JP3208314B2 - Automatic bar feeder and automatic bar feed method - 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 feeder and an automatic bar feed method, and more particularly to a bar having a small diameter, particularly a bar having a diameter of several mm to 1 mm or less. The present invention relates to an automatic bar feeder and an automatic bar feed method capable of feeding a bar to an automatic bar processing machine such as an NC automatic lathe.

[0002]

2. Description of the Related Art Automatic lathes, such as NC lathes, for cutting the tip of a bar based on a preset product processing program are widely used. In recent years, in this type of automatic lathe, the necessity or frequency of precision machining of small or fine products such as watch parts using a fine material, for example, a rod-shaped material having a diameter of several mm to 1 mm or less has been gradually increased. There is a demand for an automatic bar feeder and an automatic bar feed method capable of smoothly feeding such an ultrafine material to an automatic lathe without any trouble. The present applicant has a bar feeder provided with a plurality of screws functioning as a material shelf and a new material replenishing mechanism, for example, as a bar feeder for feeding a small-diameter thin bar to an automatic lathe. It has already been put into practical use. Such a screw feeder is disclosed in Japanese Utility Model Publication No.
As disclosed in Japanese Patent Application Laid-Open No. 8778 and Japanese Utility Model Application Laid-Open No. 47101/1990, a plurality of screws having a spiral groove for holding a bar are configured to feed the bar to a bar feed guide rail. I have. Further, in order to prevent small diameter bars in the bar feeding guide rail from jumping out of the bar guide groove of the guide rail, the applicant of the present invention provided a shutter capable of opening and closing the bar guide groove on the upper surface of the guide rail. Japanese Patent Application No. 4-65812 (Japanese Unexamined Patent Application Publication No.
No. 269602).

[0003]

However, in order to supply the bar (new material) to the automatic lathe, the bar supplied to the guide rail of the bar feeder is supplied to the spindle and collet chuck of the spindle of the automatic lathe. When feeding to
The tip of the bar receives the frictional resistance of the guide rail, contacts the mechanisms or parts around the bar guide groove, abuts or contacts the main spindle components of the automatic lathe, or the penetration resistance of the inner tube of the main shaft. May be received. When a medium or relatively large bar having a diameter of 10 to several tens mm is fed to an automatic lathe, the bar is smoothly moved to the main shaft by a predetermined operation or a general operation adjusting means. Although it can be supplied, especially when a bar having a diameter of about 1 mm or less is fed to the main shaft, the bar itself is greatly bent or bent, or the bar is easily bent, so that it is desired. It is difficult to feed bars to automatic lathes. The present invention has been made in view of such a point,
An object of the present invention is to provide an automatic bar feeder and an automatic bar feed method capable of reliably and smoothly feeding a small-diameter bar, particularly an extremely fine bar, to an automatic lathe. .

[0004]

In order to achieve the above object, the present invention provides an automatic bar feeder for feeding a bar to an automatic bar processing machine, wherein a bar to be fed to a top is provided. It has a new material receiving opening for receiving, and transports the bar stored through the new material receiving opening toward the automatic bar processing machine in the bar feeding direction forward. A movable guide movably disposed on the movable guide; and a bar feeder for pressing the bar in the movable guide forward in the feeding direction and sending the bar forward in the feeding direction with respect to the movable guide. Has,
An automatic bar feeder is provided.

According to the above structure of the present invention, the bar is received through the new material receiving opening provided at the top of the movable guide, and the movable guide is accommodated in the movable guide in a state where the bar is accommodated in the movable guide. Moving forward, the bar is brought close to a processing portion of the automatic bar processing machine, for example, a spindle inner tube or a collet chuck of an NC automatic lathe. Therefore, the bar protected by the movable guide can avoid damage, bending, bending or deformation of the bar which may occur during the bar feeding.

