DE1552727A1 - Stroke adjustment device for the tables of machine tools - Google Patents

Description

PATENTANWÄLTE 1552727 8902 augsburg-göggingen, 5.5.66

v. Elchendorff Street 10

DR.! NG. E. LIEBAU our reference Dr.Lb/r Az 6 W 6127

DIPING. G. LIE BAU ^{(in response to an additional} Your sign

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Machine tool factory Adolf Waldrich Coburg 8630 Coburg / Bavaria Hahnweg 16

Stroke adjustment device for the tables of machine tools

The invention relates to a stroke adjustment device for the tables of machine tools »

There are Hubeinstellvorrichtungen for machine tools known at which a rack is arranged on the table, which is in a stations arranged drive pinion of a reduction gear engages.

In another device, the position transmitter (actual value transmitter) via a low backlash reduction gear with the last gear one Table or slide adjustment gear coupled. However, this device requires a mechanical table drive and is consequently not universally transferable to other e.g. hydraulic drives with cylinder and piston. Both facilities are disadvantageous felt the fact that the transformation of the lift truck ——ο . — _ L 4f

° which, for example, can be more than 10 m in planing machines ^ au to

ÜÜ the limited length of a display scale in the control panel with J

v. poor reduction gears must be done. On the one hand, this is the

~ * Adjustment device "relatively expensive and also yours

- ¹ ^ accuracy due to the accuracy of the low-backlash reduction gear

Telephone 33795 Telegr.-Adr.j ILfATSNT Posttxhedckcito MOnihen 845 iO DautjQie Sank .AufiJburji Kto. ^ 83419 M

BATH ORIGINAL

limited. In addition, the facilities of the type mentioned the stroke length with reference to the S position sensor in the reduction gear transformed in such a way that the entire stroke length is approx. 170 angular movement is crowded together. However, this means that practically for everyone Stroke length the translation of the Beduction must be different, .. in order to always be able to use this full angular range and not to reduce the setting accuracy by the fact that the entire table movement is transformed to a smaller angular range.

The purpose of the present invention is to provide a stroke adjustment device for the tables of machine tools, which allows a high setting accuracy with a simple structure. This is inventive

he

according to achieved by having at least one straight line tax at the table curve (control ruler) is arranged, the control surface extends obliquely to the direction of movement of the table and that for each control ruler a motor-driven displaceable transverse to the table movement direction, the Table reversal effecting limit switch is provided, the actuator cooperates with the control surface, the distance of the limit switch or its actuator from the base the control surface is a measure of the stroke and the position of the limit switch or its actuator relative to the base of the Control surface is transmitted via a resolver, a flexible shaft or the like. On eirie scale in the control panel, "in which also Actuating organs (Push button) are provided for the drive motor of the limit switch. The invention is based on the idea of the longitudinal table movement trigonometrically in a transverse movement with H: \ Xfe of the control line running at an angle to the direction of movement of the table

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where then a relative to the control surface of the control ruler is displaceable End switch Depending on its distance from the base, i.e. that through the lowest point of the control ruler parallel to the direction of movement of the table running line, comes into contact with the control surface more or less early during the movement of the table and is thereby actuated. The respective position of the limit switch or its actuating member can be easily adjusted by a Rotary indicator, a flexible shaft or .. if necessary also by one Baudenzug are transferred to the control panel, so that one can in the control panel arranged scale that reduces the table stroke Scale shows the position of the limit switch or his at any time

Actuator can read. By suitable actuators (Pushbuttons) which are also arranged in the control panel, can you can control the drive motor that causes the limit switch to move transversely to the direction of movement of the table. Since the displacement of the limit switch is displayed on the mentioned scale, an exact setting of the point at which the table is reversed is possible. the full scale corresponds to a whole table stroke. At the same time, however, it also corresponds to the distance from the highest point of the control ruler from its baseline. If you now make this distance dependent on the size of the respective table stroke by different inclinations of the Rulers of the same size, so you can always use the full table stroke Display scale without the need for other gear ratios as is the case with the previously known reduction drives. The new stroke adjustment device is particularly simple in its construction and universal for all different table strokes, both for mechanical ones as well as for hydraulic table drives.

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V / other advantages and details of the invention are based on a The exemplary embodiment shown in the drawing is explained in more detail below.

