an endless belt 46c , around the drive pulley 46a and the driven pulley 46b is lying around. The belt mechanism 46 , which is composed of the pulleys and the endless belt, has the advantage that the belt mechanism 46 a low weight of the swivel arm 32 allowed. The belt mechanism 46 can be replaced by a driving force transmission mechanism, which instead of the drive pulley 46a a gear, instead of the driven pulley 46b contains a pinion and instead of the endless belt 46c a silent chain. Instead of the silent chains, a plurality of gears disposed in driving engagement between the gear and the pinion may be used to thereby drive the driving force from the spindle motor 38 on the main spindle 36 transferred to.

The belt mechanism 46 is in a hollow area of the swivel arm 32 arranged. The endless belt 46c is tensioned by a clamping mechanism, not shown. The rotation of the spindle motor 38 gets through the shaft 44 and the belt mechanism 46 on the main spindle 36 transfer.

The main spindle 36 is in a main spindle cover 48 taken with the swivel arm 32 is integrally coupled. A tool head 50 for supporting an inserted tool T is at an end tip of the main spindle 36 arranged in the Z1 direction. A release lever 52 for releasing the clamping of the tool T from the tool head 50 to release the tool T is at one end of the main spindle 36 arranged in the Z2 direction. The release lever 52 has a shape slightly protruding outward from the axis C1. If the release lever 42 from a dissolution block 53 is pressed towards the axis C1 (see 6 ), becomes the release lever 52 moved to the tool T from the main spindle 36 to solve. If the release block 53 from the release lever 52 is moved away, the release lever returns 52 by an elastic element not shown back to its original position, thereby a tool T in the tool head 50 to pinch. Alternatively, an electrical mechanism for clamping and releasing a tool T into the main spindle 36 be installed.

A fixation device 64 is on a back of the swivel arm 32 attached, which points in the Z2 direction to the swivel arm 32 by grabbing a slice 62 , which has a leaf spring or the like., With a screw 60 to fix in a given position. The fixation device 64 includes a seat 66 That's against the back of the disc 62 is present, and a presser 68 to grab the disc 62 between the presser 68 and the seat 66 , The presser 68 is at the outer end of a pole 72 attached by a disc spring 70 towards grabbing the disk 62 is biased. If the rod 72 against the disc spring 70 pushed forward, the disc becomes 62 solved, so that the swivel arm 32 can turn. As in the present embodiment, the disc 62 having a leaf spring, the pivot arm falls 32 not around while the disc 62 is taken, and a rotation of the pivot arm 32 is reliably prevented.

As in 1 shown is the main magazine 80a , the first machine tool 10a is associated with and stores therein a plurality of tools T, which at the main spindle 36 can be removably attached, over a left in the X1 direction extending left portion of the top of the plate 15b arranged. The main magazine 80b , that of the second machine tool 10b is assigned and one to the main magazine 80a has identical mechanism, is over a extending in the X2 direction right portion of the top of the plate 15b arranged. The following is primarily the main magazine 80a described.

As in the 1 and 6 shown has the main magazine 80a the shape of a rotatable magazine that has a rotating shaft 82 which extends in the Z-axis direction, a magazine motor 83 for turning the rotary shaft 82 about its own axis and a plurality of retaining arms 84 that are about the rotation shaft 82 extend radially outward and which are arranged at an angular distance of about 270 °, when viewed in front view (see 2 ). Each of the retaining arms 84 contains a substantially C-shaped handle (first holder) 85 at its distal end for gripping a tool T. The handle 85 comprises an elastic member which can be elastically spread to permit insertion of a tool T when the tool T passes through an opening of the C-shaped handle 85 in the grip 85 is pressed, and the tool T can grip and hold after the tool T in the grip 85 has been used. The tool T, that of the handle 85 can be taken through the opening of the C-shaped handle 85 forcibly pulled out. The main magazine 80a can consist of about 16 support arms 84 consist. Each of the handles 85 can grasp the tool T directly by an annular groove defined in the tool T, without a tool holder described later 126 have to record in between.

The main magazine 80a has a section that is free from the support arms 84 and which extends within an angular range of about 90 °, the other of the angular range is about 270 °, in FIG those holding arms 84 are arranged at angular distance. If then the workpiece W is processed or if the main magazine 80a is not in use becomes the section of the main magazine 80a , which free of the holding arms 84 is oriented downwards (see 2 ). Since this is the main magazine 80a completely over the plate 15b is arranged disturbs the main magazine 80a the pillar 18 and the support body 22 not while they work. If a given tool T at the main spindle 36 to be replaced, becomes the main magazine 80a turned so that a desired holding arm 84 from the end of the plate 16b oriented downwards (see 5 ).

In particular, a free arm is 84 that has no tool T, oriented down. After the position of the column 18 has been set in the Z-axis direction, becomes the supporting body 22 raised. As in 6 shown, the tool T from the support arm 84 held, and the release lever 52 is from the release block 53 posted and pressed, with the release block 53 from the top of the pillar 18 extends down to thereby the tool T from the tool head 50 to solve. Then the pillar 18 retracted in the Z2 direction to the tool T from the tool head 50 pull it out.

The main magazine 80a is turned so that the holding arm 84 that holds the tool T to be used, is oriented and then the column 18 is moved in the Z1 direction. In this case, the tool T in the tool head 50 used. The supporting body 22 is lowered to the release lever 52 from the release block 53 move away, whereupon the tool T in the tool head 50 is trapped. After that, the main magazine 80a turned to all the support arms 84 over the plate 15b to position as in 2 shown.

Because no mechanism between the main magazine 80a and the main spindle 36 for the transfer of tools T is arranged, and there each of the support arms 84 directly a tool T can grasp, by operation of the column 18 , of the supporting body 22 and the swivel arm 32 , the tools directly in the tool head 50 attached and detached from it. Insofar as no separate attachment and release mechanism is required, the main magazine has 80a a simple structure, and the time required for attaching and detaching the tools T is short.

As in the 1 to 3 shown is the help magazine 100 in the Z2 direction at a distance from the main magazines 80a . 80b arranged and is on the legs 105 attached to the plate 15b stand up. The help magazine 100 carries the tools T over the holding arms 84 the main magazine 80a . 80b , The help magazine 100 is across the main magazines 80a . 80b arranged when viewed in front view in 2 , The help magazine 100 , which has the shape of a rotary magazine with a rectangular shape similar to an elliptical shape (ie, with rounded corners), the main magazines 80a . 80b operate simultaneously. The help magazine 100 is rotatable in the horizontal plane (XZ plane) for indexing the tools T.

The help magazine 100 includes a substantially rectangular base frame 110 , on the legs 105 is attached, a movable chain 112 that surround the outer perimeter edge of the base frame 110 extends around and a rail (tool movement rail) 115 that under the chain ( 112 ) of the Y2 direction is arranged and parallel to the chain 112 around the outer perimeter edge of the base frame 110 extends.

The chain 112 has a substantially rectangular shape with four round corners. One of the four rounded corners of the chain 112 has an inside, which has a drive gear 122 engaged by a motor (drive source) 120 whereas the three remaining rounded corners have inner surfaces that are driven by driven gears 124 engage. Therefore, the chain 112 along the peripheral edge of the base frame 110 moveable all around.

A plurality of adjacent support arms 118 is on the chain 112 with given intervals along the chain 112 attached. The holding arms 118 are essentially Y-shaped and have approximately the shape of the support arms 84 , However, the holding arms hold 118 indirectly the tools T, which are in the respective tool holders 126 are attached, by engagement with the tool holders 126 ,

Each of the retaining arms 118 has a narrow rod-shaped section that ends in one end and on the chain 112 fixes it, as well as a fork (second holder) 116 which terminates in an opposite end and extends down in the Y2 direction so that each of the support arms 118 is open towards the bottom ( 1 and 8th ). Unlike the handles 85 the holding arms 84 includes the fork 116 a forked element that does not include an elastic mechanism or movable section. Each of the retaining arms 118 holds a tool holder 126 (Tool T) in the fork 116 is inserted by the tool holder 126 (the tool T) from the fork 116 and the rail 114 is surrounded. The help magazine 100 can store a plurality of tools T in this way. The help magazine 100 can z. B. approximated 80 holding arms 118 exhibit. The rail 114 can z. B. a movable section on the back of the machine tool system 10 in the Z2 direction. The movable portion can be manually operated by the operator to the tool holders 126 and those of the holding arms 84 worn tools T exchange.

