JP2681712B2 - Automatic bar processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic bar processing apparatus, and more specifically, it is constructed by combining a lathe and a bar feeder and the residual material left on the lathe. The present invention relates to an automatic bar processing device capable of smoothly and reliably discharging.

[0002]

2. Description of the Related Art A lathe such as an NC lathe for turning a material to be processed, for example, a bar according to a predetermined program, is widely put into practical use. Among such lathes, a spindle fixed type lathe that moves the cutting tool in the machining axis direction with the spindle fixed, and a spindle moving type lathe that fixes the tool and moves the spindle in the machining axis direction are known. There is. Since the main spindle moving type lathe is turned by a cutting tool in the vicinity of a guide bush for guiding a material to be processed, it is extremely advantageous in improving the processing accuracy of a product as compared with the main spindle fixed type lathe. On the other hand, the main spindle moving type lathe has a drawback that a relatively long residual material is discharged as a result of ensuring the movement of the main spindle in relation to the guide bush that supports and guides the tip end portion of the bar material. Regarding this point, the same applies to a guide bush moving type lathe configured to move the guide bush instead of moving the main shaft.

In order to overcome such drawbacks, the applicant of the present invention has, in an NC lathe of a spindle moving type, a first spindle used for machining most of a material to be machined and a machining using the first spindle. portion that can not, i.e., the first spindle chuck
And a second spindle for processing the part of the material to be processed which is gripped or supported by the guide bush and the end part of the material to be processed have been proposed (JP-A-2-
No. 232102).

In this type of NC lathe, a material to be processed, for example, a bar, is inserted into a guide bush arranged in front of the first spindle, and the material is gripped and rotated by the first spindle. Meanwhile, most of the material to be processed is turned by the cutting tool located in front of the first spindle. This N
The C-lathe also grips and rotates the tip of the material to be processed by a second spindle that is arranged in front of the first spindle so as to face the first spindle, and the cutting tool causes the material to be processed. Is configured for turning, which allows cutting of parts of the work material that cannot be machined by the first spindle.
As well as processing carried out turning over substantially the entire length of the processed materials may prevent the occurrence of end material long.

There is also known an automatic bar feeder configured to sequentially supply a bar as a material to be processed to a lathe in predetermined processing amounts. This type of bar feeder has a function of discharging the residual material remaining on the main shaft of the lathe. For example, a certain type of bar feeder supplies the residual material to the bar feeder while holding the rear end of the residual material with a finger chuck provided at the tip of the feed arrow, and then discharges the clamp type residual material. The device is configured to discharge the residual material.

[0006]

DISCLOSURE OF THE INVENTION Here, the present inventor
We have developed an automatic bar processing machine that has both functions of a lathe and a bar feeder. However, in such an automatic casting material processing apparatus, the following problems occurred in the development process.

That is, the residual material or the end material produced by the turning processing by the main spindle moving type lathe is brought back by the feed arrow,
When configured to discharge in the bar feeder, the feed arrow will perform the gripping process of the new material after the take-back and discharge process of the remaining material, and the processing cycle time is set to secure the time required for the process. I had to set it for a long time overall.

Further, in the lathe of this type, although the turning work can be performed using the second main spindle to a portion fairly close to the end of the bar material, the guide bush arranged between the first and second main spindles. A certain length of mill ends are left behind. Efficiently perform the discharge of such mill ends, to shorten the machining cycle time generally is the end material but rather, the new material tip than applying conventional methods bring back the remaining material in the bar feeder It was found that it is better to use a method of pushing it in front of the guide bush and discharging it into the lathe. However, in this method, especially when a fine bar (for example, a diameter of about 2 mm) is processed,
Due to the bending of the new material, the tip of the new material does not properly align with the rear end of the end material remaining in the guide bush, or the tip of the new material pressed against the rear end of the end material is deflected radially outward. As a result, there is not pushed out of the end member from the guide bush by new material. Furthermore, the end part of the bar is finally cut.
For cutting, only the remaining material is chucked on the first or second spindle.
Feed the remaining material in advance so that it can be gripped with
Must be separated from the backpack. However, it takes
For disengagement, a new mechanism or member, such as the first or
Feed the remaining material by the second main spindle or the finger chuck of the arrow?
The feed arrow stop mechanism that restrains the feed arrow while pulling it out.
Must be provided. It is necessary to newly install such a mechanism.
Not only increases the manufacturing cost of the device,
There is a problem in making it compact.

