JPS58143931A - Machine tool with tool changer - Google Patents

Abstract

PURPOSE:To improve the efficiency of the job with a shorter time of the tool changing work by separating a special tool area from a standard tool area for common use so as to enable the changing of tools alone in the special tool area in package with a tool changer. CONSTITUTION:A tool magazine 10 is separated into a standard tool area used in common for various works W and a special tool area 11 necessary for work W to be machined. A tool changer which withdraws and inserts a tool into the area 11 is set on a truck 12 self-travelling on a rail 15 between a tool stocker 16 and a tool magazine 10 on the side of a machine tool 4. After the changing of the tool of the tool magazine 10 for the special tool area 11, the truck 12 is self-travelled to return the tool withdrawn to the stocker 16 and a tool retaining body 14 is turned by 180 deg.. The retaining body 14 is inserted into a tool socke of the empty stocker 16 and lowered to the tool withdrawn to the stocker 16 completely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a machine tool equipped with a tool changing device.

The purpose of the present invention is to make it possible to replace only the special tools required for each workpiece in a tool magazine at once, and to shorten the time required for changing tools when changing workpieces. This eliminates waste.

In a machine tool equipped with a tool magazine, the tools stored in the tool magazine include tools commonly used for various workpieces and tools used exclusively for the workpiece to be machined. Ru. Therefore, it is necessary to replace the dedicated tool as the type of workpiece to be machined changes.

Conventionally, there is a system that responds to changes in the workpiece being machined by replacing the entire magazine, but with this system, even tools that can be commonly used for machining various types of workpieces have their own magazines. Therefore, it is wasteful to stock a large number of common tools, and it takes a lot of time to change the setup by replacing the magazine, which has a negative impact on the efficiency of machining workpieces.

The present invention solves the above-mentioned conventional problems, and its features include forming a dedicated tool area in the tool magazine to store dedicated tools that require replacement in addition to commonly used tools;
To provide a machine tool equipped with a tool changing device that extracts tools from a dedicated tool area all at once and stores required tools all at once when tools are replaced.

Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, 1 is a base of a machine tool, 2 is a slide table that is moved by a servo motor on a pace 1, and has a pallet 3 on which a workpiece W is placed on its upper surface. Reference numeral 4 denotes a column of the machine tool that moves forward and backward on the base 1 toward the workpiece W on the slide table 2. to move up and down.

7 is a spindle supported by the spindle head 5, and 10 is a chain-type tool magazine. A tool exchange arm 8 is installed between the tool magazine 10 and the spindle 7 via a rotating body 9, and is used to exchange tools between the tool magazine 1o and the spindle 7 at the tool exchange position P.

In the present invention, the tool magazine 10 is divided into a standard tool area commonly used for various workpieces W and a dedicated tool area 11 required for the workpiece W to be machined. A tool changing device for extracting and inserting tools into the dedicated tool area 11 is disposed on the side facing the tool magazine 10. This tool changing device may be a stationary type or a portable type as shown in the figure. In the case of a portable type, as shown in FIG. Transport vehicle 12 that runs by itself on rails 15 between 10 and 10
A tool changer is installed above. In the tool stocker] 6, special tools for various workpieces A, B,
. . . It is stored in sections and indexed to a predetermined position by an indexing motor 17. 13 is a motor for driving the transport vehicle 120; 18 is a stopper for stopping the transport vehicle 12 at the position of the tool magazine 10; and 19 is a stopper for stopping the transport vehicle 12 at the position of the fly tool stocker 16.

Further, the tool magazine 10 and the tool stocker 16 are provided with a tool socket 21 in addition to an endlessly rotating chain 71. Each tool socket 21 is provided with a spring device for preventing the tool 22 inserted into the tool socket 21 from being pulled out.

The configuration of the tool changing device installed on the carrier vehicle 12 will be described below.

