KR20190002445A - Band finishing device - Google Patents

Abstract

The present invention relates to a band closure device 10 which comprises a guide device 28 for guiding the closure band 24, a rotation device 28 for rotationally driving the component 18 to be finished, And a vibration drive device (16) for enabling the drive device (14) and the finish band (24) and the component (18) to be actuated by vibrating parallel to each other about the component axis, Closing band storage 26 And a finishing band 24 can be fed from the finishing band storage to the working area 30 and fed from the working area to the collection area 32 and a cutting device 34) are arranged in a collection area (32), characterized in that the finishing band cross-section has at least one cutting element (50, 52) which is operated by a motor.

Description

Band finishing device

The present invention relates to a band finishing device, which comprises a guide device for guiding a finishing band, a rotary drive for rotationally driving a workpiece to be finished, A rotation driving device and an oscillation driving device for enabling the finishing band and the parts to operate while vibrating parallel to each other with respect to the component shaft, wherein a finishing band storage for the finishing band is provided , A finishing band may be supplied from the finishing band storage to the working area and from the working area to the collecting area Can be supplied.

The finishing of parts is a process for machining the surface of a part, such as a process called "super finishing" or "micro finishing process". In this process, a polishing finishing stone (in the form of a finishing stone or finish band) is applied to the surface of the part to be machined. At this time, the surface of the part to be machined is rotated. In addition, the vibration movement overlaps with the rotation of the component surface to be machined. During the vibration movement, the finishing tool and the component surface to be machined move in directions parallel to each other with respect to the rotation axis.

For example, DE 10 2014 213 194 A1 discloses a band finishing device. In order to operate the finishing band, a feed roller is used, from which a new finishing band is released and fed to the working area. A new finish band cross section is supplied from the reservoir at regular intervals since the working surface of the finish band and the surface of the part to be finished are engaged in the abrasive state to wear. The worn / consumed finish band cross section is fed from the working area to the collection area and is wound on a collecting roller which is later to be discarded.

In fact, there is an inventive idea for providing a feed roller with a finish band having a length of 300 m. Winding such a long finish band can cause defects. In addition, since the collecting rollers can weigh a considerable amount with the collecting rollers fully wound, this makes the operation of the collecting rollers difficult in relation to the disposal treatment of the collecting rollers. This difficult operation limits the operation itself, increasing the risk that the wound finishing band is separated from the fully rolled collecting rollers. On the whole, it is difficult to dispose of the quick and easy finish band.

It is an object of the present invention to simplify the operation of the finishing band.

This object of the invention is solved by arranging a cutting device provided for cutting a section of a finishing band in the collection area, wherein the cutting device comprises at least one cutting element which operates by a motor do.

According to the invention, the collection area is provided with a cutting device which cuts the cross-section of the finishing band through a motor-operated cutting element. Compared to winding the entire finish band, due to the cutting of the finish band cross-section according to the invention, the finish band cross-section can be more easily wound on the collecting roller and more easily discarded. The motor-operated cutting element is provided so as to be able to control the cutting device without manual operation if necessary.

Since the cutting apparatus according to the present invention is arranged in the collection area of the band finishing apparatus, the cutting apparatus can be operated without interrupting the operation of the band finishing apparatus, that is, the finish processing of the surface of the part. Since the cutting device can be used relatively often, a finish band cross section corresponding to a relatively short finish band cross section, for example a length of up to 100 mm, can be cut. This short-end band cross-section can be collected regardless of the depletion state of the feed rollers providing a new finish band, and can be disposed of in a simple manner.

According to a preferred embodiment of the present invention, the cutting apparatus has two cutting elements provided in the form of a cutting disc, the two cutting elements acting together in the cutting area. Such a cutting device is provided so as to be able to cut a section of the finishing band particularly reliably in a locally limited and clearly defined cutting area.

When the cutting disc comprises a groove cutter disc and a plate cutter disc, the cross section of the finish band can be particularly reliably cut. The disc is rotated in opposite rotational directions and the disc is interlocked so that the plate cutter disc is engaged with the groove area of the groove cutter disc along with the cutting edge to which it is rotated. Since the two discs in this engaged area lie side by side, the finish band to be cut can not be redirected or squeezed in that area.

