DE2063075C3 - Automatic bar loading magazine for a multi-spindle automatic bar lathe - Google Patents

Description

The invention relates to an automatically working bar loading magazine for a multi-spindle automatic bar lathe, consisting of a rotatably mounted and rotatably connected to the spindle drum coaxially to the spindle drum Loading drum in a guide frame one of the number of those stored in the spindle drum Rotary spindles carries a corresponding number of hinged guide tubes that are attached to the spindles align the spindle drum, a bar feeding and separating device and a front Pushing device for the bars in the loading position of the multi-spindle automatic lathe, its hollow turning spindles encompassing the fed rods have feed tongs and in its work space is provided in front of the Drehspindei in the loading position pivotable rod stop is, whereby for the actuation of a bar feeder magazine control limit switch use Find.

A well-known bar loading magazine of this type (special print from "Maschinenmarkt", Vogel-Verlag. 76th year, issue 16, from February 21, 1970, p.! to 6) has the disadvantage that when a Malfunction in the drive mechanism of the magazine further working of the automatic turning machine not possible. In addition, a subsequent attachment of the well-known bar loading magazine is already available existing machines either not possible at all or at least with great difficulty connected.

The invention is therefore initially based on the object of providing an automatically operating bar loading magazine to create that can also be retrofitted to existing machines without any significant modification work can be grown and in the event of malfunctions in the drive mechanism also a manual feed of the material bars.

The solution to this problem is that the feed device for the Rods from a slide which can be displaced by a spindle driven by a motor consists of a plunger that is longitudinally displaceable connected to a control rod and shared with this is removably arranged, wherein the control rod is guided in a clamping sleeve and after Exceeding an adjustable frictional resistance can be moved into an end position in which by contacting one arm of a two-armed lever mounted on the slide of the limit switch can be actuated for the return of the slide while in the path of the slide and can be actuated by this itself in front of the reversal point of the carriage and in front of another Limit switch to secure the end position for the slide path a switch for a short time Stopping the motor is provided for the slide movement.

This configuration of the bar loading magazine enables the automatically working Rod feeder also a manual feed of the material rods, so that the The machine itself can continue to work undisturbed. The 5 further advantage of the bar loading magazine according to the invention consists in the fact that it can also be carried out afterwards without any significant renovation work Can be built on existing multi-spindle automatic lathes of various types. In addition, io the bar loading magazine according to the invention simple in structure and therefore inexpensive to manufacture.

In a preferred embodiment of the Stanaenlademagazins on the side of the slide track facing away from the spindle drum, a control rod and the plunger returning to their output stop is provided and the position of this stop is the position of the limit switch for switching off the carriage feed ^ in this end; _aee assigned "

⁸ In order to be able to feed polygonal profile bars with the help of the bar loading magazine according to the invention, a creep speed gear is arranged behind the bar loading magazine, the shaft of which, which passes through the center of the bar loading magazine, can be coupled to a central shaft of the multi-spindle automatic lathe to drive the turning spindles. Furthermore, in the rear ends of the rotary spindles, spring-loaded profile bushings are longitudinally displaceable to a limited extent and non-rotatably relative to the rotary spindles ii

Fig. 15 is a schematic longitudinal sectional acid ^ a Stangenzuführeinrichtung and a ™ ^ _n del automatic lathe for processing

y _V it XVII

The drawing is an exemplary embodiment, one According to the invention, St.ngenl.demag.zins incurs-SCnQUllCnt.

Fi g ^ei l ^{gt is} the schematic front view of a multi-spindle automatic bar lathe with a bar loading magazine designed according to the invention,

F i g. Figure 2 is a schematic view against the exterior Front of the bar loader magazine,

Fig. 3 and 4 front views of the device for opening and closing the rod guide tubes

gen,. , hj _n t _e re

Fig. 16 a longitudinal section ^through £ ^{n α} _h

End of a hollow rotating spindle of the Autonwic »

Fig. 15,
FIG. 17 shows a section according to that in FIG. 16.

According to Fig. 1 and 2, behind the J * derl of a six-spindle automatic lathe e Bar feeder arranged, cue sex "> . ^ gene guide tubes 3, which in z * ·

to the spindle drum 4 of the machine arenuu _B gertcn, for example disk or ^s 'f " ^ carriers are arranged and the-B'""- stands from the Tvommel axis of rotation like you have the drum mounted spindles.

