DE2141521A1 - ADJUSTMENT DEVICE FOR THE STROKE POSITION OF A MOVABLE TOOL - Google Patents

Description

9895 B / BT

Trumpf & Go company.

7ooo Stuttgart 51

Adjustment device for the stroke position of a tool that can be moved to and fro

The invention relates to an adjusting device for the stroke position of a reciprocable Tool, in particular a punching or nibbling punch with an adjustment device. The tools or their The stroke position must match the workpiece to be machined and so far

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emg ^ oogen on

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available to be precisely adjusted to a die.

Shortened by regrinding

their length so that the stroke position must be readjusted again afterwards. The same applies to exchanges an old tool for a new one, usually longer.

In the case of punching and nibbling machines, it is common to to designate the punch or nibbling punch, the die and the hold-down device as "the tool". There however, the invention is not directed exclusively to such tools on the one hand and to others the die and the hold-down are in the background in the present invention, is explained below In the case of nibbling and punching machines, the term tool only refers to the nibbling or punching die.

It is already known per se, the stroke position of a tool that can be moved back and forth by means of a Adjust adjusting device. However, this is done by hand, so that one can rely on the reliability and the ability of the adjuster is dependent.

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eiiKJ ^ üMen om

The object of the present invention now exists in automating this setting process so that it can be performed in a short time and with a large Precision can be performed

To solve this problem, an adjusting device is proposed which, according to the invention, thereby is characterized in that the adjusting device for automatic Hublageneins division with a stroke position checking device VerbundeEL is, with the checking device in the event of a setpoint deviation a Yerstellvorrichtungsantrieb operated and that the energy supply to the transmission test device and / ο which can be switched off or shut off to the adjustment device

How the adjusting device is designed is in itself of subordinate importance · It all that matters is that it has a drive device, for example an electric motor, via intermediate links the tool, its holder or a part that can be lifted with it in the in the same way the checking device can be designed as desired

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at the

All of the testing devices used for similar control tasks are embossed here. she can be optical as well as magnetic, electrical or electronic · In addition Pneumatic test devices and combinations of the above can also be considered. The verification facility must be able to determine the deviation of the actual value from an adjustable value in particular Determine setpoint and in a

to translate the corresponding signal. Of course, this must be done by the adjustment device to be understood and to be implemented in a correspondingly large adjustment movement. When using different Energy media for checking and adjusting must be appropriate. Transmitters are used.

When or after the tool is inserted into the machine tool, the checking device is switched on or put into action. If there is no setpoint deviation, the adjustment device receives no command and no stroke position adjustment takes place. If, however, the actual value is not identical to the target value, the adjustment device receives a message about this until the target value

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value deviation is zero. The adjusting device is therefore at a standstill simply because of the termination of the adjustment process. However, since the checking device would give an adjustment command to the adjusting device during subsequent work, the energy supply to the checking device and / or adjusting device must be switched off or shut off before the first working stroke. During the operation of a Hublagenüberprüfung is no longer necessary, as the tool wear in so keeps minimum _limits} ß d _a correction of the stroke position is totally unnecessary. Accordingly, as a rule, the energy supply to the checking device and / or adjusting device is only switched on or enabled again when a shorter, longer or different tool is used. As a matter of fact, it would already be sufficient to switch off or shut off the energy supply to the adjusting device alone, but it makes sense, for example in the case of pneumatic checking devices, to also cut off their energy supply at the same time or alternatively in order to avoid unnecessary costs.

In a particularly preferred embodiment of the

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entered

According to the invention, when the stroke position deviates from zero, the energy supply to the checking device and / or adjusting device is automatically switched off or the checking device and the adjusting device are automatically disconnected. This shutdown or disconnection prevents
that the adjusting device receives any further signals from the checking device until this shutdown process is reversed manually or by some automatic mechanism and the entire adjusting device is made ready for operation again.

A particularly expedient embodiment of the invention in this regard is characterized in that
that the tool in its final assembly position

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approached

Actuating device and the over checking device switches on, that is, with the complete on-S ',: h: i 3ben and locking the tool, the checking device is automatically put into action "and it automatically drives the adjusting device or issues the command in the event of a stroke position deviation ., for this purpose, therefore, is not dependent on the Arjiter operated at a waiver of / this part of the automatic lifting tomation '.- ^ eneinstellvorganges latter by the Betätifv -. ji (f, must initiate a switch.