The drive gear 122 that from the engine 120 drive is the chain 112 and the output gears 124 together form a movement mechanism that causes the retaining arms 118 the tool holders 126 (Tools T) in sliding engagement with the rail 114 move. The chain 112 and the gears 122 . 124 can each be replaced by belts and pulleys, thereby forming a belt and pulley mechanism for moving the tool holders 126 (Tools T) to form. Furthermore, instead of the engine 120 , a linear motor can also be used as the drive source. Therefore, various such movement mechanisms can be applied insofar as these mechanisms are the support arms 118 can move smoothly.

As in 7 shown here is each of the tool holders 126 as a tool sleeve 126 constructed having a substantially hollow cylindrical receptacle, the axially extending upper, lower, left and right flat facets on its outer peripheral surface 126a whose position is from the fork 116 is held. The tool holder 126 contains in its front end a mounting hole 128 for releasably holding a tool T. Each of the left and right flat facets 126a includes a pair of axially spaced slots 130 . 132 extending in the Y-directions perpendicular to the axis of the tool holder 126 extend.

If, as in the 6 and 7 shown the fork 116 of the support arm 118 in the Y2 direction in the slots 130 is used, the holding arm holds 118 the upper facet 126 and the left and right sides of the tool holder 126 , If the lower facet 126a at the rail 114 is applied, the tool holder 126 (The tool T) kept overall reliably positioned. After that, the chain 112 from the engine 120 revolving around the fork 116 gripped tool holder 126 (the tool T) together with the chain 112 to move while the lower facet 126a on the rails 114 slides. The rail 114 should preferably be made of a material that allows smooth sliding of the tool holder 126 slides on it, z. Resin material such as nylon (polyamide), fluoroplastic or the like.

As in the 2 and 8th shown, contains the rail 114 in sliding contact with the tool holders 126 held in its edge a pair of depressions 134a . 134b which point in the Z1 direction, whereas the depressions 134a . 134b in vertical alignment with the main magazines 80a . 80b are arranged.

As in 8th shown are the wells 134a . 134b each with the rotary shafts 82 the main magazine 80a . 80b aligned in the Y-directions. In particular, the axes (rotational centers) C2, around which the main magazines 80a . 80b rotate, and the center positions C4 of the recesses 134a . 134b in the transverse directions (X-directions) in the Y-direction aligned with each other. Because the pits 134a . 134b and the rotary shafts 82 in the same vertical plane (YZ plane in 22 ) are, when the holding arms 84 the main magazine 80a . 80b indexed to their highest positions in the Y-axis direction, the holding arms 84 in vertical alignment with the wells 134a . 134b arranged. If then the retaining arms 118 of the auxiliary magazine 100 to be indexed to positions with the wells 134a . 134b are aligned, the retaining arms 118 opposite the support arms 84 arranged in the highest positions in the X direction, with the depressions 134a . 134b are arranged between them.

The tool magazine 11 is therefore able according to the present embodiment, the openings of the handles 85 and the forks 116 the indexed holding arms 84 . 118 to be vertically opposed to each other in the X-axis direction as viewed in the front view of FIG 8th ,

The tool magazine 11 contains a pair of tool transfer mechanisms (tool changers) 140 that the respective wells 134a . 134b are assigned, ie their operating centers C3 are aligned with the center positions C4 of the wells 134a . 134b in the Y-axis direction. For the sake of brevity, are in 8th the center positions C4 of the depressions 134a . 134b slightly lowered. In reality, however, are the middle positions C4 of the wells 134a . 134b at the same height as the rail 114 , When the tool transfer mechanisms 140 be activated while the openings of the handles 85 and the forks 116 Assign to each other, the tool transfer mechanisms 140 the tools T between the main magazines 80a . 80b and the help magazine 100 easy and stable transfer.

9 shows one of the tool transfer mechanisms 140 in perspective. 10A shows a side view of the in 9 illustrated tool transfer mechanism 140 , and 10B shows in side view the tool transfer mechanism 140 , being a hand 146 of it from in 10A shown lowered state. The 9 . 10A and 10B show the tool transfer mechanism 140 , the main magazine 80b and the depression 134b assigned. The other tool transfer mechanism 140 , the other main magazine 80a and the other depression 134a is basically identical to the one in the 9 . 10A and 10B shown tool transfer mechanism 140 except that the structure is substantially symmetrical and therefore the other tool transfer mechanism becomes 140 not described in detail below.

As in the 9 . 10A and 10B shown includes the tool transfer mechanism 140 an engagement element (second movement element) 144 which is substantially U-shaped in front view and extends upward in the Y1 direction. The engagement element 144 has a pair of fingers 142 for gripping the respective slots 132 a tool holder 126 , as well as a hand (first movement element) 146 , which is substantially C-shaped in side view, and between the fingers 142 is arranged. The engagement element 144 and the hand 146 are on a frame 148 appropriate.

The engagement element 144 is in the Z-directions by means of a pair of guide rods 154 floating, with a rod 152 a cylinder mechanism 150 connected, which is also movable in the Z-directions back and forth.

The hand 146 has a substantially C-shaped structure, with a top plate 156 which extends parallel to the horizontal plane (XY plane) and a lower plate 158 , which are parallel to the top plate 156 in the Y2 direction and spaced therefrom. The bottom plate 158 is further in the Z1 direction than the upper plate 156 , The distance between the top plate 156 and the lower plate 158 is set to a predetermined value sufficient that one of a holding arm 118 moving tool holder 126 between the top plate 156 and the bottom plate 158 is used in the X-axis direction (see 10A ).

Sliding elements 156a . 158a are each on the inner surfaces of the upper plate 156 and the lower plate 158 appropriate. The sliding elements 156a . 158a are made of a material that allows a smooth sliding of the tool holder 126 allowed, as in the case of rail 114 , For example, the sliding elements 156a . 158a plastic material such as nylon (polyamide), fluorine resin or the like, or a metal material such as copper alloy, aluminum alloy or the like. A slider 160 is attached to the back of a connection, which is the top plate 156 with the lower plate 158 connects and extends vertically in the Y-axis direction. The slider 160 is in vertical movable engagement with a rail 159 held on to the frame 148 is fixed, and also extends in the Y-axis direction.

A shaft 162 which extends in the X1 direction stands from an X1 direction side of the hand 146 before, as in 9 shown. link 164 in side view according to 10A has a curved shape is near the side of the hand 146 arranged. The connecting link 164 is on a hinge pin 166 hinged, that of the frame 148 protrudes and into a through hole in an approximately central bend of the connecting member 164 used. The connecting link 164 contains a slot at its end 168 that the shaft 162 picks up from the side of the hand 146 protrudes. A pen 170 is in the X1 direction from the opposite end of the link 164 in front. The pencil 170 is in a through hole of a lever 175 stored at the outer end of a pole 174 attached is that of a cylinder mechanism 172 is reciprocating in the Z-directions. An attack 176 is at the back of the bend of the link 164 attached, which points in the Z2 direction, and stands with a stop pin 178 engaged by the frame 148 protrudes.

