JPS5811456Y2 - Rotary type collet chuck - Google Patents

Description

[Detailed explanation of the invention] This invention is based on the following methods:
This invention relates to a rotary set collet chuck for clamping a workpiece.

Conventionally, when a workpiece is machined using a machine tool, a collet chuck has been used to clamp the workpiece.

This collet chuck is disposed below the head of the machine tool so as to be coaxial with the head of the machine tool.

When processing a workpiece, the workpiece is inserted into the collet body and clamped with the head of the machine tool raised, and then the workpiece is machined by lowering the head of the machine tool.

After machining, the head of the machine tool is raised to release the clamping force on the machined workpiece, and then the workpiece after machining is taken out, and the new workpiece to be machined is inserted into the collet body and clamped, and the machining begins. The machine head is lowered again to process the workpiece.

Therefore, it takes a considerable amount of time from the end of machining to the start of the next machining.

For this reason, it is extremely inefficient to process a large number of workpieces.

This invention eliminates such drawbacks.

An embodiment of this invention will be described below with reference to the drawings.

A circular collet table 1 is provided so as to be intermittently rotatable by a rotating device 2, and a plurality of collets 3 are arranged on the table 1 on the same circumference, and one of the collets 3 is the same as the head 39 of the machine tool. The table 1 is arranged below the head 39 of the machine tool so as to be located on the axis, and the workpieces inserted into the collets 3 are placed on the head 39 of the machine tool.
A clamping device 4 for clamping at position 9 is attached to the table 1.
It is arranged at the bottom of the.

That is, to explain in detail the rotating device 2 for intermittently rotating the circular collet table 1, the upper base 7 is attached to the upper part of the lower base 6 disposed on the frame base 5 by a plurality of mounting bolts 8. A master 11 having a plurality of notches 10 and a guide plate 12 are respectively supported on the main shaft 9 which is attached and vertically provided in the center of the lower base 6. A rotatably mounted drive table 13 and a master 11 are connected by a plurality of connecting bolts 14.

Notch 1 for intermittently rotating the master 11
0 is pivotally supported by a front guide shaft 16, and a guide plate 12 is pivotally supported under the front guide shaft 16.
5 is always urged to rotate in the direction of the hour hand by a spring (not shown) so that it always comes into contact with the peripheral surface of the master 11.

The front guide shaft 16 is rotatably supported by a rear guide shaft 18 via connecting plates 17 provided above and below, and the rear guide shaft 18 is arranged so as to face the opening 19 of the lower pace. It is fixed to the piston rod of the cylinder 20.

Further, a stopper 21 is installed in the lower base 6 to suppress movement of the claw 15 in order to rotate the master 11 intermittently.

Note that 40 is an elastic stopper for preventing the master 11 from reversing.

The collet table 1 is mounted on the drive table 13 with a plurality of mounting bolts 22, and the collet table 1 has a plurality of collets 3 arranged on the same circumference.

The structure of each of the collets 3 is such that a collet body 24 with a retracting fitting 23 screwed onto the lower end is fitted inside the collet holder 25 so that it can move up and down a little.
5 is provided passing through the collet table 1 and is fixed to the collet table 1 with a holder presser 26 and a mounting bolt 27.

Next, the clamping device 4 for clamping the workpiece within the collet body will be described in detail. It is provided by penetrating the plate 30 so as to be vertically movable,
A support pin 32 is attached to a retraction bracket 31 screwed onto the lower end of the retraction shaft 28.

The bent portion at the tip of the arm 33 is the frame base 5.
The arm 33 is pivotally supported by an arm bearing 34 disposed above, a U-shaped ring 35 at the tip of the arm 33 is engaged with the support pin 32, and a U-shaped ring 36 at the rear end of the arm 33 is connected to the frame base 5. It is engaged with a support pin 38 attached to a piston rod of a cylinder 37 vertically installed above.

Note that the above-mentioned rotating device 2 and clamping device 4 are just examples,
It is not particularly limited to the above structure.

