DE2365084A1 - DEVICE FOR CREATING CONCAVERED OR CONVEX ASPHAERICAL SURFACES - Google Patents

Description

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ίΆΤί NTiNVVALIE

D R.-I rs! G. H. FiNCKfH D I P L - i N G. H. BOHR . 3. STAEGER

MÜNC. <-! T_M z ,.

December 23, 1973

Tciejrcirme Clo.ms Munich PosticheCitOnro Munich 27Ö44

Ecycr. Wici .-. Sacr.i MOaioi. Konfo 620-804

VCfP = NO. S7 65

3.P «.n tier Anrv.orr cn-joCc

Description. ^

of the company ESSILOK INTERNATIONAL <& τ4πζ. COHPAGNi: GENERALE D'O? TIQi: £>

Joinville-Le-Ponir / France concerning

"Device for producing concave or convex aspherical surfaces"

Priority: December 29, 1973 - FRANCE

The invention relates to a device for producing concave or convex aspherical surfaces.

Such devices are undoubtedly already known; With them, a raw part is made with the help of a chuck set in rotation, and a cutting tool, which is clamped in a tool holder, is with mechanical means, for example by moving along a

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Sreuernockens, ar. de.c Roht ^ il ent lan ^ .re leads.

Since the concave crier curved esphoric form ir. Primarily based on coal divider. er; .u, ·::; ~ rden ir.uss, which both. ■ ^ rush a casting mold. represent, for example a Fcrrr. for the production of adhesion tscr.a Ln, it is mainly round, since & the form mab.-ne s send except cr -: 2n t borrowed exactly e. in ha. lter, must be & he :. wc-n you want to produce useful parts.

Not only must the form imperfections be accurate, but it jr, the surfaces themselves must be so clean that no Error remains, which would be transferred to the objects produced.

Dia demanded exact- <cit li - f, t under these circumstances Microns, so that products can be v: grounded that connect d only require the usual post-processing. Around Obtaining such an accuracy of the parts of the mold is of course dependent on various mechanical ones Components of the device intended to carry out this work, but in particular the accuracy of the Assembly of the components.

Therefore, the various movements of the acting are allowed Components, i.h. of the tool holder holding the blank. Chuck and cam, only those absolutely necessary have required operating tolerances.

This problem turns out to be even more difficult because of the variety of Mörrlirhen lens profiles and corresponding casting farm parts, which can vary within wide limits.

The ones previously used for the production of such surfaces

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Devices do not work completely satisfactorily, especially with regard to accuracy, easy adjustability of the profile to be produced and cycle times.

This results in a high manufacturing price for a defect-free object, which is due to the number of items to be rejected as defective as well as the number of time-consuming and difficult processing operations.

The invention is based on the * object of a device to develop, in which the disadvantages briefly mentioned above do not occur.

According to the invention a device is to; r. Manufacture of concave or convex acoherical surfaces, only with a south spindle that accommodates an ohmic part and rotates about a first axis, a cutting tool that is displaceable along a second axis and that swivels about a third axis that is perpendicular to the first two axes is, a tax cam ur.d sr it one of your cams mentioned. controlled actuating device which, due to the lock control, is able to move the mentioned cutting tool along its axis of displacement from an advanced cutting position ir. a retracted rest position and vice versa, the spindle rotation axis and the tool displacement axis running through the center of the Asian surface to be formed , characterized by daa d.le. "',.'. teilsrir.'i * ·! ir. cine rs spindle support in a fixed axial!:.; e LriΓ.r ^ .3r is. Cdi cer control units is fixed, da2>: i3 G ' hrti t tv; -ji- z ^ ur -scr. eir.e' _f rjf a rotatable Spar.n- r : f verccr ierLcirer. .rhiitter. held v; irc, and ca & die ■ • etltig ^ r.rsc-ir.x'icr.t, -.- zwi = c ^v . ^ r. cerr.called slide

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and said fixed control cam is.

According to a further feature of the invention is the unmachined part spindle at her; one linden tree with one for recording of the raw part is provided with certain chuck, while it interacts with damping means at its other end, and said chuck has in its interior at least two pairs of contact points for a blank holder and a device for applying the blank holder to these points.