According to another aspect of the present invention, in the automatic bar feeding method using the above-described automatic bar feeding machine, a bar to be fed through a new bar receiving opening provided at the top is provided. A bar transporting step of storing the movable guide forward in the bar feed direction and transporting the bar toward an automatic bar processing machine; and A bar feeding step of pressing the bar in the feeding direction forward and projecting the bar forward of the movable guide.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a preferred embodiment of the automatic bar feeder according to the present invention, the bar processing machine has a new bar supply mechanism having a screw type feeder having a spiral groove for supporting the bar. The feeder feeds a bar into the movable guide. Preferably, the movable guide includes a guide groove into which a bar can be inserted, a front portion in the feeding direction of the guide groove forms a bar material receiving area capable of receiving the bar, and a rear portion in the feeding direction of the guide groove. Forms a feed member disposition area in which a bar feed member can be disposed. More preferably, the bar feed member is formed of a feed arrow capable of pressing the bar forward in the feeding direction, and the blade portion of the feed arrow protrudes radially outward of the guide groove. According to a further preferred embodiment of the present invention, the bar feed member is connected to a traction member of a feed member driving device, and the traction member urges the bar feed member forward in the feeding direction. The movable guide is connected to a traction member of the movable guide driving device, and the traction member urges the movable guide forward in the feeding direction. Preferably, a connecting device for regulating the relative movement of the bar feeding member and the movable guide is provided between the bar feeding member and the movable guide, and the connecting device connects the bar feeding member and the movable guide so as to be accessible. At the same time, the distance between the bar feeding member and the movable guide exceeding a predetermined distance is prevented. More preferably, the connecting device, when the bar feed member and the movable guide are separated by a predetermined distance, the driving force of one of the bar feed member or the movable guide, via the connecting device, the bar feed member or the movable guide of the movable member It is transmitted to the other.

According to another preferred embodiment of the present invention, there is provided a drive control device for controlling the forward movement of the bar feed member and the movable guide, wherein the control device is configured such that the drive device is a bar feed member. In addition, the forward speed or forward movement of the bar feeder and the movable guide is restricted against the traction force applied to the movable guide. More preferably, the drive control device presses or urges the bar feeding member and / or the movable guide rearward in the feeding direction, and retreats the bar feeding member and / or the movable guide.
According to a preferred embodiment of the automatic bar feeding method of the present invention, in the bar feeding step, the movable guide advances integrally with the bar feeding member, and in the bar feeding step, the movable member feeds the bar feeding member. The bar is advanced relatively to the movable guide, and the bar is pushed forward by the bar feeding member in the feeding direction. More preferably, after the above-mentioned bar delivery step is completed,
The movable guide retreats the bar feed member and the movable guide to a bar supply position for receiving the bar.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an automatic bar feeder and an automatic bar feed method according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic front view showing an automatic bar feeder according to an embodiment of the present invention, and FIGS.
4 is a longitudinal sectional view, a perspective view, and a partially enlarged sectional view of the feed arrow and the movable guide shown in FIG. As shown in FIG. 1, an automatic bar feeder 1 for feeding a bar W to a bar processing machine is disposed adjacent to a bar processing machine, that is, an NC automatic lathe 2. The bar feed axis of the bar feeder 1 coincides with the processing axis XX of the lathe 2, and the lathe 2 cuts the tip of the bar W supplied by the bar feeder 1, and From the tip of the bar W. The bar feeder 1 includes a control panel 9 for controlling the operation of the bar feeder 1, a main body frame 11 oriented to extend along the machining axis X 軸 X of the lathe 2, a feed arrow 13 and a movable guide. And a screw-type bar supply mechanism 7 for holding a plurality of new bars W '(ie, stocks) of a plurality of bars to be supplied.
(Indicated by a virtual line). Body frame 11
Are supported by front and rear stands or legs 10 and extend parallel to the processing axis XX of the lathe 2. As shown in FIG. 3, the bar supply mechanism 7 includes a plurality of screw feeders 8 on which new materials W can be placed.
A spiral groove is formed on the outer peripheral surface of each feeder 8 (screw) arranged at a predetermined interval in the longitudinal direction of the feeder 8. Bars (new materials) W 'to be replenished are respectively held in upper portions of the spiral grooves arranged at equal intervals. The feeder 8 is synchronously rotated by a feeder driving device (not shown) at the time of replenishment of new material, and moves the bar W ′ toward the tip of the feeder 8 by displacement of the upper part of the spiral groove.
Thus, the bar W ′ located at the tip is moved to the movable guide 1.
Put in 4.