If the cylinder mechanism 172 is activated to the lever 175 moving in the Z2 direction pivots the link 164 around the hinge pin 166 so that the shaft 162 inside the slot 168 moved vertically in the Y-directions to thereby hold the hand 146 to move in the Y-directions while the slider 160 along the rail 159 emotional. In particular, if the rod 174 in the Z1 direction, as in 10A shown pivots the link 164 to the top, thereby the hand 146 in the Y1 direction. If the rod 174 in the Z2 direction, from the in 10A shown position, retracts, the link 164 pivoted in the direction shown by the arrow θ downwards, as in 10B shown thereby to the hand 146 lower in the Y2 direction. The upper and lower limit positions (positions in the Y-directions) of the shaft 162 and therefore the hand 164 be achieved when the link 164 pivots are used by sensors (proximity sensors) 179a . 179b detected, which are attached to the respective upper and lower limit positions. The hand 146 reaches its upper limit position when the stop 176 and the stopper bolt 178 to strike each other, whereas the hand 146 reaches its lower limit position when the rod 174 from the cylinder mechanism 172 is completely retracted.

The tool transfer mechanism 140 is arranged in such a position that when the hand 146 in the Y1 direction in the upper limit position is the top (the slider 158a ) of the lower plate 158 the hand 146 with the rail 114 is substantially aligned, and the frame 148 hangs firmly from the bottom of the base frame 110 pointing in the Y2 direction (see 3 . 6 . 8th and 10A ). If no tool T is to be transferred, as in 8th shown, the hand remains 146 in the upper limit position in the Y1 direction, so that the tool holders 126 (the tools T) from the chain 112 smooth between the top plate 156 and the lower plate 158 move in the X directions. In other words, the lower plates 158 (the sliding elements 158a ) are complementary within the wells 134a . 134b arranged and act as part of the rail 114 ,

The machine tool system 10 The first embodiment is basically constructed as described above. The following is a process for transferring a tool T between the main magazine 80a and the help magazine 100 in terms of the 11A to 21C described. The process of transferring a tool T between the other main magazine 80b and the help magazine 100 is essentially identical and will not be described below.

The 11A to 21C show different states of the process, the transfer of a tool T between the main magazine 80b and the help magazine 100 is used. 11A is a plan view of a portion of the tool magazine 11 near the depression 134a . 11B is a front view of the section of the tool magazine 11 near the in 11A shown depression 134a , and 11C is a side view of the section of the tool magazine 11 near the in 11A shown depression 134a , The 12A to 21C are also views corresponding to the views of the 11A to 11C are similar.

For ease of understanding of the invention show the 11A to 21c Components more schematic than in the 1 to 10B , Although z. B. the cylinder mechanism 172 the tool transfer mechanism 140 in 10A is shown in horizontal orientation, where its axes extend in the Z-axis direction is in 11C the cylinder mechanism 172 in the vertical orientation, where its axis extends in the Y-axis direction, thereby the functions of the cylinder mechanism 172 clarify. In the 11A to 21C are the tool holders 126 that from the auxiliary magazine 100 be held for ease of understanding additionally denoted by the letters A to D. Below are the tool holders 126 as tool holders 126A to 126D designated. In 11C and the other similar figures, the hatched area indicates a machining area in which the workpiece W is moved from the main spindle 36 is processed. The machining area is from the area of the tool magazine 100 with a plate 15b separated (see 1 ). The plate 15b prevents chips and machining oil from the machining area into the tool magazine 11 penetrates.

Hereinafter, a sequence of outputting (canceling) a non-desired tool T (a tool T to be replaced) from the main magazine will be described 80a to the help magazine 100 in terms of the 11A to 17C described. In this case, suppose that the retaining arms 84 of the main magazine 80a hold all the respective tools T, and that the tool magazine 126 that of at least one of the support arms 118 of the auxiliary magazine 100 is held, is empty, ie no tool T carries. The tools T on the main magazine 80a and the help magazine 100 carry respective identification addresses, not shown, which make it possible for the main magazine 80a and the help magazine 100 under the control of the controller 12 be quickly indexed to any desired tool T.

As in the 11A to 11C shown, becomes the main magazine 80a so turned that section of it, which is free of the holding arms 84 is and which extends in an angular range of about 90 °, since the other of the angular range of about 270 °, in which the retaining arms 84 are arranged at angular distance, in the Y1 direction under the recess 134a is oriented upward. At the same time the chain 112 of the auxiliary magazine 100 revolving around the empty tool holder 126b in which no tool T is present, with the recess 134a to index in alignment. Accordingly, the empty tool holder 126b in the hand 146 the tool transfer mechanism 140 arranged, ie between the upper plate 156 and the lower plate 158 ,

In 11C serve the sensors (proximity sensors) 180 . 182 . 184 to recognize if a tool T is present or not. In particular, the sensor detects 180 when a desired tool T from the auxiliary magazine 100 to one with the depression 134a aligned position has been indexed, and also recognizes when the auxiliary magazine 100 a desired tool T from the main magazine 80a receives. The sensor 182 detects when a desired tool T from the main magazine 80a to one with the depression 134a aligned position has been indexed. The sensor 184 detects when a desired tool T to one with the main spindle 36 aligned indexing position has been indexed (see 5 and 6 ) and also recognizes when one is at the main spindle 36 attached tool T from the corresponding support arm 84 is solved.

Then, as in the 12A to 12C shown the cylinder mechanism 172 the tool transfer mechanism 140 activated to the hand 146 lower. The tool holder 126b between the top plate 156 and the lower plate 158 is held down in the Y2 direction while being lowered from the fork 116 smoothly led into the slots 130 intervenes, and then grab your fingers 142 in the slots 132 one.

As in the 12B and 12C shown is the empty tool holder 126B through the depression 134a through and out of the support arm 118 completely dissolved until the tool holder 126B from the hand 146 and the engagement element 114 the tool transfer mechanism 140 is held.

Then, as in the 13A to 13C shown the cylinder mechanism 150 the tool transfer mechanism 140 activated to the engaging element 144 retract in the Z2 direction while the fingers 142 in the slots 132 the tool holder 1268 engage to thereby the tool holder 126B withdraw.

In 13C In order to facilitate the understanding of the invention, the tool holder 126B so shown to be together with your hand 146 from the cylinder mechanism 150 retracted. In reality, however, in the present embodiment, as is 10B obvious, the hand 146 not displaced in the Z direction, but the U-shaped engagement element 144 is displaced in the Z-axis direction to thereby the in the tool holder 126B in the hand 146 to retract smoothly. Since the sliding elements 156a . 156b made of a similar material as the rail 114 are made on the top plate 156 and the lower plate 158 the hand 146 are attached, the sliding elements 156a . 156b the tool holder 126B move smoothly. Of course, the cylinder mechanism 150 the hand 146 also together with the engagement element 144 move.

Then, as in the 14A to 14C shown the main magazine 80a turned to the holding arm 84 holding the tool T to be replaced in alignment with the recess 134a and the tool transfer mechanism 140 to index. Here is, as from the 14A to 14C can be seen, the tool to be replaced T in coaxial alignment with the empty tool holder 126B held. Point here, as in 14B shown the openings of the handle 85 of the support arm 84 of the main magazine 80a and the opening of the fork 116 of the support arm 118 of the auxiliary magazine 100 within the vertical plane in the Y-directions vertically toward each other.

Then, as in the 15A to 15C shown the cylinder mechanism 150 activated to the engaging element 144 to move forward in the Z1 direction to thereby receive the tool holder 126B move forward with it together. The replacement tool T is easily and safely in the tool holder 126B used, which is held in coaxial alignment with the tool T.

Then, as in the 16A to 16C shown the cylinder mechanism 172 activated to the hand 146 to raise. The tool holder 1268 whose tops and bottoms are from the hand 146 are held, and the replacement tool T, in the tool holder 1268 attached, are lifted smoothly in the Y1 direction, while being away from the fingers 142 be guided in the slots 142 intervene, as well as through the fork 116 in the slots 130 intervenes.