According to a further feature of the invention, the spindle support can be adjusted horizontally and vertically as required, the support mentioned on the upper side being one of two superimposed! Parts assembled base is arranged, the upper part of which carries a device for aligning the spindle support, while the lower part has a projection for receiving the rotatable clamping head s, which has a central pivot which is rigidly connected to a table top on which the called sliding carriage moves.

A further feature of the invention is the spindle support naturally on a support plate of three support points provided on the upper part of the base held that form the corners of a triangle, said upper base part has the torrn of a box weighted down with concrete.

Another feature of the invention is the locker 1-support in the hOrizonta ^ en by three lateral points of contact of which one in the putty of a side

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surface of the support with the interposition of a J

resilient organ is arranged, while the two " M

other points to the ends of the other side face, e- ΪΙ

are engaged, wherein a second point by _e i ersien _NEN ^C

Stand is formed with intermediate pivoting element while the third, designated as a print dot dot da ^ represents actual adjusting means, wherein the Justierunr _ait in the vertical direction by three screws vertical axis is the lower of de _{m sock} i _part ^ "are ^ * and with a support work together and also form the corners of a triangle.

Another feature of the invention _{is the} rigid with a lever that can perform oscillating movements around a tik.lachse, bound by means of a R ^, which acts on the said Elebei, the se under the action of an elastic organ _s eht Γ -hen de ,. Lift! and the side surface of the _locker '' is provided, wherein the pivot point lies in the directional screw and the pressure point and the _Rich , _h be adjacent to each other. ^R ichtschrau-

Wax another Merkel the invention, _{the n} point _{v is} rigidly mix a lever Schwi ■ ^k "

Vertical axis can run, ^ .tΓ ^ ⁸ "^ ^ connected to the ^ η ^^^^^ *« * »on the one hand under the action of an elastic η ias between the lever and the feitenfl * h *" *

is provided ports, wherein the SchwenkpJ ^ * T ^ is the Picht screw un _{d d} T he DruckpurT "^

_{screws lie next to} each other. ^ * ^Richc ~

Another feature d ° r E ^ _n ,

- - - _f - - i -rrrundung include the Bp-

far cen sliding Sch! ^^,

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Ii

see this slide and the fixed control cam are provided, in particular a boom which runs substantially vertically and is pivotably mounted is; Such a boom can with its lower portion with the fixed, advantageously with cooperate variable profile provided cams, and it is designed so that with its help in connection with the crouching concave or convex profiles simply by Changing the position of a micrometer mechanism assigned to it can be produced, soft mechanism with its one end can work with one of two bolts, c ^ e removable on the sliding one carrying the tool holder Carriages are attached and offset in height on two sides with respect to the pivot axis of the boom and are also spaced from one another in the longitudinal direction.

i''ach a further feature of the boom working with the said cam via a selectively adjustable sensor together such aa, it is according to the position of this sensor, rn "^ 'I to alter the required profile, namely

on both sides from a common starting point, so that the cam does not need to be assessed as dismantled.

After another, more important one. Feature of the invention is

! the cam is fixed with a variable curve line

^: And wira automatically when its placement on the machine

brought into position, so that after suitable adjustment, parts with convex or concave aspherical ¹ 'will look like surfaces.

^; <can be asked.

The setting of the desired profile of the cam is advantageously according to a further important feature, auEöe ^ half of the device, by means of an arrangement vorgenorrxieri, which swivel around an axis on a base

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has bar frame, the egg. ^ on one side with the! lure cooperating sensor and on the other hand has a pointer, which is provided in front of a graduation Sector of the document plays.

The machining processes can be carried out with such a device in erheoliehen K.iße simplify; you get therefore compared to the earlier manufacturing methods Shortened cycle times, preserve the manufacturing accuracy is extraordinarily large.

Further features and advantages of the invention result otherwise from the following description of an exemplary embodiment the invention with reference to the drawings, the following-; represent:

Fig. 1 is a partial perspective view of the invention Contraption;

Fig. 2 is a side view;

Fig. 3 is an associated plan view;

4 shows the view of a support for the base relative to the machine frame;

5 shows the group of unmachined parts in a plan view and in a larger view Scale, with the associated actuating and damping. education facilities;

6 shows a section along the line VI-VI in FIG. 4;

FIG. 7 shows a partial section through an embodiment modified in relation to the aforementioned damping device; FIG.