Also preferably, each of the cutting disks is movably connected to a frictional connecting element, and the friction connecting elements are frictionally connected to each other to transmit rotational motion of the cutting disk. In this way, the rotational motion of the cutting disk can be transmitted to another cutting disk. Due to the contact between the friction coupling elements, the friction coupling element can move at a rotational speed of the cutting disk in the friction connection area. Preferably, therefore, the friction coupling elements are formed in a disk shape and have a cylindrical frictional connection surface, wherein the intervals of the cylindrical frictional connection surfaces with respect to the respective rotation axes are equal to each other. In this way, the cutting disk can be easily operated at the rotating speed of the cutting disk.

Also preferably, the cylindrical frictional connection surface has such a radius at least corresponding to the radius of the cutting disk. As a result, a relatively simple configuration of the cutting device can be achieved. Further, another advantageous aspect of the present invention is described as follows.

Particularly preferably, the friction coupling elements are arranged adjacent to the cut region when viewed in the direction of rotation of the finishing band. In this way, a rotational torque can be transmitted in the immediate vicinity of the cut region. With regard to the above, particularly preferably, the friction connecting element has a friction connecting surface acting as a clamping surface for the finishing band. In this case, the frictional connection surface fulfills another function for the rotary torque transfer function, namely the function of securing the finishing band to be cut between the frictional connection surfaces.

As described above, when the frictional connection surface has the same radius as the operating area of the cutting element, the cutting speed proceeding from the width of the finishing band, as viewed in the width direction of the finishing band, Roughly corresponds. In this way, the finishing band is clamped and secured such that the finishing band is not exposed to another driving force during the cutting process, that is, the finishing band moves too fast or does not collide in the opposite direction with respect to the cutting apparatus.

According to a preferred approach, the collection vessels provided for collecting the severed finish band cross-sections are arranged in the collection area. Such a collection container is not necessarily provided for collecting the finish band section of the entire feed roller. Small, lightweight, and simple to operate collecting vessels may be provided.

For example, a collecting gutter may be provided as a collecting container. Since the collecting container can be arranged fixedly to the band finishing device, such collecting container can not move with respect to the frame of the band finishing device. It is also contemplated that the collection vessel is arranged movably within the collection area, for example along a movement axis extending parallel to the component axis.

For the simple construction of the band closure device, it is preferable that a finishing band to be cut is provided in the vertical direction in the collection area. Such a finish band can be cut much more easily, especially if the cutting device according to the invention works effectively on horizontal cutting surfaces.

With respect to the frame of the band finishing apparatus described above, it can be considered that the cutting apparatus is arranged in a fixed state. In this case, a finishing band to be cut can be supplied to the cutting device, which is possible by driving a guide device guiding the finishing band to the working area in order to move the finishing band in the width direction of the finishing band, Do. In this case, it is preferable that the feed rate of the finish band, which travels in a direction parallel to the part axis, is at least approximately equal to the cutting speed of the cutting device proceeding at least in the width of the finish band. In this manner, such a finish band is provided that the finish band is not exposed to another driving force during the cutting process, that is, the finish band moves too fast with respect to the cutting device, or does not collide in the opposite direction.

It is also contemplated that a transfer device is provided, wherein the cutting device can be moved in a direction parallel to the tool axis via the transfer device. In this way, since the cutting device (optionally including the collecting container associated with the cutting device) can move parallel to the part axis, the feeding and positioning of the guide device for guiding the finish band to the working area The cutting of the finishing band can be carried out completely irrespective of the thickness of the finishing band.

Preferably, the conveying speed of the conveying device is at least about the same as the cutting speed of the cutting device in relation to the finishing band. In this manner, such a finish band is provided that the finish band is not exposed to another driving force during the cutting process, i.e. the finish band moves too fast or does not hit in the opposite direction with respect to the cutting device.

The transfer device may comprise a stationary drive, for example a motor, which is fixed to the frame of the band finishing device. The driving motions of such a motor may be transmitted to the cutting device via a transmission component (e.g., a drive belt).

Preferably, the transfer device is provided with a linear actuator, for example, an electric linear motor, and the rotor of the linear motor is connected to the cutting device. In particular, a linear drive device may be provided with a pneumatic cylinder without a piston rod.

