JPH0295532A - Automatic tool exchange device - Google Patents

Abstract

PURPOSE:To conduct with efficiency the automatic exchange of tool holders to a plurality of working stations by means of one magazine support body, by providing turnably an exchange arm which conducts the delivery of a tool holder between a tool magazine and the spindle head of each working station, at the arm support stand of a magazine support stand. CONSTITUTION:Under the condition of a magazine support body 7 having been made to stop at a position confronting one spindle head 14, a tool holder 18 which has been furnished at the spindle head, is housed in a tool magazine by means of a combination of the reciprocal turning of an exchange arm 19, the advance/retreat action of an arm support stand 17 and the advance/retreat action of the spindle head. In addition, another tool holder selected from the tool magazine 10, is furnished at the spindle head. And after an exchange work is done, the magazine support body is moved to a position confronting another spindle head, and a similar tool exchange work to the spindle head is done. Then, the magazine support body is moved to the next working station, too, and a similar tool exchange work is conducted.

Description

[Detailed description of the invention] [Purpose of the invention]

(Industrial Application Field) The present invention relates to an automatic tool changer used in a transfer machine to change tools at a plurality of processing stations. (Conventional technology) For example, a transfer machine that processes cylinder holes in engine cylinder blocks has multiple processing stations such as rough processing, finishing processing, and measurement along the processing line, and processes the workpieces while feeding them sequentially. It looks like this. Conventionally, in this type of transfer machine. In order to deal with changes in the machined hole, ie, the inner diameter of the cylinder, etc., tools were mainly replaced manually. In addition, each machining station is provided with a magazine for tools and a tool exchange device for transferring tools between the magazine and the spindle head, thereby automating the tool exchange operation. (Problem to be Solved by the Invention) However, in the above-mentioned method in which the tool is replaced manually, the work including correcting the tip protrusion amount is complicated, the replacement time is long, and there are problems in the work. There were also risks. On the other hand, if a magazine and a changing device are provided for each processing station, the entire device at each processing station becomes complicated, large and expensive, and the magazine and changing device are required for each processing station. There are also problems such as the need for space for operation, which increases the overall space occupied, and it has been a challenge to solve these problems. (Purpose of the Invention) The present invention has been made to solve these conventional problems, and has an automatic exchange function for tool holders (including tools), and also simplifies the entire device and occupies less space. It is an object of the present invention to provide an automatic tool changer that can realize savings, etc., and can also determine whether the tool holder is attached to the spindle head or not and automatically correct the chip protrusion amount in the tool holder. The purpose is

[Structure of the invention]

(Means for Solving the Problems) An automatic tool changer according to the present invention has the following features in claim 1:
A magazine support is provided that is movable along a machining line consisting of a plurality of machining stations, and a tool magazine that is indexed and rotated about a horizontal axis substantially perpendicular to the machining line is attached to the magazine support, and a tool magazine is attached to the machining line. The apparatus is equipped with an arm support base that can move forward and backward towards the machine, and an exchange arm that transfers the tool holder between the tool magazine and the spindle head of each processing station is rotatably provided on the arm support base. . In the second aspect of the present invention, the tool holder is inserted into and removed from the tool magazine by rotating the exchange arm. Further, in a third aspect of the present invention, the arm support is provided with a displacement detection sensor whose inspection target is the outer circumferential surface of the tool holder attached to the spindle head. In a fourth aspect of the present invention, a tool holder is provided in which a rod is slidably inserted on the axis of the main body, and the rod is provided with a wedge portion that presses the chip cartridge to the outside of the main body, The correction shaft coaxially abuts the rod, and the correction shaft aligned in the axial direction!
