JPS63288646A - Index device with turning mechanism - Google Patents

Abstract

PURPOSE:To turn a work 90 deg. with a simple turning mechanism by pivot- mounting a base body of a holding means freely rotatably about a pivot shaft attached to a bracket extending from an index table, with the rotary axis of the index table orthogonally intersecting the pivot axis of the holding means. CONSTITUTION:In the case a work 4 is held in an upright condition, its end surface 4a is machined, and the periphery 4b which is diplaced 90 deg. from the end surface 4a is to be machined, the work 4 is turned as described below. An engage-stop pin 26 fixing a base body 10 in a horizontal position is drawn out of a positioning hole 32, a swing arm 25 is turned and the pin 26 is made to engage with a positioning hole 33. As a result, the base body 10 is positioned and fixed and the work 4 is turned 90 deg. as shown with imaginary lines. While the peripheral surface 4b is displaced to a machinable position with a single axis, since the pivot shaft 9, 9a intersects orthogonally the axis S2, S1 of the rotary shaft of an index table 3, the center of the work 4 precisely agrees with the axis S1 and therefore the index work is not inconvenienced.

Description

[Detailed Description of the Invention] Industrial Field of Application This application relates to the rotation of a workpiece attached to the indexing table of an indexing device placed on the processing table of the machine tool when processing a workpiece with a machine tool such as a machining center. Regarding the mechanism, the workpiece can be rotated by 90'' using an extremely simple configuration that does not have a driving source.

Conventional technology and its problems When processing a workpiece with a machine tool such as a machining center, the workpiece is attached to the indexing table of the indexing device,
When the indexing table of the indexing device is rotated by a predetermined angle to index the workpiece to the processing position and processing is performed, and then the processed surface and the surface displaced by 90 degrees are processed using one axis, that is, one main shaft. is the entire indexing device to which the workpiece is attached,
Since this is done by a combination of the so-called A and B axes that are rotated 90 degrees by a separate rotation device, the entire system becomes large in size and requires two drive sources, making it expensive.

Furthermore, since a space is required to rotate the entire indexing device, there is a drawback that the moving distance in the Z-axis direction becomes long.

Means for Solving the Problems The present application relates to an improvement on the conventional device described above, and includes a gripping means for gripping a workpiece attached to a bracket protruding from the indexing table of an indexing device placed and fixed on the processing table of a machine tool. The base body is rotatably attached to a pivot such that the axes of the rotating shafts of the indexing table are orthogonal to each other, and the base body is held at a predetermined position by a positioning pin of a rotating arm attached to the pivot shaft. The above-mentioned conventional method is achieved by a rotating mechanism without a driving source, which rotates the base body by 90 degrees by releasing the positioning pin of the positioning pin and rotating the rotating arm, and then positioning and fixing the base body at the rotating position again. Except for the drawbacks of the device, the turning mechanism is compatible with both manual and automatic operations.

Example Next, the present application will be explained in detail with reference to drawings showing examples.

In FIG. 2, reference numeral 1 denotes a conventionally known indexing device, which is placed and fixed on a machining table 2 of a machine tool (not shown).

Conventionally, the workpiece 4 is indexed by mounting the workpiece on the indexing table 3 by hand or using a pressure fluid device such as a clamp cylinder, and rotating the indexing table 3 by a predetermined angle under program control from a machine tool. The workpiece is then indexed.

In FIGS. 1 and 2, 5 is a gripping device for gripping the workpiece 4, and 6 is a turning mechanism for turning the gripped workpiece 4 by 90 inches. A mounting plate 8 protruding from the mounting plate 8 is removably attached,
The pivots 9, 9 are attached to the bracket 7 of the mounting plate 8 so that the axes S1 and S2 of the rotating shaft of the indexing table 3 are perpendicular to each other.
a is rotatably supported, and one pivot 9 projects outward from the bracket 7. Reference numeral 10 denotes a base body of the gripping device 5, which is fixed to the pivot shafts 9, 9a and rotates together with the pivot shafts 9, 9a, and one side of the base body 10 is open to the front side. A U-shaped workpiece insertion portion 11 is provided. Further, the base body 10 is provided with a means for positioning the work 4 when the work 4 to be gripped has directionality when the work 4 is gripped as described later, but this is not the gist of the present application and will therefore be omitted. .

Next, the gripping body 12 that clamps and grips the workpiece 4 to the workpiece insertion portion 11 is as follows. Reference numeral 13 designates a gripping block, one side of which is cut into a substantially trapezoidal shape to form a gripping surface 14, and a tightening rod 15 having tightening screws 16 with a relatively large pitch carved therein is implanted on the opposite side. Grip body 1 configured in this way
2, the above-mentioned gripping block 13 is loosely engaged with the workpiece insertion part 11, and the tightening rod 15 is passed through the through hole 18 of the base 17 attached to the base 10 so as to cover the opening of the workpiece insertion part 11. A tightening nut 19 having a pair of rotating pieces 20 and 20a is screwed into this protrusion, and a spring 21 is press-fitted between the pedestal 17 and the gripping block 13 to tighten the gripping body 12. By biasing in the direction of gripping the workpiece 4, the tightening nut 19 is always pressed against the base 17, and when the tightening nut 19 is rotated clockwise, the gripping body 12 enters into the workpiece insertion part 11. , and is configured to exit when reversed. Reference numeral 22 designates a regulation pin for regulating the rotation range of the tightening nut 19, which is protruded from the bottom surface of the tightening nut 19 and faces into the regulation groove 23 bored in the base 17; 19 is reliably held in the rotational position.