It is also contemplated to provide a drive device that can move with the cutting device, such as a rotary actuator, which is arranged in the cutting device and drives a gear wheel. Since the gearwheel is engaged with a gear rack extending parallel to the movement axis, the rotational movement of the gearwheel is converted into the transferring motion of the cutting device along the axis of motion.

Finally, preferably, a driving device is provided for switching the feeding motion of the cutting device to the driving direction of the cutting element. In this way, the motor drive device provided further for the cutting element can be abandoned. The drive includes, for example, a gear wheel that is non-rotatably connected to the cutting element, and the gear wheel is driven by a pinion gear. The pinion gear is driven, for example, by engaging with a gear rack directly driven by the above-described rocking-type drive device or extending parallel to the axis of motion of the cutting device. In both of the cases described above, the transfer motion of the cutting device is accompanied by the rotational movement of the cutting element. Thereby, the drive device of the transfer device operates as a motor drive device for the cutting element.

Further features and advantages of the present invention will be described hereinafter, and preferred embodiments will be described in detail with reference to the following drawings.

1 shows a perspective view of an embodiment of a band finishing apparatus;
Fig. 2 is a perspective view of the cutting apparatus provided in the band finishing apparatus according to Fig. 1;
Fig. 3 is a side view of a cutting apparatus provided in the band finishing apparatus according to Fig. 1;
Figure 4 shows in a cross-sectional view a cutting apparatus provided in the band finishing apparatus according to Figure 1;
Figure 5 shows another embodiment of the cutting device in a rear view;
Fig. 6 is a top view of the cutting apparatus according to Fig. 5;
Fig. 7 is a sectional view of the cutting apparatus provided in the band finishing apparatus according to Fig. 6;

Embodiments of the band finishing apparatus are all indicated in the drawings by the reference numeral 10. The apparatus 10 includes a frame 12 for an arrangement of a rotation drive device 14 and an oscillation drive device 16.

The rotation drive device 14 is used to rotationally drive the component 18 about the component shaft 20. The oscillation drive device 16 is used to cause the oscillating motion to overlap with this rotational movement of the part 18. [ In this oscillatory motion, the component 18 reciprocates in a direction parallel to the component axis 20.

For example, the circumferential surface of the crank pin 22 may be provided as the surface of the part to be finished.

To finish the part surface, the band finishing apparatus 10 includes a finishing band 24, which is fed from a finishing band reservoir 26, for example a feed roller. To guide the finishing band 24, a guide device 28 is provided. This guide device comprises a press element according to known methods which pressurize the closing band 24 in the working area 30 towards the part surface to be finished.

The dead band consumed from the work area 30 is transferred to the collection area 32. [ In this collection area, a cutting device 34 is arranged.

The cutting device 34 may be arranged in a fixed state relative to the frame 12. In this case, the transfer of the finishing band 24 in the region of the cutting device 34 proceeds transversely with respect to the direction of movement of the finishing band (i.e. the width direction of the finishing band) 28 may be moved in parallel relative to the component shaft 20, for example, via the carriage 36.

Of course, because the band-stop apparatus 10 can include a plurality of guide devices 28, which are generally arranged in parallel with each other, a number of finish bands 24 Can be engaged simultaneously with the different component surfaces of the component (18).

The configuration and functioning of the cutting device 34, which will be described next, is shown in Figs. The cutting device 34 can be guided and moved in the longitudinal direction of the axis of motion 40 along the guide device 38. The axis of motion 40 extends parallel to the component axis 20. The guide device 38 may include a body 42 in the form of a rail. The body 42 is used to arrange the transfer device 44 in the form of a linear drive device 46. The linear drive device 46 is used to drive the rotor 48 supporting the cutting device 34 along the axis of motion 40.

The cutting device 34 has two cutting elements 50, 52, which are formed in the form of two cutting disks 54, 56. The cutting discs 54, 56 cooperate with respective cutting edges in the cutting area 58. One cutting edge of the cutting edge can be formed such that the cutting disk 54 is formed as a plate cutter disk. Another cutting edge may be formed such that the cutting disk 56 is formed as a groove cutter disk as well.

