EP3294494A1

EP3294494A1 - Belt finishing device

Info

Publication number: EP3294494A1
Application number: EP17714442.5A
Authority: EP
Inventors: Michael Huber; Simon Wolber
Original assignee: Supfina Grieshaber GmbH and Co KG
Current assignee: Supfina Grieshaber GmbH and Co KG
Priority date: 2016-04-29
Filing date: 2017-03-30
Publication date: 2018-03-21
Anticipated expiration: 2037-03-30
Also published as: DE102016107965A1; KR102186634B1; WO2017186446A1; EP3294494B1; CN109153103A; KR20190002445A; EP3294494B2; CN109153103B

Abstract

The invention relates to a belt finishing device (10) comprising a guiding device (28) for guiding a finishing belt (24), a rotational drive (14) for rotating a workpiece (18) to be finished about the workpiece axis (20), and an oscillating drive (16), by means of which the finishing belt (24) and the workpiece (18) can be driven in an oscillating manner relative to each other in a direction parallel to the workpiece axis (20). A finishing belt store (26) is provided for the finishing belt (24), and the finishing belt (24) can be fed from the store to a working region (30) and from there to a collecting region (32). The collecting region (32) is equipped with a separating device (34) for separating finishing belt sections, said separating device having at least one motor-driven separating element (50, 52).

Description

Title: Bandfinishing device

description

The invention relates to a belt finishing device,

comprising a guide device for guiding

Finishing belt, a rotary drive for rotary

Driving a finishend to be machined workpiece about the workpiece axis and an oscillation drive, by means of which the finishing belt and the workpiece in a direction parallel to the workpiece axis direction relative

oscillating drivable to each other, wherein for the finishing belt a finishing tape supply is provided, from which out the finishing belt a work area and from there from a collection area can be fed.

Finish finishing of a workpiece is a method of surface machining a workpiece, also referred to as "superfinishing" or "microfinishing". In this process, an abrasive Finish tool (in the form of a finishing stone or a finishing tape) pressed onto the workpiece surface to be machined. The object to be rotated rotates

Workpiece surface. Usually, the rotation of the workpiece surface to be machined becomes an oscillating one

Movement superimposed, in which the finishing tool and the workpiece surface to be machined in the

Rotation axis move parallel directions relative to each other.

A belt finishing device is for example from the

DE 10 2014 213 194 AI known. To handle the

Finishing belts use stock rolls, from which fresh finishing belt is unwound and fed to the work area. By the abrasive intervention of a

Effective area of finish tape and finishend to

machined workpiece surface uses the effective area, so fresh at predetermined intervals

Finishing tape sections are supplied from the stock out. Worn / spent finishing belt sections are fed out of the working area to a collecting area and there to a collecting roller to be disposed of later

wound up.

In practice, there is a development in that

Provide stock rolls with finishing tapes that can be up to 300 meters in length. The winding up of such a long finishing tape is error-prone. Furthermore, the collecting rollers can be fully wound in their

State have a considerable weight, which is the

Handling the composite roles in the course of their disposal difficult. Due to the difficult handling also increases the risk that separates the wound finishing tape from a full collecting role. Overall, designed quick and easy disposal of the finishing tape is difficult.

On this basis, the present invention is based on the object, the handling of the finishing tape to

simplify.

This object is achieved in that a separating device for separating finishing belt sections is arranged in the collecting area, which has at least one motor-driven separating element.

According to the invention in the collecting area a

Separating device provided which separates with a motor-driven separating element finishing tape sections. By the separation of finishing tape sections these can be compared to a winding of a complete

Finish bands on a collecting roll are easier to collect and easier to dispose of. The motor driven

Separator allows the separator

as needed, without the need for manual intervention.

Since the separation device according to the invention in the

Collection area of the belt finishing device is arranged, an operation of the separator is possible without the

producing operation of the band finishing device, so the finishing machining a workpiece surface to interrupt. It is possible the separator

Use comparatively often, so that comparatively short finishing tape sections can be separated, for example, finishing tape sections whose maximum length is only 100 mm. These short finishing tape sections can be collected and easily disposed of, also independent of the state of consumption of the supply roll for fresh finishing tape.

In a preferred embodiment of the invention it is provided that the separating device has two separating elements in the form of cutting discs, which cooperate in a separating region. Such a separator allows a particularly reliable separation of

Finishing tape sections in a localized and thus clearly defined separation area.