The turning mechanism 6 is configured as follows. Reference numeral 25 denotes a rotating arm, which is fixed to a portion of the aforementioned pivot 9 that protrudes from the bracket 7, and a positioning pin 26 is attached to the end of the rotating arm. The positioning pin 26 is slidably sealed in a cylindrical body 27 provided on the rotating arm 25, and is biased in the projecting direction by a spring 28 that is press-fitted between the cylindrical body 27 and the positioning pin 26. , a stopper 29 prevents the protrusion beyond a certain limit. A disk 30 is attached to the end of the locking pin 26, and the disk 30 and the stopper 29 allow
A locking portion 31 with a working arm 34 to be described later is provided.

On the other hand, the outer surface of the bracket 7 has first and second position markings 32. centered on the axis S2 of the pivot 9 with an interval of 90@.
33 is drilled, and in the drawing, the locking pin 26 engages with the first position 32, the base 10 of the first gripping device 5 is positioned and fixed in a horizontal position, and the locking pin 26 and the first position 32 are engaged with each other. When the lock pin 26 is opened and the pivot arm 25 is rotated to engage the locking pin 26 with the second position lock 33, the base body 10 is rotated 90' and is positioned and fixed in the upright position.

Finally, a working arm 34 (not shown) is detachably attached to a main shaft 35 of a machine tool, and is provided with a recess 36 that engages with the locking portion 31.

Next, we will explain the operation of the present application, but as mentioned above, this application can be applied to both manual and automatic systems, so we will first explain the manual system, and the movement of the machining table and spindle will differ depending on the type of machine tool. Therefore, in this application, the automated work will be explained assuming that the processing table moves in two directions, X+V, and the main shaft moves only in two directions.

When holding the rotating pieces 20, 20a and turning the tightening nut 19 counterclockwise in FIG. The grip is in a released state, that is, an unclamped state, and the rotation of the tightening nut 19 is regulated by the regulation pin 22 and the regulation groove 23, so that it rotates within an appropriate range with no excess or deficiency, and the rotation position is adjusted by the notch pin 24. is reliably maintained. When the workpiece gripper 12 is unclamped as described above, and then the workpiece 4 is inserted into the workpiece insertion part 11 and the tightening nut 19 is turned counterclockwise, the workpiece gripper 12 that was previously pulled out is removed. enters the workpiece insertion part 11, and the workpiece 4 is firmly gripped in an upright state by the insertion part 11 and the gripping surface 14 of the workpiece gripper 12 (Fig. 2).
. In the clamping and unclamping operations of the workpiece gripping device 5 described above, the workpiece gripping body 12 is urged by the spring 21 and the tightening nut 19 is pressed against the base 17, so that all the constituent members are integrally constructed. The workpiece 4 is firmly connected as shown in FIG. In this embodiment, the workpiece insertion section is U-shaped and the gripping section 14 is approximately trapezoidal, but these may be changed as appropriate depending on the shape of the workpiece.

When the workpiece 4 is gripped in the upright state as described above, the machining table 2 and the main spindle 35 are moved in the predetermined order by X+3'+Z
The end face 4a of the workpiece 4 that is moved and gripped in the direction is processed.

When machining of the workpiece 4 is completed only on the end face 4a, perform the unclamping operation in the same manner as above, take out the workpiece 4, insert the next workpiece 4, clamp it again, and continue the work, but the entire machining is completed. When machining the circumferential surface 4b displaced by 90' from the finished end surface 4a, the workpiece 4 is rotated as follows.

The locking pin 26 that engages with the first position 32 and positions and fixes the base body 10 in the horizontal position in the drawing is moved by the spring 28.
Pull it out from the first position 32 against the force to release the positioning, turn the rotating arm 25 and lock the locking pin 26 into the second positioning hole 3.
3, the base body 10, which was located horizontally in the above, is positioned and fixed in an upright position, and the gripped workpiece 4 is rotated by 90 degrees as shown by the imaginary line in FIG. The circumferential surface 4b is displaced by the shaft to a position where it can be processed, but the axis S2.
Since the relationship with SL is as described above, 9 the gripped workpiece 4
The center of the axis S1 completely coincides with the axis S1, and there is no problem with the indexing operation.