! It is equipped with a tool correction device that adjusts the
These configurations are considered as means for solving the conventional problems. (Function of the invention) In the automatic tool changer according to the present invention, the tool magazine and the change arm are unitized independently from each processing machine side on the processing line, and the magazine support is connected to one spindle head. When stopped at the position corresponding to
Through a combination of the reciprocating rotation of the exchange arm, the forward and backward movement of the arm support, and the forward and backward movement of the spindle head, the tool holder attached to the spindle head is stored in the tool magazine. Furthermore, another tool holder selected from the tool magazine is mounted on the spindle head. After the above exchange operation, move the magazine support to a position corresponding to another spindle head, perform the same tool exchange operation on that spindle head, and then move the magazine support to the next machining station. Move your body and perform the same tool exchange work. Further, in the automatic tool changer of the present invention, after the tool holder is attached to the spindle head, the magazine support is indexed to a displacement detection position, and the tool holder is rotated at least once while the arm support remains advanced. As a result, the amount of eccentricity of the tool holder with respect to the axis of the spindle head is measured by a displacement detection sensor. By using the measurement results of the displacement detection sensor, it is possible to automatically take measures such as cleaning the interior of the tool holder and spindle head, and stopping the operation of the apparatus. That is, it is possible to eliminate run-out of the tool during rotation, improve machining accuracy, and prevent machining defects. Furthermore, the automatic tool changer of the present invention adjusts the position of the correction shaft using a driving means provided in the spindle head, and moves the rod on the tool holder side that comes into contact with the correction shaft to insert the chip through the wedge portion. For example, by using data from a measurement station included in the processing line, it is possible to automatically correct the chip protrusion amount, that is, tool correction. (Example) Hereinafter, the present invention will be explained based on the drawings. FIGS. 1 to 8 are diagrams for explaining one embodiment of the present invention, and this embodiment is illustrated as an apparatus for machining a cylinder hole in a cylinder block for an engine. As shown in FIG. 3, a machining line is formed by a plurality of machining stations, and two workpieces (cylinder blocks) are simultaneously machined at each machining station. The flow direction of the machining line is from the left side to the right side in Figure 3, and each machining station has two rough machining machines 1 and 2, a back chamfering machine 3, and two finishing machines in the order of flow. A processing machine 4.5 and a cylinder diameter measuring machine 6 are provided. Note that the rough machining and finishing machining are performed using two machines each due to the installation spacing of the spindle heads in each machine. A plurality of spindle heads 11, 12.13, 14.15 are provided for each processing machine 1°2.3, 4.5, respectively, and a measuring head 16 is provided for the measuring machine 6. In this embodiment, each of the two roughing machines 1.2 and two finishing machines 4.5 is provided with a magazine support 7.7 which is movable along the machining line. In addition, since both magazine supports 7.7 have the same configuration, hereinafter, they will be referred to as finishing processing machines 4.5.
The magazine support 7 corresponding to the above will be explained, and at this time,
In the magazine support 7, the surface opposite to the processing line is the front surface. As shown in FIGS. 1 and 2, the magazine support 7 is held by a frame 8 that is erected across the machining line direction of the rework@4 and 5, and has a horizontal axis perpendicular to the machining line on the front side. The tool magazine 10 is provided with a tool magazine 10 that is indexed and rotated about 9, and an arm support 17 that can move forward and backward toward the processing line is provided on the upper part. Also,
An exchange arm 19 for transferring the tool holder 18 between the tool magazine 10 and the spindle head 14, 15 is pivotally attached to the arm support stand 17. The frame 8 has two rails 76a, upper and lower. 76b and a jack 20 parallel to these. The magazine support 7 includes a slider 21a that engages with the rails 76a and 76b. The main body part 7a has its back side attached to the frame 8 via 21b, and the installation stand 7b is fixed to one side of the upper end of the main body part 7a. A support drive motor 23 having a pinion 22 that engages with the rack 20 fixed to an output shaft is attached. This motor 23 has an indexing function, and each spindle head 11
The magazine support 7 is accurately indexed to a plurality of tool changers corresponding to ゜12.13.14, a plurality of detection positions for displacement detection to be described later, and a standby position. As shown in FIGS. 4 and 5, the tool magazine 10 is provided with a large number (for example, about 20 tool bots) 25 that open toward the front side along the circumference of a rotary plate 24. The rotating plate 24 is rotatably attached to the horizontal shaft 9 whose base end is fixed to the main body 7a via bearings 26, 26. Further, the main body portion 7a includes an output shaft 27a.
An index motor 27 provided with a driving gear 28 is fixed by a bracket 29, and on the other hand, a driven gear 30 that engages with the driving gear 28 is fixed to the back side of the rotating plate 24. As a result, the tool magazine 10 is moved to each gear 28 by the operation of the index motor 27.
