JPH065070Y2 - Tool magazine device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a magazine device suitable for a machining center having a small number of tools.

Conventional technology Magazines with a small number of tools are generally arranged on concentric circles and indexed. In this case, the tool exchange arm, sub arm, and ready station that holds the tool at the intermediate position are not equipped, but the tool is exchanged by using the movement of the spindle head and the spindle, and the method of directly mounting or removing from the magazine is adopted. ing.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a configuration, generally, the final indexing of the magazine and the unlocking of the gripper are mechanical or hydraulic, and are performed in different operations according to a sequence. There is a problem that the number of components is increased and the time is increased.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a tool magazine device in which the operation sequence is reduced and the components are simplified. .

Means for Solving the Problems In order to achieve the above-mentioned object, a tool magazine device of the present invention comprises an indexable tool magazine and a turning center of the turning center of the tool magazine concentric with the turning axis of the tool magazine. A plurality of grippers that are provided in parallel with each other and that can be inserted / removed by movement of the tool in a direction perpendicular to the pivot axis, and a pair of swinging open / close gripping claws; A positioning taper hole is provided at the end of the dividing line and has a step in the center to move in the axial direction to lock and unlock the opening and closing of the gripping claw at the step, and the spring is normally held in a locked state. The positioning member at the indexing position and the indexing pin at the tip of the piston rod, which is provided on the support of the tool magazine corresponding to the positioning member at the tool replacement position, are inserted into the positioning taper hole to guide the positioning. A fluid pressure cylinder member that positions the ripper to the final indexing position and sets the positioning member to the unlocked position is used to perform the final indexing of the tool magazine and the unlocking of the gripper in one operation.

Action When the magazine is indexed, the fluid pressure cylinder acts and the indexing pin rises to fit into the tapered hole of the indexing shaft for final positioning of the gripper. Located in between to unlock the gripper.

Example Hereinafter, description will be given with reference to FIGS. 1, 2, and 3. A table 2 is placed on the bed 1 so as to be movable in the X-axis direction, columns 3 are established on the left and right side surfaces of the bed 1, and a cross rail 4 forms a gate shape. A saddle 5 is moved and positioned on the horizontal guide surface on the front surface of the cross rail 4 in the horizontal Y-axis direction on the guide surface by a motor and a feed screw (not shown). A ram 7 is rotatably supported on the saddle 5 and is movably positioned in the vertical Z-axis direction. The magazine 8 protected by a cover opened by a cam (not shown) when the saddle 5 approaches within the Y-axis positioning range of the ram 7 on the front surface of the column 3 is rotated and indexed by a motor (not shown) around the vertical axis. It is provided. The turning center of the magazine 8 is located on the Y-axis movement line of the center of the main shaft 6 of the saddle 5.

In the magazine 8, a gripper mounting plate 10 with a cover is fixed to the upper surface of a rotary shaft 9 that is rotatably indexed and supported by a magazine support (not shown), and the grippers 11 are radially arranged at equal angular positions on the same circumference. The grip portion is arranged in a protruding state. The gripper 11 has an arcuate gripping surface 12a.
Is made up of a pair of gripping claws 12 opposed to each other, and is pivotally supported by a small shaft 13 at about the center of each arm,
A spring 1 interposed between the arms on the opposite side of the arcuate gripping surface 12a.
At 4, the gripper is closed and biased. The gripper mounting plate 10 is provided with a hole parallel to the swivel shaft 9 at an intermediate position between the two gripping claws 12 closer to the end than the spring 14 of each gripper 11, and the bottom surface of the gripper mounting plate 10 is formed with this hole. A bracket 15 having a center hole is concentrically fixed, and a stopper 16 having a guide center hole is also fixed to the upper surface concentrically with the bracket 15. And bracket 15
The indexing shaft 17 is inserted through the hole of the stopper 16.

This indexing shaft 17 has a tapered hole 17a for positioning at the lower end.
Is formed, and a small diameter portion 17b that is in an unlocked state that does not interfere with the opening of the gripping surface 12a at the raised position of the indexing shaft 17 is cut in the substantially central portion, and the upper portion thereof is gripped at the lowering position of the indexing shaft 17. A large-diameter portion 17c that locks the surface 12a in a tool-holding state is provided, and a nut 18 that contacts the stopper 16 that determines the descending end is screwed onto the upper end. Furthermore, a spring 19 for constantly urging the indexing shaft 17 in the descending direction is interposed between the end of the bracket 15 and the lower end flange of the indexing shaft 17. A key 20 for positioning the gripping tool of the gripper 11 is fixed between the pair of gripping claws 12.

