JPH0688165B2 - Material supply control method and apparatus - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material supply control method and apparatus, and particularly to material supply control when supplying a bar material from an automatic bar feeder to a headstock moving type automatic lathe. A method and apparatus. And
INDUSTRIAL APPLICABILITY The material supply control method and apparatus of the present invention are particularly suitable for use when supplying a fine bar material of an NC automatic lathe for moving a headstock back and forth at high speed from an automatic bar material feeder. is there.

(Prior Art) Conventionally, in the case of an NC automatic lathe that feeds a bar stock from an automatic bar feeder to a headstock moving type automatic lathe and processes the bar stock while moving the headstock back and forth, gripping the bar stock In order to cause the feed bar to follow the movement of the bar material caused by the forward movement of the rotating headstock, a constant thrust force is applied to the bar material from the rear of the feed bar in the automatic bar feeder. Here, when the headstock that grips the bar is moving quickly, especially when high-speed rapid feed is performed to reduce the non-cutting time, the feed bar provides the speed required to follow this. You have to increase the thrust force,
The feed bar is driven via an endless chain or endless belt.The weight is heavy and the diameter ratio of the pulley is increased, or the motor is rotated at high speed to obtain the high-speed movement of the feed bar required to follow the speed. Was there.

(Problems to be solved by the invention) In recent years, in the case of NC automatic lathe, since there are many processes, the loss time generated during the machining cycle, that is, the non-cutting time is large compared to the cam type, so the loss time is reduced. As a means, the movement of the headstock during the non-cutting time has been made as fast as possible, that is, high-speed rapid feed has been performed.
Therefore, as described above, when giving the high-speed movement of the feed-in bar sufficient to follow the high speed of the headstock, no problems occur when the headstock moves forward, but the headstock moves backward. When you do, that is, when you move backward,
The material will push back the feed bar against the strong force due to the pressing force and inertial force from the feed bar,
In particular, a long bar made of a thin material lacks rigidity, and it is impossible to push the feeding bar back, so that the bar is bent.

The object of the present invention is to interlock the movement of the headstock of an automatic lathe of the headstock movement type with the movement of the feed bar of the automatic bar feeder, and selectively disengage the interlocking movement to thereby achieve the above-mentioned drawbacks. It is an object of the present invention to provide a material supply control method and apparatus that solve the above problems.

(Means for Solving the Problems) In order to achieve the above-described object, the present invention provides a method for controlling material supply when supplying material from an automatic bar feeder to an automatic lathe of a moving headstock. , A control method that allows the movement of the headstock of the automatic lathe and the movement of the feed bar of the automatic bar feeder to be interlocked, and the interlocking can be selectively engaged and disengaged. In a device for controlling material supply when supplying material from an automatic bar feeder to a headstock moving type automatic lathe, a headstock movement transmission means coupled to the headstock of the automatic lathe and moving according to the movement. And a feed bar driving means that is coupled to a feed bar of the automatic bar feeder and moves in the axial direction, and the headstock movement transmitting means and the feed bar driving means are selectively connected to move the headstock. Send in sync The material supply control device is characterized in that it has an engagement / disengagement means for making the saw bar movable.

(Example) Next, this invention is demonstrated with reference to drawings.

FIG. 1 is a schematic side view showing a first embodiment of the present invention, FIG. 2 is a plan view of an essential part of the first embodiment, and a third embodiment
The figure is a schematic side view of the essential portions of a second embodiment of the present invention.

In FIGS. 1 and 2, the NC automatic lathe 10 is a bed.
A headstock 14 that is movable back and forth with respect to 12 is provided, and in the front of the headstock, a guide bush 16 and a guide bush 16 that guide a rod that penetrates the headstock and projects to the front are provided.
It has a column 19 having a plurality of cutting tools 18 for cutting at the mouth. The headstock 14 has a main shaft (not shown) rotatably provided therein, and a chuck (not shown) for holding a material at the tip of the main shaft. Automatic lathe
The bed 12 of 10 is provided with sprocket wheels 22 and 24 of the same diameter provided in parallel to the moving direction of the headstock 14, and an endless chain 26 is hung on these sprocket wheels 22 and 24, A part of the endless chain 26 is fixed to the headstock 14 via the connection fitting 20.

Here, the sprocket wheels 22 and 24 and the endless chain 26, or the rack 60 and the pinion 62 described later are coupled to a headstock of an automatic lathe and constitute a headstock movement transmission means that moves according to the movement thereof.

On the other hand, behind the headstock 14, a bar material 58 and a feeding bar 56
Bar feeder with the bar positioned on the center line of the spindle
40 has sprocket wheels or pulleys 48, 50 of the same diameter provided in parallel to the moving direction of the headstock 14 at both ends of a frame 46 supported by support legs 42, 44, and these sprocket wheels or pulleys are provided. Endless chains or endless belts 52 are hung on 48 and 50. A feeding bar 56 is fixed to a part of the endless chain or the endless belt 52 via a connecting fitting 54.

