JPS6228370Y2 - - Google Patents

Description

[Detailed explanation of the invention] (1) Industrial application field This invention relates to an automatic reversing device for processing workpieces when machining the front, outside, and outline of box-shaped or rectangular plate-shaped workpieces in machining centers, etc. be.

(2) Conventional technical field When machining the entire circumferential surface of a box-shaped or rectangular plate-shaped workpiece using a machining center, etc., the mounting surface and clamping surface cannot be machined due to interference with the spindle, so it is difficult to machine the workpiece in one time. 3-sided machining is common, and even if interference with the fasteners is avoided, only 5-sided machining is possible at most, and 1
Since the mounting surface and clamping surface of the workpiece cannot be machined during the second setup, it was necessary to change the setup and manually reverse the workpiece and re-tighten it to the fixture.

(3) Problems to be solved by the invention In order to eliminate the above-mentioned drawbacks, the invention provides a sub-table for mounting a rectangular plate-shaped workpiece with a reversing device for mounting the workpiece, thereby solving the first stress. After machining is completed, the workpiece is automatically reversed, and the remaining mounting and clamping surfaces are machined to complete machining on all six sides.The workpiece is characterized by being able to be reversed immediately without moving the sub-table.

(4) Means for solving the problems In order to achieve the above object, the structure of the present invention will be explained using FIGS. 1 to 5 corresponding to the embodiment.
As shown in the figure, an indexing table 8 that can be indexed at a specific angle is equipped with a reversing device in the center of the sub-table 9 centered on lines A and A'.
A' line includes a plurality of bearings 12, supported by the bearings 12,
A gripping arm 17 is fixed onto a rotating shaft 11 shown in FIG. 5 that passes through an intermediate bearing 12, and a gripping tool 2 is swingably mounted via a pin 18. The appearance of the gripping tool 2 is shown in FIG. 4, which shows the relationship between the clamping plate 4 and the gripping tool 2 when the workpiece is clamped by the clamping plate 4 on the top of the sub-table. Since the lower gripping claw 21 is mounted so as to be able to rotate up and down by the pressure spring 15 while being rotated at the center by the pressure spring 15, the gripping tool 2
The upper and lower gripping claws 2 press against the workpiece at the reference plane of
0.21, it is possible to hold and transfer a workpiece vertically.

As shown in FIG. 3, the rotation shaft 11 is extended from the farthest end of the bearing 12, and the workpiece rotation arm 1 is fixed thereto, and a joint tool 14 attached to the tip of the main shaft is inserted into the rotation pin hole 13 at the tip of the rotation shaft 11. are configured so that they are engaged.

(5) Action As shown in Figure 2, the rotation axis A on the sub-table,
After tightening the workpiece downward on line A' and completing front and side machining, attach joint tool 14 to main spindle 5.
The pin 31 is engaged with the rotation pin hole 13, and the gripping tool 2 is rotated by the vertical and horizontal combined movements of the main shaft 5 according to commands from the numerical control device of the machine tool, and the gripping tool 2 is pressed against the gripping tool 2. and upper and lower gripping claws 2
Grip at 0, 20, and after gripping, lateral clamping plate 3
Release the clamp, rotate the workpiece rotation arm 1 in the opposite direction to the above, press the workpiece mounting surface of the sub-table above lines A and A' with the gripping tool 2, automatically clamp it with the clamping plate 4, and reverse it. is completed and the next process begins.

Note that the gripping tool 2 is held in the state shown in FIG. 4 during processing.

(6) Embodiment Figure 1 shows an overall view of a sub-table 9 equipped with a machining center to hold a workpiece and a six-sided automatic machining device. A six-sided automatic processing device is constructed by equipping a sub-table 9 with the above-mentioned reversing device on an indexing table 8 having a polygonal shape that can be indexed at a specific angle.