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U?

Fig. 8 is a side view of the tool holder in greater detail Scale, with the tool holder clamping head is indicated only in phantom with dash-dotted lines;

9 shows a corresponding front view with a viewing direction according to the arrow IX in Fig. 8;

10 is a top view looking in the direction of the arrow X in Fig. 8;

Fig.11 is a perspective view of the slide of the VJerkstückhalterers;

Figure 12 is a plan view of a variable profile cam and on the facility for setting the profile,

FIG. 13 shows a section along the line XIII-XIII in FIG. 12;

Fig.14 is a view of an embodiment of the manufactured Workpieces (if some parts are omitted).

In the embodiment drawn and to be described, which is only to be understood as an example, there is the device according to the invention for the production of aspherical Areas essentially from a stable machine frame 10 with a base 11, on the one hand a Spindle support aligned horizontally in the direction of an X-X axis 12 and on the other hand a four-tool holder clamping head 14 carries, which by means of a central pivot pin 15 is arranged pivotable about an axis Y-Y.

The named axes X-X and Y-Y are perpendicular to one another and intersect at a point, and the

M 57 65

The actual tool will be struggled before. a xesr-standing Cam 16 controlled.

All these organs, which are only mentioned in general, are now in the individually explained.

The machine frame 10 consists of welded rod profiles sit reinforcements not shown in the drawing to increase strength. The frame is κατ four strong feet on ceir.Eoc & r ·.

The machine frame 10 is completely closed; he Serves as a base for the base 11 and for receiving Attachment parts such as hydraulic pumps, fluid and lubricant containers, Compressed air lines and lines for generating oil mist, etc.

The various attachment parts mentioned are summarized in FIG end labeled 19.

The base 11 is supported on the machine frame 10 in three support points (FIG. 3), each of which is summarized with 20 or 21 bzu. 2 2 are designated and denote the corners of a triangle.

From Fig. 4 it can be seen that the upper side of the machine frame 10 has a covering 23 made of rubber or another suitable material at the location of each of the mentioned support points, on which a precisely machined washer 24 lies, the free upper side of which with the end a threaded spindle 25 cooperates, which screws into a support 26 which is rigidly attached to the central part.

The threaded spindle 25 has a actuating head 27

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Radial bores 28, while a lock nut 29 for blocking the spindle 2 5 is used.

This? Arrangement allows adjustment of the position of the Base 11, which will then be described.

The base Ii is a StaalbK-ch Konstrukticn, which has a first untaron "'ail HA: on which a second upper corner part 113 is arranged, which serves to receive the spindle support Jl and the attenuation device 13. The base part 11 /. Shows (cf. 3) an approach H ¹ A, which is used to hold the chuck for the tool holder 14 and the pivot pin 15.

The base 11 rests naturally on the machine frame 10, and dampens the vibrations that occur during machining the blank can occur, consists of a concrete fill 30 in a compartment of the base structure 11; in derr.Sockel 11 openings 31 are of course provided as a passage for the actuators, which are described below should be. On the upper side, the base part 113 carries a precisely machined support plate 32.

5 to 8 shall now be considered in greater detail _} demonstrate the details of the spindle support 12 and of its fastening.

Ler trwähntp spindle support (cf. also Fig. 11) essentially has two half-boxes 40 and 4 1, in each of which a «? nclbkreisaxialfräsung 42, 4 3 is provided; the unrerfi H ^ ihkas + en ^ O rests on the precisely machined support plate 3 2 'and is held by devices which will be described in detail below.

The half-bores 4 2, 4 3 cores a preferably hydro-

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4 take dynamically acting spindle holder 5 in which läfit shift in the axial direction, a spindle 4, 6, whose one _S receives a clamping head generally designated 47 as a front end designated end 4GA, while the other, referred to as a rear end end 4GB with a drive pulley 50 is provided.

The drive pulley mentioned is provided with a conventional transmission 51 driven by an electric motor fastened, for example, to the underside of the machine frame 10 52 is running.

The attached in the front part of the spindle 46 clamping head 47 contains a device for. Holding the blank to be machined, indicated in aen Fig. 2 and 3 with E.