．． 30, the position directly above the horizontal axis 9 is set as the attachment/detachment position of the tool holder 18, and the selected tool bot 25 is indexed and rotated so as to stop at the attachment/detachment position. Furthermore, a plate 31 is fixed to the tip of the horizontal shaft 9 and extends upward along the front surface of the one-rotation plate 24, and this plate 31 has a plate 31 that faces a dog plate 103 fixed to the rotation plate 24. A plurality of proximity sensors 104 are provided to detect the indexed position. Further, the upper end of this plate 31 is provided with the tool bot 2 in the attachment/detachment position.
A cover 32 corresponding to the lower side of 5 is attached. In addition,
Since the tool magazine 10 has a rear surface facing the processing machines 4 and 5, chips and the like generated during processing are transferred to the tool holder 18.
There is no need to worry about it. The tool bot 25 accommodates the proximal end portion of the tool holder 18, and a lock plate L/-) 34 penetrates toward the center of the tool magazine 10 along a bottom plate 33 fixed to the bottom of the tool bot 25. It is provided according to the condition. A pull stud is provided at the proximal end portion of the tool holder 18. The lock plate 34 has an engagement bolt 35 fixed to the end on the magazine center side, and has a pull stud head 1 fixed thereto, as shown in FIG.
8b, and a small diameter portion 3 that is continuous with the magazine center side of the large diameter portion 36a and has a size that corresponds to the diameter of the pull stud shaft portion 18a.
A lock hole 36 consisting of 6b is formed. Further, a cylindrical spring case 33a that opens on the front side is integrally molded on the bottom plate 33, and a locking pawl 38 biased toward the front by a spring 37 is inside the spring case 33a. Further, on the back surface of the lock plate 34, the pull stud shaft portion 18a is housed.
In the state in which the small diameter portion 36b and the small diameter portion 36b are engaged (shape 7!i shown by the solid line in FIG. 6), a 7-shaped recess 34a into which the pawl 38 protrudes and engages is formed. The tool holder 18 can be attached and detached within the tool bot 25 using the plate driving cylinder 3 fixed to the main body 7a.
9, this plate driving cylinder 39 is arranged in alignment with a vertical line passing through the center of the horizontal axis 9 when the tool magazine 10 is viewed from the front. The upper end of the cylinder rod 40 that projects vertically of the cylinder 39 has a hook portion 40a through which the head of the engaging port 35 can pass only in the magazine rotation direction, and the lower end of the cylinder rod 40 has a main body portion. A lock/unlock detection bar 41 extending toward the rear of 7a is attached. Note that a lock detection sensor 4 is provided on the back surface of the main body portion 7a, which corresponds to the raised position and the lowered position of the detection bar 41.
2a and an unlock detection sensor 42b are provided. In other words, the selected tool bot 25 is stopped at the above-mentioned attachment/detachment position, and the cylinder rod 40 of the plate drive cylinder 39 is driven downward. The lock plate 34 is pulled down through the locking port 35 inserted into the hook portion 4Q&, and the large diameter portion 36a corresponds to the pull stud shaft portion 18a as shown by the imaginary line in FIG. It will be in an unlocked state where it can be taken out. Moreover, when the tool holder 18 is accommodated,
By driving the cylinder rod 40 upward,
Push up the lock plate 34 and
and the small diameter portion 36b, and the ball 38 is strongly protruded into the recess 34a by the return motion of the spring 37, and the tool holder 18 is restrained within the tool pot 25 to be in a locked state. Furthermore, an annular frame 43 is provided in the main body 7a along the magazine center side of these engagement bolts 35 for each tool bot 25 other than the first attachment/detachment position, so that the lock plate 34 is not attached to the magazine in any position other than the attachment/detachment position. It completely prevents it from moving toward the center. Furthermore, as shown in FIG. 5, the annular frame 43 has a cutout portion at a distance of, for example, two tool pots (not particularly limited) from the attachment/detachment position, and a groove portion 4 through which the engagement port 35 can pass.