As in 16C is shown, the distance YC in the vertical direction, ie, the Y-axis direction, between the outer end of the fork 116 , ie their lower end in the Y2 direction, the holding arm 118 of the auxiliary magazine 100 , and the outer end of the fingers 142 ie the upper end in the Y1 direction of the engagement element 144 the tool transfer mechanism 140 , smaller than the length of the slots 130 . 132 in the vertical direction, that is, in the Y-axis direction. Therefore, while the tool holder remains 126 from the hand 146 is raised or lowered, at least one of the forks 116 and the finger 142 always engaged in the slots 130 . 132 , As a result, the hand can 146 the tool holder 126 Move vertically stably by simply holding the top and bottom sides of it. The hand 146 can also use the empty tool holder 126 move vertically stable by holding their top and bottom sides while holding the empty tool holder 126 is spent as in the 11A to 12C shown.

With the thus constructed tool transfer mechanism 140 needs the hand 146 no element for holding the left and right side surfaces of the tool holder 126 , If no tool T is to be transferred, serve the hands 146 in the respective wells 134a . 134b are arranged as parts of the rail 114 , When the holding arm 118 and the arm 84 in a position for transferring the tool T (the tool holder 126 ) are arranged as in 16C shown, lies the outer end of the gripper 85 ie the upper end in the Y1 direction of the support arm 84 , in the Essentially at the same height as the outer end of the fingers 142 , Therefore, the tool T as well as the tool holder 126 be guided smoothly.

Once lifting the tool holder 126 and the tool T is completed, as in the 17A to 17C shown is the tool holder 1268 with the tool T mounted therein from the support arm 118 of the auxiliary magazine 100 held. Therefore, by means of the empty tool holder 1268 , the tool magazine 11 capable of the tool T from the main magazine 80a to the help magazine 100 to convict.

Hereinafter, a sequence of outputting (feeding) a desired tool T from the auxiliary magazine will be described 100 to the empty holding arm 84 of the main magazine 80a from which an unwanted tool T has been removed with respect to 18A to 21C described.

As in the 18A to 18C shown is the help magazine 100 activated to a tool holder 126C with a desired tool T mounted therein, to index to a position coincident with the indentation 134a flees. In other words, the tool holder 126C with the desired tool T mounted thereon becomes in the hand 146 the tool transfer mechanism 140 arranged. The in the 18A to 18C the stage shown follows in the 17A to 17C shown stage. Therefore, in this case, the empty holding arm 84 of the main magazine 80a previously placed in the transfer position and aligned with the recess 134a , However, even the main magazine could 80a be activated to the empty holding arm 84 to index to the transfer position, if necessary.

Then, as in the 19A to 19C shown the cylinder mechanism 172 activated to the hand 146 lower. The tool holder 126C (with the desired tool T mounted therein), their tops and bottoms by hand 146 being held down in the Y2 direction while moving from the into the slots 130 engaging fork 116 and then into the slots 132 engaging fingers 142 guided smoothly.

When lowering the tool holder 126 and the tool T has been completed, as in the 20A to 20C shown is the tool holder 126C with the tool T mounted therein from the support arm 118 completely solved and is by the engagement element 144 kept that in the slots 132 intervenes. The desired tool T, which is in the tool holder 126C attached is by the gripper 85 of the support arm 84 of the main magazine 80a held.

Then, as in the 21A to 21C shown the cylinder mechanism 150 activated to the engaging element 144 retract in the Z2 direction and thereby the tool holder 126C withdraw. That of the arm 84 held tool T is taken from the tool holder 126C solved, whereupon the tool holder 126C is retracted in the Z2 direction, thereby the transfer of the desired tool T to the main magazine 80a complete.

The following operations are substantially the same as described above. The empty tool holder 126C from which the tool T has been released becomes the auxiliary magazine 100 returned, and, if necessary, another tool T to the main magazine 80a be replaced.

According to the present embodiment, as described above, a tool T between the main magazine 80a ( 80b ) and the help magazine 100 to convict, the openings of the gripper 85 of the support arm 84 and the fork 116 of the support arm 118 arranged in the vertical YZ plane opposite each other, with the recess 134a ( 134b ) in between (see 22 ). The tool transfer mechanism 140 will also be in alignment with the recess 134a ( 134b ) arranged. At the help magazine 100 the tool T is taken from the tool holder 126 held, which serves as a mobile recording. At the main magazine 80a ( 80b ), the tool T is directly from the support arm 84 held without the tool holder 126 is required.

Consequently, the tool T between the main magazine 80a ( 80b ) and the help magazine 100 be easily transferred when the tool holder 126 from the tool transfer mechanism 140 is moved vertically (see eg 18A to 20C ). For example, the action is to drag the tool holder 126 (of the tool T) from the holding arm 84 of the auxiliary magazine 100 also at the same time an action for attaching (insert) the tool T in the holding arm 84 of the main magazine 80a ( 80b ). The tool T can thus be transferred essentially in a linear action. Therefore, the tool transfer mechanism 140 able to quickly and reliably transfer the tools T with a single action, compared to the three actions of pulling, turning and inserting the tool in the conventional design.

Because in particular the rail 114 of the auxiliary magazine 100 the wells 134a . 134b contains can the tool T, which is along the rail 114 is mobile, directly to and from the main magazine 80a . 80b through the depressions 134a . 134b be transferred through it, without causing it by a Dreaction of the rail 114 has to be moved. Since there is no rotation action during the transfer of the tool T, the tool T is prevented from being displaced or displaced positionally, and therefore the tool T can be stably transferred without any transfer errors taking place.

In particular, the tool transfer mechanism includes 140 for transferring tools T the hand 146 as the first moving element for moving the tool holder 126 in the transfer direction of the tool T (Y-directions) and in the recess 134a ( 134b ) is positionable, complementary to the rail 114 , as well as the engagement element 144 as the second moving element for moving the tool holder 126 in Anbringe- and loosening directions of the tools T from the tool holder 126 (Z directions). Therefore, the tool transfer mechanism 140 transfer the tools T based on linear movements. Because the tool transfer mechanism 140 No mechanism required to rotate the tool T is the structure of the tool transfer mechanism 140 simple and therefore it is reliable and durable.

The main magazines 80a . 80b only need to store those tools T required for machining the workpiece W while the auxiliary magazine 100 can store other tools T, which are not currently required for machining the workpiece W. As a result, the main magazines 80a . 80b have a minimum size sufficient to hold only those tools T to be used on the workpiece W. Because the number of tools T, which in the main magazines 80a . 80b are kept to a minimum, the rate at which the tools T from the main magazines 80a . 80b be increased, thereby shortening the time it takes to put the tools between the main magazines 80a . 80b and the main spindle 36 to change automatically.

The tools T can automatically and quickly between the main magazines 80a . 80b and the help magazine 100 be replaced. Therefore, even if workpieces of a given product type belonging to a batch currently being manufactured are machined with the tools, a variety of other tools which may be used on workpieces of another product type belonging to the next batch to be produced may be used, successively between the main magazines 80a . 80b and the help magazine 100 change.

22 schematically shows the layout of center axes and operating centers of various elements of the machine tool system 10 of the present embodiment.

As in 22 shown has the machine tool system 10 a turning center C1 about which the turning arm 32 for turning the main spindle 36 is rotated, C2 rotary centers, around which the main magazines 80a . 80b are rotatable, an operating center C of the tool transfer mechanism 140 , as well as a middle position C4 of the depression 134a ( 134b ) in the rail 114 , The rotational center C1, the rotational centers C2, the center of operation C3 and the center position C4 are aligned with each other in a common vertical YZ plane.

