JPH06312336A - Bar feeder - Google Patents

Abstract

PURPOSE:To feed a work piece previously cut in a desired length to a machine tool, and prevent noise. CONSTITUTION:A supporting plate 22 is placed on a cutting unit rail 21. A pusher 25 is provided vertically movably to this supporting plate 22. A driving roller 29 driving a bar and a driven roller are arranged. Main and sub vice devices 35 and 36 are provided on the supporting plate 22. A stopper plate 42 is arranged in a stopper unit, and a limit switch 41 operated by the stopper plate 42 is arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar material feeder, and more particularly to a bar material feeder which cuts a bar material to a desired length and supplies it to a machine tool.

[0002]

2. Description of the Related Art Generally, a bar feeder is widely known as a device for feeding a workpiece to a machine tool such as a lathe.
In this bar material feeder, a large number of bar materials are stocked on a material storage device as disclosed in, for example, Japanese Patent Application No. 1-28762, and the bar materials are shaken one by one from the material storage device. It is fed into the stopper and the rear end of the bar is gripped by the feed pipe.

Further, the tip of the bar is held by the main shaft of the machine tool and rotates at a high speed, and the anti-vibration device uses a plurality of rollers to move the bar from around it so that the bar does not whirl during rotation. Hold it. The feed pipe is driven every time the tip portion of the bar is finished and the steady rest is opened to feed the bar to the machine tool in fixed lengths. Thus, the bar is processed with a constant length while rotating with the main shaft.

[0004]

However, in the above-mentioned rod feeder, since it supports a long rod which rotates at a high speed, vibration is caused by bending of the rod or the like. There are cases. This vibration causes various troubles such as noise. Further, if the rotational speed of a lathe or the like is reduced in order to reduce this vibration, productivity will decrease. Furthermore, processing progresses,
When the rod becomes short, it is discarded. It is desirable that the rod to be discarded has a short length, but the rod feeder described above requires a certain length.

The present invention has been made in view of the above-mentioned problems, and by supplying a work material which is pre-cleaved and cut to a desired length, vibration due to bending of a bar material is generated. It is an object of the present invention to provide a bar feeder that can prevent and shorten the length of a bar to be discarded.

[0006]

SUMMARY OF THE INVENTION The present invention stores a bar material,
A material storage device that sends out this bar material, a cutting unit that receives the bar material sent out from this material storage device, and cuts into a workpiece piece by cutting it at a predetermined length, and the cut workpiece piece. A carrier device that grips and conveys the workpiece piece to the machine tool unloading position, a workpiece piece unloading device that receives the workpiece piece carried by the conveyor device, and unloads the workpiece piece to be sent to the machine tool, and the cutting unit. And a stopper unit that is provided in the vicinity of the rod member and that stops the conveyance of the bar material, and the cutting unit is mounted on the support table that is provided so as to be movable in the longitudinal direction of the bar material. Having a vise device for fixing the bar at the time of cutting and a cutting machine for cutting the bar; the cutting unit having a conveying member for conveying the bar in the longitudinal direction; Up The cutting unit is movable between a projecting position projecting on the upper surface of the support and a storage position housed in the support, and has a pusher movable in the longitudinal direction of the bar; The moving distance of the rod of the unit in the longitudinal direction is approximately twice the moving distance of the above-mentioned carrier.

[0007]

Function: One bar stock stored in the material storage device is supplied to the cutting unit. The bar material supplied to the cutting unit is transported by the transport member. Then, the support base is moved in the longitudinal direction of the bar, and the position of the cutting machine is set to a desired cutting position. Along with the movement of the support base, the transfer device moves by a distance of about half the movement distance of the support base. In this state, the bar is fixed with the vise device, and the cutting machine is operated to perform the cutting work of the bar. After that, the fixing state of the vise device is released, the work material formed by cutting the bar material by the carrying device is grasped, and delivered to the work piece piece unloading device. Further, the work piece delivered to the work piece piece unloading device is sent to the machine tool. At this time, since the moving distance of the carrying device is about half the moving distance of the support base, the position of the workpiece to be gripped by the carrying device is approximately at the center, and the carrying operation is stable.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a bar feeder according to the present invention. Reference numeral 1 in the drawing denotes a bar material supply shelf, and a spindle 2 is rotatably provided between the bar material supply shelves 1 and 1. The take-out levers 3 are fixed to the support shaft 2. Further, at the lower end of the tip of the bar material supply shelf 1, two bar material pedestals 4 and 4 are arranged, and a bar material pedestal support base 5 which is vertically movable is provided. Further, a cutting unit 6 is provided below the bar support 4 so as to be movable in the axial direction of the bar. The cutting unit 6 is provided with a band saw cutting machine 7.
A chain 8 is provided in the cutting unit 6, and the chain 8 is stretched around the cutting unit driving gears 9, 9. A column 10 is erected on the side of the cutting unit 6, and a chain 11 is provided on the column 10.
The chain 11 is stretched around strut driving gears 12, 12, and the strut driving gear 12 and the cutting unit driving gear 9 are configured to be rotated by a motor 13 at the same time. Further, the number of teeth of the cutting unit driving gear 9 is set to be about twice the number of teeth of the strut driving gear 12. A clamp device 14 is provided on the column 10 so as to be vertically movable. A delivery shelf 15 is provided at an appropriate position above the clamp device 14 and corresponding to the material loading position of the machine tool, and the workpiece placed on the delivery shelf 15 is delivered to the machine tool side. A delivery pusher 16 is provided. Reference numeral 17 in the figure is a stopper unit that stops the axial movement of the bar.