Show it:

Fig. 1 is a side view of the new Hubeinstellvorrichtung in the direction I of FIG. 2

FIG. 2 shows a section along the line II-II in FIG. 1

Fig. 3 is a plan view of the device according to Fig..1

Fig. 4 is a front view of a control panel

Fig. ¹ j> a longitudinal section through the same along the line VV of Fig.

-Fi:;. 6 shows a cross section along the line VI-VI in FIG. 5

In the drawing, 1 is a straight control curve (control ruler) referred to, which has a control surface 1a. This control surface extends obliquely to the table movement direction B-B. To this end For example, the control ruler 1 can be on the long side of a table or slide of a four-wheel machine, for example a planing machine be arranged that the control surface la extends obliquely from top to bottom. The inclined control surface 1a works with the roller 2 an angle lever ^ together on a slide 4 around the bolt is pivotably mounted. On the second lever arm of the angle lever 3 is a cam 6 is provided which acts on a limit switch 7, the is also arranged on the carriage 4. This limit switch causes the table to be reversed when actuated. By means of the sledge 4 in the embodiment shown to reduce friction by means of '.- / ÄTzkkörern c in the frame 9 transversely to the table movement direction E-S is slidable in direction Λ, - the end

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switch 7 and its actuator namely the angle lever 5 in be shifted in this direction. In order to effect such a displacement, a drive motor 10 is provided, which via a worm gear 11 acts on a spindle 12, which in turn engages in the nut 13 of the slide 4.

Furthermore, the encoder 14 of a resolver is arranged on the spindle 12, which cooperates with a receiver 15, which in turn is arranged in the control panel 16. The receiver 15 acts on a Spindle 17 on which the nut 18 is slidable, but not rotatable stored. Rotation of the nut 18 is made by the guide rail 19 prevented. In the embodiment shown, a lightbulb 20 is arranged on the nut which transmits a light beam a slit diaphragm 21 sends. This light beam is then on the scale 22 visible. Instead of the lightbulb and the bezel, there could also be one be provided close behind or in front of the scale moving pointer in order to exclude parallax errors as far as possible. The length 1 of the scale 22 corresponds to the distance a and the highest point 1b of the control surface from the baseline L, which passes through the lowest point 1c of the Control surface passes through and is in the same direction as the table movement direction B-B. From this it can be seen that the The device according to the invention can always use the full length of the scale, regardless of how large the maximum stroke length of the Machine tool is, one only has to make the inclination of the control surface 1a so that the distance a of the highest point 1b from the base line 1 is always the same size and therefore corresponds to the full length of the scale «The scale 22 is then calibrated in meters and centimeters, where the full Tlsehhufa length in a corresponding number of We subdivided into sections «. 0 0 9815/0122

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Actuators 24, 25 are also provided in the control panel, which, in the exemplary embodiment shown, are designed as pushbuttons for actuating the drive motor 10.

The mode of operation of this new stroke adjustment device is as follows: Before or even while the machine tool is running, one of the pushbuttons 24 or 25 puts the drive motor 10 into operation, as a result of which the slide carrying the limit switch 7 and its actuator 3 4 is shifted in the direction A transversely to the control ruler 1. This shift is indicated by the resolver device 14, 15 on the scale 22 made visible. Since this scale is calibrated to the stroke length, you can read on the scale at which point on the table the table reversal he follows. This table reversal is solved by the fact that when moving forward of the table, the actuator j5 is depressed by the roller 2 running up on the control surface 1a that the Cam 6 actuates the limit switch 7. This limit switch 7 then operates the table reversal via control devices known per se. Since between the position transmitter 3.7 and the setpoint indicator 21 only a few mechanical links, namely the two spindles 8, 17 are hereby switched on thus a reduction gear is dispensed with - the setting errors are kept relatively small, so that a high setting accuracy is achieved. If a larger stroke length is now desired, the push button 25 is pressed, whereby the carriage 4 according to Pig. 1. laughs walking downstairs. Activate the actuator 3 or the limit switch 7 as a result, a greater distance from the base line 1 of the control 'ruler 1, so that the roller 2 comes to rest later or the printing

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link J later depressed v. ^r ird that the limit switch is actuated. In an analogous manner, the adjustment of the slide 4 and the limit switch 7 is made visible on the scale 22. The stroke can be shortened by pressing the push button 24.