The magazine is not limited to the one in which the grippers are arranged on the circumference, and can be applied to other types. The tool changing position of the magazine 8, that is, the saddle 5 is moved leftward in FIG. 3, and the tool of the spindle 6 is gripped on the gripping surface 12a from the tip opening of the gripper 11.
Indexing shaft 17 of gripper 11 at a position where it can be inserted into
A fluid pressure cylinder 21 is vertically provided directly below the magazine support on a magazine support (not shown). An indexing pin 23 having a tapered end that fits into the tapered hole of the indexing shaft 17 is fixed to the end of the piston rod 22 protruding above the fluid pressure cylinder 21.

In the magazine 8, the tools T stored in the other grippers except one of the grippers 11 are gripped by the grip surface 12a of the grip claw 12 in the grip groove Tb with the taper shank Ta as the upper side, and the empty gripper 11 is the main shaft. 6 is indexed to the tool exchange position opposite to 6. It is assumed that the indexing pin 23 is lifted into the indexed taper hole 17a of the indexing shaft 17 for fitting and positioning, and the small diameter portion 17b is located between the gripping claws 12 and is in an unlocked state.

A tool replacement command for the spindle 6 is issued, the ram 7 is raised to the replacement position, and the spindle 6 is indexed. The saddle 5 is moved leftward and is positioned at the tool exchange position on the magazine 8. At this time, the cam opens the protective cover of the magazine. The tool T mounted on the spindle 6 is inserted by the grip groove Tb by pushing the grip claw 12 against the force of the spring 14 and opening the grip claw Tb in front of the leftward end, and is fitted and positioned by the key 20. The pressure oil supply direction of the fluid pressure cylinder 21 is switched to lower the indexing pin 23. The indexing shaft 17 is lowered by the force of the spring 19 so that the nut 18 stops.
And the large diameter portion 17c is inserted between the grip claws 12 and the gripper 11 is locked. In parallel with the above operation, the spindle 6
The tool T of is unclamped, and the ram 7 rises and comes out of the taper shank Ta.

When the magazine 8 is indexed by the command and the exchange tool T is indexed, the pressure oil supply direction of the fluid pressure cylinder 21 is switched by the indexing completion signal, and the indexing pin 23 rises to fit into the indexing taper hole. At the same time, the indexing shaft 17 is moved up to be accurately positioned with respect to the magazine 8, and the small diameter portion 17b is brought to the position of the grip claw 12 to unlock the gripper 11. The ram 7 descends and the taper shank Ta of the tool T enters the taper hole.
Is loaded and clamped on the main shaft 6. The saddle 5 is moved to the right, and the tool T mounted on the main shaft 6 forcibly opens the gripping claw 12 of the unlocked gripper 11 and is taken out to complete the tool exchange.

Effects Since the present invention is configured as described above, it has the following effects. The final indexing of the magazine and the release of the gripping claws can now be performed in one operation. Therefore, one sequence of the exchange operation is reduced, the tool exchange time is shortened, the constituent parts are simplified, and the work efficiency and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of the magazine replacement position of the present invention at the gripper indexing shaft position, FIG. 2 is a plan view of the magazine with a partial cross section, and FIG. 3 is a front view of a machining center. 5 ... Saddle, 6 ... Spindle 7 ... Ram, 8 ... Magazine 11 ... Gripper, 12 ... Gripping claw 14 ... Spring, 17 ... Indexing shaft 21 ... Fluid pressure cylinder 23 ... Indexing pin

Claims (1)

[Scope of utility model registration request] 1. A tool magazine that can be indexed, and a large number of gripping centers are provided parallel to the swivel axis at equiangular positions concentric with the swivel axis of the tool magazine and inserted by movement of the tool in a direction perpendicular to the swivel axis. A pair of removable gripper claws that open and close by swinging; a gripper of each gripper of the gripper and a taper hole for positioning the end and a central step provided on the bisector on the opposite side. Positioning member at the indexing position that locks and unlocks the opening and closing of the gripping claw at a step by moving in the axial direction and is normally held in a locked state by a spring, and a tool replacement position on the support of the tool magazine The indexing pin at the tip of the piston rod, which is provided corresponding to the positioning member, fits into the positioning taper hole to position the gripper at the final indexing position, and the positioning member is removed. Tsu comprises a fluid pressure cylinder member to click position, the tool magazine device which is characterized in that the unlocking of the final indexing and gripper of the tool magazine 1 operation.