The cutting discs 50 and 52 rotate about mutually parallel rotational shafts 64 and 66 and the rotational shafts are parallel to the moving direction 68 of the finish band 24 provided in the collection area 32 Lt; / RTI > A compression spring (70) is provided to generate pressure in a direction parallel to the direction of movement (68). This compression spring applies the cutting edge of the cutting disc 54 toward the cutting edge of the cutting disc 56. [

To pivot mount the cutting disks 54, 56 about their rotational axes 64, 66 Bearing bodies 72 and 74 are provided. These bearing bodies are each connected to carriages 76 and 78 and the carriage can be moved along carriage shafts 84 and 86 toward carriage carriers 80 and 82. The carriage shafts 84, 86 are oriented parallel to each other, and in particular, the shafts 84, 86 lie on one another. The axes 84 and 86 are oriented perpendicular to the axis of rotation 64 and 66 and perpendicular to the axis of the component 20.

The carriages 76 and 78 can exert forces in directions parallel to the carriage shafts 84 and 86 through tension springs 88. A corresponding counterforce is created in the area 90 where the two friction coupling elements 91, 92 are provided against which they are frictionally connected to one another. Each of the friction coupling elements 91, 92 is non-rotatably connected to the cutting disks 54, 56. The friction connecting elements 91 and 92 have cylindrical frictional connecting surfaces 94 and 96 which are in frictional contact with each other in the region 90. The friction connecting surfaces 94, 96 may be made of, for example, plastic, in particular Vulkollan (R).

The region 90 is arranged immediately adjacent the cutting region 58 when viewed along the direction of movement 68 of the band 24.

A gear device 98 is provided for generating a rotational movement of the cutting disc 54,56 which is arranged to move the movement of the cutting device 34 along the axis of movement 40 And switches to the driving motion of the cutting disks 54 and 56. The gear device 98 includes a gear rack 100 rigidly connected to the body 42 and extending in the longitudinal direction of the rail. The gear rack 100 cooperates with a gear wheel 102 which is fixed to the cutting device 34 so as to be rotatable about an axis of rotation 104. The rotational movement of the gear wheel 102 is transmitted to another gear wheel 106 via engagement and the other gear wheel is non-rotatably connected to the friction coupling element 92 and the cutting disk 56 .

The movement of the cutting device 34 in the longitudinal direction of the axis of motion 40 by the conveying device 44 causes the gear wheel 102 to roll in the gear rack 100. The rotational movement of the gearwheel 102 resulting from the foregoing is transmitted to the gearwheel 106 in the opposite rotational direction and the gearwheel is rotated together with the friction coupling element 92 and the cutting disc 56 66).

Due to the frictional connection between the friction coupling element 92 and the friction coupling element 91 the rotational motion of the cutting disk 56 causes the cutting disk 54 to rotate counterclockwise about the axis 64, Lt; / RTI >

Figure 2 shows, for example, the transport direction 108 of the transport device 44, which is switched to the rotational movement 110 of the gear wheel 102. With respect to the direction of rotation 110, the gear wheel 106 rotates in an opposite direction about an axis 66; The cutting disc 54 rotates about the axis 64 in the same direction with respect to the direction of rotation 110.

When the cutting device 34 moves in the transport direction 108 in the direction of the finish band 24 the finish band 24 reaches the engagement area 90 between the friction connection faces 91 and 92, 96 is inserted into the engagement area 90 when viewed in the direction of the band 24 so that it acts as a clamping surface for the closure band 24. In this manner, the finishing band 24 to be cut may be fixed in the area 90 and cut in the cutting area 58 immediately adjacent to the area. Since the diameter of the cutting edge of the cutting discs 54 and 56 is generally the same as the diameter of the cylindrical friction connecting surfaces 94 and 96 the cutting speed progressing from the width of the finishing band 24, 96 at the circumferential speed of the friction connecting surface 94, In this manner, the finish band 24 can be cut without lateral tension.

The section cut from the closure band 24 can be collected in the collection vessel 112. A collection trough 114 may be provided as the collection container 112 and the collection trough may be moved along the movement axis 40 with the cutting device 34. [ The finish band cross section collected in the collecting trough 114 may be discarded from the collecting trough or may be temporarily stored in the collecting trough and then supplied to the stationary additional collecting container 116 from the collecting trough. For example, a slider or fan may be used to feed the finishing band cross-section from the collection trough 114 described above to the additional collection vessel 116. It is also contemplated that the collecting trough 114 extends along the entire length of the rail 42.

The waste treatment in the collecting trough 114 may be carried out through a conveyor belt. Such a conveyor belt preferably extends along the bottom of the collection trough 114.