The Stangenführungsrohre3 s.nd> ^Lan% f "f halved, and that each is a Rohrhai te (F i g. 5 and 6) rigidly connected to the supports" ™ ^nt while the other Rcftrh M ^ ξ see 5 e.ner to each attached in the forenvahnt rotatably mounted rod 6 s.nd

At one end every 6 «t a Heo

strengthens, stored in the fork shape of Bf ™ ™ J% ^ ^e , st. Au a. · Para el to ren 3 extending Headangle 9 uoer ^e pair of wheels 10 having a width of 1 8 zwertη JP ^eK

^^^^^^^^^ Ά, the at D ^ ehunj der WeIJe 9ein Panning ^ es Hebds 7

^^ S Ä from the pipe

4 °

^^ d ^ Snu ^ ch Fig.3 towards ,, F ig. 6 shows the arrangement according to FIG. 4 in the direction; FIG. 7 shows the position of the rod pusher before a new material pipe is pushed into the feed gripper and the collet chuck of a hollow ^ ^d ! ^d ^ precedence after Fig,, Ver HeM 7 is in ^ J ^ ^ ig. 3 »jd 5 shown th ^^^^^ Jg ™ ^^. _To 32 en joint ^ nes ^ pipe execution ^

this / .weck is in atm ^ u y " _{el to this} em

for example on the rod 6 and jner ^ araiw duri end Stan ge "neb ^ ^{s d} ^ ^{m" e} _s ^D _{song 13 be} S _F errzahnen W ^ ™ ^ * ^ _Κ "ρρ-fung member 13 -. · constantly un- the effect of a

prestressed,? f ^ ^au ^ S ^C _c ^k £ "uf the shaft II a role ¹ ^ ' ^d ' ^e '" ^ ^ e'ch an au, d ^

fixed curves r ™ ^{1 1} J «g · _(en

'i ^ ί the engagement of the

_be effective

Remnants of the previously processed material

Recesses 71

F ^ .9 the position of the device according to Fig. 7 and 8 when the inserted material bar hits the bar stop of the machine,

Fi g. 10 and 11 are partial views of the rod pusher according to FIG. 7 to 9 on a larger scale,

Fig. 12 is a schematic front view of the ar-

Äessas « X Sr ^

Jg J pans are secured. öXna of the shaft 11 rolls the roller 15 ^ h of the drum 17 and causes £ ^! ^Γ ^ lid 13

14, so

the work space according to FIG. 12,

14 is a partial front view of a multi-spindle automatic lathe with a workpiece collecting device,

In the displacement area of the clutch hood 13 is ^{arranged lm} ^ 18, which the

de ⁸ _S Drchau.omats

prevented as long as the ratchet teeth 131 of the coupling member 13 are not in the recesses 71 of the
Lever 7 are engaged.

The shafts 9 and 11 with the control cams 12 and
the curve of the cam drum 17 are in the frame
Feeding device stored stationary and only
simply provided, choosing the rods 6 and 16 in
are attached to the supports of the rod guide tubes
and thus together with those arranged on it

The drive motor of the pusher device is switched off for a short time, the remaining length of the piece a ' in the collet 35 is ejected and the motor 30 is switched on again until the inserted 5 material bar α against a stop 36 provided in the working area of the machine and meanwhile pivoted in front of the rotating spindle in the loading position bumps. As the slide 26 continues to advance, the ram 23 and the control levers 7 and the coupling members 13 of a rod 25 will act on the rod 25 after overcoming the material clamping bush pivoted further by the subsequent spindle position. The frictional resistance in the slide 26 decreases

According to FIG. 2, the rod guide tube is pushed over, the control rod 25 having a rod magazine 19 arranged against its ren 3, the rear edge of which lever 37 is made of the lever 37 shown in FIG. 7. Outlet shaft 191 next to the guide tubes 3 15 8 and 10 in the rest position shown in Fi g. 9 lies above and above the shaft 11. This shaft is pivoted in position, which thereby actuates a limiter of an electric motor 20 via a worm 21 tongue limit switch 38, which drives the drive motor in such a way that it switches off with each loading 30 and thus carries out the further advance of the process one revolution. On the shaft 11 slide 26 prevents. For ^zusätz; .chen security are fixed at certain intervals discs 22, 2c of the carriage 26 is still arranged to directly lower the end of the run-out boundary limit switch 43 in the shifting area, the zoom range of the Anschachtes 191 and at its periphery each
have a recess for receiving a material rod α . Through these disks 22 is each
a material bar α removed from the magazine 25
and fed to the guide tube 3, which is open in the loading position.