Another embodiment of the invention, in which the tool holder or holder when changing tools assumes a predetermined change position, is characterized in that the checking device consists of a member movable with the tool and a member that is stationary relative thereto, wherein one of these members is designed as a switch or has a switch and this switch the energy supply to the adjusting device and / or checking device switches off if the stroke position deviates from zero. This means that the entire setting process can be carried out including the introduction of the same absolute

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building

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can be carried out fully automatically. The switch mentioned is located in the circuit of an electric motor an electric one. Adjustment device and it is normally closed The stroke position is opened automatically. Unless the adjustment device has a hydraulic or pneumatic motor, this switch is called hydraulic or Pneumatic switch trained and it locks correspondingly the compressed air or pressure medium supply. Of course, a combined electro-hydraulic or electro-pneumatic switches can be used., It is also possible to to switch contact-free with the help of a magnet. In order to rule out misunderstandings, it should be stated once again that that the switch just described is used to terminate the control process and with the shut-off or overriding the checking device and / or adjusting device by a another switch or another switching device has nothing to do. In addition, it has to be added be that with the automatic activation of the over he testing device and, if necessary, adjusting device Due to the tool used, a third switching device is also necessary in order to

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inputs on ... Mj.os .:

the override of the stroke position settings skin omatic to be carried out after completion of the control process * This circuit can, for example, with the on and The machine itself is switched off will.

The one link of the checking device is preferably by the tool or a movement-wise connected element and the other by a Photocell formed with light source and switch »As soon as the free end of the tool, for example enters the light beam and interrupts it, the control process and thus the stroke correction completed.

Another embodiment of the invention is thereby characterized in that the one link of the checking device from a switch and the other from a switch cam, switch finger, switch magnet or like. exists. The tool is moved until the switch cam or the like. The Switch operated, which does not necessarily have to be an electrical switch.

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According to a further embodiment of the invention consists of one link of the checking device one. Eneumatic switch, in particular an electropneumatic one Switch and from one. Blower nozzle or the like · and the other from a leading member · According to the corresponding automatic or manual activation, compressed air emerges from the nozzle. If the inflow member laterally, offset from the blower nozzle, so for example is arranged above or below it, the compressed air can flow out unhindered · This has a corresponding command to the "adjustment device result, which is maintained until the inflow member sits directly in front of the nozzle and thereby prevents compressed air from flowing out, or at least makes it more difficult · Related to this then a compressed air ans ti eg in the compressed air system, the again used to switch off the adjusting device and thus to terminate the adjustment process can be·

In the case of an adjusting device with a tool that can be driven via an eccentric and an associated connecting rod is in a further development of the invention, the motor of the adjustment device with a rotatable in the connecting rod

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stored connected to the eccentric receiving eccentric bushing. By twisting the latter -will the hub shifts to one side or the other. To perform the accordingly delicately to be able to is in a further embodiment of the invention between the eccentric bushing and the adjusting motor a worm wheel coupled to the bushing and a worm gear shifted.

In the drawing, various embodiments of the invention are shown partially ¹ schematically. Show it:

Figure 1 schematically shows a first embodiment of the adjusting device according to the invention,

Figure 2 shows the abbreviated representation of a second embodiment of the invention,

Figure 3 shows a third embodiment,

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Figure 4 shows a fourth variant embodiment of the invention,

FIG. 5 shows a simplified embodiment of the one shown in FIG 1 shown device,

Figure 6 is a side view of an adjusting device for the tool,

Figure 7 shows a section along the line VII-VII of the figure 6th

In the lower end of the in the direction of the double arrow 1 ram 2 that can be moved back and forth or up and down

5 a schematically drawn tool, for example a liibb el stamp inserted and not in a suitable manner as shown. Becomes a tool change the machine or its ram 2 stopped in each precisely predetermined position. Most of the time the Eccentric for the ram drive in its top dead center position. This then also takes the plunger 2 or the

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Tool 3 is in its upper end position when changing tools . By inserting the tool 3, the switch 4- is automatically actuated, which switches on the stroke position checking device 5 and applies voltage to the adjusting motor 6 for the stroke position of the tool. If the stroke position checking device 5 _5, the mode of operation of which will be explained later, detects a deviation of the stroke position from a desired and adjustable setpoint value, the adjusting motor 6 drives the drive for the stroke position adjustment of the plunger 2, which is not shown in detail in FIG. and actual value is zero. This then also reduces the distance between the punch 3 and a die (not shown).