A particularly reliable separation of

Finishing tape sections is made possible when the

Cutting discs a Nutmesserscheibe and a

Cover plate knife disc. These discs rotate in opposite directions of rotation and are engaged with each other such that the disc knife disc with a circumferential cutting edge in the groove portion of a

Grooved disc engages. In this engagement area, the two discs abut each other, so that the finishing belt to be cut can neither escape nor be crushed.

It is also advantageous if the cutting discs are each coupled for movement with a frictional engagement element, and if the frictional engagement elements for transmitting a

Rotary movement of the cutting discs are in frictional engagement with each other. In this way, the rotational movement can be transmitted from one blade to the other blade. As a result of the contact between the frictional engagement elements, the frictional engagement elements move in the region of

Friction at the same speed. Therefore, it is preferred if the friction elements are disc-shaped and cylindrical frictional surfaces have, whose distance to the respective axis of rotation is identical relative to each other. In this way it is possible to drive the cutting discs in a simple manner at the same rotational speed.

It is further preferred that the cylindrical

Reibschlussflächen have a radius which corresponds at least substantially to the radius of the cutting discs.

As a result, a comparatively simple construction of the separating device is made possible. In addition, arise in

Connection with embodiments of the invention described below, further advantages.

It is particularly preferred that the frictional engagement elements are arranged in the running direction of the finishing strip adjacent to the separation area. In this way, the torque transmission takes place immediately adjacent to the separation area. This is particularly advantageous when the frictional engagement elements have frictional engagement surfaces which are effective as clamping surfaces for the finishing belt. In this case, the frictional surfaces in addition to their function of torque transmission fulfill another

Function, namely the fixation of a finishing tape to be cut between the Reibschlussflächen.

If, as explained above, the frictional surfaces have at least substantially the same radius as the

Effective ranges of the separating elements, corresponds to the over the width of the finishing tape applied cutting speed at least approximately the feed rate of the

Finish bands seen in the width direction of the finishing tape. In this way, the finishing belt is clamped and fixed so that the finishing belt is not exposed to further driving forces during the cutting process, ie based on the separator neither attracted too fast nor repelled in the opposite direction.

Advantageously, in the collection area a

Collecting container for collecting separated

Finishing tape sections arranged. Such a

Collecting containers need not necessarily be able to receive finishing tape sections of a complete supply roll. It may also be a small, lightweight and thus easier to handle collection container.

The collecting container may be, for example, a collecting trough. The collecting container may be stationarily arranged on the band finishing device, so that it is not movable with respect to a machine frame of the band finishing device. However, it is also conceivable that the collecting container is arranged to be movable within the collecting area, for example along a movement axis extending parallel to a workpiece axis.

For a simple construction of the belt finishing device, it is preferable that the finishing belt to be cut passes in the collecting area in a vertical direction. Such a finishing tape can be cut particularly easily, especially when the inventive

Separator is effective in a horizontal parting plane.

It is conceivable that the separating device is arranged stationary relative to a machine frame of the belt finishing device. In this case it is possible to

severing finishing bands of the separator

supplied by management institutions, which the

Finishing tape in the work area lead by means of a Guide device drive are driven to move the finishing belt in the width direction of the finishing tape. For this case, it is preferable if a

Feed rate of the finishing strip in a direction parallel to the workpiece axis direction at least approximately equal to a voltage applied over the width of the finishing strip

Cutting speed of the separator is. In this way, the finishing tape is exposed to no further driving forces during the cutting process, so is based on the separator neither attracted too quickly nor repelled in the opposite direction.

It is also conceivable that a feed device

is provided, by means of which the separating device is movable in parallel to the workpiece axis direction. In this way, the separating device (possibly with a collecting container connected to it) parallel to the

Workpiece axis are moved so that a transection of a finishing tape can be done completely independent of the feed and the position of a guide device for guiding the finishing tape in the work area.

Preferably, a feed rate of the

Feed device at least approximately equal to a voltage across the width of the finishing strip cutting speed of the separator. In this way, the finishing tape during the Durchtrennungsvorgangs is no further

Is subjected to driving forces, so based on the separator neither attracted too fast nor in

repelled the opposite direction.

It is possible that the feed device a

includes stationary drive means, so for example a motor, based on the machine frame of the Bandfinishvorrichtung is stationary. The drive movement of such an engine can be transmitted to the separating device via gear parts (for example a drive belt).

The feed device is preferably a linear drive, for example an electric linear motor whose rotor is connected to the separating device

connected is. The linear drive is in particular a rodless pneumatic cylinder.