[0009] The present invention has been made in view of the foregoing, it is an object is constructed by combining a lathe, the bar feeder, during processing cycle
In addition to avoiding a long period of time, the remaining material and the feed arrow
A special mechanism or member for separation from the
Without having to prepare the remaining material and finger chuck with a simple structure
An object is to provide an automatic bar processing device that can be separated . Book
The invention is also capable of smoothly and reliably ejecting a fine rod material.
It is an object of the present invention to provide an automatic bar material processing device that can perform.

[0010]

In order to achieve the above object, the present invention provides a main shaft moving type lathe (20) for turning a bar (W) and a rear end portion of the bar. A bar material feeder (10) provided with a feed arrow (13) for gripping and advancing the bar material toward the lathe, wherein the bar material feeder is
In an automatic bar processing apparatus having a feed arrow moving mechanism for moving the feed arrow forward or backward, a front discharge for discharging a scrap material (EW) left inside a guide bush (23) of the lathe to the front of the guide bush. The front discharging means includes a holding means (22) for holding the residual material of the bar material gripped by the feed arrow on the lathe, and a holding control means (C2) for controlling the operation of the holding means. And a feed arrow control means (C1) for controlling the operation of the feed arrow moving mechanism, wherein the front discharging means holds the holding means by the holding control means in order to separate the residual material from the feed arrow. While the remaining material is being held by means, the feed arrow control means causes the feed arrow moving mechanism to retract the feed arrow, and further the feed arrow control means and the holding control means cause the feed arrow moving mechanism. And the holding hand Of the new material (W) grasped by the feed arrow to extrude the end material in front of the guide bush, and the lathe has a first main spindle (21) for performing turning. And a second main shaft (25) opposed to the first main shaft, and a take-out discharging means (15, for discharging the residual material to the bar feeder for discharging the residual material. C1), and a discharge operation selection means (SW) for selecting one of the discharge operation of the residual material by the take-out discharge means and the discharge operation of the scrap material by the front discharge means. To provide an automatic bar processing device.

According to the above configuration of the present invention, it is possible to select the discharge of the scrap material by the front discharging means and the discharge of the residual material by the take-out discharging means.

First, when the discharge of the end material by the front discharge means is selected, the automatic bar processing apparatus does not need to bring back the residual material, and therefore, the final product processing for the bar material being processed on the lathe can be performed. While it is being performed, the feed arrow can be retracted to the bar feeder to perform the gripping process of the new material.
Therefore, the processing cycle time can be shortened as a whole. Further, since the remaining material and the feeding arrow can be separated by retracting the feeding arrow while the remaining material is held by the holding means, the remaining material and the feeding arrow can be separated without providing a special mechanism or member. It can be separated.

On the other hand, when the discharge of the residual material by the take-out discharging means is selected, the residual material of the fine bar material that cannot be pushed out from the guide bush can be brought back to the bar material feeder and discharged. It is possible to always discharge the remaining material smoothly and reliably regardless of the diameter of the bar material.

In a preferred embodiment of the present invention, the lathe includes a first spindle for turning a bar material,
A second main spindle opposed to the first main spindle, and the feed arrow control means indicates that the bar material held by the holding means is a residual material having a length equal to or shorter than a predetermined length. When the position detecting means detects the remaining material, the holding control means causes the holding means to hold the remaining material, and the feed arrow control means controls the feeding arrow. The moving mechanism retracts the feed arrow.

According to the automatic bar processing apparatus having the above structure,
By using the first and second spindles, it is possible to perform turning over substantially the entire length of the material to be processed and prevent the generation of long scraps. Further, by the position detecting means, it is possible to detect that the bar is shortened to a predetermined length or less,
This can be used to easily know the start of final processing of the end portion of the bar.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of an automatic bar processing apparatus according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a schematic front view of an automatic bar material processing apparatus according to an embodiment of the present invention. As shown in FIG. 1, the automatic bar processing apparatus 1 is substantially composed of a bar material feeder 10 and an NC lathe 20 which are aligned with each other along a bar axis XX.