A pilot bar 30 is provided on the conveyor vehicle 12 in an axial direction parallel to the axis of the tools stored in the tool mapper 10 and the tool stocker 16, and a movable platform 29 is provided which is guided by the pilot bar and moves forward and backward. 38 is a cylinder for moving the movable base 29 forward and backward. On the movable base 9, there is a vertical direction perpendicular to the tool axis (hereinafter referred to as the vertical direction).
A tool holder 14 is provided which is movable in this direction and can be pivoted about an axis parallel to this direction (hereinafter referred to as horizontal pivot). The drive mechanism for vertically and horizontally turning the tool holder 14 has a pivot shaft 31 rotatably supported on a movable base 29, and a pinion 32 is formed on the pivot shaft 31. Also,
The rack shaft 33 that engages with the binion 32 is moved to the movable base 29.
The piston rod 34 of a rotating cylinder (not shown) is connected via a connecting member 35. Furthermore, a cylinder 41 in the vertical axis direction is provided within the pivot shaft 31, a piston 36 and a piston rod 37 integral with the piston 36 are provided within the cylinder 41, and the piston rod 37 is made to protrude from the upper end of the pivot shaft 31, It has a structure in which its protruding end is connected to the tool holder 14. The piston 36 rotates integrally with the pivot shaft 31 (the piston 36 is engaged with the pivot shaft 31 in the direction of rotation).

The tool holder 14 has a plurality of tools 22'? : Tool holding members 27α, 27h that engage and hold in parallel in a horizontal state
are provided at opposite positions across the rotation axis. The tool holding members 27α, 27h are provided with a plurality of tool engaging recesses and gripping claws 6 for gripping the tool 22 that is engaged and held in the tool engaging recesses 24&C. Reference numeral 26 denotes a spring that suppresses each gripping claw 25 in the direction of gripping the tool. Therefore, when the tool 22 is advanced to the tool holding member, the gripping claw 5 swings against the pressing force of the spring portion to allow the tool 22 to be advanced.

A locking plate that engages with a groove 42 formed in the tool socket 21 to prevent displacement of the tool socket 21 is fixed to the transport vehicle 12. 39 is a pump unit, and 40 is a hydraulic control circuit.

Next, the operation of the present invention will be explained from the time when machining of the previous workpiece is completed.

The conveyance vehicle 12 is moving toward the tool stocker 16, and the tool stocker 16 indexes and positions a special tool required for the next workpiece W at a predetermined position. On the other hand, the tool magazine 10 is indexed to the dedicated tool area 11' and the tool exchange position.

The movable platform 29 on the carrier 12 that is moving toward the tool stocker 16 moves forward toward the tool stocker 16, and the tool holding member 27α facing toward the tool stocker 16 stops directly below the dedicated tool at the indexing position. . Thereafter, the tool holder 14 rises due to the operation of the cylinder 41, and the tool holder 27
The tool engaging concave portion α engages with the tool 22, and the tool 22 is gripped by the gripping claw δ. Next, the movable table 29 is moved backward to remove the tool 22 from the tool socket 21 and hold it in the tool holding member 27α. The pivot shaft 31 operates at the end of the backward movement of the movable base 29, rotates the tool holder 14 by 180 degrees, and lowers the tool holder 14. Then, the transport vehicle 12 self-propels toward the machine tool 4 side,
Tool magazine] Stops at the position opposite to 0. At this time, the locking plate row fixed to the transport vehicle 12 engages with the concave groove 42 of the tool socket 21 of the dedicated tool area 11 indexed to the tool exchange position, and the tool socket 21 is moved in the longitudinal direction. to regulate the fluctuation of the Further, the tool holding member 27b facing the tool magazine 10 side is in an empty state in which no tools are held.

