JPS6374541A - Machine tool - Google Patents

Abstract

PURPOSE:To replace a cutting part module and make it small-sized by providing a tool magazine storing the cutting part module and a tool assembling device assembling and disassembling a holder module and the cutting part module. CONSTITUTION:A tool magazine 5 and an ATC 6 are provided on one side of a machining center main body 1, and tools are selectively taken out and fitted to a main spindle 2. A modular tool 11 is constituted of a holder module 12 and a cutting part module 13, a hooking claw 15 is provided at the tip of a taper section 14, and a flange section 16 and a petal-shaped hooking claw 17 are provided at the lower end. A tool delivery position 22 is provided on the rear side of the tool magazine 5. A tool assembling device 23 is provided longitudinally movably and oppositely to this tool delivery position 22. An assembling head 26 is mounted on a table 24, and the modular tool 11 is assembled or disassembled with this assembling head 26.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Field of Application of the Invention) The present invention relates to a machine having a function of assembling and disassembling a modular tool and automatically transferring the modular tool to and from a machine tool. Regarding machines.

(Prior art) For example, a tool magazine that stores many different types of tools is installed in the main body of a machining center, and when a command signal specifying the type of tools required for machining is input from a control device, the tool magazine is activated. The tool has a function of indexing a specified tool, attaching the tool to the spindle using an automatic tool changer provided in the main body, and removing the tool attached to the spindle and storing it in the tool magazine. This is known, for example, from Japanese Patent Application Laid-Open No. 59-192433.

(Problems to be Solved by the Invention) However, 1. In the machining center as described above, one integrated tool is used. This one-piece tool generally consists of a tapered holder part a, a collar part and a cutting edge part C, as shown in FIG. Although the cutting edge portion C varies depending on the purpose of machining, the shape of the holder portion a is formed to be the same in order to be attached to a common main shaft of a machining center. Therefore, in the case of one integrated tool, prepare multiple tools that differ only in the cutting edge C,
This must be stored in the tool magazine.

For this reason, the cost per tool increases, and
The tool magazine that stores the tools becomes large, and the equipment of the machining center becomes a major loss.

This invention has been made in view of the above-mentioned circumstances, and its purpose is to automatically assemble the blade module to the holder module and attach it to the main shaft, and to attach the blade module to the main shaft after use. It is an object of the present invention to provide a machine tool in which only the blade module can be replaced by disassembling the tool magazine, thereby reducing the size of the tool magazine and the cost of tools.

[Structure of the invention]

(Means and effects for solving the problem) The present invention provides a tool magazine for storing a plurality of different types of blade modules constituting a modular tool and a holder module constituting the modular tool. It is equipped with a tool assembly device that assembles and disassembles the holder module and the blade module as well as grips it, and the modular tool assembled by this tool assembly device is moved to the tool delivery position, and the disassembled blade module is stored in the tool magazine. This is due to the fact that it was configured to do so.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the entire machine tool, for example, a machining center, where l is the main body of the machining center. The front part of this machining center main body I is provided with a main shaft 2 movable in the x and Y directions, and the lower part is provided with a workpiece 3.
A table 4 is provided on which the items are placed. A tool magazine 5 and an automatic tool changer (hereinafter referred to as ATC) 6 are provided on one side of the machining center main body 1, and tools stored in the tool magazine 5 are selectively taken out and mounted on the spindle 2, The tools mounted on the spindle 2 can be removed and stored in the tool magazine 5 automatically. That is, the tool magazine 5 is composed of a vertically long flat elliptical guide rail 7 and a plate chain 8 that is guided by the guide rail 7 and runs endlessly.

Each plate 9 of this plate chain 8...
are provided with tool holders IO consisting of through holes, and each module constituting the modular tool 11 is housed one by one in these tool holders 10 . That is, the modular tool II is composed of a holder module 12 and a blade module 13, as shown in FIG. A flange portion I6 and a petal-shaped engagement claw I7 are provided. In addition, the blade module I
A petal-shaped retaining hole 18 that can be engaged with the engaging claw 17 of the holder module I2 is provided at the upper end of the holder module 3, and a blade portion I9 is provided at the lower end of the holder module I2.
By engaging the engagement claw 17 of the holder module II with the retaining hole I8 of the blade module 13, they are integrally connected to form a modular tool II. Note that 20 is tightened with a bolt. Among the modular tools 11 configured in this way, a large number of blade modules 13 of different types are stored in the tool holder IO of the tool magazine 5, and the blade module 1
3 can be inserted and removed from the back side of the tool magazine 5.

A tool delivery position 22 is provided on the back side of the tool magazine 5, as shown in FIGS. 2 to 4. A tool assembly device 23 is provided opposite the tool delivery position 22 so as to be movable back and forth. This tool assembly device 23 will be described. Reference numeral 24 denotes a table movable in the front and back direction, and this is configured to be slidable by an air cylinder 25.

