JPH0253501A - Rod material feeder - Google Patents

Abstract

PURPOSE:To make preliminary machining of the end of a rod material unnecessary and perform unattended machining of the rod material by utilizing a mechanism for transferring the rod material from a stack section to a feed section also for feeding and discharging the rod material to and from a machining section so that the end of a next rod material is machined during the feed of the rod material at the rod material feed section. CONSTITUTION:A rod material 13 is placed on a stack table 8 and urged by its own weight against a stopper 9. When a tilted plate 34 is raised, a foremost rod 13a is pushed up and rolls to a stopper 35. When the tilted plate 34 is lowered, the rod material is placed on a V-block and gripped by a grip unit 17. After an end 13b is machined, the unit 17 returns to the original position. When the machining of the rod material previously fed to a feed section 2 is finished and a feed device returns to the original position, the tilted plate 34 is raised to raise the rod material 13a from the V-block 11 and rolls the material to a recess 36 at the end of the titled plate 34, and a next rod material from a stack section 4 is placed at the position of a center stopper 35 of the titled plate 34. When the tilted plate 34 is lowered, the rod material 13a is separated by a guide 42 from the recess 36 and dropped to the feed section 2, the next rod material 13 is placed on the V-block 11, and the rod material 13a, with its end gripped by the feed device 6, is fed to an NC lathe.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bar supply device for automatically supplying a bar to a lathe or other turning machine through a center hole of a spindle.

(Prior Art) A bar supply device having a structure for pulling the remaining material back toward the feeder and discharging it requires a feeding device equipped with a gripping claw for grasping the terminal end of the bar. On the other hand, it becomes necessary to process one end of the bar material to be supplied by an apparatus having such a structure to match the diameter of the gripping claw. There is a well-known end face processing machine for bars that processes the end of the bar into a predetermined shape by inserting one end of the workpiece into a workpiece insertion hole, and conventionally this end face processing machine is used to supply the bar to a bar supply device. The end of the bar was being processed.

Further, a bar supply device having a structure that includes a stack section for storing bars to be processed and that sequentially takes out and automatically supplies the bars from the stack section is also widely used.

(Problems to be Solved by the Invention) If processing is performed using a combination of a bar supply device equipped with the stack section and an NC lathe equipped with a discharge chute for processed products, unmanned work can be performed for a long time. However, manpower is required to process the end of a bar using an end face processing machine, and completely unmanned processing is impossible. Of course, it is not technically impossible to install a robot for loading and unloading workpieces into the end face processing machine and a stacker for storing the supplied bar material, but this would result in a problem in which the cost of automation would become extremely high. There is.

This invention has been made to solve the above problems, and its object is to provide a rational and economical technical means that can realize completely unmanned continuous processing of bar materials.

(Means for Solving the Problems) The bar supply device of the present invention includes a feed section 2 that rotatably supports a bar 13, and a stack that stores juxtaposed bars while urging them toward the feed section 2. section 4, and a processing section 3 located between the stack section and the feed section. The feed section 2 is provided with a feeding device W6 having bar gripping claws, and the stack section 4 is provided with a stopper 9 at the end on the side of the feed section. The processing section 3 is provided with a pedestal 11 that supports the bar material, and a turning blade 23 that is mounted so that its axes coincide with each other so that it can rotate freely relative to each other and can freely approach and separate from it.
．． 24, 25 and a pair of material gripping claws 27 are provided. Intermittent transfer means 32, 34, 35, 61 for simultaneously transferring the bar material 13 between the stack section 4 and the processing section 3 and between the processing section 3 and the feed section 2 are provided.

In the device of the first embodiment, the pedestal 11 is a swing table that can be raised and lowered, and the pedestal 11 of the second embodiment is a simple pedestal installed in a fixed position. Another possible structure for the cradle 11 is a structure in which a bar is supported by a plurality of holder pieces that advance and retreat synchronously in the radial direction. In the first embodiment device,
A collet claw is used as the material gripping claw 27, and the collet claw 27 moves in the axial direction and feeds the bar material into the height tip 23, 24, 25 which is rotationally driven at a fixed position. In the device of the second embodiment, a vise claw with a V-shaped gripping surface is used as the material gripping claw 27, and the end of the bar is machined by a rotating and axially moving bit tip 23.2.4.25. be done.