In particular, the rotational center C1 serves as an axis about which the pivot arm 32 swiveling and the main spindle 36 is rotatable. That is, the axis of the rotary shaft of the spindle motor 38 as well as the swivel arm 32 become in the Y-axis and Z-axis directions within the vertical YZ plane of the support body 22 and the pillar 18 emotional. The rotational centers C2 serve as axes around which the main magazines 80a . 80b are rotatable around. The position where the tool T between the arm 84 and the main spindle 36 is transferred, and the position where the tool T between the support arm 84 and the tool transfer mechanism 140 are also arranged in the vertical YZ plane. The plant center C3 serves as a transversal center of the hand 146 of the engagement element 144 , and the hand 146 and the engagement element 144 are moved in the Y and Z axis directions within the vertical YZ plane. The center position C4 serves as the transverse center of the depression 134a ( 134b ). The position where the tool T between the arm 118 and the tool transfer mechanism 140 through the depression 134a ( 134b ) is also located in the vertical YZ plane.

Therefore, the machine tool system has 10 essentially no elements that are movable in its transverse directions (X-directions), but includes elements, center axes and operating centers and operating directions that lie in the vertical XY plane. The machine tool system 10 thus effectively avoids lateral wobble and vibration in the X-axis direction and prevents noise from being generated by these wobble and vibration movements. If a tool T between the auxiliary magazine 100 and the main magazine 80a is transferred while from the main spindle 36 a workpiece W is machined, the workpiece W can still with high precision be edited as the main spindle 36 no lateral shaking or vibration is exposed. The machine tool system 10 generates movements in the X-axis direction to appropriately process the desired portions of the workpiece W when the swing arm 32 the main spindle 36 swings.

Further, in the present embodiment, the auxiliary magazine 100 above and behind the main magazines 80a . 80b arranged so that it is across the main magazines 80a . 80b is arranged. In comparison to an arrangement wherein the auxiliary magazine 100 side of the main magazines 80a . 80b is arranged, the so-arranged auxiliary magazine 100 storing a very large number of tools without increasing the pitch in the X-axis direction of the machine tool system 10 narrow. Since all movements of the elements for transferring the tool T are made within the vertical XZ plane as described above, the machine tool system is effectively prevented 10 , which is a rather vertically elongated structure including the auxiliary magazine 100 in its upper portion, while the transfer of the tool T in the X-axis direction shakes laterally and vibrates. In other words, although the machine tool system 10 including the auxiliary magazine 100 at its upper portion tends to have a high center of gravity, since the movements of the elements for transferring the tool T are within the vertical YZ plane, as in 22 shown effectively prevents the machine tool system 10 vibrates laterally in the X-axis direction and vibrates. As a result, the machine tool system remains 10 overall stable.

The machine tool system 10 may also have a single main magazine for transferring the tools T to and from the auxiliary magazine 100 and a single machine tool associated with such a single main magazine. The machine tool system 10 may also include a transfer machine containing three or more main magazines to tools T to and from the auxiliary magazine 100 and three or more corresponding machine tools each associated with such main magazines.

In the above embodiment, the tools T are vertical between the main magazines 80a . 80b and the help magazine 100 transferred. Under certain circumstances, however, the auxiliary magazine 100 also on the side of the main magazines 80a . 80b be arranged. In this case, the tool transfer mechanism 140 Activated in the horizontal plane to move the tools T horizontally between the auxiliary magazine 100 and the main magazines 80a . 80b to convict. When the machine tool system 10 contains a single main magazine and a single machine tool, then can, as on both sides of the main magazine space arises, the machine tool system 10 easy to apply in practice.

Hereinafter, a second embodiment of the invention will be described.

23 is a partially cut away perspective view of a machine tool system 101 , which includes a tool damage detection device according to the second embodiment of the invention. Those components of the machine tool system 101 In structure, function and advantage to those of the machine tool system 10 are identical with the first embodiment, are denoted by identical reference numerals, and these components will not be described in detail below.

As in 23 shown contains the machine tool system 101 the help magazine 100 of in 1 shown machine tool system 10 not, and includes a tool damage detection device 200 between the two main magazines (tool magazines) 80a . 80b is arranged. The machine tool system 101 can, apart from the tool damage detection device 200 , also contain additional components that are identical to those of 1 shown machine tool system 10 are. For example, if necessary, the machine tool system 101 also the help magazine 100 contain.

As in the 23 and 24 shown, the frame bears 15 the main magazines 80a . 80b serving as tool magazines, each of which stores or holds a plurality of tools T, and the tool damage detecting device 200 which is able to simultaneously the main magazines 80a . 80b to use. The main magazines 80a . 80b and the tool damage detection device 200 are as independent units of the first machine tool 10a and the second machine tool 10b built separately, which serve as processing units, and the main magazines 80a . 80b are arranged outside the processing area where the workpiece W is processed. The main magazines 80a . 80b and the tool damage detection device 200 are with the plate 15b protected against chips and machining oil, which arise while the workpiece W is being processed.

The tool damage detection device 200 that between the two main magazines 80a and 80b is located, detects, at substantially the same time, damage to two tools T, each attached to the main magazines 80a . 80b are stored. Damage to the tools T may include breakage or wear of the cutting edges of the tools T, which may consist of drill bits or the like.

As in the 25 and 26 includes the tool damage detection device 200 a substantially W-shaped carrier 206 consisting of two substantially U-shaped tool approach devices (tool insertion elements) 202 is constructed with a movable mother 204 coupled together, a movement mechanism 210 for moving the carrier 206 along a rail extending in the Z-axis direction 208 , as well as a base element 211 that the carrier 206 and the movement mechanism 210 bears on it.

Each of the tool approach devices 202 of the carrier 206 For example, a tool T inserted therein may be sandwiched between a pair of wall elements 202a which extend in the Z-axis direction and face each other. The tool T, when placed in each of the tool approaching devices 202 is used, by means of a sensor (detector) 212 be recognized, on opposite inner wall surfaces of the wall elements 202a is appropriate. The sensor 212 includes z. B. a non-contact (photoelectric) detector with a light emitter and a light detector, each on opposite inner wall surfaces of the wall elements 202a are attached. The sensor 212 detects the tool T when the tool T interrupts a light beam emitted from the light emitter to the light detector.

The movement mechanism 210 includes a motor 214 that is attached to the base element 211 firmly attached, as well as a ball screw 216 that with the rotary shaft of the engine 214 is connected and through the movable nut 214 is screwed through. If the engine 214 is turned on, the ball screw rotates 216 around its axis, thereby the movable nut 214 and thus the wearer 206 (the tool approach devices 202 ) along the rail 208 on the base element 211 to move.

As in 26 shown is the tool damage detection device 200 arranged in alignment with a position (tool damage detection position) in which the tools T on the main magazines 80a . 80b stored and holding arms 84 are rotated, which are arranged next to each other and of a minimum distance Da between the main magazines 80a . 80b between them.

Of the tools T, which are in the machine tool system 101 are used, a tool whose axial length is the smallest is referred to as a tool TS, and a tool whose axial length is largest is referred to as a tool TL. 26 Fig. 10 is a plan view, partially omitted for illustrative purposes, of a tool damage detection device 200 , wherein the main magazine 80a the shortest tool indexed TS at the tool damage detection position while the other main magazine 80b the longest tool TL has indexed at the tool damage detection position. In this case, the distance between the axes of the shortest and longest tools TS and TL is the distance Da.

As in 26 shown is the width W1 of the sensor 212 ie, the distance between the light emitter and the light detector, or in other words, the distance W1 between the paired wall elements 202a , greater than the width W2 (diameter or width in plan view) of the tool T (TS, TL). Also, the length (depth) L1 of the tool approaching devices 202 in the axial direction thereof, that is, in the Z-axis direction, larger than the length of the longest tool TL in the axial direction. Usually the distance between the pair of wall elements 202a greater than the distance W1 between the light emitter and the light detector. Therefore, when the tool approaching devices 202 through the movement mechanism 210 to the main magazines 80a . 80b are moved, the tools T (TL, TS) in the openings of the U-shaped tool approaching devices 202 used, without these physically interfere with each other.

