KR200261176Y1 - Workpiece ejecting apparatus for sub- spindle unit - Google Patents

Abstract

The present invention relates to a workpiece ejector of the sub-spindle configured to separate the locator from the drawbar in the workpiece ejector of the sub-spindle for discharging the workpiece which has been multi-processed.

According to the configuration of the present invention, the drawbar 13 in the draw tube 12 is configured to be movable in the rearward direction in the workpiece ejection apparatus of the sub-spindle to discharge the workpiece chucked to the collet chuck 16,

A detachable locator 14 installed inside the collet chuck 16 so as to protrude outward, and having a coupling pin 14a fixed to the rear thereof;

The rear end is fixed to the drawbar 13, and the front end has a shape structure in which the coupling pin 14a of the detachable locator 14 is selectively attached / detached, and therein, a support state of the detachable locator 14 is supported therein. The locator guide 18 is interposed with a support spring (18b) to be configured.

Description

WORKPIECE EJECTING APPARATUS FOR SUB- SPINDLE UNIT}

The present invention relates to a workpiece ejector of the sub-spindle, and more particularly, to a workpiece ejector of the sub-spindle configured to detach the locator from the drawbar in the workpiece ejector of the sub-spindle for ejecting the workpieces which have been multi-processed. .

In general, NC machine tools, especially multi-tasking lathes, are configured to allow sub-spindles to be moved back and forth in the bed on the same axis for the secondary machining of long-length workpieces, such as long rods, in which the primary work is completed on the main spindle.

As shown in FIG. 1, the conventional sub spindle 100 has a draw tube 120 installed inside the spindle body 110 so as to rotate at a high speed by a power means and a power transmission means not shown in the drawing. Inside the 120, the drawbar 130 in which the locator 140 is installed is displaced to the rear side by a predetermined distance so as to push the workpiece to the front end, and between one side of the drawbar 130 and the fixed side of the rear side. There is an elastic spring 150 for generating a return actuation force of the draw bar 130 is interposed. In addition, the front of the spindle body 110 is configured with a collet chuck 160 for clamping or unclamping the workpiece.

However, in the conventional sub spindle 100 configuration, when the workpiece having a different size is to be processed, it is inevitable to exchange the collet chuck 160 and the locator 140 corresponding to the size of the workpiece to be processed. There was an inconvenience in assembly that needs to be replaced up to the drawbar 130 which fixed 140.

This inconvenience caused a lot of time and manpower in accordance with the replacement work has caused a separate problem that causes a huge obstacle in productivity.

The present invention has been made to solve the above problems, the purpose is to configure the locator to be separated from the drawbar in the workpiece ejector of the sub-spindle for discharging the workpieces of multi-processing is completed without replacing the drawbar By replacing the chuck and the locator, it is possible to correspond to different workpieces with different outer diameters, thereby providing a workpiece discharging device for a sub spindle that minimizes problems in assembly.

In order to achieve the above object, the present invention provides a workpiece dispensing apparatus of a sub spindle for discharging a workpiece chucked to a collet chuck by having a drawbar movable backward in a draw tube.

A detachable locator installed inside the collet chuck so as to protrude to the outside, and having a coupling pin fixed to the rear thereof;

The rear end is fixed to the drawbar, the front end has a shape structure that the coupling pin of the detachable locator is selectively attached / detached, the locator guide is interposed therein support spring for supporting the coupled state of the locator; Has

1 is a side cross-sectional view showing a workpiece discharging device of a conventional sub spindle.

Figure 2 is a side cross-sectional view showing a workpiece discharging device of the sub spindle according to the present invention.

3 is a detailed view of the main part of FIG. 2;

<Explanation of symbols for main parts of drawing>

10: sub spindle, 11: spindle body,

12: drawtube, 13: drawbar,

14: detachable locator, 14a: coupling pin,

15: elastic spring, 16: collet chuck,

18: locator guide, 18a: lock groove,

L: initial entry, L ': entry progress,

L ″: lockend part,

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

Figure 2 is a side cross-sectional view showing a workpiece discharging device of the sub-spindle according to the present invention, Figure 3 is a detail of the main portion of FIG.