An assembly head 26 is mounted on the top of the table 24, and the assembly head 26 is used to assemble and disassemble the modular tool II. This assembly head 26 is constructed as shown in FIG.
7 is a tool gripper.

A rotary drum 30 is rotatably supported inside the gripper main body 28 via a bearing 29 . A tapered hole 31 is provided at the lower end of the rotating drum 30, and a drawbar 33 having a collet chuck 32 is provided at the bottom thereof. The door a-pa is connected to a piston 35 of a hydraulic cylinder 34 provided inside the rotating drum 30, and the drawbar 33 is biased in the retracting direction by a disc spring 36. Note that 37 is a drive mechanism that rotationally drives the rotating drum 30, and 38 is a rotary coupler that sends hydraulic pressure to the hydraulic cylinder 34. Then, the holder module I2 of the modular tool 11 is attached to the tapered hole 3I. Further, a nut runner 40 is provided on the side wall of the grip main body 28 via a bracket 39. This Natsutranna 40
is composed of a drive motor 4I, a gear mechanism 42, and a tightening shaft 43;
It is configured so that it can be pressed against the tightening bolt 20 of the modular tool rr.

The assembly hect 26 configured in this way is made of tape k 24.
1c! Is it tool delivery? The tool holder 10 of the tool magazine 5 is configured to be able to move forward and backward with respect to the station 22 and the tool holder 10 of the tool magazine 5.

Further, the ATC 6 automatically exchanges old and new tools, and the longitudinal intermediate portion of the tool exchange arm 45 is a rotary excavator! 46 is attached to the rotating shaft 47.

Clampers 48 and 49 are provided at both ends of the tool exchange arm 45 to grip the collar I6 of the holder module I2 constituting the modular tool II. The tool exchange arm 45 is movable around a rotating shaft 47, and in a horizontal state, one clamper 48 faces the main shaft 2, and the other clamper 49 faces the tool transfer decision 22. It is possible to grip the modular tools II, II, which are located in opposing positions.

Next, the operation of the machining center configured as described above will be explained. Main shaft 2 of machining center main body I
When machining with the modular tool 11 mounted on the main spindle 2 is completed, and when machining is to be performed next with another new modular tool 11, remove the used modular tool II mounted on the spindle 2, A new modular tool II needs to be installed on the spindle 2. In such a case, an activation signal is input from the control device of the machining center main body I to the tool magazine 5, the tool assembly device 23, and the ATC 6 based on the production management information. First, when a tool designation signal is input to the tool magazine 5, the plate chain 8 runs in forward and reverse directions to position the designated tool, that is, the tool holder 10 holding the blade module 13, at the tool delivery position 22. Ru.

At this time, the holder module I2 constituting the modular tool II is attached to the tool gripper 27 of the assembly head 26 of the tool assembly device 23, and as the table 24 moves forward, the holder module I2 attached to the assembly head 26 is attached to the tool gripper 27 of the assembly head 26 of the tool assembly device 23. It faces the blade module I3 of the holder 10. Then, as the assembly head 26 moves forward, the holder module I
The second engaging claw I7 engages with the retaining hole I8 of the blade module 13, and the holder module I2 and the blade module I3 are coupled. Here, when the air cylinder 44 moves forward and presses the shaft 43 to tighten the nut runner 40, the tightening is performed by pressing the shaft 43.
is engaged with the tightening bolt 2o, and when the motor 4I rotates in this state, the tightening shaft 43 rotates via the gear mechanism 42, and the tightening bolt 20 is tightened. Therefore, the holder module I2 and the blade module 13 constitute the Mo/7 blade tool 11. When the assembly of the modular tool II is completed, the assembly hect 26 is moved back by the table 24, and the blade module I3 is removed from the tool holder IO and separated from the tool magazine 5. When the assembly head 26 retreats to a predetermined position, it moves to the tool delivery position 22, and the assembly head 26 holding the modular tool 11 is positioned at the tool delivery decision 22. -Therefore,
The modular tool II held by the assembly hect 26 is positioned at the same position in the Y direction as the modular tool II mounted on the main shaft 2 of the machining center main body I. In this way, the new and old modular tools II.

11 are arranged in parallel, the tool exchange arm 45 of the ATC 6 rotates clockwise about the rotation shaft 47. Then, one cranometer 44g of the tool exchange arm 45
is the flange IS of the modular tool 11 that is attached to the spindle 2.
, and the other crank arm 49 grips the flange I6 of the movable tool II attached to the assembly head 26.