FIG. 2 is a front view of the cutting unit 6. Reference numeral 21 in the drawing denotes a cutting unit rail, which is laid long in the left-right direction in the drawing on the bottom plate portion of the bar feeder. The linear slide portions 22a, 22a of the support plate 22 are engaged and placed above the cutting unit rail 21.
On the right upper surface of the support plate 22 in the drawing, a sprocket 23,
A chain 24 is provided via 23. A pusher 25 is fixed to the chain 24. The pusher 25 is engaged with a pusher rail 26 that is vertically movable with respect to the support base 22. As the pusher rail 26 moves up and down in the figure, the pusher 25 also moves up and down in the figure. Further, in FIG. 3, one sprocket 23 is provided with a pusher motor 27, and the chain 24 is operated via the sprocket 23 by the operation of the pusher motor 27. Further, in FIG. 2, reference numeral 28 is a pusher unit elevating cylinder for vertically moving the pusher 25 and the like. In FIG. 3, two drive rollers 29, 29 are provided on the left side of the pusher 25 in the drawing,
Two driven rollers 30, 30 are arranged at positions facing the drive rollers 29, 29. Drive roller 29,
A drive roller motor 32 is connected to 29 via a gear 31. Further, the driven rollers 30, 30 can be moved in the vertical direction in the figure by the feed roller clamp device 33. A detection sensor 34 is provided on the right side of the drive roller 29 and the driven roller 30 in the figure, and detects the rear end of the bar. Further, a main vise device 35 and a sub vise device 36 are disposed on the left side of the drive roller 29 and the driven roller 30 in FIG. 3, and a cutting operation is performed between the main vise device 35 and the sub vise device 36. The cutting blade 37 of the band saw cutting machine 7 is positioned as shown in FIG.

Further, in FIG. 2, a stopper unit 17 is arranged on the left side of the cutting unit 6 in the figure, and a limit switch 41 and a stopper plate 42 for operating the limit switch 41 are provided in the stopper unit 17. Is provided. Further, a topcut cylinder 44 for moving the topcut plate 43 in the left-right direction in the drawing is provided. Further, a stopper vise device 45 is provided above the stopper plate 42 in FIG.

The operation of the bar material feeder having the above structure will be described in detail below. In FIG. 1, a bar 51 is placed on the bar supply shelf 1. At this time, the protrusion 1a of the bar material supply shelf 1 is prevented from rolling down. Then, as the support shaft 2 rotates, the take-out lever 3 rotates, and one bar 51 rolls and is placed on the bar support 4. When the bar 51 is supplied to the bar receiving base 4, the bar supporting base 5 is lowered. And in FIG.
The bar member 51 is disposed between the driving roller 29 and the driven roller 30, and the feed roller clamp device 33 operates to move the driven roller 30 and the rod member 51 is clamped to the driving roller 29 and the driven roller 30. (Fig. 4
(A)). At this time, the stopper plate 42 of the stopper unit 17 has entered the inside of the sub vice device 36. In this state, the drive roller motor 32 (FIG. 3)
Is operated and the drive roller 29 is rotated, the bar member 51 moves leftward in FIG. When the bar 51 comes into contact with the stopper plate 42 and the limit switch 41 operates, the drive roller motor 32 (FIG. 3) stops, and the bar 5
The movement of 1 stops. Then, the main vice device 35 is operated to clamp the bar 51, and the feed roller clamp device 33 (FIG. 3) is operated to separate the driven roller 30 from the bar 51 (FIG. 4B). Further, the stopper plate 42 is returned to the fixed position. In this state, the band saw cutting machine 7 (FIG. 1) is operated to perform the top cutting work. Again, the driven roller 30 is brought into contact with the bar 51, the main vice device 35 is separated from the bar 51, and the bar 51 is moved to the left in FIG. 5A. The tip of the bar 51 is the stopper plate 4.
The bar 51 is stopped from moving by coming into contact with 2 and actuating the limit switch 41. In this state, the stopper vise device 45 is operated to fix the tip of the bar 51 (FIG. 5 (a)). Further, the driven roller 30 is separated from the bar 51. In this state, the motor 13 is operated in FIG. Then, the cutting unit driving gear 9 operates and the printing unit 6 moves in the direction of arrow A in FIG. 1 as the chain 8 moves. At the same time as this movement, the strut driving gear 12 moves, so that the strut 10 also moves in the direction of arrow A in FIG. At this time, the cutting unit driving gear 9 and the strut driving gear 12
Since the ratio of the number of teeth to is 2: 1, the moving distance of the cutting unit 6 is about twice the moving distance of the support column 10. In this state, the bar 51 is fixed by the main vice device 35 and the sub vice device 36 as shown in FIG. Then, the band saw cutting machine 7 (FIG. 1) is operated to cut the bar 51. After that, as shown in FIG. 6A, the sub vice device 36, the stopper vice device 45, and the stopper plate 42 are separated from the work material 52 obtained by cutting the bar material 51. After being clamped by the clamp device 14, the workpiece 52 is lifted while being clamped upward in FIG. 1 and placed on the delivery shelf 15. Here, this clamp position is determined by the moving distance of the cutting unit 6 and the support 10
Since the moving distance is 2: 1, it is almost the central portion of the work material 52. Then, the work material 52 is supplied to the machine tool (not shown) such as a lathe by the delivery pusher 16. On the other hand, in the state where the bar 51 is fixed by the main vise device 35, the motor 13 is operated in FIG.
The cutting unit 6 is moved in the direction of arrow B in FIG.
(B)). Then, the main vise device 35 is separated from the bar 51 and the driven roller 30 is brought into contact with the bar 51. The drive roller 29 is operated to move the end of the bar 51 to a position where it abuts on the stopper plate 42. Then, the stopper vise device 45 clamps the end of the bar 51 (FIG. 5A). Then, the cutting operation of the bar 51 is performed by the same operation as described above.