As can be seen in particular dan Fig. 5 and 6, the clamping head 47 has in its interior two pairs of support points 55, 55 and 57, 53, which are offset from one another in the longitudinal direction, and a pressure screw 59 causing the radial alignment, which the Approach of the blank E is to press against the mentioned support points.

The support points of each support point pair ensure a radial alignment CFig * 5); they are expediently offset from one another in I2ö, while the radial pressure screw SS lies in the cement of the remaining peripheral part.

Ajf this V ^ eiso creates a 5-point centering, which is particularly »Irkunp.ivoli and ger * au works»

L'er spindle sup; location 12 rests naturally on the

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ff precisely machined support plate 32, and the lower base

j | Part 40 works with Eirctellnittcln, which in

ff longitudinal direction distributed sine and the - like in particular

ff can be seen in Fig. 5 - a first fixed support. 60

ϊ || have, which in the middle of a side surface of the locker 1-

Il supports is arranged, as well as a second support 51, which

I on the other side and shifted to a corner

I is categorized.
t

«In its lower section, which corresponds to the lower part 40 of the

I overlaid on the spindle supports, the support 60 shows a

I recess for a compression spring, the free end of which is

1 sweep the mentioned part 40 logs.

I On the opposite side (Fig. 11), i.e. on the

I side with the support 61, the lower locker has! Support-

I part 40 has two recesses 70 and 71; the recess

* ^j receives a pin 72, which has a practically fialb-cylinder

* Table executed section 7 3 shows, while never other _t * recess 71 for receiving a precisely machined part

* Support part 74 is used.

t. On the support 51 is a? ilin recess 75 provided in

* the at least part of the semi-cylindrical section

; 7 3 protrudes.

t ^J In this way there are two side contact points for

t the spindle support 12 is formed, while a third 3e-

L. The center of gravity is established on the same side as the support 61 by a sector 80 to which a lever ei running practically parallel to the side of the support 12 is assigned; the lever 31 kar.n in a horizontal

ί ther.c swing around an axis 8 2, which is beyond the

* called Sekters BO is, under the effect of an activity »

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screw 8 3 provided at the other end of the lever 81 and adjacent to the support 16; the screw 8 3 leaves sieve screw into a thread in a fixed part 85 and "is supported by anv-.demi lever 81, while one between the lower part 4.0 of the support 12 and the lever mentioned The spring 87 is applied to return the lever outwards in the direction of the arrow F, i.e. in contact with the end «Seeks to bring 1 screw 83.

In this way, the orientation of the axis X-X; and thus regulate the spindle support and the counterpart, whereby this regulation is extraordinary due to the translation brought about by the lever and sector 80, lent can be sensitive.

The spindle .46 can move freely in the spindle holder 45, and their axial position is determined by means that micro-regulate the feed rate of the blank let achieve which regulation a return of the

ΐ Unmachined part is permitted if the contact pressure of the tool has a

exceeds the specified threshold.

To disguise bumps when returning, there is also a

{Damping device is provided, which on the basis of FIG

\ should be described.

Yiis from this figure can be seen on the back! At the end of the spindle 4G a notch 90 is attached which can accommodate a ball <U, while the front part 62 of the damping device 13 can also work with the ball.

Un to secure the return of the spindle 46 i _n the direction of the front stop surface 92, magnets 43 are at the

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opposite surfaces of these parts attached (Fig. 5).

A main part 93 of the damping device is in the extension of the spindle 4G and can move in the direction of arrow F ₂ on detf precisely machined plate 32 by means of a known and therefore not shown sliding device.

The front part 92 can be in the longitudinal direction by means of a Adjust the disc 95 provided with graduations and the front part acts directly on the end of the spindle <* 6 a. In this way, a first axial adjustment is achieved the spindle.

Γτ, main part 93 of the Där.pfungsänrichtung is between two Supports 100 and 101 arranged on the support plate 32 are attached; at the rear of the main body Laterally protruding approaches 103 and 104.