When the new and old modular tools II and 11 are flanged in this way, the lock of the modular tool II by the main shaft 2 is released, and the lock of the modular tool 11 by the assembly shaft 26, that is, the chuck by the collet chuck 32 is released. Next, when the tool changing arm 45 is moved forward by the rotary gear cylinder 46, the crank/4'411.
The new and old modular tools II and 11 held by the handle 49 are extracted from the spindle 2 and the assembly hect 26, respectively. Then, when the modular tools II, 11 are separated from the spindle 2 and the assembly head 26, the tool exchange arm 45 rotates 180° about the rotation axis 47. therefore.

The old and new tools II, 11 are replaced in their positions, with the new modular tool II facing the spindle 2 and the old modular tool II facing the assembly head 26. and,
Tool exchange arm 45 by rotary gear cylinder 46
, the new modular tool 11 is attached to the spindle 2, and the old modular tool II is attached to the assembly head 26.
will be installed on the The modular tool II attached to the main spindle 2 is locked in a machinable state, and the assembly hect 2
The engaging claw 15 of the holder module I2 of the movable tool II mounted on the holder module I2 is held by the collect chuck 32. When the exchange of the new and old modular tools II, II is completed, the tool exchange arm 45 returns to the neutral state, and the assembly head 26 is retracted by the table 24. next,
The air cylinder 44 advances to engage the shaft 43 with the tightening slot 20 of the modifier tool II. Then, when the tightening shaft 44 is rotated from the motor 4I via the gear mechanism 42, the tightening bolt 20 is loosened, and the holder module I2 can be separated from the blade module I3. Here, the assembly head 26 transfers the tool due to the operation of the table 24. Retreat from Solution 22. When the modular tool II mounted on the tool head 26 faces a predetermined tool holder 10 of the tool magazine 5, the table 2
4 is activated, the assembly head 26 moves forward, and the blade module I3 is inserted and held in the tool holder 10. In this state,
The drive mechanism 37 of the assembly head 26 operates to rotate the rotating drum 3.
0, the engaging claw I7 of the holder module I2
The engagement between the blade module 13 and the engagement hole I8 is released. Then, when the assembly hect 26 is moved back by the table 24.

The holder module I2 and the blade module I3 of the old modular tool 11 are separated and disassembled, and the blade module I3 is installed in a predetermined tool holder 10 of the tool magazine 5.
will be stored in. Therefore, preparations for assembling the modular tool II to be used in the next machining are started, and the different types of blade modules I3 are selectively KM-combined into the common holder module I2 and supplied to the main shaft 2 of the machining center main body 1. The used modular tool 11 can be disassembled and assembled during processing.

According to the above-mentioned embodiment, the holder module and the blade module may constitute a modular tool, or the blade module may be connected to the holder module via an adapter module to configure a modular tool. In this case, the 7-dagta module can be stored in the tool magazine, and the adapter module can be taken out and installed as needed.

Further, in a blade module such as a milling cutter where the blade portion has a larger diameter than the base portion, it is possible to pull it out from the tool holder in the axial direction. Therefore, as shown in FIG. 7, a tool holder 5I having a U-shaped notch 50 is provided in the tool magazine, and the flange 53 of the 7-rice cutter 52 serving as the blade module is locked and held for one assembly. By moving the head (not shown) in the direction of the arrow to take in and out the seven rice cutter 52, the tool can be held in a stable state.

Furthermore, the tool magazine is made up of a guide rail and an endlessly running plate chain, which stores a large number of tools such as blade modules.

As long as the mechanism is capable of selectively positioning the tool designated by the tool designation signal to the tool assembly position, its structure is not limited to the above embodiment and can be modified as appropriate.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to automatically assemble the blade module to the holder module, to configure a tool that modulates and attach it to the main shaft, and to attach the modular tool after use. It is possible to automatically disassemble the blade module and replace only the blade module. therefore,
The tool magazine can be made smaller than the conventional one-piece tool magazine that stores one tool, and tool costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a front view of a machining center showing an embodiment of the present invention, Fig. 2 is a front view of a tool assembly device and an automatic tool changer, and Fig. 3 is a sectional view taken along line I-1 in Fig. 2. ,
Figure 4 is a sectional view taken along the line ff-■ in Figure 3, Figure 5 is a vertical front view of the assembly head, Figure 6 is a side view of the modular tool, and Figure 7 is a tool holder that holds the slicing cutter. FIG. 8 is a side view of a conventional integrated device. I...Machining center main body, 2...Spindle, 5...Tool magazine, 6...ATC (automatic tool changer), I
I...Modular tool, I2...Holder module. 13... Blade mosier, 22... Tool delivery position, 23... Tool assembly device. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 3 Figure 5

Claims (1)

[Claims] In a machine tool equipped with an automatic tool changer that exchanges a tool mounted on the spindle with a tool located at a tool transfer position, the machine tool body stores a plurality of different types of blade modules constituting a modular tool. A machine tool comprising: a tool magazine that holds a holder module constituting the modular tool; and a tool assembly device that holds a holder module constituting the modular tool and assembles and disassembles the holder module and the blade module at an assembly position.