27 is a front partial view showing the layout of the tools T in the main magazines 80a 80b are stored, as well as the tool approaching devices (wall elements 202a ) of the tool damage detection device 200 , In 27 are for ease of understanding of the invention, the sensors 212 been omitted. Also, for ease of understanding, the distance between the pair of wall elements 202a shown as equal to the width W1.

As in 27 Shown are the turning centers around which are the main magazines 80a . 80b are rotatable, designated C2. The distances from the rotational centers C2 to the wall elements 202a that are closer to the rotational centers C2 are denoted by D1. The distances from the rotational centers C2 to the wall elements 202a that are farther away from the rotational centers C2 are denoted by D2. If the tools on the main magazines 80a . 80b are rotated, follow the outer and inner surfaces of the tools T respectively outer and inner Tracks. The inner tracks closer to the rotational centers C2 are denoted by Tr1, whereas the outer tracks further away from the rotational centers C2 are indicated by Tr2. The radii of the inner and outer webs Tr1, Tr2 around the rotational centers C2 are denoted by R1 and R2. In 27 are the distances D1, D2, for ease of understanding, shown as radii of curvature of the rotational centers C2. But in reality the wall elements 202a do not move in the Y-directions, the distances D1, D2 represent linear distances in the X-axis direction between the wall elements 202a and the rotational centers C2. In other words, the distances D1, D2 remain as X-directional distances at the opposite ends of the wall elements 202a in the vertical direction, that is, in the Y-axis direction.

As in 27 As shown, the paths Tr1, Tr2 may pass within the spaces represented by the differences between the distances D1, D2, that is, the spaces represented by the widths W1. In other words, it is preferable that the distances D1 are smaller than radii R1, R2 (D1 <R1 <R2), and that the distances D2 are larger than the radii R1, R2 (D2>R2> R1). If with these dimension settings the tool approach devices 202 the tools T are arranged closer, as in the 29A and 29B shown, rather than spaced from the tools T, as in 26 shown, the tools T and the wall elements interfere 202a (the sensors 212 ) of the tool approaching devices 202 not physically, so the main magazines 80a . 80b and the tool damage detection device 200 can work smoothly.

The length L1 of the two tool approaching devices 202 of the carrier 206 is large enough to handle the shortest and longest tools TS, TL, so the two tool approach devices 202 himself with the tools T, that of the main magazines 80a . 80b be rotated, do not physically disturb. Thus, the tool damage detection device has 200 an interference prevention structure that avoids a physical interference with all those T tools used in major magazines 80a . 80b are stored, regardless of whether the carrier 206 through the movement mechanism 210 to the main magazines 80a . 80b is moved towards or away from them.

The machine tool system 101 according to the second embodiment is basically constructed as described above. The following will be related to 28 a process for detecting the damage of a tool T associated with the tool damage detection device 200 of the machine tool system 101 is carried out. 28 FIG. 10 is a flowchart showing a damage detection sequence of the tool damage detection apparatus. FIG 200 the second embodiment.

Im in 28 shown step S1, the tools T from the holding arms 84 (grippers 85 ) of the main magazine 80a . 80b held (tool holding step). If z. B. the machine tool system 101 To start working, various tools T to be used on the workpiece W are manually or otherwise attached to the holding arms 84 the main magazine 80a . 80b arranged. Alternatively, while the machine tool system 101 a workpiece W processed, the column 18 and the support body 22 activated to a used or unwanted tool T from the main spindle 36 to the support arm 84 to convict. Therefore, step S1 also serves as a tool storage step for storing a number of tools T on the main magazines 80a . 80b , which is independent of the first machine tool 10a and the second machine tool 10b are such that any of the stored tools T can be indexed to a desired position.

As in the 26 and 27 shown contains the tool damage detection device 200 the above-discussed interference prevention structure to avoid physical interference with the tools T contained in the main magazines 80a . 80b are stored. If the tools T in the main magazines 80a . 80b held and stored, due to the position in the X-axis direction, no problem arises to which the carrier 206 (the tool approach devices 202 ) from the drive mechanism 210 is moved. However, in the following description, assume that step S1 is executed while the carrier 206 is closest to the tools T in the Z2 direction, as in 29A shown.

In step S2, the main magazines 80a . 80b under the control of the controller 12 rotated to index the tools T to be inspected for damage to the tool damage detection position (see 26 and 27 ). In particular, two of those in the main magazines 80a . 80b stored tools T indexed to a position where the two tools T are closest to each other and are arranged with the minimum distance Da from each other. The two tools T to be inspected are then respectively inserted into the tool approaching devices 202 introduced, which have been shifted in the Z2 direction (see 29A ).

The main magazines 80a . 80b can the desired tools T under the control of the controller 12 index quickly and easily, based on the identification addresses (not shown) attached to the tools T and visible. In other words, the controller 12 stores information related to the axial lengths of the tools T indexed to the tool damage detection position when the tools T are normal, ie, when the tools T are not damaged.

In step S3, the tool damage detection device becomes 200 is activated to check for damage to the tools T that have been indexed to the tool damage detection position. In particular, the drive mechanism 210 activated to the tool approach devices 202 in the Z1 direction from the in 29A shown position to the in 29B retract shown position. In the 29A and 29B is the cutting edge of the tool TS, which is on the main magazine 80a is stored, aborted, as indicated by the broken lines.

The sensors 212 are on the wall elements 202a attached to positions to detect the end tip (the cutting edge) of the shortest tool TS and the tip end (cutting edge) of the longest tool TL when the tool approaching devices 202 from the in 29A shown position, which is closest to the tools T, to the in 29B shown position, which is furthest away from the tools T, are offset. While the tool approach devices 202 through the drive mechanism 210 along the tools T and from the main magazines 80a . 80b are retracted away, therefore, in step S3, the sensors 212 any damage to the tools T easily recognize the ones on the main magazines 80a . 80b are stored and have different lengths ranging from the smallest length to the largest length. Instead of the carrier 206 from the main magazines 80a . 80b can relocate when the sensors 212 to detect damage to the tools T, the wearer also from the in 29B shown position to the in 29A be shown shifted position.

In particular, if in step S3 the carrier 206 A linear sensor (not shown) detects the distance that the tool approaching devices are moving 202 (the sensors ( 212 ), the position closest to the tools T or the position furthest from the tools T. The inner ends of the tools T, which have been indexed to the respective tool damage detection positions, are held at constant positions in the Z-axis direction.

Based on the detected distance around which the tool approaching devices 202 (the sensors 212 ), along with the information of the axial lengths of the tools T, which are considered normal and those indexed to the tool damage detection positions, the controller determines in step S4 12 Whether or not the detected end tips (cutting edges) of the tools T are located within a normal damage-free position range. When the sensors 212 according to 29A are positioned, the cutting edges of the tools T recognize z. B. the cutting edge of the tool TL with the solid lines in 29A , then evaluates the controller that the tools T are damage-free. On the other hand, if the sensors 212 the cutting edges of the tools do not recognize T, z. B. the damaged cutting edge of the tool TS with the broken lines in 29A , then evaluates the controller 12 that the tools T are damaged.

If the tools T are judged to be free of damage in step S4, then, since the tools are normal, the control returns to step S1, and the tool damage detection process is repeated on the next tools T. When in step 54 at least one of the tools T is considered damaged, then the controller switches 12 a speaker, lamp, or other indicator not shown in step 55 to issue a warning. Therefore, the operator is quickly notified of a damaged tool T and may take appropriate actions to replace or service these damaged tools T. While the operator is replacing or servicing a damaged tool T, the machine tool system could 202 be switched off. If, as an alternative, it is not to be expected that the damaged tool T will be used on the currently machined workpiece W, then the machine tool system will be needed 202 are not turned off, and the workpiece W can be processed continuously. At the same time, the controller 12 perform a control process to prevent the damaged tool T at the main spindle 36 is attached until the damaged tool T has been replaced by a normal tool T. The controller may then return to step S1 so that other tools T may be inspected for damage.