A flow member 7 is located on the punch or tool 3 adjustable arranged. It is provided with a nose 8, which in Figure 1, the outflow opening 9 of a Blowpipe or a blower nozzle 1o closes or

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at least almost closed.

If the nose 8 is above or below the outlet opening 9, compressed air can come out of the blower nozzle 1o flow out unhindered. This is the case when the stroke position of the tool deviates from the target value. The motor 6 then changes the stroke position so long in the direction of a zero position of the difference between Setpoint and actual value until the nose 8 has reached the position shown in FIG. A pressure jam now arises in the pressure line 1o, which results in the switch 11 being actuated. The latter then interrupts the energy supply to the adjusting motor 6 on the one hand and to the stroke position checking device 5 on the other hand. These The interruption is also retained if the tool and thus also the hole 8 subsequently move moved up or down. The compressed air is generated in a pump 12, which is driven by the electric motor 13 serves. It is in via lines 14 · nlt

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Control cabinet 15 electrically connected, which controls the entire control, in particular also a program device for the machine tool, not shown, as well as all belonging to the setting device, not in detail contains items shown. Lines 16 connecting switch 11 and lines 17, the switch 4 with the Control cabinet 15. The connecting lines between the latter and the servomotor 6 are marked with 18. The connection of the control cabinet 15 has the reference number 19

As has already been explained, the inflow member 7 is fastened to the tool $ in such a way that it can be adjusted or adjusted. In manner not shown it has several of its lower edge various distances rabbits that $ e as needed can be brought into working position. It is also possible to turn the inflow member upside down, so to speak, in order to achieve a different height of the nose 8 from the tool 3. In this way it is possible that the nose is always about the same

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Distance to the free face or working surface of the punch. If this face is reground, it changes the length of the stamp. In the case of minimal changes in length, a correction of the nasal position is not necessary, however, the inflow member must then be changed in its position to the tool 3 when the latter through Regrinding has been reduced by too great an amount. The same applies in an analogous manner when inserting another tool with a greater or lesser length.

After working with the machine having the ram 2 and subsequent tool change is either automatically activated by the control cabinet 15 oder'but by hand the entire setting device again activated, so that with the insertion of another tool the whole process of checking the stroke position and if necessary, readjustment, which previously switched off automatically had been, comes back into operation by itself.

The switch 11 controlled by compressed air is located in FIG

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in the circuit of the motor 6 for the stroke position adjustment * As soon as the nose 8 closes the outlet opening 9 and thus causes the pressure to rise in the electrohydraulic switching device, this switch 11 opens the circuit of the drive motor 6 so that it comes to a standstill and thus the stroke position adjustment to the end comes. At the same time, the compressed air supply is then also cut off in a manner not shown, so that the subsequent Work of the tool 3 and the associated Release of the outlet opening 9 of the switch 11 can no longer be closed. Here, too, must be done in the same way after a later tool change the setting device can be reactivated in a suitable manner.

In the embodiment according to FIG. 4- the switch 11 is actuated directly by a switching cam 2o which can be moved with the plunger. In principle, this setting device works in a similar way to the pneumatic alternative, but the switch Λ ^Λ

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• As I said, here mechanically and directly through the ram or the switching cam 2o actuated «

A device analogous to the embodiment according to FIG is shown schematically in FIG. There, too, the switch 11 is activated when the correct stroke position is reached actuated or opened by the cam 2o. A switch 21 is also shown there, either by hand or via a relay of switching rank 15 can be closed or opened. In addition, a self-holding relay .22 is provided, its switch 2J keeps the circuit of the motor G closed even after the switch 21 has been opened. As soon as the switch 11 is opened by the switching finger 2o, the self-holding relay 22 drops out, so that the switch 23 is opened and the motor 6 even when the switch 11 closes later during the working stroke of the plunger 2 receives no power. The latter is only the case when the switch 21 is closed again, so that that too Self-holding relay 22 picks up again. In this case, the motor will of course only start if there are no lifting

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There is a positional deviation, i.e. the switch 11 is closed is.