Behind the guide tube 3 in the loading position is a device for pushing in the
this pipe fed material rod into the 30
The tube is aligned with the hollow rotating spindle of the machine. This device has according to
F i g. 7 to 11 a plunger 23, which is through a
Arm 24 is rigidly connected to a control rod 25
and just as this is effected in a slide 26 limited 35 of the push-in device, is mounted so as to be longitudinally displaceable. In the event of malfunctions in the rod feeder, this carriage 26 is

Mitteli = a lead nut 27 on a steep-running direction, the plunger 23 and the lead screw 28 provided with this thread and on the connected control rod 25 after prior loosening of the adjusting screw 40 running parallel to this spindle 28 out of the slide 26 ^ - rod 29 are drawn in the longitudinal direction of the rod guide 40. It is then easily possible. tubes arranged to be movable back and forth. The new bars of material are driven by hand through the lead screw 28, as shown in FIG. 1, by a
Electric motor 30 via a reduction gear 33.

The control rod 25 is not directly in a
Drilling of the slide 26, 45 made of metal
but in a plastic plastic clamping sleeve
39 stored, which according to F i g. 11 between the lower part of the carriage 26 and a pivotable with
This connected upper part 261 by means of an adjusting screw 40 and on the shaft of this screw are attached to 50 fabric rods with the screw conveyor getting into the screw conveyor, arranged disc springs 41 more or less strong and possibly damage it, can be pressed against the control rod 25. 12 and 13 in the lower part of the working space

As a result, the control rod 25 can only be an up and down collecting chute 46 unc after overcoming the through the clamping bushing 39 a collecting trough 47 for the remaining rod pieces the frictional resistance acting on them is seen differently. Folding up and down the slide 4 < ben. takes place by a pneumatic control element 48. da:

For ramming of the guide tube 3 befindli- again in manner known per se electrically ge chen material rod in the α is taxed in the loading position.

The machine’s sensitive hollow turning spindle is used for the The front end pieces of the material rod

Motor 30 switched on, causing spindle 28 in 60 to be known to be faulty. In order to avoid rotation and the carriage 26 with the fact that the first ram 23 from the outer workpieces shown in FIG. 7 is not moved between the end position produced later in the position shown in FIG. 8 and workpieces arrive is shown in Fig 14 is inserted below a Registered α the material rod known in the feed clamp 34 itself workpiece slide 49 a plant and the collet 35 of a rotary spindle of the car 65 piece-collecting container 50 in the horizontal plane be formats. As soon as it is supported displaceably at this feed limit, the slide 26 is coupled with a pneumatic movement to the switch 42 located in its vertical control element 51 and hits the switch 42 located in a sliding area, the vertical partition 501 becomes a relatively large one

The drive motor 30 of the pusher also switches off if, for example, there is no material rod α in the rod guide tube.

When the limit switch 38 is actuated by the lever 37, not only is the advance of the slide 26 switched off, but its return movement is switched on at the same time. Ser return movement pushes the control rod 25 avf a fixed stop 44, thereby ^to: - - at the end '' ~ ύ. G ~ the F i 7 and output position shown 10 is moved back Once that is done, meets ώ ·> carriage 26. to a limit switch 45. which in turn switches off the drive motor ^ O

Slide 26 to introduce the hole provided for the plunger 23 into the tubes 3, so that the machine continues can work.

Most multi-spindle automatic lathes for processing bar stock are well known equipped with a screw conveyor to divert the chips from the work area.

In order to avoid that the remnants of the workpiece

Collection space 502 and a smaller collecting space 503 is subdivided. The larger collecting space 502 is used to receive the workpieces that arise during ongoing production, while the smaller collecting space 503, on the other hand, is used to collect the first workpieces cut from the bars.
For loading a rotating spindle of the machine that is in the loading position, a known material limit switch causes the bar feed to be switched off. At the same time, the machine sends a control signal to the memory of the program control of the bar feeder. The motor 20 is now switched on for the duration of one revolution of the shaft 11, as a result of which the lever 7 is unlocked by running the roller 15 of the coupling element 13 on the ascending path of the cam disk 17 and into the position shown in FIG. 6 is pivoted, in which the guide tube located behind the rotating spindle located in the loading position is opened. During the rotation of the shaft 11, the workpiece bar, which had been lying in the bulges of the disks 22 until then, is inserted into the half 31 of the guide tube and, at the end of the rotation, the lever 7 is returned to the position shown in FIG. 3 and 5 pivoted back and locked again by the coupling member 13. The guide tube is therefore closed again. Now the stop 36 is swiveled out of the area of the rotating spindle in the loading position and the collecting chute 46 is folded down at the same time.