In the constitution of the present invention, in the draw tube 12, the draw bar 13 is configured to be movable in the rearward direction, and the work ejection device of the sub spindle for pushing forward the work chucked to the collet chuck 16 forward,

The long-axis workpiece received from the main spindle (not shown) is guided through the collet chuck 16 to enter the draw tube 12, while the finished workpiece is delivered to a separate discharge device (not shown). In order to protrude out of a predetermined length in order to be installed in the interior of the collet chuck 16, the rear side was provided with a separate locator 14, the coupling pin 14a is fixed.

In addition, the rear end is fixed to the drawbar 13, and the opposite side of the front end has a shape structure in which the coupling pin 14a of the detachable locator 14 is selectively attached / detached, and the inside of the detachable locator 14 The locator guide 18 which interposed the support spring 18b which supports the engagement state was comprised.

On the other hand, the removable structure of the locator guide 18 is the initial entry portion (L) for guiding the straight entry of the coupling pin (14a), and is cut at a predetermined angle from the initial entry portion (L) is coupled to the coupling pin (14a) Entry end portion L 'for guiding the rotational movement of the lock and the lock end is cut at a predetermined angle from the entry passage portion L' and the lock end for inducing the coupling pin 14a to be locked by the elastic force of the support spring (18b) It is a lock groove 18a of constant shape having a portion L ″ and the like.

As an example of the shape of the lock groove 18a, the lock groove 18a may be formed in a U-shape, but the shape of the lock groove 18a is not limited thereto.

Referring to the operation of the present invention configured as described above are as follows.

Prior to processing a workpiece such as a bar with long shafts, a collet chuck 16 having an inner diameter that can be chucked in a state in which the diameter of the workpiece is properly accommodated and a locator 14 capable of discharging the workpiece are prepared.

In this state, the locator 14 prepared by the lock groove 18a of the locator guide 18 fixedly installed at the front end of the drawbar 13 is installed. The process is as follows.

When the coupling pin 14a of the locator 14 is pushed into the initial entry portion L of the lock groove 18a, a predetermined straight section proceeds to the rear, and the elastic spring is applied while the internal support spring 18b is pushed.

On the other hand, when the initial entry portion (L) ends, that is, when the coupling pin 14a reaches the start point of the entry progress portion (L ') to move the locator 14 to rotate the state in which elasticity is applied to the support spring (18b) When the coupling pin 14a is guided and reaches the point where the lock end portion L ″ is started, the elastic force of the support spring 18b is reduced to return force and is installed.

Thereafter, when the prepared collet chuck 16 is fixed to the spindle body 11 so that a part of the separate locator 14 protrudes, all preliminary assembly operations for processing are finished.

Since the detaching operation of the detachable locator 11 may be performed in the reverse order, detailed description thereof will be omitted.

By applying the present invention as described above, not only can the exchange of the collet chuck and the locator be easily and promptly changed depending on the size of the workpiece, but also there is no need to replace the drawbar. Consumption can be reduced, and furthermore, it can be expected to improve the performance and stability and productivity of the continuous automatic operation of the NC lathe using the discharge device of the present invention.

Claims (2)

In the draw tube 12, the draw bar 13 is configured to be movable in the rearward direction to discharge the workpiece chucked to the collet chuck 16 in the workpiece ejection apparatus of the sub-spindle, A detachable locator 14 having a collet chuck 16 installed therein so as to protrude to the outside, and a coupling pin 14a fixed to the rear thereof; The rear end is fixed to the drawbar 13, and the front end has a shape structure in which the coupling pin 14a of the detachable locator 14 is selectively attached / detached, and therein, a support state of the detachable locator 14 is supported therein. And a locator guide 18 having a support spring 18b interposed therebetween. According to claim 1, The detachable structure of the locator guide 18 is an initial entry portion (L) for guiding the entry of the coupling pin (14a), the initial entry portion (L) is cut at a predetermined angle and the coupling pin The entry elapsed portion L 'for guiding the rotational movement of the 14a and the incision portion L' are cut at a predetermined angle so that the coupling pin 14a is locked by the elastic force of the support spring 18b. A workpiece discharging device for a sub spindle, characterized in that a leading lock end portion (L ″) is formed.