FIG. 2 shows the monitoring of the stroke position of the tool 3 by a light source 24 with a converging lens and a photocell 25 with a corresponding unspecified shown switching device. The mode of operation is again the same, i.e. as soon as the light beam 26 is interrupted by the lowermost end 27 of the tool 3, the switching device belonging to the photocell 25 opens the circuit 28 of the motor 6 of the stroke position adjustment device. The locking and reactivation takes place in the same way as with the other design variants.

A pinion 3o is placed on the shaft 29 of the adjusting motor 6 and meshes with a gear 31 Right-hand thread and the other left-hand thread. One turn

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of the pinion 3o therefore has an extension or a shortening the effective length of the parts 32 and existing plunger result. The eccentric shaft is denoted by 36, while the connecting rod is number 37 wearing.

In FIG. 7, the bore 38 of the metal sheet 37 is a Eccentric bushing 39 used. It is rotatably mounted and with a driving pin 4o a drive wheel rotatably mounted on the eccentric shaft 36 41 connected. For this purpose, the latter has a groove extending in the radial direction 42, in which the free end of the driver pin 4o engages. The drive wheel 41 is designed as a worm wheel and is driven by a worm 43, which in turn is connected to the motor 6 of the adjustment drive.

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Claims (8)

Expectations 1.) Setting device for the stroke position of a back and forth movable tool, in particular a punching or liibb el stamp s, with an adjusting device, characterized in that the adjusting device for the automatic setting of the stroke position has a stroke position checking device (5) is connected, the checking device in the event of a setpoint deviation an adjusting device actuator (6) is actuated and that the energy supply to the checking device and / or can be switched off or locked to the adjustment device. 2. Adjusting device according to claim 1, characterized in that ■ there is a zero deviation of the stroke position the energy supply to the checking device and / or adjusting device (6, 4-3, 41, 39, 3o, 31) automatically is switched off or the checking device and the adjusting device are separated. - 22 - 309812/00 0 5 2H1521 3. Adjusting device according to claim Ί or 2, characterized in that the tool (3) in its final assembly position the adjusting device (6.4-3.41.39? 3 °? 31) and the verification device (5) turns on. 4. Adjusting device according to one or more of the 'preceding claims, wherein the tool holder or holder assumes a predetermined change position when changing tools, characterized in that the checking device (5) from the tool (3) or one movable therewith (7, 2o) and one that is stationary relative to this. Member (9) consists, wherein one of these members is designed as a switch or has a switch (11) and this switch the energy supply to the adjustment device and / or checking device in the event of a zero deviation the stroke position switches off. 5 · Adjusting device according to claim 4, characterized in that that one link in the review - 23 309812/0005 direction through the tool (3) and the other through ■ a photocell (25) with light source (5) and switch ' (11) is formed. 6. Adjusting device according to claim 4, characterized in that that one link of the checking device from a switch (11) and the other from a switching . cams (2o), shift finger. Switching magnet or the like. Is. 7. Adjustment device according to claim 4, characterized in that that one link of the checking device from a pneumatic switch, in particular an electropneumatic switch Switch (11 a) and a blower nozzle or the like. (Io) and the other from a flow member ■ (7) exists. ' 8. Adjusting device according to claim 7 *, characterized in that that the inflow member (7) is attached to the tool (3) in a height-adjustable manner. - 24 - ■ ■ · 2H1521 9- adjusting device according to claim 7 or 8, characterized characterized in that the inflow member (7) has at least two in the stroke direction (1) or in the stroke direction and transversely has inflow lugs (8) arranged offset thereto and rotatable and / or displaceable and / or reversible on the Tool (^) is attached. 1ο, setting device according to one or more of the preceding Claims with a tool that can be driven via an eccentric and an associated connecting rod, characterized in that that the Kotor (6) of the adjusting device with a rotatably mounted in the connecting rod (37), the eccentric receiving eccentric bushing (59) is connected. 11. Adjusting device according to claim 1o, characterized in that between the eccentric bushing (59) and Verijt-ciJinotor {uj a from a with the excise bushing (! "■ j) gol'uri el i en worm wheel ('H) unu finer »Mc Im ach ο (<'l5j lif! i.-fljriKiai Gf-iric'lu- gor-ch / il 1 el · irt ·. 8 1 ■ / / nn ί f. BAD ORJGJMAL