Further, in the illustrated embodiment, a mechanism consisting of a swinging arm 32, an inclined plate 34, an intermediate stopper 35, a swinging plate 61, etc. is used as the intermittent transfer means for the bar material, but other structures include a mechanism for feeding the bar material in the normal direction. It is also possible to use an intermittent rotating wheel or a chain provided with claws, and if a square bar is sometimes used as the bar material, it is also suitable to have a transport element that repeats upward, transverse, downward, and reverse transverse movements.

(Function) A large number of rods are stored in the star rim section 4 in a state where the most advanced rods are in contact with the stopper 9 and are arranged side by side. In one operation of the intermittent transfer means 32, 34, 35, 61, the most advanced one is sent to the processing section 3, and the bar stock in the processing section 3 is sent to the feed section 2. Therefore, the next bar remains on the pedestal 11 of the processing section 3 until all the bars of the preceding feed section 2 have been processed. During this time, the bar in the processing section 3 is gripped by the bar gripping claws 27, and the rotating turning blades 23, 24, 25 come relatively close to the gripped bar and process the end of the bar, and after machining, The turning blades are spaced apart. The bar whose end has been processed and is transferred to the feed section 2 by the next operation of the intermittent transfer means is gripped by the bar gripping claw of the feeder 6, and is then transferred from the tip side by the transfer operation of the feeder. It is sent to the lathe one by one. The remaining material that cannot be fed into the lathe is pulled out from the main shaft of the lathe when the feeding device 6 returns, and the material gripping claws of the feeding device 6 open and are discharged below the feed section 2.

Through the above operation, the ends of the bars loaded in the stack section 4 are automatically processed one after another and fed into the feed section 2, and there is no need for a separate process to process the ends of the bars, and the ends of the bars are automatically processed. There is no time loss at all.

(Embodiment) In FIGS. 1 to 6 showing an embodiment of the present invention, 1 is a frame of the apparatus, 2 is a feed section, 3 is a processing section,
4 is a stack section. The feed section 2 is provided with a half-split support tube 5 that rotatably supports the bar and a feed device 6 that moves within the support tube 5. The feed device 6 grips the base end of the bar. It has internal gripping claws. Since various structures of the support tube 5 and the feeding device 6 are known, details thereof will be omitted.

The stack section 4 has a stack stand 8 that is inclined so that the feed section 2 side is lower, and a stopper 9 is provided on the feed section side. The stack stand 8 and stopper 9 are
It is formed by the upper edges 10a of the plate members 10 arranged side by side.

The processing section 3 is located between the feed section 2 and the stack section 4, and includes a plurality of cutting tables 11 arranged parallel to the feed section 2.
is formed. The cutting table 11 is mounted so as to be movable up and down by a height adjusting device 12, and is adjusted so that the axis of the loaded bar 13 is always at a constant height.

15 is a machining unit provided at the axial end of the machining section 3;
6 is a rail provided on the frame 1 in the axial direction of the processing section 3;
7 is a gripping unit slidably mounted on the rail 16;
18 is a hydraulic cylinder that moves the gripping unit 17 along the rail 16. The processing unit 15 includes an electric motor 1
9, a disk 20 rotationally driven by this electric motor 19;
It consists of a tool rest 21.22 which is movably and fixedly attached to the radial groove of the disc 20, and a cutting tool tip 23, 24, 25 fixed to the tool rest 21.22. Bit tips 23 and 24 are provided facing each other to balance the cutting force, and bit tip 25 is used to chamfer the processed end.
is added.

Furthermore, the gripping unit 17 includes a collet pawl 27, a sleeve 28 for opening and closing the collet pawl, and a hydraulic cylinder 29 for advancing and retracting the sleeve, and the sleeve 28 is integrated with a piston 30 of the hydraulic cylinder 29.