As shown in FIG. 1, the bar feed mechanism of the bar feeder 1 includes a feed arrow 13 for feeding the bar W to the lathe 2 and a feed arrow 13 for feeding the bar forward. A feed arrow driving device 3 that applies driving force or propulsion to the bar feed member or feed arrow 13, a guide driving device 4 that applies driving force or propulsion to the movable guide 14, and a forward movement of the feed arrow 13 and the movable guide 14. A drive control device 5 that regulates the feed arrow 13 and the movable guide 14 and a guide coupling device 6 that interlocks the feed arrow 13 and the movable guide 14 when the feed arrow 13 is retracted.
And As shown in FIG. 2, the feed arrow 13 having a circular cross section is disposed movably in the axial direction in a movable guide groove 15 of a movable guide 14 capable of accommodating the bar W. The central axis of the feed arrow 13 and the central axis of the movable guide groove 15 coincide with the machining axis XX of the lathe 2. The movable guide 14
It is a structure having a generally circular cross section with the top wall portion removed or omitted, and is slidably received in the fixed guide groove 17 of the fixed guide 16. The outer peripheral wall of the movable guide 14 has a sectional shape complementary to the inner peripheral wall of the fixed guide groove 17 and is guided by the fixed guide groove 17 in the processing axis XX direction. The upper surface of the fixed guide 16 is inclined downward toward the movable guide 14 so that the operation of receiving or removing the bar W from or to the movable guide groove 15 can be easily or smoothly performed. The lower half is formed in a substantially rectangular shape, and is integrally supported by the main body frame 11 (FIG. 1).

As shown in FIG. 3, the movable guide 14 has a front end portion having a cross-sectional shape and dimensions that can be inserted into the main shaft inner tube I, and a cylindrical central portion 19. A bar engaging portion 18 having a conical concave shape formed at the front end of the feed arrow 13 is disposed in the central portion 19. The movable guide 14 exposes the movable guide groove 15 having a top opening except for the central portion 19, and the top opening 20 located at the front of the movable guide 14 is fed from the screw feeder 8 of the bar supply mechanism 7. A new material receiving opening for receiving the new material (bar material) W ′ into the movable guide groove 15 is formed. The bracket support 22 projects upward from the central portion 19, and the box-shaped bracket 46 to which the driving force of the guide driving device 4 (FIG. 1) is transmitted is integrated with the top horizontal flange of the bracket support 22. And is supported by the bracket support portion 22. A bracket support portion 23 disposed rearward of the bracket support portion 22 projects upward from the rear end of the feed arrow 13 and forms a so-called blade of the feed arrow. The top horizontal flange of the bracket support 23 integrally supports the box-shaped bracket 36 to which the driving force of the feed arrow driving device 3 (FIG. 1) is transmitted. The bracket support 23 vertically penetrates a top opening 21 located at the rear of the movable guide 14, and the top opening 21 is used for moving a blade portion that enables the bracket support 23 to move in the axial direction of the feed arrow 13. Construct an opening.

As shown in FIG. 1, the feed arrow driving device 3 comprises:
A wire rope or a steel wire 31 (hereinafter, referred to as a wire 31) for transmitting a driving force or a thrust to the feed arrow 13, a large-diameter wheel 32 capable of winding a front end portion of the wire 31,
A wire rope or a steel wire 34 (hereinafter, referred to as a wire 34) wound around a small-diameter reel portion 33 of the wheel 32.
And a weight or weight 35 fastened to the lower end of the wire 34. As shown in FIG. 4, the wire 31 penetrates through a wire insertion hole formed in the front wall 46a and the rear wall 46b of the bracket 46 so as to be relatively displaceable. A movable rod 37 is fastened to the rear end of the wire 31.
Penetrates through an opening formed in the front wall 36a of the bracket 36 so as to be relatively displaceable. Compression coil spring 39
Is inserted between the rear end flange 38 of the movable rod 37 and the front wall 36a, and the bracket 36 is pulled by the wire 31 via the spring 39 and the movable rod 37.
As shown in FIG. 1, the wire 31 extends forward along the main body frame 11 and is wound around a large-diameter wheel 32. Referring to FIG. 1, the tip of the wire 34 wound around the small-diameter reel portion 33 hangs down from the small-diameter reel portion 33, and the gravity of the weight 35 constantly applies torque to the small-diameter reel portion 33. However, when the bar feeder 1 is not operated, the rotation of the wheel 32 is stopped by the fastening of the brake means (not shown), and the weight 35 is held at the highest position. The brake means is released when the bar is fed, so that the small-diameter reel portion 33 is
5 by the action of gravity. The wheel 32 rotates integrally with the small-diameter reel portion 33 arranged concentrically with the wheel 32, and winds up the wire 31. Thus, the gravity of the weight 35 is reduced by the small-diameter reel portion 33 and the large-diameter wheel 3.
2, the torque of the wheel 32 decelerated is
It is transmitted to the wire 31 as a feed arrow traction force.

