JP7412255B2 - Work collection device - Google Patents

Description

The present invention relates to a work collection device.

2. Description of the Related Art Workpiece recovery devices that recover workpieces processed by machine tools are known. For example, a lathe device that is provided with a cut-off workpiece receiving portion has been proposed (see, for example, Patent Document 1). This cut-off workpiece receiving portion is attached to a tailstock shaft that supports the workpiece and is disposed opposite to a main shaft that grips and rotates the workpiece.

Publication No. 52-075887

However, if a structure is adopted in which the tool that processes the workpiece gripped by the spindle moves together with the tailstock spindle, when the tool approaches the workpiece gripped by the spindle for machining, etc. It is possible that the parting workpiece receiver interferes with the spindle side.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a workpiece recovery device that can appropriately adjust the protruding length of a receiving portion for receiving a workpiece.

The present invention provides a work collection device in which a receiving part for receiving a work gripped by a first main shaft is connected to a second main shaft disposed opposite to the first main shaft, and the receiving part is connected to the receiving part. The workpiece recovery device includes a pipe material provided inside the second main shaft, and a moving part that moves the pipe material in a direction parallel to the axis of the second main shaft, The work collection device adjusts the protruding length of the receiving portion from the tip of the second main shaft by moving the tube material.

According to the work collection device according to the present invention, the protruding length of the receiving portion for receiving the work can be adjusted as appropriate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view showing an automatic lathe including a back spindle having a work collection device according to an embodiment of the present invention. FIG. 3 is a plan view of a front main spindle, a back main spindle, etc. provided inside the automatic lathe. FIG. 3 is a cross-sectional view taken along a vertical plane including the axis of the back main shaft having a workpiece collecting device, showing a state in which the workpiece collecting device is elongated. FIG. 3 is a perspective view showing a workpiece collector protruding from the tip of the back main shaft. FIG. 3 is a cross-sectional view taken along a vertical plane including the axis of a back main shaft having a workpiece collecting device, showing a state in which the workpiece collecting device protrudes briefly. FIG. 3 is a plan view corresponding to FIG. 2 illustrating a state in which the back main shaft is close to the front main shaft and the workpiece collector can receive a workpiece. FIG. 3 is a plan view corresponding to FIG. 2 illustrating a state in which a workpiece has been cut off and received by a receiving portion of a workpiece recovery device. FIG. 3 is a plan view corresponding to FIG. 2 showing a state in which a receiving portion with a long protruding length abuts against the side of the front spindle when processing a work gripped by the front spindle with a tool on the back spindle tool rest. FIG. 3 is a plan view corresponding to FIG. 2 showing a state in which a receiving portion with a short protruding length does not abut against the side of the front spindle when processing a work gripped by the front spindle with a tool on the back spindle tool rest.

Hereinafter, embodiments of a work collection device according to the present invention will be described.

FIG. 1 is an external view showing an automatic lathe 100 including a back main spindle 200 having a work collection device 1 according to an embodiment of the present invention, and FIG. 2 shows a front main spindle 300, a back main spindle 200, etc. provided inside the automatic lathe 100. FIG.

3 is a cross-sectional view taken along a vertical plane including the axis C1 of the back main spindle 200 having the work collecting device 1, showing a state where the work collecting device 10 is long protruding, and FIG. 4 shows the tip of the back main spindle 200. FIG. 5 is a cross-sectional view taken along a vertical plane including the axis C1 of the back main shaft 200 having the workpiece collecting device 1, with the workpiece collecting device 10 protruding short. shows.

(composition)
As shown in FIG. 2, an automatic lathe 100 (see FIG. 1) including a back spindle 200 (an example of a second spindle) having a work collection device 1 that is an embodiment of the present invention has a front spindle 300 (an example of a second spindle). (an example) has a back main shaft 200 disposed opposite to the main shaft 200.

The front main shaft 300 grips the workpiece W, rotates around the axis C2, and processes the workpiece W by pressing a tool (not shown) against the workpiece W.

The back main spindle 200 receives the workpiece W processed by the front main spindle 300 and separated from the front main spindle 300 by cut-off processing, and processes the area of the cut-off workpiece W on the front main spindle 300 side. The processing of the workpiece W held by the back main spindle 200 may be performed in parallel or in conjunction with the processing of the workpiece W held by the front main spindle 300, or may be performed independently from the processing by the front main spindle 300. Good too.