Reference numeral 32 denotes an arm pivotally attached to the plate material 10 forming the stacking table with a pin 33, 34 an inclined plate integrated with the arm, 35 an intermediate stopper provided at the upper edge of the inclined plate, and 36 a recess at the tip of the inclined plate. , 37 is a fork formed at the tip of the arm 32, 3
Reference numeral 8 denotes a lifting bar that is loosely fitted to the fork 37. Reference numeral 39 is a hydraulic cylinder mounted on the frame 1, and the lifting bar 38 is fixed to the rond end of the hydraulic cylinder 39. The inclined plate 34 has an upper edge 3 inclined in a direction in which the feed section 2 side is lowered.
4a and 34b, and is moved up and down by swinging around the bin 33 by a hydraulic cylinder 39. 40 is a deviation prevention guide provided to surround the processing section 3 from below, 41 is a first guide for dropping the bar into the processing section 3, and 42 is a second guide for dropping the bar into the feed section 2. 4
0.41.42 are integrally formed on the upper edge of the plate material 10 forming the stack portion.

Next, the operation of the device of the first embodiment will be explained. The bars to be fed are loaded with their ends in contact with the positioning temporary 8a at the end of the stacking table 8, and are urged by their own weight against the stopper 9 at the end on the feeder side on the inclined stacking table 8. (Figure 2).

When the inclined plate 34 rises, the first bar 1 of the stacking platform 8
3a is pushed up by the inclined plate 34, disengages from the stopper 9, and rolls to the position of the intermediate stopper 35 (FIG. 5). Next, when the inclined plate 34 moves downward, the bar 13a locked to the intermediate spacing 35 is guided by the first guide 41 and placed on the cutting table 11 of the processing section (see Fig. 3). and Figure 6). The cutting table 11 is adjusted by a height adjusting device 12 so that the center of the bar placed thereon is at a height that coincides with the axes of the gripping unit 17 and the processing unit 15.

When the bar 13a is transferred to the processing section 3, the processing unit 1
The gripping unit 17 that had moved to the 5 side is collet claw 27
Move to the bar 13a side in an open state. End of bar 1
3b passes through the gripping unit 17, the collet claw 2
7 closes and grips the bar 13a (imaginary line in FIG. 4).

Next, the gripping unit 1-17 advances to the processing unit 15 side, and the terminal end 13b of the bar is processed. After finishing the machining, the gripping unit 17 returns to the position where it grips the bar 13a, opens the collet claw 27, and returns to the machining unit 15 side.

Then, when the processing of the bar material previously supplied to the feed section 2 is completed and the feed device 6 returns to the home position at the end of the feed section, the inclined plate 34 rises, and the processing section 2
Lift the bar 13a from the bending table 11 and transfer it to the recess 36 at the tip of the inclined plate (imagination vA in Fig. 5), and move the next bar from the stack section 4 to the position of the intermediate stopper 35 of the inclined plate 34. and lead. Then, when the inclined plate 34 moves downward, the bar 13a is locked by the second guide 42, detached from the recess 36, and is dropped into the feed section 2 (imaginary line in FIG. 6). At the same time, the next bar 13 is placed on the cutting table 11. The bar 13 fed into the feed section 2 is held at its end by a gripping claw built into the feeding device 6, and fed into an NC lathe (not shown) by the forward movement of the feeding device 6 (movement to the left in FIG. 1). . The next end processing of the bar 13 is
This is done while a is in the foot section 2.

By repeating such operations, the bars loaded on the stack section 4 are automatically fed one after another and processed.

FIG. 7 and FIG. 10 are diagrams showing a second embodiment of the present invention, and only the structure of the parts that are different from the first embodiment are shown. In this second embodiment, a high-speed steel claw 27 shown in FIG. 7 is used as a material gripping claw, and this vice claw is provided on the stacking table 8. Therefore, the gripping unit provided in the first embodiment is not provided, and as shown in FIG. .

That is, the bar 13 transferred to the processing section 3 is held in the same position by the vise claws 27, and the processing unit 15 approaches the gripped bar and processes its terminal end 13b, and brings it to the position of the light after processing. End processing is performed by the return operation. The structure of the processing unit 15 itself is similar to that of the first embodiment.