A plurality of box-shaped or rectangular plate-shaped workpieces 100, 101, and 102 having the same shape are clamped (by pneumatic or hydraulic pressure, etc.) under the reversing device on the sub-table by the clamping plate 3 as shown in the figure. Fit an appropriate cutting tool onto the main shaft 5, and
Process the e and f surfaces. After the machining is completed, the main shaft 5 retreats, the joint tool 14 is fitted, the pin 31 engages with the rotation pin hole 13 of the workpiece rotation arm 1, and the rotation shaft 11 is rotated according to a command from the numerical control device. By doing so, the gripper 2 is brought into pressure contact with the surface of the workpiece e, and the upper and lower gripping claws 20 and 21
After gripping and gripping the surface, the clamp of the clamping plate 3 is released and the movement of the workpiece rotation and gripping arm 1 is instructed in the completely opposite direction, thereby moving the workpieces shown in FIGS. 2 and 4 on the upper part of the sub-table. Pressed to the mounting surface,
Thereafter, it is firmly fixed to the mounting surface and the reference surface by the clamping plate 4, and the workpiece gripping arm 1 remains on standby at that position, completing the reversal of the workpiece and moving on to the next processing as described above. .

(7) Effects of the invention When using this invention to perform six-sided machining of a box-shaped or rectangular plate-shaped workpiece using a machining center in unmanned operation, the machining center had to be stopped in the middle of machining in order to reinstall the workpiece. This device enables automatic reversal machining, greatly improving machine operating time.

In this example, only one side of the indexing table is equipped with a 6-sided automatic processing device, but since the table is multifaceted and can index at a specific angle, each side is equipped with a 6-sided automatic processing device. Of course, by installing it, the operating rate of the machining center will be further improved.

[Brief explanation of the drawing]

FIG. 1 shows a state in which an indexing table placed on a main table is equipped with a six-sided automatic processing device. FIG. 2 shows the relationship in which workpieces are attached to the lower and upper parts of the sub-table 9. FIG. 3 shows the rotating arm 1 for swinging the rotating shaft 11.
shows a relationship diagram in which the joint tool 14 is engaged. FIG. 4 shows how a workpiece is attached to the upper part of the sub-table 9 and how the workpiece gripping arm 2 is evacuated.
Figure 5 shows the workpiece being gripped by the workpiece gripping arm 2.
This shows the clamping state of the workpiece when it is reversed. 1: Workpiece rotating arm, 2: Workpiece gripping arm, 3: Clamping plate (horizontal direction), 4: Clamping plate (vertical direction),
5: Machining center main shaft, 6: Indexing table rotating equipment, 7: Indexing axis, 8: Indexing table, 9: Sub table, 11: Rotating axis, 12:
Rotating shaft bearing, 13: Rotating pin hole, 14: Joint tool, 15: Pressing spring, 16: Swinging pin, 17: Gripping arm, 18: Pin, 20: Upper gripping claw, 21: Lower gripping Claw, 22: Guide pin, 3
1: Joint tool pin, 60: Main table, 100, 101, 102: Work.

Claims (1)

[Scope of utility model registration request] Regarding a machine tool equipped with an indexable polygonal indexing table with an indexing axis placed perpendicular to the main axis on the main table of the machine tool in six-sided machining of a box-shaped or rectangular plate-shaped workpiece,
The sub-table is fixed to the indexing table with the center line of the sub-table arranged parallel to the indexing axis of the indexing table, and a reference plane and a clamping plate device for clamping the workpiece are provided below the center line. A workpiece mounting surface and a clamping plate device are arranged on the upper part of the sub-table at a position for reversing the workpiece attached to the lower part with respect to the center line, and the reversing device is supported along the center line. A bearing is fixed on the center line of the sub-table, a rotating shaft passes through the bearing, and a gripping tool, a gripping arm, and an upper gripping device are provided for inverting and receiving the workpiece on the rotating shaft between the bearings. The claw and the lower gripping claw are elastically attached so as to be able to press the workpiece, the end of the rotating shaft of the bearing is extended and the workpiece rotation arm is attached,
A six-sided automatic processing device for processing box-shaped or rectangular plate-shaped workpieces by engaging a joint tool fitted to the main shaft and flipping the workpiece from the bottom to the top.