The bar feeder 10 comprises a main body 12 supported by the legs 11 and 11, and a feed arrow 13 movably supported by the main body 12 along the machining axis XX. A finger chuck 14 for gripping the rear end of the rod W is rotatably attached to the tip of the feed arrow 13. The bar material feeder 10 is also provided with a new material supply mechanism and a feed arrow moving mechanism (not shown).
A bar to be newly machined, that is, a new bar is put on the machining axis selection XX in front of the feed arrow 13, and the feed chuck moving mechanism is used with the finger chuck 14 gripping the rear end of the bar W. Is operated to move the bar W forward toward the NC lathe 20. In addition, the feed arrow moving mechanism
The arrow 13 can be retracted . Bar material feeder 10
Has a residual material discharge device 15 for removing the remainder RW from the finger chuck 14 when the arrow 13 sends remainder RW remaining NC lathe 20 is brought back. Residual material discharge device 15 includes a remaining member clamps 16 for gripping and releasing the remainder RW, and a remainder receiver 17 for receiving the remainder RW released from remainder clamp 16. Description below
At, the residual material is taken back to the bar feeder 10 and discharged.
Bars or products shortened by processing to the required length
Only one more can be made with NC lathe 20
It means a bar having a length. Also below
The mill ends mentioned can no longer be machined on the NC lathe 20
It shall mean a bar of length.

The bar feeder 10 further includes a controller C1 for controlling the operation of the bar feeder 10, and a feed arrow 13.
End sensor D for detecting that the
1, a front end sensor D2 for detecting that the feed arrow 13 is at the foremost end position, and that the feed arrow 13 is located at a predetermined position between the rearmost end position and the foremost end position Intermediate position sensor D3 and a residual material discharge sensor D4 for detecting that the residual material RW has fallen from the residual material clamp 16.
And Each sensor D1, D2, D3, D4
The controller C1 is connected to the controller C1.
Is configured to control the operation of the bar feeder 10 based on the information detected by these sensors D1, D2, D3, D4. In addition, the intermediate position sensor D3
Is attached to the main body 12 so as to be movable in the machining axis XX direction, and the attachment position of the intermediate position sensor D3 is appropriately adjusted according to the length of the product.

The bar feeder 10 is provided with an operation selection switch SW connected to the controller C1. The operation selection switch SW can be operated manually by operating the NC lathe 2
This is for selecting the discharge method of the residual material RW or the residual material EW remaining at 0, and the feed arrow 13 brings back the residual material RW ,
A position I for instructing the controller C1 of the discharging method for discharging the bar material feeder 10 and a position II for selecting a discharging method for discharging the end material EW in the NC lathe 20 are provided.

The NC lathe 20 includes a movable first spindle 21 having a collet chuck 22, a guide bush 23 arranged in front of the spindle 21, a cutting tool 24 arranged in front of the guide bush 23, and a collet. And a movable second main shaft 25 having a chuck 26. The first spindle 21, the guide bush 23, and the second spindle 25 are aligned on the machining axis XX. The second main shaft 25 is arranged in front of the cutting tool 24 so as to face the first main shaft 21.

The first main spindle 21 and the second main spindle 25 hold the bar W by the collet chucks 22 and 26 , and rotate the bar W while moving it back and forth along the machining axis XX. It is configured. The guide bush 23 guides the rod W along the machining axis XX by the guide hole 23a slidingly contacting the peripheral surface of the rod W. In addition, the cutting tool 24 moves toward the machining axis XX,
Alternatively, when the rod W is moved laterally away from the axis and is engaged with the outer periphery of the rod W that is rotating at high speed, the rod W
Turn the outer periphery of.

The second main shaft 25 holds the front end portion of the bar W by the collet chuck 26 and rotates the bar W at a high speed when the entire length of the bar W becomes a predetermined length or less. While being made to move, it is constituted so that it may move back and forth along the processing axis line XX. While the second main shaft 25 is driven and the rod W moves in the front-rear direction while rotating at a high speed, the guide bush 23 guides the rear end portion of the rod W, and the cutting tool 24 and the guide bush 23 and the first end. 2 spindle 25
In between, the outer peripheral portion of the bar W is turned.

The NC lathe 20 also includes a first spindle 21 and a second spindle 21 .
And a controller C2 having a first machining program for controlling the turning by the main shaft 25, and a second machining program for controlling the turning of the final product by the second spindle 25. The controller C2 and the controller C1 of the bar material feeder 10 are connected to each other, and both controllers cooperate to work with the bar material feeder 10 and N.
Performs cooperative control with the C lathe 20.