Note that the back main spindle 200 shown in FIG. 2 is equipped with the workpiece collector 10 and cannot grip the workpiece W as described above, but the workpiece collector 10 can be attached to and detached from the back main spindle 200. With the workpiece collector 10 removed from the back main spindle 200, the back main spindle 200 can grip and process the work W.

As shown in FIG. 2, the automatic lathe 100 is provided with a back spindle tool stand 280 adjacent to the back spindle 200, which is equipped with tools 281 and 282 for machining a workpiece W held by the front spindle 300. It is being The back spindle tool stand 280 is installed on the back spindle 290 where the back spindle 200 is installed. Therefore, the back spindle 200 and the back spindle tool stand 280 move together.

As shown in FIG. 3, the work collection device 1 includes a work collection device 10 and a push rod 220 as a moving section. The push rod 220 is provided in advance on the back main shaft 200 in order to push out the workpiece W gripped by the back main shaft 200 toward the tip side of the back main shaft 200 when the work collector 10 is removed.

The workpiece recovery device 10 includes a receiving portion 20, a pipe material 30, and a connecting pipe 40. As shown in FIG. 4, the receiving part 20 has a shape in which a part of the peripheral wall of a cylinder is missing, and includes a semi-cylindrical peripheral wall 21 and an end wall 23 that covers a part of the end surface of the peripheral wall 21 on the tip side. It is equipped with When collecting the workpiece W, the receiving part 20 assumes a posture in which the peripheral wall 21 is arranged at least vertically downward, as shown in FIGS. 3 and 4, and receives the fallen workpiece W on the inner surface of the peripheral wall 21. .

The tube material 30 is formed into a straight tube shape, and a distal end 31 is connected to the rear end of the shaft C1 of the receiving portion 20 (the end opposite to the side where the end wall 23 is formed), and is integrally formed with the receiving portion 20. It is formed. At least a portion of the tube 30 is disposed inside the back main shaft 200.

The connecting pipe 40 is connected to the push rod 220 by having its distal end 41 fixed to the distal end 221 of the push rod 220 with a bolt 225 . The tube material 30 is arranged so as to cover the connecting tube 40 from the outside, and the rear end 42 of the connecting tube 40 and the rear end 32 of the tube material 30 are connected to each other by a bearing 226 so as to be rotatable about the axis C1. ing.

In other words, the connecting tube 40 is fixed to the inner ring of the bearing 226, and the tube material 30 is fixed to the outer ring of the bearing 226, so that the connecting tube 40 and the tube material 30 are relatively rotatable around the axis C1.

Moreover, by moving the push rod 220 parallel to the axis C1, the workpiece collector 10 moves in the direction parallel to the axis C1 inside the back main shaft 200.

Here, a key groove 33 extending in the direction of the axis C1 is formed in the outer peripheral surface of the tube member 30, into which a key 215 provided on the back main shaft 200 is inserted. When the key 215 and the keyway 33 are engaged, the rotation of the tube 30 about the axis C1 with respect to the back main shaft 200 is restrained, and the tube 30 and the receiving part 20 are integrally connected to the back main shaft 200. Rotates around C1.

Note that since the connecting pipe 40 to which the push rod 220 is fixed is rotatable with respect to the tube member 30, the rotation of the back main shaft 200 does not rotate the push rod 220.

Moreover, since the keyway 33 extends in the direction of the axis C1, it does not hinder the movement of the workpiece collector 10 in the direction parallel to the axis C1 due to the movement of the push rod 220 in the direction of the axis C1.

In this way, the workpiece collecting device 1 stores the workpiece collecting device 10 in or protrudes from the back main shaft 200 by moving the push rod 220 in the direction of the axis C1. The protrusion length from the tip of the main shaft 200 can be adjusted.

Specifically, as shown in FIG. 3, when the push rod 220 is moved in the right direction of the axis C1 in the figure, the entire receiving portion 20 largely protrudes from the tip 211 of the back main shaft 200, and a portion of the tube member 30 portion protrudes, and the protrusion length L1 from the back main shaft 200 to the end wall 23 becomes long.