Further, when the number of collets 3 disposed on the collet table 1 is, for example, six as shown in the drawing, one rotation operation of the collet table is configured such that the rotation device 2 rotates the collet table by 60 degrees. .

Next, to explain the operation of the rotary complete collet chuck, first, a workpiece is inserted into each collet body 24, and then the clamping device 4 is operated to move the workpiece located at the head 39 of the machine tool into the collet body 24. Hold it in place.

That is, when the cylinder 37 is operated to lower the tip of the arm 33, the retraction shaft 28 is lowered, and the retraction fitting 23 that is engaged with the retraction shaft 28 is lowered, whereby the collet body 24 is moved into the collet holder 25. The workpiece is clamped as it descends inside.

Then, the head 39 of the machine tool is lowered to machine the workpiece, and when the machining is finished, the cylinder 37 is operated in the opposite direction to the above, and the collet body 24 is raised to its original position to increase the clamping force on the workpiece. Open.

Thereafter, the rotating device 2 is operated to rotate the collet table 1 by a predetermined angle.

That is, the cylinder 20 is operated to advance the pawl 15 to the position shown by the imaginary line in FIG.
When the cylinder 20 is operated in the opposite direction and the pawl 15 is moved backward, the master 11 rotates in the direction of the hour hand, and thereby the collet table 1 also rotates.

When the claw 15 retreats to the stopper 21, the movement of the claw 15 is stopped, the rotation of the collet table 1 is also stopped, and the next workpiece to be machined is fed into the center of the head 39 of the machine tool. In addition, the workpiece after machining is placed at the head 39 of the machine tool.
It is sent out from the center.

When the workpiece is fed into the center of the head 39 of the machine tool, the retraction fitting 23 at the bottom of the collet body engages with the retraction shaft 28 of the clamping device, and the workpiece is clamped by the clamping device 4 in the same manner as described above. After that, it is processed.

During this time, the processed workpiece is taken out from the collet body 24, and the workpiece to be machined is newly inserted into the collet body 24.

Then, once the processing of the workpiece that is currently being processed is completed,
The collet table 1 is again rotated by the rotation device 2.

By repeating the above operations, a large amount of workpieces can be processed.

As mentioned above, the workpiece after machining is sent out from the machine tool position and then taken out from the collet body, the workpiece to be machined is newly set in this collet body, and it is simply transported to the machine tool position. The workpiece to be processed is sent there.

Therefore, there is no need to replace the workpiece after processing with the workpiece to be machined next at the machine tool location, so the work can be done very efficiently when processing a large number of workpieces. .

Further, it has the advantage that processing can be performed without centering the workpiece and the head of the machine tool.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of this invention, Fig. 2 is a longitudinal sectional front view of the main part taken along the line II-II, Fig. 3 is a longitudinal sectional side view of the main part taken along the line III-III of Fig. FIG. 4 is a plan view of FIG. 1 with the upper base removed. In the diagram: 1...collet table, 2...
・Rotating device, 3...collet, 4...
Clamping device, 39... Machine tool head.

Claims (1)

[Scope of utility model registration request] A rotating device 2 is connected to the master, in which a master having notches corresponding to the number of collets is fixed to a main shaft that is pivotally supported on a base, and a guide shaft having a pawl that fits into the notches is attached to the piston rod of the cylinder. A circular collet table 1 is intermittently rotatable by a cylinder of a rotating device, and the collet table 1 is arranged at equal intervals on the same circumference of the table, and when the table is rotated, a retraction shaft of a clamping device is inserted in a fixed manner. A plurality of collets 3 have retracting fittings vertically attached to the lower end of the collet body, and one end of an arm that is pivotally supported on the base engages with the piston rod of the cylinder, and the other end has a retracting shaft that projects vertically. It consists of a clamping device 4 that engages a retracting fitting that rotates a moving retracting shaft, pulls down the collet body, and clamps the workpiece to the collet. A rotary complete collet chuck with a retraction shaft of device 4.