FIG. 2 is an explanatory view showing the turning process and the end material discharging process of the automatic bar processing apparatus 1. 3 to 6 are flowcharts showing control modes of the controllers C1 and C2. The control mode and operation of the automatic bar processing apparatus 1 will be described with reference to the drawings.

As shown in FIG. 3, the bar material feeder 10 supplies a new material (bar material W) from the new material supply mechanism in front of the feed arrow,
The rear end of the bar W is gripped by the finger chuck 14 of the feed arrow 13 (S1). The controller C1 determines the position of the operation selection switch SW (S2). Hereinafter, the case where the operation selection switch SW is located at the position II and the case where the operation selection switch SW is located at the position I will be described separately.

As a result of the operator selecting a discharge method (hereinafter referred to as front discharge) for discharging the scrap EW in the NC lathe 20, when the operation selection switch SW is in the position II, the controller C1 is , The feed arrow moving mechanism is commanded to move forward, and the feed arrow moving mechanism uses the intermediate position sensor D.
The feed arrow 13 is moved forward until 3 is activated (S
3, 4). As shown in FIG. 2A, when the intermediate position sensor D3 is ON, the feed arrow 13 is attached to the first spindle 21 of the NC lathe 20 in the retracted position by the bar W held by the feed arrow 13.
Is advanced to a position (hereinafter, referred to as an intermediate position) where the intermediate position sensor D3 can be inserted, and the controller C1 stops the feed arrow 13 by turning ON the intermediate position sensor D3 (S5).

Next, the controller C2 of the NC lathe 20
Causes the collet chuck 22 of the first main spindle 21 to grip the bar W (S6), while the controller C1 urges the feed arrow moving mechanism forward with a predetermined propulsive force with respect to the feed arrow moving mechanism. (S7). The controller C2 is
As shown in FIG. 2B, the first spindle 21 is moved forward, and the bar W pushes the end material RW of the bar processed in the previous processing cycle forward of the guide bush 23 and discharges it into the NC lathe 20. (S8). Then, the controller C2
Confirms that the end material EW of the guide bush 23 has been discharged by an end material confirmation means (not shown) (S9, 1).
0). The controller C2 uses a scrap material on the guide bush 23 .
When it is determined that EW remains, an alarm (not shown)
Is activated to warn the operator (S11).

The controller C2 has a guide bush 23.
When it is determined that the scrap EW does not remain in the machine tool, the cutting tool 24 is advanced to a predetermined machining position, and as shown in FIG. 4, the driving mechanism of the NC lathe 20 is instructed to start turning based on the first machining program. The first spindle 21 and bite 2
Turning of the bar W according to No. 4 is performed (S12). In this turning process, the first main spindle 21 and the second main spindle 25 respectively rotate the rod W at high speed and move back and forth according to a predetermined program, and the cutting tool 24 turns the outer peripheral portion of the rod W. Byte 2
When the turning of the bar W to a predetermined length is completed, No. 4 cuts off the processed bar W as a product.
Further, the collet chuck 22 of the NC lathe 20 re-grasps the rear portion of the bar W, and the bar feeder 10 moves the NC lathe 2
The rod W is advanced by a predetermined processing length according to the operation of 0. After that, such an operation is repeated. Since the machining process under the first machining program is already known, further detailed description will be omitted.

The controller C1 turns on the front end sensor D2 for turning the NC lathe 20 according to the first machining program and the corresponding bar feeding operation of the bar feeder 10.
The operations are sequentially performed until the operation is detected (S13) and the controller C2 detects the completion of the final turning step of the bar W by the first spindle 21 (S14). The feed arrow 13 and the first spindle 21 in this state are shown in FIG. 2C. Controller C
2 further holds the collet chuck 22 in a closed state (S15, 16).