It is not absolutely necessary that step S1 be executed. If tools T, already in the main magazines 80a . 80b are held and stored repeatedly over several days, wherein the above tool damage detection process is performed as a daily inspection process before the machine tool system 101 At the beginning of each day, then step S1 can be omitted, and the existing tools T, located at the main magazines 80a . 80b can be successively inspected for damage according to the tool damage detection process beginning with step S2.

As described above, the tool damage detection device includes 200 the pair of tool approaching devices 202 for simultaneous treatment of the two main magazines 80a . 80b , The tool damage detection device 200 detects damage to the tools T by movement of the carrier 206 , the tool proximity devices 202 holds, to the main magazines 80a . 80b in the axial direction of the tools T out or away. In particular, the tool damage detection device recognizes 200 damage to the tools T on the main magazines 80a . 80b that store the tools T, rather than at the processing units that work the workpieces W, such as the first machine tool 10a and the second machine tool 10b ,

Therefore, the tool damage detection device 200 detect damage to tools T, which are used to machine the workpieces W on the main spindle 36 and then to the main magazines 80a . 80b while the workpieces W are being processed with other tools T. If damage is detected on at least one of the inspected tools T, then the tool T can be rapidly moved by another tool T from the main magazine 80a or 80b be replaced. If it is not planned for a longer period of time that the damaged tool T is processing a workpiece, then the damaged tool T may remain and may be driven as needed so as not to be on the main spindle 36 is attached.

Every time a tool T is attached to the main spindle 36 is arranged for machining a workpiece W, the tool T is checked for damage, and it is effectively prevented from being used for machining the workpiece W when the tool T has been found to be damaged. Since the workpieces W can be continuously processed by the processing units, while the tools T on the main magazines 80a . 80b be checked for damage needs the machine tool system 101 not to be shut down if damage is detected on the tools T to be tested. Consequently, the cycle time of the machine tool system 101 can be shortened, and accordingly, the production efficiency can be improved.

The tool damage detection device 200 is in association with the main magazines 80a . 80b arranged outside the processing area where the workpieces W are processed. Therefore, it prevents the sensors 212 due to chips and machining oil malfunction, which arise when the workpieces W are processed. At the same time it also prevents the drive mechanism 210 is affected by these chips and machining oil. Accordingly, the drive mechanism 210 the movement of the wearer 206 accurately control, and therefore the tool damage detection device 200 Accurately detect damage to tools T.

The tool damage detection device 200 includes a disturbance prevention structure, as explained above, for simultaneously avoiding physical interference with the shortest and longest tools TS, TL of all the tools T in the machine tool system 101 be used (see 26 and 27 ). Since the tool damage detection device 200 is able to simultaneously detect damage to tools T of different types is the tool damage detection device 200 especially versatile. While also on one of the main magazines 80a stored tools T from the damage detection device 200 Inspected for damage, other tools T between the other main magazine 80b and the main spindle 36 be changed automatically. Thus, the tool damage detection device 200 Avoid system shutdowns due to detection of damaged tools, causing the machine tool system 100 gets a better production efficiency.

The tool damage detection device 200 is located at a position (tool damage detection position) where two tools T are attached to the main magazines 80a . 80b stored and from the retaining arms 84 be pivoted, each other next to each other and thereby have the distance Da from each other (see 26 and 27 ). Therefore, the dimension of the carrier 206 , the tool proximity devices 202 carries, be small, and can also measure the size of the drive mechanism 210 for moving the carrier 206 be small sized and get along with low power requirement. As a result, the size and weight of the tool damage detection device 200 be small and it can be installed with high degree of freedom.

The tool approaching devices of the tool damage detecting device may also have shapes other than the U-shape. 30 shows in perspective a tool damage detection device 200a according to a first modification. As in 30 shown contains the tool damage detection device 200 the first modification a carrier 207 with a straight tool approaching device 203 holding a pair of wall elements 202a characterized by a movable nut 204 connected to each other. The tool approaching device 203 also contains a pair of sensors (detectors) 218 for detecting damage to the tools T. Each of the sensors 218 can z. B. comprise a contactless proximity sensor, which forms a device with a single element. Therefore, the tool damage detection device is 200 small and light and can be easily constructed because the straight tool approaching device thus constructed 200 requires fewer elements and is also designed to allow for interference prevention.

31 shows in plan view a tool damage detection device 200b according to a second modification. The tool damage detection device 200b contains a pair of contact sensors 220 who recognize the tools T. Each of the sensors 220 includes a proximity sensor for detecting a tool T when an elastic contact 220a skewed as a result of coming into contact with the tool T.

Each of the machine tool system described above 10 . 110 has two main magazines. However, the machine tool systems could also include three or more main magazines. 32 shows in front view of a machine tool system according to a third modification, the two main magazines 80a . 80b together with another main magazine 80c which has a reverse orientation and above the main magazines 80a . 80b is arranged. The machine tool system can also be the main magazine 80c associated tool damage detection device 200c included, in integral combination with or separate from the main magazines 80a . 80b associated tool damage detection device 200 , 33 shows a front view of a machine tool system according to a fourth modification, which is a linear array of three main magazines 80a . 80b . 80c contains. The machine tool system also includes two tool damage detection devices 200 which may be integrally combined or separated from each other, and three tool damage detection devices 200c that integrally combine with each other or from the tool damage detection device 200 can be separated. If three or more main magazines are provided, then one of the tool damage detection devices may be attached to a tool damage detection position where the respective tools T of two of the main magazines are closest to each other (FIG. 26 and 27 ).

The tool proximity devices shown above have a U-shape or a straight shape. However, a tool proximity device may also be rod-shaped or tubular, so that sensors may be installed thereto to detect damage to tools T. If a tubular tool approaching device is used, then a tool T must be removed from the tubular approaching device as its associated main magazines are rotated. Three or more tool proximity devices may be mounted on a common carrier to simultaneously inspect three or more tools stored in a single main magazine.

Instead of the illustrated ball screw mechanism, the drive mechanism of the tool damage detection device may also include a linear mechanism, a pivot lever mechanism, a rack and pinion mechanism or the like to move the carrier including the tool approaching devices toward and away from the main magazines.

The processing unit may comprise a single machine tool, and the single machine tool may be associated with two main magazines.

A tool magazine 11 contains main magazines 80a . 80b for holding a plurality of tools T attached to a main spindle 36 for machining a workpiece W are detachably attachable, an auxiliary magazine 100 for holding and transferring tools T to and from the main magazines 80a . 80b , as well as a tool transfer mechanism 140 for transferring the tools T between the main magazines 80a . 80b and the help magazine 100 , The help magazine 100 contains a plurality of tool holders 126 for releasably carrying the tools T, a rail 114 in sliding engagement with outer surfaces of the tool holders 126 , a chain 112 to move the tool holders 126 in sliding engagement with the rail 114 , as well as a motor 120 to activate the chain 112 , The rail 114 contains a recess 134a . 134b in alignment with the tool transfer mechanism 140 so the tools T from the tool transfer mechanism 120 be transferred through the depression.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 2007-125642 A [0003, 0006]
• JP 3369712 B [0005, 0009]

Claims (15)