It is also possible to work together with the

To provide separation device movable drive device, for example, a rotary drive arranged on the separator, which drives a gear. The gear meshes with a rack that is parallel to the

Movement axis of the extends, so that the rotational movement of the gear is converted into a feed movement of the separator along the axis of movement.

Finally, it is preferred if a transmission device is provided for translating a feed movement of the separating device into a drive movement of the separating element. In this way can be dispensed with an additional motor drive for the separator. The

Transmission device includes, for example, a non-rotatably coupled to a separator gear, which is driven by a drive gear. The drive gear is driven, for example, directly by a rotary drive mentioned above or by engaging in a parallel to the axis of movement of the separator

extending rack. In both cases, one goes

Feed movement of the separator with a

Rotational movement of the separating element associated. Thus, the effect Drive device of the feed device as a motor drive for the separating element.

Further features and advantages of the invention are the subject of the following description and the drawings

Representation of preferred embodiments.

In the drawings show:

Fig. 1 is a perspective view of a

Embodiment of a belt finishing device;

Fig. 2 is a perspective view of a

Separating device of the band finishing device of FIG. 1;

Fig. 3 is a side view of the separator of

Bandfinishvorrichtung according to FIG. 1;

Fig. 4 is a sectional view of the separating device of

Bandfinishvorrichtung according to FIG. 1;

5 shows a rear view of a further embodiment of a separating device;

Fig. 6 is a plan view of the separator of FIG.

5; and

Fig. 7 is a sectional view of the separating device of

Belt finishing device according to FIG. 6.

An embodiment of a belt finishing device is indicated generally by the reference numeral 10 in the drawing. The device 10 comprises a machine frame 12 for Arrangement of a rotary drive 14 and an oscillation drive 16.

The rotary drive 14 serves to rotatably drive a workpiece 18 about a workpiece axis 20. Of the

Oscillation drive 16 serves to superimpose an oscillatory movement on this rotational movement of the workpiece 18. During this oscillation movement, the workpiece 18 reciprocates in a direction parallel to the workpiece axis 20.

The workpiece surface to be machined finishend may be, for example, the peripheral surface of a crank pin 22.

For finishing machining of a workpiece surface, the belt finishing device 10 comprises a finishing belt 24 which is fed from a finishing belt supply 26, for example a supply roll. To guide the finishing tape 24, a guide device 28 is provided. This includes in a conventional manner pressing elements which press the finishing belt 24 in a work area 30 against the finish end to be machined workpiece surface.

Out of the working area 30 comes out used

Finishing tape to a collection area 32. In this

Collection area is a separator 34 is arranged.

It is possible that the separating device 34 is arranged stationary with respect to the machine frame 12. In this case, a feed of the finishing tape 24 transversely to its direction (ie in the width direction of the finishing tape) in the region of the separating device 34 can be achieved in that the guide means 28 parallel to Workpiece axis 20 are moved, for example by means of a carriage 36th

It is understood that a band finishing device 10 usually has a plurality of guide means 28 which are arranged parallel to one another, so that seen along the workpiece axis 20 at the same time several finishing tapes 24 with different

Workpiece surfaces of a workpiece 18 can be engaged.

For the following explanation of the structure and the

Operation of the separator 34 is referenced to Figures 2 to 4. The separating device 34 is guided along a guide device 38 along a movement axis 40 and movable. The movement axis 40 extends parallel to the workpiece axis 20. The guide device 38 has a rail-shaped main body 42. The main body 42 serves to arrange a

Feed device 44 in the form of a linear drive 46. The linear drive 46 serves to drive a rotor 48, which carries the separator 34, along the movement axis 40.

The separating device 34 has two separating elements 50 and 52, which are designed in the form of two cutting discs 54 and 56. The cutting discs 54 and 56 cooperate with respective cutting edges in a separation area 58. One of the cutting edges is formed in that the cutting disk 54 is formed as a disc knife disc. The other cutting edge is formed by the fact that the cutting disc 56 is formed as Nutmesserscheibe. The cutting discs 50 and 52 rotate around each other

parallel axes of rotation 64 and 66, which are oriented parallel to a course 68 of the finishing belt 24 in the collecting area 32. To generate a pressing force in parallel to the direction 68 direction is a

Compression spring 70 is provided. This presses the cutting edge of the cutting disc 54 against the cutting edge of the cutting disc 56th

For pivotal mounting of the cutting wheels 54, 56 about the axes of rotation 64, 66 bearing body 72, 74 are provided. These are each connected to carriages 76, 78, which are movable relative to slide carriers 80, 82 along carriage axes 84, 86. The carriage axes 84, 86 are aligned parallel to each other; in particular, the axes 84 and 86 are aligned with each other. The axes 84 and 86 are perpendicular to the axes of rotation 64 and 66 and perpendicular to the

Workpiece axis 20 oriented.

