DE2905573A1 - DEVICE FOR DRESSING A SANDING BODY, IN PARTICULAR FORMING SANDING BODY - Google Patents

Description

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The field of application of the invention relates to a device ii e £ chleif _t in particular voe shape grinding body * j & ^x ne4i AU for "

There are devices known in which by means of a ratchet-ratchet wheel The diamond-tipped rollers are fed against the grinding wheel via a threaded spindle.

Some of these devices have a hydraulic quick adjustment for approaching and lifting the diamond-tipped balls.

These devices have the disadvantage that in most cases the speed of the infeed step is too great and thus the Diamond-tipped role experiences a large load that is detrimental to the life of the diamond-tipped role.

Furthermore, devices of the known type have the disadvantage that hydraulic quick adjustment of this type an additional Require sleds.

Furthermore, devices are known in which the control of the feed movement and the dressing movement of a rotating grinding wheel is operatively connected to an electric motor and inserted a torque measuring instrument between the electric motor and the dressing tool is. The electric motor is caused by additional impulses to move the grinding wheel in the direction of a very specific amount of dressing to move on the dressing tool. It is also possible, instead of an electric motor, to use a hydraulic device for vertical Adjustment of the grinding wheel to use.

In this case it is disadvantageous that the grinding wheel must be moved in the direction of the dressing device, and consequently for universal thread grinding machines is not applicable. The dressing process itself is only for simple grinding tools, but not for ? «F-shaped grinding media possible.

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ORIGINAL INSPECTED

Another disadvantage is that when the grinding wheel comes into contact with the diamond-tipped roller, an infeed amount controlled via torque measurement is realized, which leads to a high load on the diamond-tipped roller and thus a significantly shorter service life of this roller is to be expected.

The invention serves to provide a device for dressing a Use sole body, in particular a shaped grinding body, which, with simple means, enables an infeed movement of a smaller size, in order to ensure, above all, that the to realize diamond-tipped profile roll.

The deficiencies described in the characteristics of the known technical solution can be traced back to the following causes:

1. Own equipment that has diamond-tipped rollers partly a hydraulic quick adjustment for approaching and lifting of diamond-tipped rollers.

2. The speed of the infeed slide is too high for precision machining of form grinding bodies, so that there is a risk high wear of the diamond-tipped rollers.

3. In order to realize the movement according to point 1, the previously described facilities via an additional slide.

In order to eliminate these deficiencies, the invention is based on the object of using a device for dressing a grinding wheel, in particular a shaped grinding wheel, which includes simple means implemented a gentle feed speed of small size for a diamond-tipped roller, as well as the approach and lifting of the diamond-tipped roller without additional Carriage executes.

According to the invention this is achieved in that the device for Dressing a grinding body has a first hydraulic cylinder which, when pressurized by means of pressurized oil, releases a brake cone, then releases the path for the pressurized oil, which one applied to the second hydraulic cylinder.

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The second hydraulic cylinder, in turn, performs a shift a shift rod with a pawl rotatably arranged on it, at the same time a ratchet wheel arranged on a spindle is driven, which sets a visual drive in motion and thus a slide infeed can be carried out

The second hydraulic cylinder itself is after the slide has been infeed axially back into an output position © by means of a compression spring to lead.

The ratchet wheel with pawl, which is arranged on the Spindsl and firmly verbura = dene, simultaneously sets a further screw wheel in rotating motion, this screw wheel having a brake cone arranged at its front end. is lifted in the axial direction by d® & the first hydraulic cylinder and, when the pressure is interrupted, is braked by means of an axially acting compression spring without changing the direction of rotation »

According to the invention, the helical gear is firmly connected to the ratchet wheel with another helical gear engaged and axially displaceable arranged on a further rod, which in turn is in operative connection with the first hydraulic cylinder «

According to the invention, the device also has © ins nut _e which is connected to a thrust piston drive via a lever, whereby on the one hand the nut is held by the arrangement of the thrust piston drive and only a spindle with a pawl does a © delivery movement of the slide, on the other hand there is a threat from the nut the thrust piston drive a further® extra bed adjustment. is realized with a low delivery speed of the slide, the spindle being held by the brake cone itself _a

The invention is to be explained in more detail using an exemplary embodiment will, show it

1 shows a view of the dressing device, FIG. 2 shows a section I - I according to FIG. 1, FIG. 3 shows a section II - II according to FIG.

In a box-shaped base body 13 according to Fig. 1, the essentials are Components of the facility shown «The facility for Dressing a grinding wheel has a hydraulic cylinder 1,

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■ unoriginal INSPECTED

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which when pressurized oil via a line causes a brake cone 14- ventilates, then releases the path for the pressure oil via line 17, which acts on a further hydraulic cylinder 2.

The hydraulic cylinder 2 in turn causes a displacement of a Shift rod 18 with a pawl 12 rotatably arranged on it about an axis, with a pawl 12 arranged on a spindle 19 at the same time Ratchet 4- is driven. Ratchet 4- sets a spindle 19 in Movement and thus carries out a slide infeed. The hydraulic cylinder 2 can be axially returned to a starting position by means of a compression spring 21 after the carriage has been infeed.