Zi regard of the support 100 and the mentioned lateral projection 103 is arranged on the one hand a total of 105 designated damping cylinder whose jacket is firmly connected, for example, to the support 100, de ^ ¹ the piston head against it with the shoulder 103; parallel to this, a spring 107 is fastened with one end each to the support 100 and the extension 103. On the other hand, a microineter device 110 with one end 111 is provided on the support 101, which works together with a ball 112 which is supported on a support plate lld attached to the extension 104, and an actuating end 114 the _like

By operating the Kikrcmeterervor-direction 110 one can

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i'.aur-tteil eier üäir.pfunnsvcrric '-. do, - in the direction of ess arrow F _? relocate, v: arr.it a. .

Thanks to this service facility, the main text is 93, if the one exerted by the tool on the kitchen part L " Pressure a certain threshold Ie η we rt overridden by cer ball Sl pushed back, i.e. in Fir, - S: to the right, v; c when a tension is exerted on the spring 107. If the The pressure exerted on the part by the tool again Has its normal CrIS3e, the main part S3 almost reverts back to its original position, subdued in its movement through the cylinder 13.

In the embodiment shown in FIG. 7, as Damping device provided a hollow body 120, in the; a piston 121 divides two chimneys 122, 123.

In the cabbage body 120, a Ge v / in de penetrates Piston rod 124 the canteen 122 and carries a ring 128, which can be moved axially and against rotation one only 129 and one screw 130 running in it is secured. A r.uge! Stop 131 is located between one side of a graduated disk 132 connected to said lead screw 124, and the associated side of the spindle 46.

The other side of the piston 121 acts in the chamber a regulating spring 135, which is externally controlled by a screw

The main part is provided with a lateral extension 138, the one via a standard valve with a non-sealing ball

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and a calibrated nozzle 140 connected to the chamber 123 in which the piston 121 is displaced.

In the same way as in the above-described embodiment form, the rotation of the disk 132 allows a longitudinal adjustment, while the spindle is reversing too quickly 46 upon withdrawal by the ball valve 139 and the calibrated nozzle 140 is delayed.

Now the details of the tool holder clamping head5

14 are described in particular with reference to "FIGS. 8 to 1 ⁿ .

The tool holder clamping head 14 (see in particular Fig. 1 and 2) is attached to the central pivot 15, which is fitted with a roller bearing, not shown, on the neck 11Ά is supported. The twisting of this central D ^ ehzapfens 15 takes place by means of a motor 151 and a Gear ratio 15 2, 15 3, located under the machine frame 10 are located and the one with the central pivot pin

15 drive keyed shaft 154.

The motor 151 can be reversed and its speed can be changed. The pivot 15 carries a table top 160, on which a slide 161 can be displaced by means of a sliding device known per se, which is connected to a toothed Coupling part 162 is provided, which can receive a corresponding member 16 3 of a tool holder 164.

On the front of the table top 160 (see in particular <ÜS F "

Pick up axes 17 2 and 17 3, the free ends of which engage in tabs 17 5 and 17 6, which form a positive fit with an arm 177 are connected that extends vertically.

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The boom can thus pivot about the horizontal axes Execute 17 2, 17 3.

The mentioned pivoting movements are controlled by the curl 15, to be described in detail below, by means of a sensor 181 which is arranged on the lower part of the boom 177; If the sensor 181 remains in contact with the outside 222 de = cam 16, a spring 190 is provided, one end of which is fixed to the bracket 177 and the other end to a fixed point 191 of the table top 160.

The transmission of motion by the stationary Cams are to be exerted on the boom 17 7 and from there on the slide 161, is carried out by a micrometer mechanism 200 (see in particular FIG. 10), one end 210 of which is connected to one of two rod-shaped elements 202, 203 cooperates attached to the carriage and are offset in the longitudinal direction along the pivot axis of the boom 17; Incidentally, these pens are also in the Height offset from one another (cf., in particular Fig. 8).

The free ends of the rods each have a tip 204 attached eccentrically to the axis of the respective rod, and in this way a point contact takes place between the end of the mechanism 200 and a corresponding end of the rods 202 and 203 are also adjustable in the longitudinal direction; This adjustment is made by rotating the rods 202, 203, which is a displacement of the Berühruno'S'-mnk'tes 2Q ^ ¹ * ^σΆ enüber d ^Gr> mechanism 200 is connected. In this way you can bring about a very precise setting of the transmission ratio.