The guide driving device 4 has substantially the same overall configuration as the feed arrow driving device 3, and transmits a driving force or thrust to the movable guide 14 by a wire rope or a steel wire 41 (hereinafter referred to as a wire 41). ), A large-diameter wheel 42 capable of winding a front end portion of a wire 41, and a wheel 42
A wire rope or a steel wire 44 (hereinafter referred to as a wire 44) wound around a small-diameter reel portion 43 of the wire 4;
4 and a weight or weight 45 fastened to the lower end. As shown in FIG. 4, a movable rod 47 is fastened to the rear end of the wire 41, and the movable rod 47 passes through an opening formed in a front wall 46 a of the bracket 46 so as to be relatively displaceable. The compression coil spring 49 is used to move the movable rod 4
7, between the rear end flange 48 and the front wall 46a,
The bracket 46 is connected to the wire 4 via a spring 49.
Towed by one. As shown in FIG.
The tip of the wire 44 wound around 3 hangs down from the small-diameter reel portion 43, and the gravity of the weight 45 constantly applies a torque to the small-diameter reel portion 43. The rotation of the wheel 42 is stopped or prevented by the fastening of a brake means (not shown), and the wheel 42 is rotated by the gravity action of the weight 45 when the brake means is released at the time of feeding the bar. The wheel 42 rotates integrally with the small-diameter reel portion 43 arranged concentrically with the wheel 42, and winds up the wire 41. Therefore, the gravity of the weight 45 is converted into a torque of the small-diameter reel portion 43, further reduced by the wheel 42, and transmitted to the wire 41 as a movable guide traction force.

The drive control device 5 (FIG. 1) is connected to a servo motor or an electric motor 51 attached to the rear end of the main body frame 11 to an output shaft of the motor 51 via an electromagnetic clutch or the like (not shown). Driven pulley 52, a horizontal driven pulley 53 attached to the front end of the main body frame 11 via a bearing, and an endless linear member or an endless wire 54 orbiting the outer periphery of the driving pulley 52 and the driven pulley 53.
And As shown in FIG. 4, one traveling band of the endless wire 54 penetrates through openings formed in the brackets 36 and 46 so as to be relatively displaceable. A dock or enlargement regulating member 55 constituting a pusher is fixed to the endless wire 54 between the brackets 36 and 46. A compression coil spring 56 is interposed between the expansion regulating member 55 and the front wall 36a of the bracket 36. The forward movement of the bracket 36 is restricted by the expansion restricting member 55 via the spring 56, while the retreating movement of the expansion restricting member 55 is transmitted to the bracket 36 via the spring 56. The guide connecting device 6 includes a guide rod 61 protruding forward from the bracket 36. The front end of the guide rod 61 penetrates through the openings of the rear wall 46b and the front wall 46a of the bracket 46 so as to be relatively displaceable. An adjustment nut 62 is screwed to the front end of the guide rod 61. The rear end of the guide rod 61 is connected to the front wall 36a and the rear wall 36b of the bracket 36.
, And a pair of fixing nuts 63 and 64
6a and the rear wall 36b are screwed to the guide rod 61 so as to sandwich each. The front end of the guide rod 61 extends forward of the bracket 46 when the bracket 36 advances, so that the bracket 36 can relatively advance toward the bracket 46. On the other hand, the nut 62 abuts against the front wall 46a of the bracket 46 when the bracket 36 is retracted, and the guide rod 61 is integrally and removably connected so that the brackets 36, 46 do not separate from each other. Therefore, the retreating movement of the bracket 36 is transmitted to the bracket 46 via the guide rod 61, and the brackets 36, 46 are retracted integrally.

Next, the operation of the bar feeder 1 will be described. The bar W ′ supported on the screw type feeder 8 of the bar replenishing mechanism 7 is positioned above the processing axis XX by rotation of each screw constituting the feeder 8, that is, in the region immediately above the movable guide 14. It is moved, falls from the tip of the screw, and is thrown into the movable guide groove 15 through the top opening 20 of the movable guide 14. The feed arrow driving device 3 and the movable guide driving device 4 are operated, and the wheel 3
The brake means 2 and 42 are released and the weights 35 and 45 are released.
Is released to be able to descend. The gravity of the weights 35, 45 is applied to the brackets 36, 46 via the wires 31, 41.
Since the forward movement of the bracket 46 is restricted by the guide rod 61 and the forward movement of the bracket 36 is restricted by the expansion regulating member 55,
The forward arrow 13 and the movable guide 14 are prohibited from moving forward in the initial position. By the operation of the motor 51 of the drive control device 5, the motor 51 rotationally drives the drive pulley 52 to cause the traveling band of the endless wire 54 to travel at a predetermined speed in the forward direction. The expansion restricting member 55 on the endless wire 54 advances at a predetermined speed, and the brackets 36 and 46, whose movement is restricted by the expansion restricting member 55 and the guide rod 61, advance together with the expansion restricting member 55. I do.