Further, the collecting trough 114 may be manually dismounted.

Another embodiment of the cutting device 34 is described below with reference to Figs. As such a cutting device 34, there is provided a stationary cutting device, which can not be moved in the transport direction along the axis of motion 40 parallel to the component axis 20. [ The cutting device 34 according to FIGS. 5 to 7 includes a drive motor 118 which drives the cutting disk 56 in the rotational direction about the rotational axis 66. As shown in FIG. Conveying the rotary motion about the axis 64 to another cutting disc 54 is effected through the friction coupling elements 91, 92 as described in relation to FIGS.

Each of the shafts 64, 66 is arranged in a carrier 120, 122 extending approximately parallel to the component shaft 20. The carriers 120 and 122 are actuated in directions opposite to each other via a tension spring 88. [ A corresponding counter force is created in the engagement area 90 through the pressure contact of the friction coupling elements 90,

At the time of maintenance, spacers 124 may be provided to keep the cutting disks 54,56 spaced apart from one another in the vertical direction relative to the component shaft 20. The spindle shaft 126 is supported on the carrier 120 and opposes the carrier 122 so that the carriers 120 and 122 are urged by the force of the tension spring 88 Can be pressed against each other. Preferably, one of the carriers, e.g., carrier 120, is stationary while another carrier, e.g., carrier 122, is movable.

The cutting device 34 according to Figs. 5-7 comprises a guide element 126, 128, which is in the form of a stop band 24 On the guide surface provided in a direction perpendicular to the direction of movement of the guide member. The guide elements 126 and 128 define a V-shaped tapered guide chamber (see FIG. 6).

In addition, the configuration and functioning of the cutting device 34 according to Figs. 5 to 7 are related to those described in Figs. 1 to 4. Fig.

Claims (12)

A guide device 28 for guiding the finishing band 24, a rotation drive device 14 and a finishing band 24 and a part 18 for rotationally driving the part 18 to be finishing about the component axis, And a vibration drive device (16) for allowing the parts to be oscillated parallel to one another with respect to the component shaft, wherein a finish band reservoir (26) is provided for the finish band (24) 24 can be supplied to the work area 30 and can be supplied from the work area to the collection area 32,
A cutting device (34) for cutting a finishing band section is arranged in a collection area (32), said finishing band section having at least one cutting element (50, 52) Closing device (10). The method according to claim 1,
Characterized in that the cutting device (34) comprises two cutting elements (50, 52) in the form of cutting discs (54, 56) (10). 3. The method of claim 2,
Wherein the cutting discs (54, 56) comprise a groove cutter disc and a plate cutter disc. The method according to claim 2 or 3,
Each of the cutting discs 54,56 being movably connected to a friction coupling element 91,92 which transmits the rotational movement of the cutting disc 54,56, (10). ≪ RTI ID = 0.0 > 11. < / RTI > 5. The method of claim 4,
Characterized in that the friction coupling elements (91, 92) are arranged adjacent the cutting area (58) when viewed in the direction of movement of the finishing band (24). The method according to claim 4 or 5,
Characterized in that the friction connecting elements (91, 92) have frictional connecting surfaces (94, 96), which act as clamping surfaces for the closing band (24). 7. The method according to any one of claims 1 to 6,
Characterized in that the collection area (32) is arranged with a collection container (112) for collecting cut end fin band sections. 8. The method according to any one of claims 1 to 7,
Characterized in that the conveying speed of the finishing band (24) running in a direction parallel to the part axis (20) is at least about the same as the cutting speed of the cutting device (34) running at the width of the finishing band Band closure device (10). 9. The method according to any one of claims 1 to 8,
Characterized in that a transfer device (44) is provided which allows the cutting device (34) to be moved in a direction parallel to the part axis (20). 10. The method according to any one of claims 1 to 9,
Characterized in that the conveying speed of the conveying device (44) is approximately equal to the cutting speed of the cutting device (34) proceeding at least in the width of the finishing band (24). 11. The method according to claim 9 or 10,
Characterized in that the conveying device (44) comprises a stationary drive or a drive capable of moving with the cutting device (34). 12. The method of claim 11,
Characterized in that a drive device (98) is provided for switching the transfer motion of the cutting device (39) to the drive motions of the cutting elements (50, 52).

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