The mechanism 200 can therefore be designed so that they

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cooperates with either rod 202 or rod 203; for this purpose the boom 177 is with very precisely arranged bores 105 and 206 provided, which can be used alternately as needed while the screws 207, 208 are used to block the mechanism.

Thus, the bluntly abut η 204 at the end 201 of the mechanism 200, a spring 18 3 is provided, which is fastened with its one ^r nue to the table plate 160 and with the other end on the slide 161st

Thanks to this arrangement, depending on the setting of the mechanism 200, all required, concave or convex molded aspherical shapes can be produced.

Ce, r sensor 181 (FIG. 5) is part of a plate 210 which has a horizontally extending opening 211, while a screw 212 guided through the opening is fastened to the bracket 177 and the possible horizontal displacements of the plate 210 and the one located on it Sensor allows.

The task of such an arrangement is above all the production of different types of profiles, starting from one common middle Ausganpslage.

12 and 13, in particular, ground ν with that there shown, generally designated 16 cams described with a variable profile.

The aforementioned cam has a plate 216, which is generally Has a circular arc shape; this board has a notch at 217 to accommodate the actual cam

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in

befeh'gt ^

partly on, which consists of a band-shaped, resilient element 218 made of steel or some other elastic material - the notch creates a bar 219 that accommodates a large number of adjusting means, which are designed as screws 220 in the example shown. One end of these screws should work with a rear side 221 of the resilient strip ζusawser., While its front side ß% Z [ interacts with the feeler lßl of the boom 17 7.

Advantageously, it is on the back of the spring strip a layer ^^ S ^ of a metal, an elastic one or plastic material or other suitable material appropriate; the layer can be continuous or applied in sections * such Shift Should in particular compensate for the inequalities, on the one hand by the tension of the belt, which is necessary for sufficient rigidity of the cam is, and on the other hand by the distance between the Bolts 220 are caused.

In order to be able to adjust the profile of such a squatting position, a table 225 is provided on which a frame 227 can be pivoted about an axis 226 .anF, -crdnet; the Kahir.en carries a sensor 223, which actuates a length device 229 and cooperates with the front 222 of the spring strip 213.

In addition, stops 2'-tQ are attached to the table 225, which allow a definition of the lockenhal-fcer; the mutual position of these stops corresponds to the length of the corresponding stops of the Kaschinenrahjrens, as will be shown below.

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The table 225 also has a division 232, Above which a pointer 233, which is attached to the axis 226, plays.

Knowing the distance of the fulcrum from the end of the probe 228 at a given angle, one can determine the profile of the cam by turning the adjustment screws 220.

The kit of the arrangement described can thus run the cam profile auscrordent] I adjust precisely and quickly, 4Yes yes these settings occurred outside the machine without the need for lengthy and difficult assembly and disassembly work.

When the crouch is set according to the selected profile, it is placed on the upper part of the machine frame, which for this purpose (see in particular FIG. 3) is equipped with a centering system comprising four points 25 0, 251, 25 2, 25 3 is; the centering system is adapted to the abovementioned stops 2 ^ 0 in such a way that an alignment automatically oer symmetry was the axis of rotation YY of the central pivot and the axis of rotation 7.-7. corresponds to the spindle.

In the present device, the fixed one controls lock 15 directly the cutting tool and not eir. Grinding tool of a lapping establishment.

You can advantageously finish the raw part directly with a diamond washer and achieve a much finer and more uniform smooth finish. In addition, ornamental, easy Kcnkavf! Scher, work out, even if & he little Krüirzmngsradier. nateri.

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Also has to have the cam described variable profile the not numerous to be underestimated advantage Einstellmöglxchkeiten _4, for example, to achieve curvatures of Fertizteils that can be caused by certain production steps.

The cam variable profile can be used _i example of optical machines for the production of aspheric surfaces, and also to "any other mechanical devices and for other purposes on all copying machines.