On the other hand, the cutting work is sequentially performed, and the bar 51
2 reaches the rear end, and in FIG.
When the rear end of 1 is detected, the pusher unit elevating cylinder 28 operates to lift the pusher 25 upward in the figure. Then, the pusher motor 27 is operated to move the pusher 25 through the sprocket 23.
The bar 51 is moved to the left in the middle. As a result, the bar 51 can be reliably transported.

[0013]

As described above, according to the present invention, the cut material can be supplied to the machine tool and the noise can be prevented. Further, since the cutting unit moves within the main body of the bar material feeder, it is not necessary to secure a space for moving the stopper unit, and the overall size of the device can be reduced. Further, since the rear end portion of the bar material is reliably conveyed by the pusher, the bar material can be effectively used up to the last minute. Further, since the moving distance of the transporting device is approximately half the moving distance of the cutting unit, the material to be processed can be clamped at a substantially middle portion in the length direction, which is effective.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a bar feeder according to the present invention.

FIG. 2 is a front view of a cutting unit used in the bar feeder according to the present invention.

FIG. 3 is a plan view of a cutting unit used in the bar feeder according to the present invention.

FIG. 4 is an operation explanatory view of a cutting unit used in the bar feeder according to the present invention.

FIG. 5 is an operation explanatory view of a cutting unit used in the bar feeder according to the present invention.

FIG. 6 is an operation explanatory view of a cutting unit used in the bar feeder according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bar material supply shelf (material storage device) 6 ... Cutting unit 7 ... Band saw cutting machine (cutting machine) 10 ... Struts (conveying device) 14 ... Clamping device (conveying device) 15 ... Shelving for delivery (delivery of workpiece piece) 16) Sending pusher (workpiece piece unloading device) 22 ... Support plate (support table) 25 ... Pusher 29 ... Drive roller (conveying member) 30 ... Followed roller (conveying member) 35 ... Main vise device (vice device) ) 36 ... Sub Vise Device (Vise Device) 45 ... Stopper Vise Device (Vise Device) 51 ... Bar Material 52 ... Work Material (Workpiece Piece)

Claims (4)

[Claims] 1. A material storage device for storing a bar material and sending the bar material, and a cutting unit for receiving the bar material sent from the material storage device and cutting the bar material into pieces each having a predetermined length. And a conveying device that grips the cut work piece and conveys it to the machine tool unloading position, and receives the work piece conveyed by the conveying device and discharges it so as to send it to the machine tool. A workpiece piece unloading device,
The cutting unit is provided near the cutting unit, and includes a stopper unit for stopping the conveyance of the bar, and the cutting unit is mounted on the support, which is provided so as to be movable in the longitudinal direction of the bar. In addition, a bar material feeder having a vise device for fixing the bar material at the time of cutting and a cutting machine for cutting the bar material. 2. The bar material feeder according to claim 1, wherein the cutting unit includes a carrier member for carrying the bar material in the longitudinal direction. 3. The cutting unit is movable between a projecting position projecting on the upper surface of the support base and a storage position housed in the support base, and further comprises a pusher movable in the longitudinal direction of the bar. The bar material feeder according to claim 1 or 2, characterized in that. 4. The bar feeder according to claim 1, wherein a moving distance of the cutting unit in the longitudinal direction of the bar is about twice as long as a moving distance of the conveying device.