After the rotation is completed in this manner, the indexing table 3 performs the indexing operation, and the machining table 2 and the main shaft 35 move in a predetermined order to perform the machining operation in the same manner as described above. In the above embodiment, all of the constituent elements of the present application are installed on a mounting plate 8 that is detachably attached to the indexing table 3. However, by removing the mounting plate 8, the indexing device 1 can be replaced with the conventional one. It maintains the versatility that can be used for index table 3.
Even if the device is directly attached to the device, the implementation of the present application will not be hindered.

The above description of the operation has been given for the case where all operations are performed manually, but the case where they are performed automatically using the movement of the processing table 2 and the main shaft 35 will be explained. As mentioned above, in this embodiment, the processing table 2 has x,
It is assumed that the main shaft 3 moves only in the Z direction.

Clamping and unclamping of the workpiece 4 is performed as shown in the explanatory diagram of FIG. First, to unclamp the workpiece 4, the processing table 2 is moved in the X+X direction under program control of the machine tool, and the main shaft 35
Then, when the main shaft 35 is lowered (in the Z direction) and the tool 37 detachably attached to the main shaft is used to push down the rotating member 20,
The tightening nut 19 is rotated counterclockwise, and the workpiece 4 is unclamped in the same manner as described above. Also, move the processing table 2 so that the main shaft 35 is directly above the rotating piece 20a on the opposite side, and push down the rotating piece 20a to tighten the tightening nut 1.
9 rotates clockwise to clamp the workpiece 4. In the above, the tool 37 used to push down the rotating piece 20.20a may be the same as the tool 37 used for final machining and attached to the main shaft 35, or a tool held in a magazine (not shown). A tool with a shape suitable for pushing down is selected from among them, and the tool is mounted on the main shaft 35 to perform the work.

Next, the workpiece 4 is rotated by 90° in the following manner. As shown in FIG. 2, when the machining of the end surface 4a of the workpiece 4 held in an upright state is completed, the tool attached to the main shaft 35 is replaced with the working arm 34 held in the magazine. The main shaft 35 is lowered to a height at which the recess 36 can engage with the locking portion 31 of the locking pin 26 (H) in FIG. 31, when the two engage, the processing table 2 is first moved to
1st position baptism 32 by moving to the left side of the direction
The positioning pin 26 that has been locked to is pulled out and the positioning fixation of the gripping device 5 is released. Next, when the main shaft 35 is raised and the locking pin 26 is raised to H1 in FIG. 2, the rotating arm 2
5 rotates to perform a 90" turn, and when the processing table 2 is moved to the right in the opposite direction to the above or moved in the X direction, the positioning pin 26 is locked in the second position 33 and the gripping device 1 is moved. 5 is positioned and fixed at a 90° rotation position.In addition, when rotating from the above rotation position to the first position hole 32, the main shaft 35
All operations are performed in the same manner as described above, except for rotating the rotating arm 25 by moving it downward in the Z direction.

Effects of the Invention As described in detail above, the present application grips a workpiece with a workpiece gripping device provided on an indexing table, and when the workpiece is rotated by 90 degrees after machining of any surface has been completed, there is no need for any drive. By using an extremely simple rotating mechanism that does not require a power source and rotating only the workpiece gripping device, it is small, lightweight, and inexpensive, and not only operates quickly and reliably without requiring complicated control means. This is a useful invention that can be used both manually and automatically, and eliminates the drawbacks of conventional devices.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, in which Fig. 1 is a partially cutaway plan view, Fig. 2 is a side view, Fig. 3 is a sectional view taken along line A-A in Fig. 2, Fig. 4 is an explanatory drawing, and Fig. Figure 5 shows the working arm. 1... Indexing device, 2... Processing table, 3...
- Indexing table, 4... Work, 5... Work gripping device, 6... Turning mechanism, 9, 9a... Pivot, 10... Base, 11... Work gripping part, 25.
... Rotating arm, 26... Locking pin, 28... Spring,
31... Locking portion, 32... First locking hole, 33.
...Second locking hole, 34...Working arm, 35...Tool patent applicant Howa Kogyo Co., Ltd. Figure 3 @ 4 @ Figure 5

Claims (1)

[Claims] 1. In an indexing device that is mounted and fixed on a processing table of a machine tool such as a machining center and that indexes a workpiece attached to the indexing table to a predetermined position, a bracket attached to the indexing table , the base of the workpiece gripping device that grips the workpiece is rotatably pivoted by a pivot such that the axes of the rotational shaft of the indexing table are orthogonal to each other, and a rotating arm is attached to the pivot. The base body is positioned and fixed at a predetermined position by a positioning pin, and the base body is positioned and fixed again at a 90° rotation position by releasing the positioning pin and rotating the rotating arm. Indexing device with. 2. Releasing the positioning and fixing of the base body that is fixed in position by the positioning pin, rotating the rotating arm, and positioning and fixing the base body in the rotation position are performed by the processing table on which the indexing device is placed and fixed, and the main shaft. 2. An indexing device having a turning mechanism according to claim 1, wherein the movement in the x, y, and z directions causes a working arm detachably attached to the main shaft to engage with a positioning pin.