FIG. 5 is a new material supply process diagram showing the operation of the bar supply device 1 step by step. In the initial stage of the bar feeding operation shown in FIG. 5A, the feed arrow 13 and the movable guide 14 control the enlargement regulating member 55 by the torque (arrows T1 and T2) that reduces the gravity of the weights 35 and 45. Start moving down. The bar W accommodated in the movable guide 14 is
It is transported forward by the movable guide 14. In an intermediate stage of the bar feeding operation, the front end of the movable guide 14 approaches the main spindle S of the automatic lathe 2 and is inserted into the main spindle inner pipe I as shown in FIG. Movable guide 14
When the front end of the movable guide 14 approaches the collet chuck C, the forward movement of the movable guide 14 is stopped by stopping means (not shown). The motor 51 of the drive control device 5 includes a drive pulley 5
The rotation drive of No. 2 is continued, and the expansion regulating member 55 on the endless wire 54 is further advanced at a predetermined speed. Expansion control member 55
The bracket 36 moves the expansion restricting member 55
To follow the advance of The feed arrow 13 and the guide rod 61 are relatively displaced with respect to the movable guide 14 and move forward with the advance of the bracket 36. That is, the front end portion of the guide rod 61 projects forward from the front wall 46a of the bracket 46, and the feed arrow 13 moves forward entirely in the movable guide groove 15. The blade portion (bracket support portion) 23 of the feed arrow 13 is provided with a blade portion moving opening (top opening) 2.
1, the bar engaging portion 18 of the feed arrow 13 abuts against the rear end surface of the bar W and presses or urges the bar W forward. As a result, the bar W projects telescopically forward from the movable guide 14 and is inserted into the collet chuck C.

In the final stage of the bar feeding operation shown in FIG. 5C, the front end of the bar W penetrating the collet chuck C abuts against the cutting tool B functioning as a stopper and stops. The automatic lathe 2 closes the collet chuck C and starts a shortcut operation or a product processing operation. When shortcut processing or product cutting is performed on the tip of the bar W, the overall length of the bar W is reduced, and
Moves forward in relation to the operation of the automatic lathe 2. Feed arrow 13
With the advance, the expansion regulating member 55 abuts on the advance stop means (not shown) of the feed arrow driving device 3. The forward stop means is provided at a predetermined position of the bar feeder 1, for example, the wheel 32.
It is composed of a Doc abutment switch and the like arranged at a position adjacent to the lower part of the device. The forward stop means is connected to a control circuit or a control unit (not shown) of the drive control device 5 provided in the control panel 9, and the drive control device 5 connects the enlargement regulating member 55 and the forward stop means. By collision or abutment,
The most forward position of the feed arrow 13 is detected, and the motor 51 is reversed. Due to the reverse rotation of the motor 51, the running belt of the endless wire 54 runs in the retreating direction, and the expansion regulating member 55 on the endless wire 54 presses the bracket 36 rearward via the spring 56, and the feed in the movable guide 14 The arrow 13 is retracted. When the feed arrow 13 is retracted, the front end portion of the guide rod 61 is pulled backward from the front wall 46a of the bracket 46, and the nut 62 abuts on the front wall 46a of the bracket 46.

At a predetermined time, for example, when the processing of all the products that can be cut from the bar W is completed,
Following the retreat of 3, the motor 51 is driven to rotate in the reverse direction, and the enlargement regulating member 55 further retreats. The feed arrow 13 is pushed rearward by the retreat of the expansion regulating member 55, and the movable guide 1 is moved.
4, the wire 31 rotates the wheel 32 in the wire feeding direction, and the small-diameter reel portion 33 winds up the wire 34 and raises the weight 35. The bracket 46 of the movable guide 14 engaged with the nut 62 of the guide rod 61 is pulled by the feed arrow 13 via the guide rod 61 and retreats together with the feed arrow 13. Wire 41
Rotates the wheel 42 in the wire feeding direction, and the small-diameter reel portion 43 winds the wire 44 and the weight 45
To rise. When the movable guide 14 is restrained from retreating by the retraction restricting means of the bar feeder 1 and retreats to the last retreat position shown in FIG. 5A and FIG. , The motor 51 of the drive control device 5 is stopped, and the movable guide 14 and the feed arrow 13 stand by at an initial position where the bar supply mechanism 7 can supply the bar (new material) W ′. .