4a and an operating lever 45 is pivotally attached to the cutout portion. Therefore, in the tool magazine 10 in this embodiment, the engagement piece 44 is moved by the operating lever 45 at a position corresponding to two tool pots from the attachment/detachment position.
By rotating the groove 44a toward the center of the magazine,
The lock plate 34 is moved toward the center of the magazine via the engagement port 35 that is engaged inside the tool holder 1.
8 can be easily attached and detached manually. The arm support stand 17 has a slider 47a,
47b, and as shown in FIG. 7, the support base driving cylinder 4 is fixed on the installation base 7b.
Eight piston rods 48a are connected by a bracket 49, and are driven forward and backward toward the processing line by the support stand driving cylinder 48, and the arm support stand 17 is divided into two positions by the forward and backward limits of the cylinder 48. put out. The exchange arm 19 is connected to the arm shaft 5 as shown in FIG.
A casing 52 that further slidably holds a sleeve 51 into which a sleeve 51 is slidably inserted is provided with a rotation shaft 53 that extends in a direction perpendicular to the arm shaft 50.
With the axis of 3 parallel to the machining line, insert the bearing 5.
The rotation shaft 53 is inserted into the arm support base 17 via 4 and 54. Further, in the arm support base 17, a rack 55 parallel to the rails 46a and 46b is inserted below the rotation shaft 53, and an arm rotation cylinder 56 for moving the rack 55 in the axial direction. (shown in FIG. 7) is attached to the outer periphery of the rotating shaft 53, and a gear 57 that engages with the rack 55 is prevented from rotating. A pair of chuck arms 5 are provided at the tip of the sleeve 51.
8 are attached via brackets 59 which are pivotally supported to each other via shafts 58a so as to be freely openable and closable. This bracket 5
9 is integrally provided with a chuck portion 59a located between the chuck arms 58 and 58. The arm shaft 5
0 has an engaging recess 50a at its tip, and the other ends of the chuck arms 58 and 58 are rotatably engaged with the engaging recess 50a, and a spring compressed in the sleeve 51 60, it is constantly biased in the proximal direction. Further, inside the casing 52 and the rotating shaft 53, hydraulic oil passages 62a to 62c are formed which communicate with supply ports 61a to 61c provided in the arm support base 17, and these passages 62a to 62c is the arm shaft 50 and sleeve 5
1, an unchucking pressure chamber 63a formed between the
It communicates with an arm shift pressure chamber 63b formed between the sleeve 51 and the casing 52. The exchange arm 19 is connected to the arm shaft 5 by an arm rotation cylinder 56 via a rack 55 and a gear 57.
0 is rotated within a range of 270 degrees from a state where it hangs down in front of the tool magazine 10 to a state where it extends horizontally toward the processing line side. By hydraulic control to the pressure chamber 63a and the action of the spring 60, only the arm shaft 50 is moved forward and backward to open and close the chuck arm 58,58, and by hydraulic control to the pressure chamber 63b, the sleeve 51 is moved together with the arm shaft 50. advance or retreat. That is, the exchange arm 19 can be replaced with a tool by moving the sleeve 51 forward and pressing the chuck portion 59a against the tool holder 18, moving the arm shaft 50 backward and moving both chuck arms 58 and 58 in the direction of closing each other. The holder 18 is chucked (the state shown in FIG. 5). Further, a driven shaft 65 is connected in parallel to the base end of the arm shaft 50 via a connecting member 64.
5, a rod 66 having four dogs 66a to 66dt in the axial direction engages at right angles through a wedge engaging portion 67, whereas the arm support 7 has four dogs 66a to 66dt.
Sensors corresponding to 6a-66d (e.g. proximity switch)
A bracket 69 provided with 68a to 68d is used for attachment. That is, when the arm shaft 50 is moved in the axial direction, the rod 6
6 moves in the axial direction, and at this time, one of the dogs 66a to 66d corresponding to the movement position of the arm shaft 50 and the sensors 68a to 68d are set to face each other,
As a result, the open/closed states of the chuck arms 58 and 58 and the shifted state of the sleeve 51 are detected. A cover 70 is attached to the casing 52 to cover the base ends of the arm shaft 50 and the driven shaft 65. Further, at the end of the arm support stand 17 on the processing line side, a tool holder 1 attached to the spindle head 14.15 is attached.