The carriages 76, 78 are force-urged parallel to the carriage axes 84, 86 by means of tension springs 88 in the direction of one another. A corresponding counterforce is generated in a region 90, in which two

Reibschlusselemente 91 and 92 abut each other frictionally. The frictional engagement elements 91 and 92 are each rotatably coupled to one of the cutting wheels 54, 56. The frictional engagement elements 91, 92 are cylindrical

Friction surfaces 94, 96 which are frictionally engaged with each other in the area 90. The

Reibschlussflächen 94, 96 are for example made of a plastic, in particular Vulkollan ^®.

The region 90 is seen along the course 68 of the finishing tape 24 immediately adjacent to the

Separation area 58 arranged. To generate a rotational movement of the cutting discs 54 and 56, a transmission device 98 is provided, which translates a movement of the separating device 34 along the movement axis 40 into a drive movement of the cutting discs 54, 56. The gear mechanism 98 comprises a toothed rod 100 fixedly connected to the main body 42 and extending along the rail. The toothed rack 100 cooperates with a toothed wheel 102, which is rotatably mounted on the separating device 34 about a rotation axis 104. A rotational movement of the gear 102 is transmitted by meshing engagement on a further gear 106 which is non-rotatably connected to the frictional engagement element 92 and the cutting disc 56.

A movement of the separator 34 along the

Movement axis 40 by means of the feed device 44 causes the gear 102 rolls on the rack 100. The resulting rotational movement of the gear 102 is transmitted in the opposite direction of rotation to the gear 106, which thus rotates about the rotation axis 66, together with the frictionally engaging element 92 and the cutting disc 56th

By means of the frictional engagement between the frictional engagement element 92 and the frictional engagement element 91, the rotational movement of the cutting disc 56 is transmitted in an opposite rotational movement about the axis 64, in which the cutting disc 54 rotates.

In Figure 2, an advancing direction 108 of the feed device 44 is shown as an example, which in a

Rotary movement 110 of the gear 102 is translated. Based on the direction of rotation 110, the gear 106 rotates

in opposite directions about the axis 66; the cutting wheel 54 rotates relative to the direction of rotation 110 in the same direction about the axis 64th

When the separating device 34 is moved in the direction of advance 108 in the direction of the finishing belt 24, the finishing belt 24 arrives in the engagement region 90 between the belts

Reibschlussflächen 91 and 92 and is from the perspective of

Finish bands 24 drawn into the engagement portion 90 so that the frictional surfaces 94, 96 are effective as clamping surfaces for the finishing belt 24. In this way, the finishing belt 24 to be cut is fixed in the region 90 and can be severed immediately adjacent thereto in the separation region 58. Since the cutting edges of the cutting discs 54, 56 have substantially the same diameter as the cylindrical frictional surfaces 94, 96, which is over the width of the finishing tape 24 adjacent

Cutting speed at least approximately equal to the

Peripheral speed of the Reibschlussflächen 94, 96 in the area 90. In this way, the finishing belt 24th

be severed as far as possible without transverse force.

Portions separated from the finishing belt 24 may be collected in a sump 112. In which

Collecting container 112 is, for example, a collecting trough 114, which is movable together with the separating device 34 along the movement axis 40. Finishing belt sections collected in the collection trough 114 can be disposed of from there or else only temporarily stored in the collecting trough 114 and from there one

stationary additional collecting 116 are supplied. For the transfer of finishing tape sections from the

Collecting trough 114 in the additional collecting container 116, for example, slide or blower can be used. It It is also conceivable that the collecting channel 114 extends along the entire length of the rail 42.

Disposal of the collecting channel 114 can by means of a conveyor belt. Such a conveyor belt extends

preferably along a bottom of the collecting trough 114.

A manual disposal of the collecting channel 114 is possible.