As described above, the bar feeder 1 of the present embodiment comprises:
A movable guide 14 capable of receiving a bar (new material) W 'at an initial position, a feed arrow 13 movably disposed in the movable guide 14, and pressing or attaching the feed arrow 13 and the movable guide 14 forward. The feed arrow driving device 3 and the movable guide driving device 4 for energizing, the drive control device 5 for controlling the forward movement of the feed arrow 13, and the guide connecting device 6 for restricting the relative movement between the feed arrow 13 and the movable guide 14. Have. Movable guide 14
The feed arrow 13 moves forward integrally with the bar W accommodated in the movable guide groove 15 in the initial feeding step.
Therefore, since the bar W protected by the movable guide 14 is inserted into the main spindle inner pipe I of the automatic lathe 2 without protruding forward from the movable guide 14, the bar W which may be generated during the bar feeding is removed. Damage, bending, bending or deformation, etc. are reliably avoided. The drive control device 5 and the guide connecting device 6 are provided with the feed arrow 1
3 and the movable guide 14 can be relatively displaced, so that the bar W projects telescopically forward from the front end of the movable guide 14 in the spindle inner tube I by the advance of the feed arrow 13 with respect to the movable guide 14. Is inserted through the collet chuck C. Further, the drive control device 5 and the guide connecting device 6
The feed arrow 13 and the movable guide 14 are relatively displaced, and the feed arrow 13 is retracted with respect to the movable guide 14, and the feed arrow 13 and the movable guide 14 are integrally retracted to the initial position.

[0020]

As described above, according to the above construction of the present invention, an automatic bar feeder capable of reliably and smoothly feeding a small-diameter bar, particularly an extremely fine bar, to an automatic lathe. And an automatic bar supply method can be provided.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view of a feed arrow and a movable guide shown in FIG.

FIG. 3 is a perspective view of a feed arrow and a movable guide shown in FIG. 1;

FIG. 4 is a partially enlarged sectional view of a feed arrow and a movable guide shown in FIG. 1;

FIG. 5 is a new material supply process diagram showing the operation of the bar supply device shown in FIG. 1 in a stepwise manner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic bar feeder 2 NC automatic lathe (bar processing machine) 3 Feed arrow drive 4 Guide drive 5 Drive control device 6 Guide connection device 7 Bar supply mechanism 8 Screw type feeder 11 Main frame 13 Feed arrow 14 Movable Guide 15 Movable guide groove 16 Fixed guide 17 Fixed guide groove W Bar W 'Bar (new material)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23B 13/02

Claims (4)

(57) [Claims] At the top there is a new material receiving opening for receiving the bar to be fed and until the front end is inserted into the spindle of the automatic bar processing machine. A movable guide provided so as to be movable forward in the bar feeding direction toward the automatic bar processing machine, whereby the bar accommodated through the new material receiving opening is the automatic bar. A bar feeder that is transported to a processing machine, and further presses the bar in the movable guide forward in the feeding direction, and feeds the bar into the main shaft forward in the feeding direction with respect to the movable guide. An automatic bar feeder for feeding bars to an automatic bar processing machine. 2. The movable guide includes a guide groove capable of accommodating a bar, and a front portion in a feeding direction of the guide groove forms a bar accommodating region capable of receiving the bar. The automatic bar feeder according to claim 1, wherein the rear portion in the direction forms a feed member disposition area in which the bar feed member can be disposed. 3. An automatic bar feeding method using the automatic bar feeding machine according to claim 1, wherein the bar to be fed is movable via a new material receiving opening provided at the top. A step of housing the guide in the guide, a step of moving the movable guide forward in the bar feed direction, into the main shaft of the automatic bar processing machine, and a step of transporting the bar to the automatic bar processing machine. A bar feeding step of pressing a bar in the movable guide forward in a feeding direction by a bar feeding member to cause the bar to protrude forward of the movable guide. Supply method. 4. The bar feeding member is disposed in the movable guide. In the bar feeding step, the movable guide advances integrally with the bar feeding member, and in the bar feeding step, 4. The automatic bar feeding method according to claim 3, wherein the bar feeder is advanced relatively to the movable guide to feed the bar forward in the feeding direction.