The arranged on the spindle 19 ratchet wheel 4- with pawl 12 sets Via a helical gear 5 firmly connected to it, a helical gear 6 in rotating motion, this helical gear 6 at its front The end of the brake cone 14- carries. This brake cone 14 · is via the Hydraulic cylinder 1 is lifted in the axial direction, and after the pressurization of the hydraulic cylinder 1 has ended, by means of an axially acting Compression spring 15, without changing the direction of rotation, helical gear 6 with brake cone 14- is braked.

The helical gear 5 firmly connected to the ratchet wheel 4 is connected to the Helical gear 6 in operative connection, with helical gear 6 with brake cone 14 guided on a rod 7 and connected to hydraulic cylinder 1 is.

The device also has a nut 9 according to FIG. 2, which Connected via a lever 10 to a thrust piston drive 11 according to FIG. 3 is, on the one hand the nut 9 held by the arrangement of the thrust piston drive 11 and only a spindle 19 with a pawl 12 Infeed movement of a slide takes place, on the other hand a rotation of the nut 9 via the thrust piston drive 11 results in a further infeed movement is realized with a low infeed speed of the carriage, the spindle 19 itself being held by means of a helical gear 6 with a grems cone 14 is.

909850/0543

-5-ORIGINAL INSPECTED

When pressurized oil is applied to line 16, hydraulic cylinders are used 1 and rod 7 of the brake cone 14- released. After that there are hydraulic cylinders 1, the line 17 is free and the rod 18 is displaced via the hydraulic cylinder 2. The pawl 12 the ratchet wheel 4 and with it the spindle 19 rotated, the nut 9 is held by the piston drive 11. An infeed step has thus taken place, the completion of which is reported by the limit switch 20 will.

This signal is used to reverse the hydraulic system, which causes the Line 16 and 17 are depressurized. The axially acting compression spring 15 is connected via the brake cone 14 of the helical gear 6 with the helical gear 5 the braking of the spindle 19. Simultaneously the rod 18 with the pawl 12 is returned to the starting position by the compression spring 21.

About the thrust piston drive 11 and the articulated lever 10 takes place Rotation of the nut 9 by a constant amount. Through the one-way flow control valve 22 it is possible to have a very slow movement of the thrust piston drive 11 and thus a very slow advance movement can be achieved with a constant stroke.

After the limit switch 23 has been actuated, the hydraulics are reversed and through the action of the one-way flow control valve 22, a rapid resetting of the thrust piston drive 11, and thus a rapid one Resetting the nut 9 in the starting position, with a rapid lifting movement of the dressing tool is guaranteed.

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Claims (1)

1905573 Claims ! Device for dressing a grinding wheel, in particular a shaped grinding wheel, with a diamond-tipped roller driven by a motor, essentially consisting of a slide driven by a screw drive, the nut of which is driven on the one hand by a hydraulic piston drive, while the spindle is braked by a braking device and on the other hand the spindle through a. The ratchet-ratchet gear is driven, characterized in that a hydraulic cylinder (1), when pressure is applied, releases a brake cone (14) and then releases the path for the pressure oil, which acts on a hydraulic cylinder (2), which in turn moves a rod (18). with a ratchet (12) rotatably arranged on it and at the same time a ratchet wheel (4) with helical wheel (5) arranged on a spindle (19) so that a slide is delivered and the hydraulic cylinder (1} 2.) after the slide has been delivered by means of a compression spring (15 ^ 21) can be moved back axially into the starting ™ position _o 2 "Device for dressing a grinding wheel, according to claim 1, characterized in that the helical wheel (6) is driven via the helical wheel (5), which is firmly connected to a ratchet wheel (4). ₃ The helical wheel (6) itself has the brake cone (14), is released in the Asia direction via a hydraulic cylinder (1) and is braked without changing the direction of rotation when the hydraulic pressure is applied by means of an axially acting compression spring (15). 3 ο means zua dressing a grinding wheel according to claim 2 _t characterized in that the established with the ratchet wheel (4) connected to the helical gear (5) with the worm wheel (6) in Singriff and is axially displaceably mounted on a rod (?), which in turn is rarely in active connection with the hydraulic cylinder (1) «, 9 0 9 8 5 0/0848 BATH 4-. Device for dressing a grinding body according to Claims 1 to 3, characterized in that a switching rod (3) is arranged which is operatively connected on the one hand by hand via a lever (8) to the rod (7) carrying the helical gear (6) is available and when _a Ausr the pawl (12) th simultaneously by moving the rod O) venting of the brake cone (14) is realized. 5. Device for dressing a grinding wheel according to claim 1 to 4-, characterized in that a nut (9) has a Lever (10) is connected to a push piston drive (11) and on the one hand the nut (9) through the arrangement of the push piston drive (11) held and only via the spindle (19) and pawl (12) a feed movement of the slide takes place, on the other hand a Rotation of the nut (9) via the thrust piston drive (11) for a further feed movement at a low feed speed of the Slide is realized, the spindle (19) via helical gear (6) is held with brake cone (14) itself. 909850/0543