The operation of the device described for the production of, for example, a mold for the casting of contact lenses can be defined as follows:

a) r ..

b) after the device has been geometrically prepared in this way, the fixed crouching 16 is adjusted according to the profile required for the workpiece to be machined with the aid of the adjusting device for the crouching;

C) the fixed cam 16 is placed on the device and with a few tries it then becomes the central one Radius of curvature with the help of the ones attached to the boom 177 MikroHietermechanik 200 discontinued With the help of a suitable grinding wheel, the raw part is made shaped;

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e) the tool holder is removed and against a tool holder exchanged with a post-processing tool;

f) various work steps are carried out by the workpiece holder with the help of the micrometer mechanism 110, which is associated with the damping block, advances until a two-part mold M-M. (Fig. 14) has, in which a mold cavity is recessed, which is completely free from defects and a concave or a convex Has aspherical surface.

Claims.

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Claims (1)

M 976 & J Pa-cent claim before Device for producing concave or convex aspherical ones Areas, with a mn receiving a raw part a first axis rotatable spindle, a cutting tool arranged displaceably along a second axis, which can be pivoted about a third axis perpendicular to the first two axes mentioned, a control cam and with one of said lock controlled actuating device, which due to the cam control said cutting tool along its Shift axis from a forward to a back to oraiier. 2 position and vice versa capable, wherein the one position is a cutting position and the other is a rest position, furthermore the lockers The axis of rotation and the axis of tool displacement run through the center of the aspherical surface to be formed, characterized in that the unmachined part spindle (46) in a spindle support (12) can be brought into a fixed axial position is that the control cam il6) is fixed that the cutting tool from a rotatable clamping head sliding carriage (ΐεΐ) is held and that the actuating device is arranged between said slide and said control cam. 2. Device for producing aspherical surfaces, according to claim 1, characterized in that the raw part spindle - 23 -. A09832 / 0302 H 97 5 5 Y (46) at one end (4GA) with one for the recording of the Pohteils (E) certain lining (47) is provided, while at its other end (463) with Damping means (13) cooperates, and that said Lining in pei ^ Hm interior at least two pairs of points of contact (55, 56, 57, 5S) for a blank holder and a device (59) for placing the blank holder on it Point *. 3. Device for producing aspherical surfaces, according to claims 1 and 2, characterized in that the spindle support (12) is horizontally and vertically adjustable as required, said support on the top of one of two «superimposed parts (11A, HB) composite base (11) is arranged, the upper. Part (11B) carries a device for aligning the spindle support (12), while the lower part (HA) has a projection (11 ¹ A) for receiving the rotatable clamping head, which has a central pivot pin (15) which is connected to a table top (160) Jtarr on which said sliding carriage (161) moves. 4. Apparatus for producing aspherical t laughs, according to one of the preceding /! Claims, characterized thereby t _; that the spindle support (1?) naturally on a support plate (32) provided on the upper part (HB) of the sock la (11) and has three support points : (60, 61, 60) holding the corners of a triangle j picture, whereby the inclined, .th upper base part (HB) the j - 24 - A09832 / 0302 Has the shape of a box weighted down with concrete (30). 5. Apparatus for producing aspherical surfaces, according to claim 3, characterized in that the spindle support (12) is defined in the horizontal by three lateral contact points, one of which (60) in the middle of a side surface of the support below
Interposition of a resilient member (64) is arranged, while the two other points (61, 80) are moved to the ends of the other side surface, a second point (61) being formed by a first stand with an interposed pivot member, while the third, Point (61) referred to as the pressure point represents the actual adjustment means, with adjustment in the vertical direction using three screws (25) takes place with a vertical axis, which are provided on the lower base part (11A) and with a support (26) work together and also the corners of a triangle form. / καώ / frfpnfch 6. Device for producing aspherical surfaces, characterized by VÖädurch, <5aS> the pressure point is rigidly connected to a lever (81), which can perform oscillating movements around a vertical axis, by means of an alignment screw (3 3), which is connected to the aforementioned. The lever (81) acts, which in turn is under the action of an elastic member (67) which is provided between the lever (81) and the side surface of the spindle surport (12)
where the pivot point is near the directional screw
lies and tev pressure point and dit; Spruce screw each other - 21 - A09832 / 0302 H 976S / lie adjacent. 7. Device for producing aspherical surfaces, according to one of the preceding claims, characterized in that the spindle associated with the unmachined part (4-6) Damping device (13) has a central part (93) with a front surface that can be displaced in the longitudinal direction (92) which cooperate with the raw part spindle (45) by means of a ball stop able and that the smock part on both sides its longitudinal axis with Linstellmittel for a given axial location as well as with gowns to keep him in a particular to hold a fixed position, is provided, this means consisting of a tension spring (107), which on the one hand on a fixed stand (100) and on the other hand to a lateral extension (103) of the main part (93) is fixed, exist, while one lying parallel to the spring Damping cylinder takes effect when during the machining process an additional train occurs. Apparatus for producing aspherical surfaces according to one of claims 1 or 7, characterized in that a modified danishing device has a stationary, central hollow body (120) in which the said damping and axial positioning means are arranged. $. Device for producing aspherical surfaces, according to One of claims 7 or S, characterized in that the central hollow body (120) has two inner channels _ 26 - 409832 / Ö302 M 9765 (122, j-23) on both sides of a piston (121) and of which a first chamber (122) has a threaded spindle connected to the piston (121) • Contains (124) as a piston rod, the part of which protrudes from the hollow body (120) with a scale division provided disc (132) and which is in a rotationally fixed, but axially displaceable: hieblich arranged ring (128) can be twisted, while in the second chamber (12 3) the free end of the piston (121) is under the action an externally adjustable spring (135) is, and that a chamber connected to said opens the second chamber through a valve opening (140) with a calibrated nozzle » 10, device for producing aspherical surfaces, according to claim 1, characterized in that the tool holder is arranged on the movable carriage (161), which in turn is slidable on a table top (160) which in turn constitutes the collar of a central pivot, said Carriage (161) has point-like contact with a boom (177) over its front side, which is practically vertical and is placed in such a way that he is under the influence of the fixed cam (16) arranged in the lower part of the device can be deflected. 11. Device for producing asphaltic surfaces, according to Claim 10, characterized in that the punctiform Contact between the boom (177) and the tool - 27 - 409832/0302 M 9 76 5 Ο holder table top (160) by one of the boom held micrometer mechanism (manufactured in 2007, which brings a through axial displacement in contact with a Tip (204) has a movable end (201), which tip is the end of one of the table top associated Llements represents. 12. Device for producing aspherical surfaces according to one of claims 10 or 11, characterized in that that the table top (160) has two points (204) J see elements (202, 203), which in the longitudinal direction direction of the pivot axis of the boom (177) and fromL, erdem are offset from one another in the vertical direction, while j the micrometer mechanism (200) from the boom (177) ■ is removable. 13. Apparatus for producing aspherical surfaces, according to claim 12, characterized in that each with a tip provided element (202, 203) is rod-shaped, can rotate around its acnse and in an eccentric to this Axis lying tip (204) runs out. J4. An apparatus for producing aspheric surfaces according to any one of the preceding claims, characterized in that. & Boom (177) having at its lower end a sensor (181) capable of cooperating of the cam (16) having a front (222) and is attached to the boom (17 7) so that it can be moved » - 28 - 40983 2/0302 15. Device for producing aspherical surfaces, according to claim 14, characterized in that about 5 of the ruhler (181) can be displaced parallel to the cams in a long seat (211) as required, which means that changes in the machining profile can be brought about on both sides of a common starting position. 15. Performance to the manufacturer, asphuric surfaces, after Claim 2, characterized in that the points of contact are formed by two pairs of supports which are offset from one another in the longitudinal direction and in a The bore protrudes, the said supports being formed by the tips of ribs, the surface lines follow, are oriented in the radial direction, and preferably include an angle of 120, while the organ that places the said blank holder against the said points is formed by a pressure screw which is arranged in the opposite direction between the pairs of supports. 17. Device for producing aspherical surfaces, according to Claim 1, characterized in that the control cam (16) consists of a flexible strip or band (218) consists, which is attached with its ends to an exchangeable circuit board (216) and on its back the effect of a large number of adjusting means (220) from-σ6> ςρ> -} - 7+ is the "arsllsl to dsr level of platinum and as a result, are adjustable in a direction perpendicular to the plane of the belt (213). For: ESSILOR INTERNATIONAL S.A. COMPAGNIE GENERALE D OPTlQUE 'PATiWTAMWALTE - 29 - 0 ".- WIS-H-FEMCKE. DlPL-ING. Η.» 0Ηί ΜΗΛΙΝΟ, ί. STASGiK 409832/0302