On the other hand, as shown in FIG. 5, when the push rod 220 is moved to the left of the axis C1, the entire tube 30 and a part of the receiving part 20 are housed inside the back main shaft 200, and the back main shaft The protrusion length L2 (<L1) from 200 to the end wall 23 is short.

(motion)
6 is a plan view corresponding to FIG. 2 showing a state in which the back main spindle 200 is close to the front main spindle 300 and the workpiece collector 10 is ready to receive the workpiece W. FIG. 7 is a plan view corresponding to FIG. FIG. 3 is a plan view corresponding to FIG. 2 showing a state in which the device is received by a receiving portion 20 of the device.

Further, FIG. 8 shows that when processing the workpiece W gripped by the front spindle 300 with the tool 281 of the back spindle tool stand 280, the receiving part 20 with the long protrusion length L1 interferes with the side 350 of the front spindle 300. FIG. 9 is a plan view corresponding to FIG. 2 showing the state, and FIG. 3 is a plan view corresponding to FIG. 2 showing a state in which the front main shaft 300 does not interfere with the side 350 of the front main shaft 300. FIG.

The operation of the automatic lathe 100 configured as above will be explained. The workpiece W gripped by the front spindle 300 is processed using tools (not shown) (including tools on the back spindle tool rest 280) (see FIG. 2).

Thereafter, as shown in FIG. 6, in order to collect the processed workpiece W, the back main spindle 200 on which the workpiece recovery device 10 is installed is moved closer to the front main spindle 300. Specifically, the back spindle 200 is moved to a position where the axis C1 of the back spindle 200 coincides with the axis C2 of the front spindle 300, and the peripheral wall 21 of the receiving part 20 is arranged vertically below the processed workpiece W. do.

Thereafter, the workpiece W is separated from the portion gripped by the front main shaft 300 by the cutting tool, and the workpiece W falls downward as shown in FIG. 7, and the receiving part 20 receives the workpiece W.

The back spindle 200 that has received the workpiece W moves to a position away from the front spindle 300 (for example, the position shown in FIG. 2), and rotates the spindle main body 210 (see FIG. 3) of the back spindle 200 (C-axis rotation). As a result, the receiving section 20 is rotated in the direction of arrow R in FIG. 4, and the workpiece W received at the receiving section 20 is delivered to a shooter or the like.

Thereby, the workpiece W can be reliably received from the front main spindle 300 and transported to another location away from the front main spindle 300. After delivering the workpiece W to a shooter or the like, the workpiece recovery device 1 returns the receiving portion 20 to the posture for receiving the workpiece W by rotating the spindle main body 210 to the original position.

By the way, when processing the work W with the tool 281 of the back spindle tool stand 280 while the work W is gripped by the front spindle 300, the back spindle tool stand 280 is moved to the front spindle 300 by moving the back spindle head 290. Bring it closer. At this time, the back spindle 200 installed on the back spindle stock 290 also moves integrally with the back spindle tool rest 280.

When the receiving part 20 protrudes long from the tip of the back main shaft 200, as shown in FIG. Contacts and interferes with attached components, the front headstock on which the front spindle is placed, etc. that are visually integrated with the front spindle.

In the example shown in FIG. 8, the end wall 23, which is the tip of the receiving part 20, interferes with the side 350, so the back main shaft 200 cannot move any further in the direction of the front main shaft 300. In this case, the back spindle stock 290 also cannot move, so the tool 281 of the back spindle tool rest 280 cannot be brought into contact with the end surface Wa of the workpiece W, and processing using the tool 281 cannot be performed.

Therefore, in the work collection device 1 of this embodiment, a part of the receiving portion 20 is accommodated in the main spindle body 210 of the back main spindle 200. That is, as shown in FIG. 3, from the long protrusion length L1 state where the receiving part 20 receives the workpiece W, the push rod 220 is moved in the direction of arrow -Z, and a part of the receiving part 20 is moved from the back side. The main shaft 200 is pulled into the main shaft body 210.

As a result, the receiving part 20 is in the storage position with a short protrusion length L2 (see FIG. 5), and as shown in FIG. Even if the tool 281 is brought into contact, the receiving portion 20 does not come into contact with the side 350 of the front spindle 300, and the workpiece W can be processed.

