JPH0634883Y2 - Workpiece unloading device for machine tools - Google Patents

Description

TECHNICAL FIELD The present invention relates to a workpiece unloading device for unloading a workpiece out of the machine. The present invention has, in particular, at least two main shafts, one or both of the main shafts being able to move back and forth relatively in the direction of the axis of rotation of the main shafts, and one main shaft via the relative movement of the main shafts. The present invention relates to a workpiece unloading device used in a machine tool for delivering a primary workpiece processed in (1) to the other spindle and performing secondary processing of a portion of the workpiece that contacts the back side.

2. Description of the Related Art Conventionally, in this type of machine tool, the machine configuration is designed to finish a finished product with a single machine, and a workpiece unloading device for unloading the finished product is used for secondary machining. It is provided in a position near the hitting spindle, and is not normally attached to the spindle on the primary processing side. That is, in this type of machine tool, a material feeder is provided behind one of the spindles, a long material is supplied to the machining area from behind the spindle, and after the final parting of the primary machining on one spindle, After the other spindle moves forward and grips the workpiece, secondary machining is started. The other spindle is machined at a position relatively distant from the one spindle, and the workpiece is finished. Is carried out at this position. This is 2
When machining with the spindle on the secondary machining side, while the material is supplied on the primary spindle side on the other side, to eliminate idle time as much as possible and to avoid interference between both spindles, the spindle on the secondary machining side should be used. This is because it is more preferable and practical to provide the workpiece unloading device at a position near the position.

As described above, when unloading a finished product from the machine, it is ideal to provide a unloading device at a position near the spindle, which is the secondary processing side. There is a case where it is unavoidable to use only to perform only the primary processing. For example, in a situation where the amount of work is reduced due to economic fluctuations in the market and the choice of work is limited,
In some cases, only primary processing is performed, and the efficiency of the machine naturally tends to decrease. In such a case, another unloading device must be provided in addition to the unloading device provided on the main spindle on the secondary processing side. As described above, this is post-construction work after the delivery of the machine, and the user may have to stop the machine and interrupt the work. In addition, this is a large-scale construction work and the financial outlay is immeasurable.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a low-cost work-piece unloading device that facilitates attachment of the device.

Means for Solving the Problems In the present invention, a workpiece unloading device is provided on a spindle on the secondary processing side. Specifically, it is a container having a handle portion, and the handle portion of the container is processed on the spindle. The workpiece is fixed via the object gripping portion, and the workpiece stored in the container is inverted in the carry-out area and carried out of the machine through the action of the orientation of the main shaft.

Embodiment Hereinafter, the present invention will be described based on an embodiment.

1 is a machine tool for turning, at least
Two or more spindles 3 rotatably supported on the spindle stocks 2a and 2b
It has a and 3b. One main shaft 3a can be moved toward or away from the other main shaft 3b, or both main shafts 3a and 3b can be relatively supported in the main shaft feed table in the main shaft rotation axis direction. Both spindles 3a and 3b can be set to arbitrary rotational speeds, and a spindle motor having an orientation mechanism for stopping the spindle at a fixed position at a specific rotation angle is used. Based on a numerical command, the spindle feed table is driven by a servo motor to control the feed operation via a ball screw.
At least one of the main shafts 3a and 3b is hollow, and behind the main shaft 3a is provided a material feeder that feeds a long bar through a hollow main shaft hole to a processing region. Chucks 4a and 4b, which face each other and support the workpiece, are provided on both the spindles 3a and 3b.
Is installed. Reference numeral 5 denotes a tool feed table, which is capable of performing a feed operation in the main shaft rotation axis direction and a direction orthogonal to the rotation axis line in the machining area. Similar to the spindle feed table, the tool feed table 5 is driven by a servomotor to perform a feeding operation via a ball screw based on a numerical command. The material sent to the machining area through the spindle hole of one of the spindles 3a via the material feeder is gripped by the chuck 4a, and then the primary machining is started via the tool feed table 5, and the final machining of the primary machining is performed. Just before parting off,
The other main spindle 3b advances toward the one main spindle 3a on the primary side,
After gripping the processed portion via the chuck 4b, both spindles 3a and 3b rotate at the same number of revolutions, and the cut-off processing ends.
After the cut-off, the workpiece transferred to the other spindle 3b is again subjected to the secondary machining on the back side of the workpiece via the tool feed table 5. When all the steps of machining on the other spindle 3b are completed, the workpiece unloading device 6 provided on the other spindle 3b side is activated, and enters the machining area from the side surface of the chuck 4b of the spindle 3b,
When the chuck 4b is opened, the workpiece is released and falls into the container for receiving the workpiece provided in the above apparatus, and then is discharged to the discharge area. From the operation shown here, the use mode is inevitably determined from the configuration of the machine tool shown in the present invention. However, in the work process of unloading the workpiece, the workpiece unloading device It is more rational to mount it on the back side of the workpiece closer to the other spindle 3b side for secondary machining than to provide it on the spindle 3a side of the primary machining side. That is,
When the final parting work is completed on the spindle 3a on the primary processing side,
Since the material is newly supplied to the machining area via the material supply machine, the spindle 3b on the secondary machining side should be kept away from one spindle in order to avoid interference with the new material supplied to the machining area. Must be processed on the secondary side of the work piece. Moreover, since the finished product is finished by secondary machining, it is better to set the workpiece carry-out area on the other spindle 3b side of the secondary side and equip the workpiece carry-out device here to the spindle 3a on the primary machining side. Since the work is carried out in parallel with the material feeding process, the idle time of machine operation can be reduced. However, when considering the processing of the finished product on one of the spindles 3a, in consideration of the above, it is better to install the workpiece unloading device at a position near the spindle 3a on the primary processing side. Providing two of the above-mentioned devices on both of the main spindles 3a and 3b on the secondary processing side will lead to high economic cost.
In addition, production may be interrupted in the case of post-construction work. In the present invention, it is an object of the present invention to provide a unloading device which can easily carry out the unloading of the work piece on the main spindle 3b on the primary working side in consideration of the above-mentioned usage mode and which is inexpensive.