The bite claw 27 is slidable on the pedestal 11, and its gripping surface is V-shaped with an apex angle of 120 degrees. It's growing. Two bite claws 27 are provided facing each other, and a hydraulic cylinder 52 and a #J1 mechanism 53 shown in FIG. 8 are provided to open and close the claws. One end of the high-speed steel claw 27 is fixed to the rod 54 of the hydraulic cylinder 52, and the other end is fixed to the cylinder itself. The synchronization mechanism 53 is composed of link levers 57 and 57 of equal length whose base ends are pivotally connected by pins 56 set in the vice claws 27, and the bins 56 at the base ends are guided by horizontal elongated holes 58. It has a structure in which a roller that is pivoted to a pin 59 at the tip connecting both link levers is guided by a vertical guide 60. The bar 13 transferred to the processing section 3 either falls onto the cradle 11 or is scooped up by the rake face 51 when the vice claw 27 closes.
■The shape is lifted up to the valley of the gripping surface and gripped.

Therefore, regardless of the diameter dimension of the bar 13, the bar 13 is kept at a constant height.
3, and is particularly suitable for gripping round bars and hexagonal bars. If a vise claw with a gripping surface with an apex angle of 90 degrees is used, a structure suitable for gripping a round bar or a square bar can be obtained.

FIG. 10 shows the intermittent transfer means of this second embodiment. In addition to the arm 32 having the same structure as the first embodiment, a swinging plate 61 that interlocks with the arm 32 is provided. has a structure in which it is pivoted by a pivot pin 62 located on the feed section 2 side,
The bar material is transferred from the stack section 4 to the processing section 3 by the vertical swinging motion of the arm 32, and is transferred to the processing section 3 by the vertical swinging motion of the swing plate 6I.
It has a structure in which it is transferred from the feed section 2 to the feed section 2. Arm 3
2 and the swing plate 61 are interlocked by a fork 37 at the tip of the arm and a pin 63 set on the swing plate 61, and a hydraulic cylinder 39 for raising and lowering these is mounted on the swing plate 61 side. The operation of the intermittent feed device of this second embodiment is not particularly different from that of the first embodiment, but it has the feature that the inclination angle of the transfer path from the processing section 3 to the feed section 2 can be made larger, and The transportation of bars becomes smoother.

(Effects of the Invention) The bar supply device of the present invention sequentially processes the ends of the bars in the stack section and supplies them to the feed section, so there is no need for a step of processing the ends of the bars in advance, and the bars are completely processed. It becomes possible to process bar materials by unmanned operation.

A processing section is arranged between the stack section and the feed section, and the bars are supplied to and discharged from the processing section using a mechanism for transferring the bars from the stack section to the feed section. Since the end processing of the next supplied bar material is performed during the feeding of the bar material in step 1, the additional cost for the end processing is extremely low and there is no loss of time due to the end processing.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figures 1 to 6 show a first embodiment of the present invention. Figure 1 is a plan view of the entire device, and Figure 2 is a view taken from the X section in Figure 1. 3 are enlarged views of the processing section, FIG. 4 is a cross-sectional side view of the main part of the processing section, and FIGS. 5 and 6 are explanatory diagrams of the intermittent transfer operation. 7 and 10 show the second embodiment, FIG. 7 is a diagram corresponding to FIG. 3 of the first embodiment, and FIG. 8 is an enlarged side view showing the synchronization mechanism of the material gripping claws. , FIG. 9 and FIG. 10 are diagrams corresponding to FIG. 4 and FIG. 2 of the first embodiment, respectively. In the figure, 2: feed section 3: processing section 4 stack section 6: feed device 9: stopper 11: pedestal 13: bar material 23, 24, 25: bite tip (turning blade) 27: material gripping claw 32: arm 34 : Inclined plate 61 : Swing plate 35 : Intermediate stopper

Claims (1)

[Claims] a feed section (2) that rotatably supports a bar (13);
The feed section (2) includes a stack section (4) that stores juxtaposed bars while urging them toward the feed section (2), and a processing section (3) located between the stack section and the feed section. is provided with a feeding device (6) equipped with bar material gripping claws, the stacking section (4) is provided with a stopper (9) at the feed section side end, and the processing section (3) is provided with a feeding device (6) that supports the bar material. and turning blades (23), (24), (23), (24), (23), (24), (
Intermittent transfer means (32), (34) are provided with a pair of material gripping claws (25) and material gripping claws (27), and simultaneously transfer the bar material between the stack section and the processing section and between the processing section and the feed section. ,
A bar supply device comprising (35) and (61).