In the work collection device 1 of this embodiment, the push rod 220 provided in advance on the back main shaft 200 is used as the moving part for moving the work collection device 10, so there is no need to newly provide a moving part.

In the work collection device 1 of the present embodiment, the work collection device 10 is detachably attached to the back main spindle 200, so when machining is performed while gripping the workpiece W by the back main spindle 200, the work recovery device 10 is attached to the back main spindle 200. 200 and attach a work gripping device instead, the back main spindle 200 can be effectively utilized.

In addition, the workpiece collecting device 1 of the present embodiment regulates the rotation of the workpiece collecting device 10 in the direction of the axis C1 using the keyway 33 formed in the tube material 30 of the workpiece collecting device 10 and the key 215 provided in the back main shaft 200. In addition, the C-axis drive of the back main shaft 200 can be used for the rotational movement of the workpiece collector 10.

The work collection device 1 of this embodiment is a configuration example in which the front main spindle 300 is applied as the first main spindle in the present invention, the back main spindle 200 is applied as the second main spindle in the present invention, and the work recovery device 1 is provided on the back main spindle 200. However, the work collection device according to the present invention is not limited to the configuration provided on the back main shaft.

That is, for example, two main axes (a first main axis, a third main axis) arranged in parallel, and a second main axis that can be moved to a position where it is arranged in a straight line with these first main axis and third main axis, respectively. In the automatic lathe equipped with the above, the first spindle is the first front spindle, the third spindle is the second front spindle, and the second spindle is the back spindle. In this case, the back spindle is the first spindle and the second front spindle in the present invention. can also be applied as the second main axis in the present invention. In this case, the work collection device is provided on the second front main shaft.

In the work collection device 1 of the present embodiment, the work collection device 10 has been described as having the receiving portion 20, the pipe material 30, and the connecting pipe 40 connected, but the work collection device 10 has at least the receiving portion 20 and the receiving portion 20 and a pipe member 30 connected to the pipe member 20 may be used.

Further, in the workpiece recovery device of the workpiece recovery device according to the present invention, a part of the receiving portion may function as a pipe material, and the receiving portion and the pipe material may not be configured to be clearly distinguished in terms of external shape. Good too.

The work collection device 1 of the present embodiment has been described as solving the problem that the work collection device 10 abuts and interferes with the side 350 of the front main shaft 300 in the state of the long protrusion length L1, but the work collection device 1 according to the present invention The workpiece recovery device not only solves the problem that the workpiece recovery device with a long protruding length comes into contact with the first spindle side, but also allows the workpiece recovery device to constantly protrude from the back spindle 200 so that the entire back spindle 200 is This also solves the problem of increasing the size of the rear headstock 290 and occupying the movement range of the rear headstock 290.

In other words, if the space occupied by the protruding workpiece collector can be reduced, the overall size of the back spindle 200 can be reduced, eliminating restrictions on the movement range of the back spindle 290, or eliminating long protruding In the case of length, it is also possible to arrange another tool stand or the like at a position on the front main shaft 300 side.

Therefore, the workpiece collecting device according to the present invention solves the problem that the protruding length of the workpiece collecting device is always long, and can adjust the protruding length as appropriate by changing the protruding length of the receiving part that receives the workpiece. can.

1 Work collection device 10 Work collection device 20 Receiving part 30 : Pipe material 100 Automatic lathe 200 Back main spindle (an example of the second main spindle)
220 Push rod (an example of a moving part)
300 Front spindle (an example of the first spindle)
C1, C2 axis W workpiece

Claims (2)

A work collection device in which a receiving part for receiving a work gripped by the first main shaft is provided on a second main shaft that is disposed opposite to the first main shaft,
a workpiece recovery device having the receiving part and a pipe member provided inside the second main shaft and connected to the receiving part;
a moving part that moves the tube material in a direction parallel to the axis of the second main shaft,
The moving part is a push rod that is provided on the second main shaft and moves in parallel to the axis of the second main shaft,
A work collection device that adjusts a protruding length of the receiving portion from a tip of the second main shaft by moving the tube material by the moving portion. A keyway extending in the axial direction of the tube is formed in the outer peripheral surface of the tube, into which a key formed on the second main shaft is inserted, and engagement between the key and the keyway causes the second The work collection device according to claim 1 , wherein the work collection device is rotated together with the second main shaft as the main shaft rotates.