A displacement detection sensor 71 whose inspection target is the outer circumferential surface of No. 8 is attached. The displacement detection sensor 71 is positioned so as to extend to the side of the tool holder 18 in a state where the arm support base 17 is shifted forward toward the processing line side, and can be a touch sensor, for example. Here, the tool holder 18 used in the finishing machine 4 (5) has a rod 72 slidably inserted on the axis of the main body, as shown in FIG. A wedge member (wedge portion) 74 for pressing the chip cartridge 73 toward the outside of the main body is screwed to the tip of the tip. The rod 72 has a proximal end protruding from the pull stud head 18b of the tool holder 18. The wedge member 74 has a downwardly inclined surface 74a (for example, about 2 degrees with respect to the perpendicular line) on its negative side, and is always urged upward by a spring 75 housed inside the wedge member 74. The chip cartridge 73 has a chip 75 attached to its lower end, and its upper end is fixed to the tool holder main body.
The pressure receiving part 73a protruding toward the center of the main body is connected to the inclined surface 7.
It is in a state where it is in contact with 4a. The finishing machine 4 (5) also includes a jig 77 and a jig 77 for positioning and holding the workpiece W (shown in FIG. 1) at a position below the main shaft radius 14 (15). Equipped with clamper 7B. The main shaft rad 14 is integrally attached to a saddle 107 that is fed and moved vertically by a feed motor 106 with respect to a column 105, and rotatably holds a spindle 79 inside, and also controls the spindle rotation consisting of a motor and a speed reduction mechanism. A drive section 80 is provided. Further, above the spindle 79, a cylinder 81 for clamping/unclamping the tool holder 18 and a correction device 82 for adjusting the amount of protrusion of the tip 75 are coaxially provided. Furthermore, the tool holder 1 in the spindle head 14
The clamp/unclamp control 8 is a mechanism that engages a Solstud and a clamp pole, which is often used in this type of device, and is always biased upward by a disc spring 83 on the axis of the spindle 79. It includes a pipe-like member 85 that is pushed downward by the piston 84 of the cylinder 81, and a clamp pole 86 that comes into contact with the lower end of the pipe-like member 85 and engages with the pull stud head 18b of the tool holder 1B. It consists of a sleeve 87. The correction device 82 includes, in a casing 88 attached to the upper end of the cylinder 81, a sliding body 90 having a piston 89 in the middle, and a male thread member 92 that is screwed into a threaded portion 91 formed in the casing 88. It is a provision. The sliding body 90 loosely fits the male threaded member 92, has a stopper 93 at the upper end that can be engaged with and detached from the male threaded member 92 only in the axial direction, and has a lower end with a stopper 93 through which a bearing 94 is inserted. The joint member 95 is attached in a coaxial state. The male thread member 9
2 is connected to an output shaft 96a of a stepping motor 96 fixed to the upper end of the casing 88. Further, an upper end of a correction shaft 97 is fixed to the joint member 95,
This correction shaft 97 is connected to the piston 84 of the cylinder 81.
The pipe member 85 is slidably passed through the pipe member 85, and its lower end abuts the rod 72 of the tool holder 18 in a coaxial manner. Incidentally, dogs 98 and 99 used for detecting the movement of these are attached to the piston 84 of the cylinder 81 and the sliding body 90 by brackets too and ioi, respectively. A clamp/unclamp detection sensor 108 and a correction axis original position/advance detection sensor 109 are provided on the fixed side corresponding to each of the dogs 98 and 99. Further, a compressed air supply path 102 that opens into the main spindle head 14 is formed in a portion of the spindle head 14 where the tool holder 18 is attached. With the above configuration, in the standby state, the magazine support 7 is located at a predetermined standby position, the arm support 17 is at a retreated position away from the processing line, and the exchange arm 19
A case will be described in which the tool holder 18 is mounted on the spindle head 14, 15, which is held in a horizontal position with its arm shaft 50 on the front side of the tool magazine 10. With the magazine support 7 indexed and stopped at the position corresponding to one finishing machining am4, the chuck arm 5
8. Rotate the exchange arm 1 in the opened state by 90 degrees until it becomes vertical, and by shifting the sleeve 51 forward and moving the arm shaft 50 backward, the chuck portion 59a and the chuck arm 58. and the tool holder 18 by the lock plate 34.