This is followed by the push-in device according to FIG. 7 to 11 the insertion of the material bar in the rotating spindle in the loading position until the rod is a few millimeters out of the Collet of this spindle protrudes. The push-in device is now briefly stopped, until the remainder of the bar has fallen out of the collet chuck 35 and over the folded-down collecting chute 46 in the drip pan 47 has reached. Then the collecting chute is folded up again and the rod stop 36 is pivoted again in front of the work spindle which is in the loading position. In the subsequent further forward movement of the pusher is the material rod up against the stop 36 advanced. As soon as the material bar hits the stop 36, the Control pulse triggered for the retraction of the pusher device. As soon as the slide of the pusher the in F i g. 7 and 10 reached the end position shown, the motor 30 is switched off and at the same time a control pulse is given to restart the machine.

The control signal previously given to the memory of the program control becomes like this stored for a long time until the first workpiece of the newly fed bar reaches the spindle position in which it is tapped. The workpiece bin 50 now becomes that shown in FIG

ίο Position shifted to the right so that that of the The first workpiece, which is cut off, falls into the smaller compartment "503. Then the collecting container 50 moved back again into the position shown in FIG. 14, so that the subsequently cut workpieces be funded in the larger subject 502.

In order to use the feed device described also profiled, for example hexagonal In order to be able to feed bar material, the installation of an additional device is necessary, which allows the precise position Feeding the profile bars into the correspondingly profiled feed and collet chucks of the machine enables. For this purpose, according to FIGS. 15 to 17, there is a creep speed drive device provided for the central shaft 54 of the machine. This drive device consists of a through the center of the feed device 2 passed shaft 55, one with the outer end of this Shaft coupled creep speed gear 56 and one between the facing ends of the Coupling 57 arranged on shafts 54 and 55.

Furthermore, in the rear end of each spindle 58 is a spring 59 which is under the action of a spring Profile bushing 60 arranged by a clamping screw 61 against undesired rotation is secured in the spindle 58.

Before inserting a profile rod c into the rotating spindle equipped with a profile bushing 60 must first the central shaft 54 of the machine is switched off by releasing the clutch 62 from the main drive and the creep speed can be switched on by engaging the clutch 57. After turning on the creep speed, the profile bar c is countered by the plunger 23 of the push-in device the outer end face of the spring-loaded profile bushing 60 which rotates slowly with the rotary spindle 58 pressed, which at first yields under tension of the spring 59 until the position of the profile bushing 60 corresponds to the position of the fed profile rod c and the latter thus through the bushing 60 in the spindle and the tongs arranged in it is pushed.

For this purpose 2 sheets of drawings

Claims (5)

2 075 claims: 1. Automatically working bar loading magazine for a multi-spindle automatic bar lathe, consisting of a loading drum arranged coaxially to the spindle drum, rotatably mounted and non-rotatably connected to the spindle drum, which carries in a guide frame a number of hinged guide tubes corresponding to the number of rotating spindles mounted in the spindle drum align with the spindles of the spindle drum, a bar feeding and separating device as well as a feed device for the bars in the loading position of the multi-spindle automatic lathes, whose hollow spindles have feed tongs surrounding the fed bars and in its working space a bar stop that can be swiveled in front of the rotating spindle in the loading position is provided, and that limit switches are used to actuate a bar loading magazine control, characterized in that the feed device for the bars consists of one through a vo A motor (30) driven spindle (28) has a slide (26) which can be pushed forward and which is connected to a control rod (25) so as to be longitudinally displaceable and which can be removed together with the control rod (25) (39) and, after an adjustable friction resistance has been exceeded, can be advanced into an end position in which, by contacting an arm of a two-armed lever (37) mounted on the slide (26), the limiting endshaker (38) can be actuated for the return of the slide (26) is, while in the path of the carriage (26) and can be actuated by the carriage itself in front of the reversal point of the carriage (26) and in front of a further limit switch (43) to secure the end position for the carriage path, a switch (42) for briefly stopping the motor ( 30) is provided for the slide movement. 2. Automatically working bar loading magazine according to claim 1, characterized in that on the side of the slide track facing away from the spindle drum, a control rod (25) and the plunger (23) returning to its starting position stop (44) is provided. 3. Automatically working bar loading magazine according to claim 1 and 2, characterized in that that the position of the stop (44) the position of a limit switch (45) for switching off of the slide feed is assigned in this end position. 4. Automatically working bar loading magazine according to claim 1 for the supply of polygonal profile bars, characterized in that a creep speed gear is behind the bar loading magazine (56) is arranged, which passed through the center of the bar loading magazine Shaft (55) with a central shaft (54) of the multi-spindle automatic lathe for driving the Rotary spindles (58) can be coupled. 5. Automatically working bar loading magazine according to claim 1 for feeding _{polygonal profile bars, characterized in that m} the rear ends of the rotating spindles (58) spring-loaded profile sleeves (60) are limited .angsverschiebbar and rotatably mounted with respect to the rotating spindles (58).