The feed-in bar 56 is fitted in a material feed pipe 57 shown by an imaginary line, and a bar member 58 projects forward through the material feed pipe 57.

Where the aforementioned sprocket wheel or pulley 48,
50 and endless chain or belt 52
Is a feed bar driving means that is connected to the feed bar of the automatic bar feeder and moves the feed bar in the axial direction.

The shaft 25 of the sprocket wheel 24 provided at the rear of the pair of sprocket wheels 22 and 24 described above is connected to the shaft 31 of a coaxial sprocket wheel 30 via an electromagnetic clutch 28.
, While the frame of the automatic bar feeder 40
Of the pair of sprocket wheels or pulleys 48, 50 provided on 46, the sprocket wheel or pulley 48 on the side closer to the automatic lathe 10 has the sprocket wheel 32.
Is fixed, and an endless chain 34 is hung between the sprocket wheels 30 and 32.

Here, the endless chain 34 and the electromagnetic clutch 28 described above, or the timing belt 68 and the electromagnetic clutch 28 described later selectively connect the headstock movement transmission means and the feed bar driving means to synchronize with the movement of the headstock. Thus, the engaging / disengaging means that makes the feeding bar movable is configured.

On the other hand, a sprocket wheel or pulley 50 provided at the rear end of the frame 46 of the automatic bar feeder 40 is provided with a reduction gear motor (not shown) that allows the feed bar 56 to move independently in the axial direction. It is provided so as to be disengageable via a clutch (not shown).

The electromagnetic clutch 28 that engages / disengages the movement of the headstock 14 with the sprocket wheel 30 and the electromagnetic clutch (not shown) that engages / disengages the drive of the motor (not shown) with the sprocket wheel or the belt 50 are turned on / off alternately, and one electromagnetic When the clutch is turned on, the other electromagnetic clutch is operated to be turned off, and the feed bar 56 is always connected to one of the movement of the headstock 14 and the driving of a motor (not shown).
Further, in the present embodiment, the electromagnetic clutch 28 is configured to operate in conjunction with opening and closing of the chuck of the spindle, and when the spindle chuck is closed, the feed bar 56 interlocks with the movement of the headstock 14 and the spindle. When the chuck is open, the feeding bar 56 can be independently moved by the rotation of a motor (not shown).

With this configuration, for example, when the spindle chuck is closed and the electromagnetic clutch 28 is turned on, when the headstock 14 moves back and forth, the movement is transmitted to the endless chain 26 via the connection fitting 20, Further, the endless chain 34 is attached through the sprocket wheel 24 and shaft 25, the electromagnetic clutch 28, the shaft 31 and the sprocket wheel 30.
Be transmitted to. The movement of the endless chain 34 is further transmitted to the endless chain or the endless belt 52 via the sprocket wheel 32, the sprocket wheel or the pulley 48, and further to the feeding bar 56 via the connecting fitting 54. That is, the movement of the feeding bar 56 of the automatic bar feeder 40 is performed in conjunction with the movement of the headstock 14 of the automatic lathe 10, the grip is held by the chuck of the spindle, and the rear end is held at the tip of the feeding bar 56. The rod 58 moves in the axial direction of the spindle together with the feed bar 56 in conjunction with the movement of the headstock 14, and no axial force is applied to the rod.

In addition, the chuck of the spindle is open, and the electromagnetic clutch
When 28 is off, no motion is transmitted from the sprocket wheel 24 to the sprocket wheel 30, so that the headstock 14 or the feed bar 56 can be moved independently of each other to feed a bar or to add a new bar. It is possible to replace it with wood.

In this way, the movement of the headstock 14 and the movement of the feed-in bar 56 can be selectively engaged and disengaged, so that the headstock 14 can be moved when necessary, for example, during a machining cycle in which a rod is gripped by a spindle chuck. And the feed bar 56 are interlocked with each other, and during the non-machining cycle in which the spindle chuck is open, for example, when one part is finished and the material is fed from the automatic bar feeder 40 to the automatic lathe 10, When the remaining material is pulled out from the automatic lathe 10 and a new bar material is supplied after the processing of one bar material is completed, the interlocking can be disconnected and the feeding bar 56 can be independently moved.

