JPS597538A - Tool exchanging device for multi-spindle machine tool - Google Patents

Abstract

PURPOSE:To enable tool exchange in arbitrary number, by providing a plurality of receptacle parts holding tools on an exchange arm. CONSTITUTION:An exchange arm 1 being supported by a rotary shaft is turned and vertically moved. A plurality of pieces of receptacles 2 is provided on each of right and left sides of the arm. A plurality of pieces of tools 30 is detachably and attachably supported by a tool drum 3 which is turned by making a supporting shaft 36 into a fulcrum. A spindle 4 is secured to a sliding unit 32 and a plurality of pieces of receptacle parts 5 for tools 30 is on the bottom of the spindle. In case of exchange of the tools of the spindle 4, the exchange arm 1 is turned to a position wherein its receptacle parts 2 are fitted to the spindle 4 and the tool drum 3. Then, the arm 1 is moved upward and the tools of the spindle and the tool drum 3 are pulled into the receptacle parts 5 respectively The exchange arm 1 is turned an angle of 180 deg. again, raised again and the tools of the spindle and the tool drum are exchanged with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool changing device for a multi-axis machine tool.

The change arm 20 of the conventional tool changing device of this type has two holes instead of the one that normally has one hole, as shown in Fig. 1.
Or, as shown in Figure 2, 172 tools 21 can be inserted into the
However, these could not be used to transfer and exchange multi-axis tools 21.

With the method of gripping the tool 21 in the rotating plow, it was not possible to transfer any number of tools.

Furthermore, when a rotating arm is provided, preventing multiple tools from falling becomes mechanically complicated.

The present invention has been made in view of the above circumstances, and its purpose is to be able to grip a tool by moving the change arm toward the spindle side, and to replace a plurality of tools at any time. An object of the present invention is to provide a tool changer for a multi-axis machine tool that can transfer as many tools as needed.

Hereinafter, the present invention will be explained with reference to FIG. 3 and subsequent figures.

In the drawing, 31 is a column, and a slide unit 32 is provided on a slide base 33 of the column 31 so as to be movable up and down.
Also, the slide base 33 has a slide unit 32.
A feed motor 34 is provided to control the lifting and lowering of the shaft.

A spindle 4 is fixed to the slide unit 32. A storage section 5 for storing a plurality of tools 3o is provided on the lower surface of the spindle 4. The spindle 4 has a clamp of a clamping mechanism (not shown) of the next tool 30 inserted into each storage part 5,
A cylinder device 351z for operating the unclamp is provided. Hydraulic circuit 36 of each cylinder device 357-4. The first is provided with electromagnetic switching valves r and -V4, respectively.

3 in the drawing is a tool drum, and the tool drum 3 is a support shaft 36.
It is rotated around the fulcrum.

The tool drum 3 holds a plurality of tools 30 in a detachable manner.

I in the drawing is a change arm, and the change arm 1 is held by a rotating shaft 37, and this rotating shaft 37 is connected up and down to a rotating mechanism (not shown), and moves as shown by the arrow.

A plurality of tool storage sections 2 are formed on the left and right sides of the change arm 1. As shown in FIG. 7, these tool storage sections 2 are equipped with a storage block 10 that is fitted into a mounting hole 38 formed in the change arm 1. A gripping mechanism AO consisting of a spring 7 and a spring receiver 39 for biasing the inner trap is provided. In the cylinder block of the engine that is the workpiece, the same series of 3-cylinder 111 cylinder and 4-cylinder cylinder blocks, ll+, 7, have the same cylinder bore hole diameter and the same pitch.
When machining 12, normally 3-cylinder cylinder block A1
When the four-cylinder cylinder block A2 and the bore hole 43 are aligned, they overlap by one dimension as shown in FIG.

While the four tools 30 for machining the four-cylinder cylinder block 42 are attached, the three-cylinder cylinder block 4 is machined.
1 cannot be processed.

Next, the operation will be explained. Now, 4 cylinder block 42
When machining , the spindle 4 currently has φD and a machining tool 30 attached, and when converting φ1) to a machining tool 30' for the next work, the change arm l is stored in the spindle 4 and tool drum 3. Swivel part 2 into a suitable position.

Next, the change arm 1 is moved upward by the vertical and rotating mechanism, and each tool 30 is placed in the tool storage block 1° of the storage section 2.
30' is inserted, and the balls 8 are fitted into the grooves II of the tools 30, 30' to grip the tools 30, 30'. In this state, the clamp of the tool 30 by the clamp mechanism of the spindle 4 is released, the change arm 1 is lowered, and the tools 30, 3 are
0' from the spindle 4 and tool drum 3.

Next, the change arm 1 is rotated 180 degrees using the vertical and rotating mechanism, and the change arm 1 is raised again.
, 30' are clamped to the spindle 4 and tool drum 3, tools can be replaced.

When machining the 3-cylinder cylinder block A1, the control means of the clamp mechanism clamps only three of the four tools 30 when the tools are clamped, leaves one tool unclamped, and moves the change arm 1 using the up/down and rotation mechanisms. When lowered, the tool 30 clamped to the storage portion 5 of the spindle 4 remains on the spindle A, and the unclamped tool 30 is provided with the spindle 4, leaving only the F13 tools on the spindle 4. After that, by rotating the change arm 1f 90 degrees to avoid interference with the spindle 4, the system spindle 4 is set to 3.
Cylinder block A1 can be processed.

The clamp mechanism is controlled as follows.

The changeover switch 55 energizes the 3-cylinder cylinder block AI or the 4-cylinder cylinder block A2 to energize relay Xt or relay xI. In the case of excitation of relay X, solenoids 5QL1 to 5OL4 are operated to operate the cylinder devices of each 4S.

In the case of excitation for relay, solenoid SQL, ~SQL,
to operate each of the three cylinder devices.

Also, when performing this automatically, the desired relays X, , X, may be activated arbitrarily by a control relay in a separate electric circuit.

As described in detail above, the present invention provides a change arm 1 that performs vertical movement and turning movement by the operation of the vertical movement and turning mechanism.
The tool 30 installed on the spindle A of the machine tool and the north tool 30 installed on the tool drum 3 are connected to the spindle 4.
And, it is characterized by providing a plurality of storage parts 2 to be gripped when moving toward the tool drum 3 side.

Therefore, the tool 30 can be gripped by moving the change arm l toward the spindle 4, and the tool 30 cannot be gripped by rotating the change arm as in the conventional method, even though a plurality of tools 30 are to be replaced. Any number of tools 30
can be delivered.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams of a conventional tool changer, Figure 3 is a side view of a multi-axis machine tool, Figure 4 is a front view thereof, and Figure 5 is an explanatory diagram of the configuration of an embodiment of the present invention. , FIG. 6 is a view taken from the arrow direction in FIG. 10 is a plan view of a four-cylinder cylinder block, FIG. 11 is a plan view of a three-cylinder cylinder block, and FIG. 12 is an explanatory diagram of a three-cylinder cylinder block stacked on a four-cylinder cylinder block. 1 is change arm, 3 is tool drum, A is spindle k
, AQ is the gripping mechanism. Applicant Komatsu Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Fukumi Figure 4 Figure 8 Figure 9

Claims (1)

[Claims] A change arm 1 that performs vertical and rotational movements by the operation of a vertical rotation mechanism has a nine tool 30 attached to a spindle 4 of a machine tool, and a tool 3 provided on a tool drum 3.
A tool changing device for a multi-axis machine tool, characterized in that a plurality of storage parts 2 are provided for holding a tool 0 when moving it toward a spindle 4 and a tool drum 3.