After releasing the restraint, the exchange arm 12 is rotated toward the 270' machining line side (the state shown by the two-dot chain line A in FIG. 1). At this time, the initial rotation movement of the exchange arm 12 causes the tool holder 18 to rotate. is pulled out from the tool pot 25 and the seventh
The support stand driving cylinder 48 is finally moved from the position shown by the two-dot chain line C in the figure to the position shown by the two-dot chain line.
The arm support base 17 is advanced by the tool holder 1.
8 is held out on the axis of the spindle head 14 (the state shown by the imaginary line B in FIG. 1), and then the tool holder 18 is placed on the spindle 72 of the ladder 14 by lowering the tool holder 14 onto the main shaft. Installing. Tool holder 18
When the pull stud is inserted into the unclamped sleeve 87 by the cylinder 81, the piston 84 is raised by the cylinder 81 and the disc spring 83, pulled upward by the sleeve 87, and completely clamped to the spindle 72. Even after that, it is held in the clamped state by the disc spring 83. After the above tool holder installation B, on the exchange arm 19 side,
The chuck arms 58, 58 are opened, the sleeve 51 is shifted backward to release the tool holder 18, and from this state, the arm support base 17 is shifted backward, and the exchange arm 12 is rotated 180 degrees to return to the standby position, and the support By driving the drive motor 23, the magazine support 7 is moved to the position corresponding to the next spindle rad 14 or the other finishing machine 5, and the tool holder 18 is similarly mounted or replaced. The tool holder 18 can be returned to the tool magazine 10 from the spindle head 14, 15 side by operating the arm 12 and the arm support stand 17 in the reverse process to when the tool holder is attached. Here, there is a possibility that chips and the like may be attached to the mounting portions of the tool holder 18 and the spindle 7 which may cause poor mounting. Therefore, after the attachment of the tool holder 18 is completed, the magazine support 7 is sequentially moved to the index position for displacement detection, and it is detected whether or not the attachment of the tool holder 18 is successful. The arm support base 17 is shifted as described above, and the displacement detection sensor 71 is made to correspond to the detected portion of the tool holder 18 . In this state, the spindle 7 is rotationally driven to rotate the tool holder 18 once, and at this time, by detecting the displacement accompanying the rotation with the displacement detection sensor 71, the amount of eccentricity of the tool holder 18 with respect to the axis of the spindle 72 is determined. Measure. and,
If the amount of eccentricity is less than a predetermined value, it is determined that the mounting condition is good and the arm support base 17 is shifted backward. On the other hand, if the amount of eccentricity is greater than a predetermined value, it is determined that the mounting is defective, and the chuck arm 58 grips the tool holder 18 again, and then the piston 84 of the cylinder 81 is raised to restrain the tool holder 18. Release it, and then remove the spindle head 1.
4 is slightly raised and compressed air is injected through the supply path 102 to air wash the mounting portion on the tool holder 18 and spindle 72 side, and then the tool holder 18 and the mounting portion on the spindle 79 are mounted again. If no decrease in the amount of eccentricity is observed, it is fully possible to automatically stop the operation of the device. Furthermore, if, for example, a positive error is detected a predetermined number of times in a row in the measurement process at the final station, the processing machine 4.5 uses the piston 82 of the correction device 82 to raise the sliding body 20 in response to the correction signal. After releasing the engagement between the externally threaded member 2 and the stopper 23,
By lowering the male threaded member 22 by a predetermined amount by driving the stepping motor 96 and lowering the sliding body 20 again,
With the sliding body 20 and the correction shaft 27 in a lowered position, the correction shaft 97 pushes the rod 72 and the wedge member 74, and the chip cartridge 73 is pushed through the pressure receiving part 73a that comes into contact with the inclined surface 74a. By suppressing and deforming the lower end side, the amount of protrusion of the chip 75 can be increased. The details of the automatic tool changer according to the present invention are not limited to the above embodiments. For example, the automatic tool changer according to the present invention is not limited to the above embodiments. In addition, in the case of the process as in the above embodiment, machining of the planning table for rough cutting and finish cutting can be carried out using 4M!