Hereinafter, with reference to Figures 5 to 7, another embodiment of a separator 34th

described. This separating device 34 is a stationary separating device, which therefore not along a movement axis 40 parallel to the

Workpiece axis 20 is movable in a feed direction. The separating device 34 according to FIGS. 5 to 7 has a drive motor 118 which drives a cutting disk 56 about an axis of rotation 66 in the direction of rotation. A transmission of the rotational movement to a further cutting disk 54 about an axis 64 takes place by means of frictional engagement elements 91 and 92, as described above with reference to FIGS. 2 to 4

described.

The axes 64 and 66 are each at approximately parallel to the workpiece axis 20 extending beams 120, 122nd

arranged. The carriers 120, 122 are acted upon in directions facing each other with tension springs 88. The corresponding counterforce arises in the engagement region 90 by

Pressure contact of the friction elements 90 and 92nd

In order to be able to remove the cutting discs 54 and 56 from one another in a direction perpendicular to the workpiece axis 20 in the maintenance case, a spacing device 124 is provided intended. This has a spindle axis 126 which is supported on the carrier 120 and is effective against the carrier 122, so that the carriers 120 and 122 against the force of the tension springs 88 can be pressed apart.

Preferably, one of the carriers is stationary, for example the carrier 120, while the other carrier is movable, for example the carrier 122.

To simplify the feeding of finishing tape 24 into the separating region 58, the separating device 34 according to FIGS. 5 to 7 comprises guide elements 126, 128 which are effective in a guiding plane which is oriented perpendicular to the running direction of the finishing tape 24. The guide elements 126, 128 define a V-shaped tapered guide space (see Figure 6).

Incidentally, with regard to the structure and the

Operation of the separator 34 according to Figures 5 to 7 to the above description to Figures 1 to 4 reference.

Claims

claims

Belt finishing device (10) comprising a

Guiding device (28) for guiding the finishing belt

(24), a rotary drive (14) for rotatably driving a finishend to be machined workpiece

(18) about the workpiece axis (20) and a

Oscillation drive (16), by means of which the

Finishing belt (24) and the workpiece (18) in a direction parallel to the workpiece axis (20) direction are oscillated relative to each other, wherein for the finishing belt (24) a finishing tape supply (26) is provided, from which out the finishing belt (24) Workspace (30) and from there one

Collection area (32) can be fed, thereby

characterized in that in the collecting area (32) a separating device (34) for separating

Finishing tape sections is arranged, which

at least one motor-driven separating element

(50, 52).

Bandfinishing device (10) according to claim 1, characterized in that the separating device (34) has two separating elements (50, 52) in the form of separating discs (54, 56) which are arranged in a separating region (58).

interact.

Bandfinishvorrichtung (10) according to claim 2, characterized in that the cutting discs (54, 56) a grooved disc and a disc knife disc

include.

Bandfinishing device (10) according to claim 2 or 3, characterized in that the cutting discs (54, 56) each with a frictional engagement element (91, 92) are motion coupled, and that the

Frictional engagement elements (91, 92) for transmitting a rotational movement of the cutting discs (54, 56) are in frictional engagement with each other.

Belt finishing device (10) according to claim 4, characterized in that the frictional engagement elements (91, 92) are arranged in the running direction (68) of the finishing belt (24) adjacent to the separating region (58).

Belt finishing device (10) according to claim 4 or 5, characterized in that the frictional engagement elements (91, 92) friction frictional surfaces (94, 96) which are effective as clamping surfaces for the finishing belt (24).

Belt finishing device (10) according to one of

preceding claims, characterized in that in the collecting area (32) a collecting container (112) for collecting separated finishing tape sections

is arranged.

Belt finishing device (10) according to one of

preceding claims, characterized in that a feed rate of the finishing strip (24) in a direction parallel to the workpiece axis (20) is at least approximately equal to a over the width of the finishing strip (24) adjacent cutting speed of the separating device (34).

Belt finishing device (10) according to one of

preceding claims, characterized in that a feed device (44) is provided, by means of which the separating device (34) in to the

Workpiece axis (20) parallel direction is movable.

10. strip finishing device (10) according to any one of the preceding claims, characterized in that a feed speed of the feed device (44) at least approximately equal to one over the width of the finishing strip (24)

Cutting speed of the separator (34).

11. Bandfinishvorrichtung (10) according to claim 9 or 10, characterized in that the feed device (44) comprises a stationary drive means or together with the separating device (34) movable drive means.

12. Bandfinishvorrichtung (10) according to claim 11, characterized in that a transmission device (98) for translating a feed movement of

Separating device (39) in a drive movement of the separating element (50, 52) is provided.