Next, as shown in FIG. 5, the controller C1 retracts the feed arrow 13 by the feed arrow moving mechanism until the rear end sensor D1 is turned on (S17, 1).
8). As a result, the residual material RW is collected by the collet chuck 22.
And remains on the first spindle 21. Thus, the residual material RW
And the finger chuck 14 of the feed arrow 13 are separated.
You. Further, the controller C1 moves the second spindle 25 backward based on the second program, and causes the collet chuck 26 to grip the residual material RW . As shown in FIG. 2D, the second main spindle 25 cooperates with the guide bush 23 to support the bar W and rotate the bar W at a high speed, and the bite 24 cannot be turned only by the first main shaft 21. Turning processing is performed on the remaining length R W (S19). When the controller C2 confirms the end of the turning process, it retracts the cutting tool 24 to a predetermined retracted position (S2).
0, 21, 22). As a result, as shown in FIG. 2A,
Although the scrap RW is left on the guide bush 23, it can be easily processed.
As can be understood, this scrap RW is a bar to be newly processed.
Front of the guide bush 23 by the front end of the material W (new material)
And is discharged into the NC lathe 20 (S1 to S
11).

On the other hand, as a result of the operator selecting the discharging method for discharging the residual material in the bar feeder 10 (hereinafter referred to as take-out discharging), when the operation selection switch SW is in the position I, As shown in FIG. 6, the bar feeder 10 and the NC lathe 20 perform the same operation as in the case of the above-described front discharge until the end of the first machining program. That is, the controller C1 advances the feed arrow 13 to the intermediate position where the intermediate position sensor D3 is turned on (S31,
32), the controller C2 causes the collet chuck 22 of the first main spindle 21 to grip the bar W (S3).
3), under the control of the first machining program, the first spindle 2
1. The bar W is turned by the second main spindle 25 and the cutting tool 24 (S33, 34). This turning is performed until the controller C1 detects the ON operation of the front end sensor D2 and the controller C2 detects the end of turning according to the first machining program (S35, 36).

[0032] However, in the subsequent operation, the automatic bar processing apparatus 1 is different from the operation of the front discharge, without turning the second machining program, bring the remainder RW on the bar feeder 10. That is, the controller C1 retracts the feed arrow 13 until the rear end sensor D1 detects the rear end position of the feed arrow by the feed arrow moving mechanism (S37, 3).
8) Then, the residual material discharging device 15 is instructed to remove the residual material RW (see FIG. 1) held by the finger chuck 14 from the finger chuck 14 (S39). In the carry-out discharge operation, the residual material discharging device 15 grips the residual material RW brought back by the feed arrow 13 by the residual material clamp 16 and, by the subsequent slight retraction of the feed arrow 13, the residual material RW and the finger chuck. 14 is separated. Further, the residual material discharging device 15 releases the residual material clamp 16 to drop the residual material RW into the residual material receiver 17. The controller C1 confirms the discharge of the residual material RW by the residual material discharge sensor D4 provided in the residual material receiver 17 and ends the processing cycle (S40).

As described above, the automatic bar material processing apparatus 1 in this embodiment has the NC lathe 20 of the spindle moving type and the feed arrow 13 for advancing the bar material W by a predetermined machining length with respect to the NC lathe 20. The bar stock feeder 10 is provided, and in order to discharge the end material EW left in the guide bush 23 of the NC lathe 20, the remaining material RW is pressed forward by the front end of the new material to guide the guide bush. It is configured to push forward from 23. Therefore, the automatic bar processing device 1 uses the residual material RW to remove the residual material RW.
One more product from the remaining material RW without bringing it back to 0
The product is picked up and the end remaining on the guide bush 23
The material EW can be discharged in front of the guide bush 23. As a result, while the last product is being processed on the NC lathe 20, the feed arrow 13 retracts to the bar material feeder 10 and the gripping step for a new material can be performed immediately, so the automatic bar material processing apparatus 1 Can shorten the processing cycle time as a whole.

Further , the NC lathe 20 is a bar material during cutting.
The bar material feeder 10 includes a first spindle 21 and a second spindle 25 that rotate W, and the bar feeder 10 includes an operation selection switch SW and a controller C1 that can selectively perform turning of the residual material RW . . Therefore, the automatic bar processing device 1
Can appropriately perform turning of the end portion of the bar W by selection based on the total length of the bar W and the length of each product.