It is also possible to provide a configuration in which one magazine support 7 is provided for each angle of 1.2° and 4.5°.

【Effect of the invention】

As described above, the automatic tool changer of the present invention includes a magazine support that is movable along a machining line consisting of a plurality of machining stations, and a The arm support includes a tool magazine that is indexed and rotated about a substantially orthogonal horizontal axis, and an arm support that can move forward and backward toward the processing line. Since the exchange arm that transfers tool holders between the tool magazine and the spindle head of each processing station is rotatably provided, there is no need to provide equipment for tool holder exchange on the processing machine side, and the tool magazine A single magazine support with an exchange arm and an exchange arm allows efficient automatic exchange of tool holders for multiple machining stations, and this automatic exchange function simplifies and occupies the entire machine. It is possible to save space. In addition, since the tool holder is inserted into and removed from the tool magazine by the rotational movement of the exchange arm, the shift operation in the tool axis direction when installing and removing tools can be omitted, reducing the time required for installing and removing tools. There is no need to provide a shift mechanism in the tool axis direction on the exchange arm side, making the device compact. In addition, the arm support is equipped with a displacement detection sensor whose inspection target is the outer peripheral surface of the tool holder attached to the spindle head, so the same unit can automatically detect the attachment status of the tool holder to the spindle head. can,
Using the detection results, it becomes easy to implement reliable automatic control to achieve stable machining without tool runout. Further, using a tool holder in which a rod is slidably inserted on the axis of the main body and a wedge portion is provided on the rod for pressing the chip cartridge toward the outside of the main body, the tool holder is attached to the spindle head in a coaxial state with the rod. a correction shaft that comes into contact with the
Since it is equipped with a tool correction device that adjusts the position of the correction axis in its axial direction, it is possible to realize automatic correction of the chip protrusion amount in the tool holder, and it is possible to reduce time loss due to correction work. Become.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the invention, - a processing stage;
A side view illustrating the processing machine and magazine support in the machine.
Fig. 2 is a front view illustrating the magazine support, Fig. 3 is a plan view illustrating the entire automatic tool changer, Fig. 4 is a sectional view of the tool magazine portion of the magazine support, and Fig. 5 is the tool magazine. and a sectional view of the front side of the exchange arm, Figure 6 is a front view explaining the lock plate, Figure 7 is a side view of the exchange arm part in the magazine support, and Figure 8 is the main components of the spindle head when the tool holder is attached. FIG. DESCRIPTION OF SYMBOLS 1-5... Processing machine, 7... Magazine support body, 9... Horizontal axis, 10... Tool magazine, 11-16... Spindle head, 17... Arm support base, 18. ...Tool holder, 19...Exchange arm, 71...Displacement detection sensor, 72...Rod, 73...Chip cartridge, 74...Wedge member (wedge part), 82...Correction Device, 97...Correction axis. Patent applicant: Nippei Toyama Co., Ltd. Patent attorney Yutaka Oshio

Claims (4)

[Claims] (1) A magazine support is provided that is movable along a machining line consisting of a plurality of machining stations, and the magazine support includes a tool magazine that is indexed and rotated about a horizontal axis substantially perpendicular to the machining line, and An arm support base that can move forward and backward toward the machining line is provided, and an exchange arm that transfers the tool holder between the tool magazine and the spindle head of each machining station is rotatably provided on the arm support base. An automatic tool changer characterized by: (2) The automatic tool changer according to claim 1, wherein the tool holder is inserted into and removed from the tool magazine by rotating the change arm. (3) The automatic tool changer according to claim 1 or 2, wherein the arm support is provided with a displacement detection sensor whose inspection target is the outer peripheral surface of the tool holder attached to the spindle head. (4) Using a tool holder in which a rod is slidably inserted on the axis of the main body, and the rod is provided with a wedge portion that presses the chip cartridge toward the outside of the main body, the tool holder is attached to the spindle head coaxially with the rod. Claim 1, 2, or 3, further comprising: a correction shaft that contacts the correction shaft in the state; and a tool correction device that adjusts the position of the correction shaft in its axial direction.
Automatic tool changer as described.