In this state, first, the previously used tool n is extracted from the dedicated tool area 11 of the tool magazine 10. That is, in the same way as when removing tools from the tool stocker 16, the movable base 29 is advanced, the tool holder 14 is raised, and the movable base 29 is moved forward.
Move 9 backwards -r. The used tool n from the special tool area 11 is now taken out and held in the tool holding member 2'7h. Then, with the tool holder 14 in the raised state, the tool holder 1
Turn 4 180°. As a result, the tool holding member nα holding the tool 22 extracted from the tool stocker 6 is directed toward the tool magazine 10 side. Then, the movable base 14 moves forward again, and the tool 22 held by the tool holding member nα is removed from the tool socket 21 of the dedicated tool area 11.
Insert into. After that, the tool holder 14 moves downward, and the tool 2 inserted into the tool socket 21 of the dedicated tool area 11 is removed.
2 is released from the tool holding member nα, and the tool holding body I4 moves backward. This completes the tool replacement in the dedicated tool area 11 of the tool magazine 10, and the carrier 12 should return the extracted tool 22 to the tool stocker 6 (tool stocker 1).
Self-propelled to the 6th side. The tool holder 14 on the carrier 12 located on the tool stocker 16 side rotates 180 degrees, turns the tool holder 27b holding the removed tool n toward the tool stocker 16, and raises the tool holder 14. And movable platform 2
After moving forward 9 and inserting it into the tool socket 21 of the empty tool stocker 16, the tool holder 14'a? The return of the extraction tool to the tool stocker 16 is completed by the downward movement K.

If the operator prepares the hot tool on the tool holding member, the tool can be replaced by a stationary tool changer instead of the conveyor vehicle 12.

As described above, according to the present invention, when replacing a special tool when a workpiece is changed, the tool magazine is divided into a standard tool area and a special tool area that are shared for various workpieces.
Since only the tools in the dedicated tool area are replaced at once using the tool changer, the tool replacement work can be completed in a short time, improving the efficiency of machining work, and the entire magazine can be replaced at once. This has the advantage that there is no need to prepare a standard tool for each magazine, which results in cost savings, compared to those that require replacement.

[Brief explanation of drawings]

Fig. 1 is a side view of the present invention, Fig. 2 is a plan view of the tool changer, Fig. 3 is a sectional view taken along line T' in Fig. 2, and Fig. 4 is Fig. 3 IV.
-IV line sectional view. 1...pace, 2.meeting/slide table, 4...
Column, 5. 1111 spindle head, 8. fist/tool exchange arm, 10... tool magazine, 11... Φ dedicated tool area, 14... tool holder, 20 @ good chain, 211
1... Tool socket, 2211... Tool, 24... Tool engaging recess, δ... Gripping claw, 27. Z, 271
4... Tool holding member, 29... Movable base, cabinet 06. Pilot bar, 31---swivel shaft, 36---piston, 37... piston rod, HO... cylinder for advancing and retracting operation. 11- Procedural amendment (spontaneous) March 1980 Commissioner of the Japan Patent Office Haruki Shimada 1. Indication of the case 1982 Model Permit Collection No. 21201 No. 2 Title of the invention Machine tool equipped with a tool changing device 3 Amendment Patent applicant 4, agent 5, date of amendment order 6, number of inventions increased by amendment 7, drawings subject to amendment 8, contents of amendment As shown in the attached sheet

Claims (1)

[Claims] A special tool area is formed in the tool magazine of the machine tool to store tools that are commonly used for various workpieces, as well as tools that need to be replaced and are dedicated only to the workpiece to be machined. a movable base that is disposed on the side opposite to the dedicated tool area and capable of moving forward and backward in a direction parallel to the tool axis of the dedicated tool area; and a tool holder that is movable in a direction perpendicular to the tool axis and pivotable around an axis parallel to this direction, and the tool holder has a tool holder at a position opposite to the tool holder with the rotation axis in between. An engagement grip part is provided for holding a plurality of tools at the same pitch as the arrangement pitch of tools in the tool area trap, and further, by moving the movable base and tool holder, the plurality of tools can be held in the dedicated tool area. A machine tool equipped with a tool changing device that is provided with a drive mechanism that simultaneously transfers the tool to and from the tool holder.