Tool magazine, comprising: a first tool magazine ( 80a . 80b ) for holding a plurality of tools (T) attached to a main spindle ( 36 ) are removably attachable for machining a workpiece (W); a second tool magazine ( 100 ) for holding a plurality of tools (T) and transferring tools (T) to and from the first tool magazine ( 80a . 80b ); and a tool transfer mechanism ( 140 ) for transferring tools (T) between the first tool magazine ( 80a . 80b ) and the second tool magazine ( 100 ); the second tool magazine ( 100 ) comprises: a plurality of tool holders ( 126 ) for releasably holding the tools (T) therein; a rail ( 114 ) in sliding engagement with outer surfaces of the tool holders ( 126 ); a movement mechanism ( 112 ) for moving the tool holders ( 126 ) in sliding engagement with the rail ( 114 ); and a drive source ( 120 ) for activating the movement mechanism ( 112 ); being in the rail ( 114 ) a recess ( 134a . 134b ) in alignment with the tool transfer mechanism ( 140 ) is defined so that the tool transfer mechanism ( 140 ) transferred tools (T) through the depression ( 134a . 134b ) go through. Tool magazine according to claim 1, wherein the tool transfer mechanism ( 140 ) the tools (T) together with the tool holders ( 126 ) to and from the second tool magazine ( 100 ) and the tools (T) to and from the first tool magazine ( 80a . 80b ). Tool magazine according to claim 1, wherein the tool transfer mechanism ( 140 ) linearly through the depression ( 134a . 134b ) moves the tools (T) between the first tool magazine ( 80a . 80b ) and the second tool magazine ( 100 ). Tool magazine according to claim 1, wherein the first tool magazine ( 80a . 80b ) a plurality of first holders ( 85 ) for holding the tools (T), and the second tool magazine ( 100 ) a plurality of second holders ( 116 ) for holding the tool holders ( 126 ) in cooperation with the railways ( 114 ), the second holders ( 116 ) on the movement mechanism ( 112 ) and opposite the rail ( 114 ), and the first holders ( 85 ) and the second holders ( 116 ) have respective openings for holding the tools (T) therein; and wherein the first holders ( 85 ) and the second holders ( 116 ) are arranged such that when a tool (T) in a tool transfer direction between one of the first holder ( 85 ) of the first tool magazine ( 80a . 80b ) and one of the second holders ( 116 ) of the second tool magazine ( 110 ), the opening of the first holder ( 85 ) and the opening of a second holder ( 116 ), with the depression ( 134a . 134b ) face each other. Tool magazine according to claim 4, wherein the tool transfer mechanism ( 140 ) comprises: a first movement element ( 146 ) for moving the tool holders ( 126 ) in the tool transfer direction, wherein the first movement element ( 146 ) in the depression ( 134a . 134a ) complementary to the rail ( 114 ) is positionable; and a second moving element ( 144 ) for moving the tool holders ( 126 ) along a direction in which the tools (T) in the tool holders ( 126 ) are mounted and detached therefrom, wherein when one of the tool holders ( 126 ) held tool (T) between the first tool magazine ( 80a . 80b ) and the second tool magazine ( 100 ), one of the tool holders ( 126 ) by the first moving element ( 146 ) between one of the second holders ( 116 ) and the second movement element ( 144 ) is moved and the tool (T) by the movement of a tool holder ( 126 ) in one of the first holders ( 85 ) is attached and solved. A machine tool system comprising: a main spindle ( 36 ) for supporting a detachably mounted tool (T) for machining a predetermined area of a workpiece (W) in cooperation with a pivoting arm ( 32 ); a first tool magazine ( 80a . 80b ) for holding a plurality of tools (T) for detachable attachment to the main spindle ( 36 ), wherein the first tool magazine ( 80a . 80b ) is rotatable to index one of the tools (T) individually; a second tool magazine ( 100 ) for holding a plurality of tools (T) and transferring the tools (T) to and from the first tool magazine ( 80a . 80b ); and a tool transfer mechanism ( 140 ) for transferring tools (T) between the first tool magazine ( 80a . 80b ) and the second tool magazine ( 100 ), in which the main spindle ( 36 ) has a center of rotation about which the main spindle ( 36 ) is rotatable, wherein the first tool magazine ( 80a . 80b ) has a center of rotation about which the first tool magazine ( 80a . 80b ) is rotatable, and the second tool magazine ( 100 ) a tool transfer position for transferring the tools (T) to and from the tool transfer mechanism ( 140 ), and wherein the center of rotation of the main spindle ( 36 ), the center of rotation of the first tool magazine ( 80a . 80b ) and the tool transfer position are arranged substantially in the same vertical plane. Machine tool system according to claim 6, wherein the first tool magazine ( 80a . 80b ) a tool transfer position for transferring tools (T) to and from the tool transfer mechanism ( 140 ), wherein the tool transfer position of the first tool magazine ( 80a . 80b ) is arranged in the substantially same vertical plane. Machine tool system according to claim 6, wherein the tool transfer position of the second tool magazine ( 100 ) above the tool transfer position of the first tool magazine ( 80a . 80b ) is arranged. The machine tool system of claim 6, further comprising: a rotary drive source ( 38 ) for turning the on the main spindle ( 36 ) mounted tool (T), wherein the rotary drive source ( 38 ) with the center of rotation about which the swivel arm ( 32 ) is rotatable around, is coaxial. Machine tool system according to claim 6, wherein the first tool magazine ( 80a . 80b ) a plurality of first holders ( 85 ) for holding the tools (T), wherein the first holders ( 85 ) from a turning center around which the first tool magazine ( 80a . 80b ) is rotatable, extend radially outward, and the second tool magazine ( 100 ) a plurality of second holders ( 116 ) for holding the tools (T), wherein the first holders ( 85 ) and the second holders ( 116 ) have respective openings for holding the tools (T); and wherein the first holders ( 85 ) and the second holders ( 116 ) are arranged such that when a tool (T) between one of the first holder ( 85 ) of the first tool magazine ( 80a . 80b ) and one of the second holders ( 116 ) of the second tool magazine ( 100 ), the opening of the first holder ( 85 ) and the opening of a second holder ( 116 ) are opposed to each other in the substantially same vertical plane. Tool damage detection device in a machine tool system having a processing unit ( 10a . 10b ) to which a tool (T) for machining a workpiece (W) is removably mounted, and a plurality of tool magazines ( 80a . 80b ) for storing a plurality of tools (T) and for transferring the tools (T) to and from the processing unit ( 10a . 10b ), wherein the tool magazines ( 80a . 80b ) are rotatable to index the tools (T), the tool damage detection apparatus comprising: a support ( 206 ) with a plurality of tool approach elements ( 202 ) for simultaneously approaching at least one of the respective in the tool magazines ( 80a . 80b stored tools (T); a plurality of non-contact or contact-type detectors ( 212 ), each at the tool approach elements ( 202 ) are mounted to detect damage to the tools (T); and a movement mechanism ( 210 ) for moving the carrier ( 206 ) in the axial direction of the tools (T). A tool damage detection apparatus according to claim 11, wherein said tool approaching elements ( 202 ) have a structure around the tool approach elements ( 202 ) except for physical interference with tools (T) having the smallest and largest axial lengths of the tools (T) attached to the tool magazines (T). 80a . 80b ) are stored when the tool approach elements ( 202 ) by the movement mechanism ( 210 ) are held in a position closest to the tools (T). A tool damage detection apparatus according to claim 12, wherein the detectors ( 212 ) in respective positions for detecting damage to the tools (T) having the smallest and largest axial lengths of the tools (T) attached to the tool magazines (T); 80a . 80b ) are fixed when the tool approaching elements ( 202 ) by the movement mechanism ( 210 ) are moved from the position closest to the tools (T) to a position farthest from the tools (T). A tool damage detection apparatus according to claim 11, wherein said tool approaching elements ( 202 ) have a structure to, upon rotation of the tool magazines ( 80a . 80b ), the tool approach elements ( 202 ) except physical interference with the tools (T) attached to the tool magazines ( 80a . 80b ) are stored when the tool approach elements ( 202 ) by the movement mechanism ( 210 ) are held in a position closest to the tools (T). A tool damage detection apparatus according to claim 11, wherein said tool approaching elements ( 202 ) are arranged in a position for handling tools (T), which at at least two of the tool magazines ( 80a . 80b ) are stored, if, upon rotation of the at least two tool magazines ( 80a . 80b ), the tools (T) are indexed to nearest positions (Da).

Images