Hereinafter, description will be given with reference to the drawings.

Reference numeral 7 denotes a workpiece unloading container capable of receiving a workpiece from the front side of the main spindle 3a on the primary processing side, the upper part of which is open. The container 7 is provided with a rod-shaped handle portion 8 that extends horizontally with respect to the upper open surface. The handle 8 has an outer diameter equal to the diameter of the chuck 4b of the main shaft 3b on the secondary processing side, and can be gripped via the chuck 4b of the main shaft 3b. In the case where it is only necessary to take the workpiece processed only by the spindle 3a on the primary processing side, the handle portion 8 of the workpiece unloading container 7 is previously inserted and mounted in the chuck 4b of the spindle 3b on the secondary processing side, Hold it through the clamp of the chuck 4b. When the workpiece processed by the spindle 3a on the primary processing side is carried out of the machine, the spindle 3b on the secondary processing side faces the one spindle 3a on the primary processing side, and the position where the workpiece can be received. Move forward to and stop. When the parting work on the spindle 3a on the primary processing side is completed, the workpiece falls into the workpiece unloading container that has been waiting immediately below the workpiece, and the container 7
It is stored inside. After that, when the main spindle 3b on the secondary machining side is retracted and stopped in the machining area on the secondary machining side, the rotation is stopped at a rotation angle for seeing the fall of the workpiece from the container 7 via the orientation mechanism of the main spindle 3b. Through this operation, the workpiece is carried out of the machine from the conveyor or chute arranged in the carry-out area. The function of orientation of the spindle 3b is to control the rotation angle position of the spindle 3b by comparing a specific rotation angle with a specific rotation angle and controlling the rotation angle position of the spindle 3b directly. It is also possible to control the rotation angle with an AC motor with the interposition of.

From the above, the workpiece can be carried out in the present invention by making the main shaft hold the handle portion side of the workpiece carrying container that constitutes a simple container,
The device can be carried out by inverting it from the container through the orientation mechanism of the main shaft, and it is possible to provide a device that is extremely inexpensive to install and economical. 9
Is a processed product.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, and FIG. 2 is a partially sectional front view showing a workpiece unloading container held on one side of a spindle.
FIG. 3 is a vertical cross-sectional view showing a partial cross section in FIG. 2, and FIG. 4 is an implementation view showing a conventional example. 3a, 3b ... Spindle, 4a, 4b ... Chuck, 7 ... Workpiece discharge container

Claims (1)

[Scope of utility model registration request] 1. The other main spindle 3b is supported by one main spindle 3a, or both main spindles 3a, 3b are supported by a main spindle feed table so as to relatively move toward and away from each other in the main spindle rotation axis direction. In a possible machine tool, one of the spindles 3a and 3b holds the workpiece unloading container 7, and the workpiece unloading container 7 is turned over by controlling the orientation of the spindle, so that the workpiece is unloaded from the processing area. A work-piece unloading device for machine tools.