However, the device described so far only works for one stroke direction. For this reason, a second control ruler must be provided on the table, which is inclined in the opposite direction. This second control ruler then also interacts with a bot actuating element and limit switch, not shown in the drawing, which are also arranged in an analogous manner on a carriage so that they can be displaced transversely to the direction of movement of the table. The movement of this second slide is then transmitted to the scale 22 in the control panel 16 via a three-point device. For this purpose, a second receiver 15 ^! A spindle 17 * with a corresponding nut 1fc ^! and the rest of the display device is provided. The pushbuttons 24 'and 25' are used to operate the second drive motor.

So that the actuator 5 or the roller 2 is not on the whole The length of the stroke ndt of the dam surface 1a is in contact and came to this contact only shortly before reaching the Uinsteuerpur.ktes, a stop 27 is provided on the slide slide 4 against which the actuating member 2 is held in the starting position by means of the spring 26.

In the embodiment shown, the control ruler 1 se is arranged, that as the table moves the control surface of the

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Ruler increases, so the actuator is pushed down more strongly and at a certain point the limit switch is actuated. If necessary, this arrangement could also be made the other way round, namely that the ruler .not falls off with progressive movement and thus at a limit switch is also actuated at a certain angular position of the actuator.

In the example shown, the limit switch and the Actuating member mounted on a linearly displaceable slide. If necessary, instead of this mounting, it could also be provided by means of parallelogram links or on a rocker arm.

Furthermore, instead of the electrical shaft between the transmitter 14 and the receiver 15, a flexible mechanical shaft, for example, could also be used Shaft be provided if the distance between the control panel and the carriage 4 is not too large. If necessary, the displacement weighting could also be of the carriage 4 can be transferred directly to the scale 22 by a construction train.

In a further development of the subject matter of the invention, it would be conceivable to provide the stroke adjustment device according to the invention also on rotary tables, for which purpose the ruler is merely given a curvature adapted to the rotary table. However, the ruler control surface would be in the Processing run straight again.

If necessary, a straight line can also be used instead of a straight line Scale displaceable pointer of the output of the receiver 15 with a opposite anir. stationary pointer rotating scale connected.

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Claims (2)

. 9 claims 1. Stroke adjustment device for the tables of machine tools, ■ thereby ^ ge "k: e" η η ζ e 1 "chn ~ et r that" at the table at least one straight control cam (control ruler) (1) is arranged, the control surface (1a) of which extends obliquely to the direction of movement of the table (BB), and that a limit switch (7) which can be motorized transversely to the direction of movement of the table and which effects the table reversal is provided for each control ruler, whose actuating element ( 3) cooperates with the control surface (1a), the distance of the limit switch or its actuator from the base (L) of the control surface (1a) is a measure of the stroke and the position _{o of} the limit switch or its actuator relative to the base of the Control surface via a resolver (14,15) a flexible shaft or the like is transferred to a scale (22) in the control panel, in which also actuating elements (24,25) (pushbuttons) for the drive motor (10) of the limit switch (7) are provided. 2. Hubeinstellvorrichtung according to claim 1, characterized in that that two control rulers (1) are arranged on the table, each of which interacts with a limit switch (7), namely a ruler for the Limitation of the forward stroke and one for the reverse stroke. J. H.ibeinstellvorrichtung according to claim 1, characterized in that e t that the ruler (") rises as the table moves. - 1o - 0 0 9 815/0122 - ίο - Hubeinstellvorrichtunj according to claim 1, characterized marked η e t j that the limit switch (7) is on a crosswise direction of movement displaceable S '.: nlitten (4) is arranged. Stroke adjustment device according to claim 4, characterized in that the slide (4) can be moved by means of a spindle (12) on the At the end of this spindle (12) an encoder (14) of a resolver is arranged which is connected to a receiver (15) pre-series in the control panel (16) cooperates, which in turn has a spindle (17) linearly displaceable pointer (20,21) or a rotating scale drives. Stroke adjustment device according to Claim 4, characterized in that it is marked e t that on the slide (4) a, -tine! lever (^) as an actuating member is provided for the limit switch (7), one lever arm of which carries a roller (2) at the end and interacts with the control surface (1a) and the other lever arm of which has a cam (6) for actuating the limit switch. Stroke adjustment device according to claim 6, characterized in that the angle lever (~ j>) is held in its starting position by spring force (26) against a stop (27). 00981 5 / Q122