Further, the automatic bar material processing apparatus 1 is capable of performing take-out discharge operation and front discharge operation.
An operation selection switch SW having a feed arrow moving mechanism of 0 and a residual material discharging device 15 and selectively causing the feed arrow moving mechanism , the residual material discharging device 15 and the NC lathe 20 to perform any one of the above-mentioned operations. And controllers C1 and C2. Therefore, the automatic bar processing apparatus 1 sets the operation selection switch SW to the position when turning the small bar W.
By switching to I
Selection can be more to guide the remaining material of the bar W fine, such as not extruded from the bush 23 RW to the bar feeder 1
You can take it back to zero and discharge it. Thus, regardless of the diameter of the rod W, the residual material RW can always be discharged smoothly and reliably. The automatic bar processing device 1 further includes an operation selection switch.
When the SW is in position II, the front end sensor
When the cover D2 is turned on, the collet chuck 22 leaves the remaining material.
With the RW held, the feed arrow moving mechanism feeds the arrow.
13 is retracted. Colette cha
The residual material RW gripped by the hook 22 is moved backward by the feeding arrow 13
Is released from the finger chuck 14. Therefore,
The moving rod material processing apparatus 1 is configured to remove the residual material RW during the forward discharging operation.
Special mechanism or member for separating the feeding arrow 13 from the feeding arrow 13
The residual material RW and the feed arrow 13 are separated without providing
be able to.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications and changes can be made within the scope of the invention described in the claims. Needless to say, these are also included in the scope of the present invention. For example, the controller C1 may be configured to automatically select the operation based on the length of the new material and the product, or the diameter of the new material.

[0037]

According to the constitution of the present invention, it is constituted by combining a lathe and a bar feeder, and it is possible to avoid extending the processing cycle time and to separate the residual material from the finger chuck of the feed arrow. An automatic bar processing apparatus capable of separating a residual material and a finger chuck with a simple structure and smoothly and reliably discharging a thin bar material without a special mechanism or member for It becomes possible to provide.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an automatic bar processing device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a turning process and a residual material discharging process of the automatic bar processing apparatus shown in FIG.

FIG. 3 is a flowchart showing a part of a control mode of the controller shown in FIG.

4 is a flowchart showing a part of a control mode of the controller shown in FIG.

5 is a flowchart showing a part of a control mode of the controller shown in FIG.

6 is a flowchart showing a part of a control mode of the controller shown in FIG.

[Explanation of symbols]

 1 Automatic Bar Machining Device 10 Bar Material Feeder 11 Leg 12 Body 13 Feed Arrow 14 Finger Chuck 15 Remaining Material Discharging Device 16 Remaining Material Clamp 20 NC Lathe 21 First Spindle 22 Collet Chuck 23 Guide Bushing 24 Bit 25 Second Spindle 26 Collet chuck D1 Rear end sensor D2 Front end sensor D3 Intermediate position sensor D4 Residual material discharge sensor C1 controller C2 controller

Claims (2)

(57) [Claims] 1. A spindle-moving lathe (20) for turning a bar (W), and a feed for holding the rear end of the bar and advancing the bar toward the lathe. A bar feeder (10) with an arrow (13), the bar feeder comprising:
In an automatic bar processing apparatus having a feed arrow moving mechanism for moving the feed arrow forward or backward, a front discharge for discharging a scrap material (EW) left in the guide bush (23) of the lathe to the front of the guide bush. Holding means (22) for holding, on the lathe, the residual material of the bar material gripped by the feed arrow.
And holding control means (C2) for controlling the operation of the holding means
And a feed arrow control means (C1) for controlling the operation of the feed arrow moving mechanism, and the front discharge means uses the holding control means to separate the residual material from the feed arrow. While the remaining material is being held by the holding means, the feed arrow is moved backward by the feed arrow moving mechanism by the feed arrow control means, and the feed arrow is moved by the feed arrow control means and the holding control means. A first part for controlling the operation of the mechanism and the holding means to extrude the end material in front of the guide bush at the front end of the new material (W) gripped by the feed arrow, and the lathe for performing the turning process. Spindle (21)
And a second main shaft (25) opposed to the first main shaft, and a take-out discharging means (15, for discharging the residual material to the bar feeder for discharging the residual material. C
1) and a discharging operation selecting means (SW) for selecting one of the discharging operation of the residual material by the take-out discharging means and the discharging operation of the scrap material by the front discharging means. An automatic bar processing device. 2. The position detecting means (D2) for detecting, by the position of the feed arrow, that the feed arrow control means detects that the bar material held by the holding means has become a residual material having a length equal to or shorter than a predetermined length.
When the position detecting means detects the remaining material, the holding control means causes the holding means to hold the remaining material, and the feed arrow control means causes the feed arrow moving mechanism to retract the feed arrow. The automatic bar material processing apparatus according to claim 1, wherein: