DE1640998B2 - DEVICE FOR ADJUSTING CYLINDER-SHAPED MASS RESISTANCE BY GRINDING IN A SCREW-SHAPED GROOVE - Google Patents

Description

However, such an arrangement has the disadvantage that a stepless adjustment of the slope

of the helical groove to be ground

35 end of the grinding process is not possible. because the angle of inclination of the one serving as the cam sliding surface Stick firmly to a specific one before starting work

The invention relates to a device inclination angle is fixed and the shape of the groove with continuously changing slope can be changed during the work process, and the shape of the groove with continuously changing incline can be changed in the form of a cam sliding surface is. It is also disadvantageous that after the surface de = Masis Resistance, in which a grinding head carrying a termination of the grinding in of the screw-shaped Schkifscheibe parallel to the groove in the ground resistor, the grinding wheel axis of the ground resistor clamped in a jig is idle back to the starting position must be over a guide rod 45, whereby the performance of the against the force of a spring corresponding to the overall arrangement and also the accuracy of the desired groove pitch with continuously variable groove to be ground is reduced.
Feed rate is shiftable. The purpose of the invention is this

A device is known (to remedy the disadvantages of the USSR author.

ichein 172 644), in which, read grinding of the sharp 5 / The invention is based on the object of grinding in a ben-shaped groove in the surface of the missewider- a device for balancing cylindrical itandes with a ground resistance that is fixed by change gears a given pitch takes place, with the ground screw-shaped groove a stepless adjustment resisted in holders parallel to the axis of the pitch of the helical groove shifts while the grinding wheel is rotating. The grinding 55 of the ^{shift: f} operation to allow, without the Vorlcheibe is fixed to an oscillating grinding head device having to stop, where one A Inge eccentricity and with the aid of a feeding grinding of the helical groove in the ground device to the ground resistance in contact resistance in both directions allowing to be brought. The return of the clamping device should, without the grinding for the ground resistance carrying the grinding wheel, head into the initial position in idle mode, in each case into the initial position, in this case in idle mode. to have to lead back.

With this known device it is not possible.

lich, during de? Working process of the cutting solves that the grinding head at the end of an arm of a dens of the helical groove to set values, double-armed lever whose pivot point is by means of which lie between the permanently adjustable values, 65 of an adjustment handle during the grinding process whereby the achievement of a predetermined accuracy is infinitely variable in the direction of the ends of the lever of the resistance value of the to be machined is slidable, is hinged and the end of the ground resistor is made more difficult. whose arm of the lever with a two

cooperating cams having symmetrical profile halves.

Such an arrangement results in the technical advantage that a stepless adjustment the pitch of the helical groove during the grinding process is made possible without the device to have to stop, it is also advantageous that the carrying the grinding wheel .; Grinding head after grinding the helical groove into the ground resistor for machining the next ground resistance does not have to be moved back to the starting position, but that Cut the helical groove into the next ground resistor in a backward direction of the grinding head carrying the grinding wheel, whereby the performance of the entire arrangement as well as the accuracy of the groove to be ground is improved.

It is advantageous if the grinding head is rigidly arranged on a guide rod with a The end face presses against the spring and is hinged to the lever with another end face.

In the drawing, two exemplary embodiments of the subject matter of the invention are shown. It shows

1 shows a representation of the kinematic motion sequences in a complete device in a schematic representation,

F i g. 2 shows a schematic representation of a grinding head of the device carrying the grinding wheel according to Fig. 1,

3 shows an illustration of the kinematic movement sequences of the device according to another Alis guiding example in which the rocker arm on a sprung support of the grinding head is articulated,

F i g. 4 is a schematic representation of the one shown in FIG. 4 and carrying the grinding wheel Grinding head.

The device for adjusting cylindrical ground resistances by grinding in a helical groove in the ground resistor (Fig. 1) is on two, by uprights from each other attached to separate plates and arranged on the base plate (not shown in the drawing).

A motor 1 is connected by a V-belt drive 2 to a shaft 3 which is connected via a rigid coupling 4 to a shaft 5 which is coupled to shafts 10, 11, 12 and 13 by means of worm gears 6, 7 or 8 and 9.

On the shaft 10 there are cams 14,15,16,17,18 and 19 arranged via contacts 20, 21, 22, 23. 24 and 25, as well as the electronic device 26 connected to this, an automatic control of the effect the entire device.

A cam 27 for controlling a loading device 28 is also seated on the same shaft 10 for the ground resistance to be ground

On the shafts 11 and 13 cams 29 and 30 are arranged, which via corresponding levers 31 and 32, respectively and springs 33 and 34 reciprocate the driving and driven collets 35 and 36, respectively, to provide attachment of the ground resistance »α« to be looped in as well as the ejection of the same after the completion of the To enable helical groove by means of the grinding wheel 37 of the grinding head 38.

The grinding head 38 is on a guide rod 39

rigidly attached and performs a reciprocating Movement with respect to the longitudinal axis of the collets 35 and 36, in which the to be machined Earth resistors »α« are attached one after the other.

To ensure a back and forth movement of the grinding head 38 is on the shaft 12, a cam 40 is arranged, which is driven via a worm gear 8 and via a

ίο double-armed lever 41 with the guide rod 39 is in connection, which is supported with its end face against the spring 42.

The cam 40 has two mirror-symmetrically designed profile halves and ensures in both Directions uniformly extending the same movements of the grinding head 38, wherein for the Movement of the grinding head 38 in one of the directions acts a force that is generated by the cam 40 acts via the double-armed lever 41 on the guide rod 39 against the force of the spring 42. The displacement of the grinding head 38 in the other direction is then carried out by the force of the compressed spring 42. the sequence of movements being controlled by a roller 43 of the double-armed Lever 41, which rolls on the profile of the cam 40, is determined.

The pivot point 44 of the double-armed lever 41 can be changed in its position and moves when turning the adjustment handle 45 by hand over

3 = the bevel gear pair 46 with the aid of a screw 47.

By shifting the fulcrum 44, the groove slope during the machining of the ground resistance can be set continuously between specified fixed incline values.

The fixed values of the slope of the helical groove to be ground in the ground resistor are by gradually changing the speed of the driving collet 35 by means of a gear drive given.

The speed is set via a Coupling 48 and gears 49, 50 and 51 by meshing the gear 52 of a carriage 53 with one of the gears of a block 54.

After displacement, the slide 53 can be fixed by a bolt 55.

The difference between two adjacent slope values is 0.1 mm. The grinding head 38 (FIGS. 1 and 2) has a lever arm 56 which is rigidly attached to the guide rod 39 and a lever arm 57 which is rotatably arranged on this guide rod and which carries the grinding wheel 37.

The lever arms 56 and 57 are connected to one another via a spring 58 and are by a Screw 59 held at a certain distance.

If the grinding wheel diameter is reduced as a result of wear, the screw 59 becomes so far rotated out that the lever arm 57 with the grinding wheel 37 by the spring 58 by the amount of Wear against the ground resistance »α« is provided.

The pressing force of the grinding wheel 37 on the mass resistance "α" to be machined is determined by a Spring 60 is generated and adjusted by means of a nut 61 with a screw 62

The lever arm 56 of the grinding head is provided with a roller 63, when rolling on a Coil 64 the grinding wheel 37 is set to grind the groove at the ground resistor "α".

28? 2

5 6

The grinding wheel 37 is driven by an electromagnet 72, the grinding wheel 37 via a

a motor 65 via a V-belt drive 66 lever 73 at a short distance from the ground

and 67th resisted "a" while the further take-off

In order to grind the grinding wheel 37 into the roller 63 on the corresponding To prevent collet chuck 36 in the event that no 5 profile section of the coil 64 occurs. Is the resistance to ground is clamped, is a nominal screw stand value of the ground counterstop to be ground 68 provided. Status not reached, as a ground resistance to

Stops 69 and 70 ensure that the mass processing arrives whose resistance value the

resistance »« «did not correspond to the initial nominal value after processing, the

Collets 35 and 36 remains. OK grinding wheel 37 only when roller 63 is rolled off

The cams 14, 15, 16, 17, 18, 19, 27, 29 and 30 on the corresponding profile section of the coil 64

are lifted off before the device is put into operation,

set in a program: After finishing the grinding process, the

The entire device works as follows: Cam 19 with the electrical contact 25

The ground resistances »α« are returned to their starting position with the help of the 15 circuit.

Charging device 28 automatically adjusts the tension. The next ground resistance "a" is then

pliers 35 and 36 supplied. The from the levers 31 the collets by the loading device

and 32 controlled collets 35 and 36 tensioning treatment 28 supplied and the grinding head 38 moved

the ground resistance, whereby the lever 32, which in itself under the action of the spring »· 42 in reverse

a screw 71 rests, the starting position of the ao direction by using the grinding wheel 37

Sets the ground resistance. grinding in in the sequence described above

Performs the moment the mass is clamped.

In the current state, the cam 14 closes the electronic device. The described device can connect a radial runout of the mass 35 and 36 that occurs in the device 26 via the contact 20 to the clamping ring loops. Thereupon the cam 15 controls 45 resistance, which arises as a result of the calibration of its over the contact 21 the existence of a shape from the nominal dimensions, does not take into account-earth resistance "a" in the collet chucks 35 and tigen, whereby the width of the ground groove is un- 36. ^T? all this is missing, the device is evenly stopped and the wear resistance of the grinding activity. disk is decreased.

Before clamping the ground resistor 30, it is therefore advisable to start the spinning The cam 40 begins to move the grinding wheel into the collets, instead of the other way around Grinding head 38 with the help of the double-armed lever attach the grinding wheel to the mass to be processed-41 bring up resistance parallel to the axis of the collets 35 and 36. The clamping shifts are pliers with the smallest possible mass.

Furthermore, the roller 63 rolls on the surface 35. In this exemplary embodiment, collets are used

of the coil 64 and copies its profile. Thereby 74 and 75 (Fig. 3) in support arms 76 and 77 and

the rotating grinding wheel 37 is arranged with the one to this in turn in guides 78 and 79,

this time in the collets 35 and 36 which are rigidly connected to the shaft 80 (FIG. 4)

tensioned resistance "a" brought into contact and and by turning this shaft by means of (in the

grinds a screw 40 drawing (not shown) pliers displacement into the ground resistance

shaped groove, the pitch of which is brought up to the grinding wheel by the tooth devices

wheel block 54 is fixed. To be able to withdraw or withdraw from it,

value of the ground resistance to be machined When grinding the groove, the ground resistance becomes

With the specified accuracy can be obtained from a certain force on the grinding wheel

a deviation of the slope from this firmly pressed in 45, which is generated by a spring mechanism 81,

adjustable values can be achieved in that the grinding head 82 consists of a carriage 83,

Displacement speed of the grinding head 38 on balls 84 in the guides 85 and 86

as a result of a change in the length ratio between shifts (Fig. 4), and from an essay 87, the

see the arm 41 'and 41 "when the grinding wheel 37 is moved.

Fulcrum 44 along the axis of the double-armed 50 case, the diameter of the grinding wheel 37 Lever 41 is changed. reduced in size as a result of wear and tear, the attachment 87

During the grinding in of the spn some groove through a screw 88, which is guided in the carriage 83

In the ground resistance »α« the No-.ken 16.17 is, for the ground resistance »α« by the amount of

and 18 successively the contacts 22,23 and 24 shifted a disk wear,

and control via the electronic device 26 a (in 55 Before moving the attachment 87 to

the drawing, not shown) electronic sorting equal.der grinding wheel wear is the screw

device to solve the manufactured mass resistances »α« 89 and again after the shift

depending on the resistance value achieved, to be dumped in, so that the attachment 87 and the carriage 83

appropriate containers distributed: for »rest firmly on top of one another,

Suitable "ground resistances" (i.e. ground resistance, 60 the one articulated with the carriage 83

which are ground in over the entire active length), double-armed lever 41 gives the grinding head 82

and for "reject" mass resistance (i.e. mass under the action of cam 40 a progressive

resistance to the movement occurring over 80 per cent of the active length. The return movement worried

are ground), and for "reworking" the spring 90, which has one end on the support of the

Resistors (i.e. ground resistors mounted on the 65 grinding head 82.

The entire active length are ground in, but the collet 84 is driven by a

does not correspond to the nominal value of the resistor). splined bushing 91 and a cardan shaft 92

Once the resistance has reached its nominal value, one lifts off the gear 49.

2 ?? 2

When a stop disk 93 touches a contact 98 when the ground resistor “a” is clamped, the electronic device 26 is connected to the collets 74 and 75.

The electromagnet 72 is used to lift the ground resistance "a" clamped in the collets 74 and 75 when the nominal resistance value is reached via the lever 94 to a small distance from the grinding wheel.

Even without resistance "a" in the collets

74 and 75 the grinding wheel 37 is prevented from grinding into the collet 75 in that the lever 31 with its roller 95 rests on the cam 29.

The cam 96 closes the electromagnet 72 via the contact 97 to the (not in the drawing shown) electronic circuit of the device. which in turn controls the electromagnet 72.

The mode of operation of this device is analogous to that previously described.

For this purpose 2 sheets of drawings

309553/18

2822

Claims (2)

1 2 It is also disadvantageous that in these known claims: device only a grinding in a helical groove when moving the clamped 1. Device for balancing cylindrical mass resistance in a single direction shaped ground resistances by looping in 5 is possible, whereby the performance of the a helical groove with a stepless arrangement is limited changing slope in the surface of the mass- It is also from the Swiss patent specification Resistance, in which a grinding wheel 417743 is a device for adjusting cylinder bearing Grinding head parallel to the axis of the ground resistors by grinding in a clamping device clamped mass io a helical groove has to move steplessly Resistance via a guide rod against the changing slope in the surface of the mass force a spring corresponding to the desired resistance known, one being a grinding wheel Groove pitch with infinitely variable transferring grinding head thus parallel to the axis Schubgeschwind'gkeit is displaceable, since in a designed as a rotatable clamp through characterized in that the grinding 15 clamping device clamped ground resistance head (38, 82) at the end of an arm (4Γ) one is guided that a carrying the grinding head, in double-armed lever (41) whose fulcrum fixed guides in the direction parallel -! ur axis (44) by means of an adjusting handle (45) during the ground resistance displaceable guide end the grinding process steplessly towards the rod through one of one at its one end the ends of the lever (41) can be displaced, articulated on a slide, as a cam surface is steered and the end of the other arm (41 ") acting straight or curved rod, its of the lever (41) with buckets two mirror-symmetrical angles of inclination to the displacement plane of the slide table Cams (40) having profile halves at least before the start of work is firmly set, interacts, is pushed, with the size of the angle of inclination 2. Device according to claim 1, characterized in 25 at the feed speed and thus the Steik, that the grinding head (38) rigidly determines the degree of supply of the groove to be ground, wherein a guide rod (39) is arranged, which when using a curved shape of the am one end face presses against the spring (42) and the rod articulated with the slide or as a cam with the other end face on the lever (41) surface serving sliding surface a fixed after is hinged. 30 laws, continuously changing slope the groove to be ground can be achieved.