In FIG. 3 showing the second embodiment, a rack 60 is fixed to the headstock 14 and a pinion 62 is meshed with the rack 60 as headstock movement transmission means. The shaft of the pinion 62 is connected to the shaft of the timing gear 64 via the electromagnetic clutch 28, and the timing belt 68 is the timing gear 68.
It is hung on 64 and a timing gear 66 to form an engaging / disengaging means. A sprocket wheel or a pulley 48, which is a feed bar driving means, is fixed to the shaft of the timing gear 66. Since the other construction of the automatic bar feeder is almost the same as that of the first embodiment, detailed description thereof will be omitted. Also in the second embodiment, as in the first embodiment, the interlocking of the movement of the headstock 14 and the movement of the feed bar 56 can be selectively engaged and disengaged.

Although the present invention has been described based on the preferred embodiments, the present invention is not limited to these embodiments. For example, instead of the electromagnetic clutch, any suitable means for selectively transmitting motion such as a mechanical clutch can be used, and the means for selectively transmitting motion is not limited to the places shown in the embodiments. , Can be placed at any appropriate position.

In the embodiment, as a means for transmitting motion,
Although endless chains and sprockets wheels, endless belts and pulleys, timing belts and gears have been described as used in particular locations, these means can be used in any suitable location.

Further, in the material supply control method and apparatus of the present invention,
Not only fine rods but also rods of ordinary diameter can be applied.

(Effects of the Invention) As described in detail above, the present invention is configured so that the movement of the headstock and the movement of the feed-in bar can be selectively interlocked, so that the thrust force is applied to the bar during the machining cycle. Since the headstock and feed-in bar work together without giving the headstock, even in an NC automatic lathe that moves the headstock at a fast speed, it is necessary to move the headstock even if it is a bar with a normal diameter Since the rod can be moved without bending, the headstock can be moved at a sufficiently high speed to shorten the non-cutting time and provide an efficient automatic lathe.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a first embodiment of the present invention, FIG. 2 is a plan view of an essential part of the first embodiment, and a third embodiment
The figure is a schematic side view of the essential portions of a second embodiment of the present invention. 10 …… Automatic lathe, 14 …… Spindle head, 22,24 …… Sprocket wheel, 26 …… Endless chain, 28 …… Electromagnetic clutch, 30,32 …… Sprocket wheel, 34 …… Endless chain, 40 …… Automatic Bar material feeder, 48, 50 ... Sprocket wheel or pulley, 52 ... Endless chain or belt, 56 ... Feed bar, 58 ... Bar material, 60 ... Rack, 62 ... Pinion, 64, 66 ... … Timing gear, 68 …… Timing belt.

Front Page Continuation (72) Inventor Kenji Sugimoto 4-6-17, Momoi, Suginami-ku, Tokyo (56) References

Claims (7)

[Claims] 1. A method of controlling material supply when supplying material from an automatic bar feeder to an automatic lathe of a headstock moving type, comprising: moving a headstock of an automatic lathe and feeding bar of an automatic bar feeder. A material supply control method, which is capable of interlocking with movement and selectively engaging and disengaging the interlocking. 2. When the bar is gripped by the spindle, the movement of the headstock of the automatic lathe and the movement of the feed bar of the automatic bar feeder are interlocked, and the bar is not gripped by the spindle. The material according to claim 1, wherein the feeding bar can be independently moved by disconnecting the interlocking between the movement of the headstock of the automatic lathe and the movement of the feeding bar of the automatic bar feeder. Supply control method. 3. A device for controlling material supply when supplying material from an automatic bar feeder to a headstock moving type automatic lathe, the main shaft being coupled to the headstock of the automatic lathe and moving according to the movement. A table movement transmitting means, a feeding bar driving means coupled to a feeding bar of an automatic bar feeder and moving in an axial direction, a spindle movement transmitting means and a feeding bar driving means are selectively connected to each other to form a spindle. A material supply control device, comprising: an engagement / disengagement means capable of moving the feeding bar in synchronization with the movement of the table. 4. A motion transmitting means for connecting the headstock movement transmitting means and the feed-in bar driving means by the engagement / disengagement means to transmit a motion from the headstock movement-transmitting means to the feed-in bar driving means, and The material supply control device according to claim 3, further comprising: a clutch device that selectively engages and disengages motion transmission. 5. The material supply control device according to claim 4, wherein the clutch means is an electromagnetic clutch. 6. The headstock movement transmitting means is interlocked with the movement of the headstock, the feed bar driving means is an endless flexible strip interlocked with the movement of the feed bar, and the engaging / disengaging means is the headstock. The material supply control according to claim 3 or 4, which is an endless flexible strip wound between the movement transmission means and the feed bar driving means, and an electromagnetic clutch. apparatus. 7. The headstock movement transmitting means is a rack connected to the headstock and a pinion driven by the rack, and the feed bar driving means is an endless flexible strip linked to the movement of the feed bar. 4. The engagement / disengagement means comprises an endless flexible strip wound between a headstock movement transmission means and a feed-in bar drive means and an electromagnetic clutch. The material supply control device according to item 4.