DE102008012822B3 - Vise for use on clamping bench of machine i.e. numerical control machine tool, has lateral supporting surfaces provided parallel to profile rod axis, where force flow takes place between chuck jaws in clamped condition by profile block - Google Patents

Abstract

The vise has multiple magnets (17, 18) frictionally connected in chuck jaws (6, 7) on a front side. Multiple counter magnets (19, 20) or magnetically reactive metal inserts are arranged in a supporting region of a gripping yoke (8). The gripping yoke carries a profile block (8.1) that engages in an open profile of a profile rod. Multiple lateral supporting surfaces (a-d) are provided at an inner side of the profile rod and parallel to a profile rod axis, where a force flow takes place between the chuck jaws by the profile block in a clamped condition.

Description

The The invention relates to a freely positionable on machines vise with manually exchangeable chuck jaws for modular precise alignment Recording and clamping of open or closed profile bars with different profile shape for the purpose of processing a clamping bench.

to Mechanical or manual machining will be used in the profile bars Generally in mechanical, pneumatic, electromechanical or hydraulic actuated Clamping device by laterally deliverable clamping means force and form-fitting clamped. For open thin-walled Profiles will either loose a spacer to avoid their deformation inserted, firmly screwed or welded. These Method is with numerically controlled machines (NC machines) with different ones Working positions and to guarantee free access of the tools in multiple re-use unsuitable.

Known is also that interchangeable for clamping different profiles profiled jaws are used, which are firmly screwed in the vise are. For this purpose, one or more dowel screws are used regularly for exact fixation. The change of these jaws is labor intensive and time consuming. Especially if a more common Change of workpieces with different contour (profile) takes place and several vices are retooled. In this case, this time increases and impairs one's time rational production process.

With DE 202 06 615 U1 A modular clamping jaw and stop system for compact clamps has been proposed in which the outer jaws or middle jaws are fixed on adapter plates and screwed tight. Depending on the workpiece, the required clamping elements are inserted in the outer and middle jaws with the aid of a serration in fitting grooves and held by spreading elements.

This Compact tensioner is very complex and complicated to handle. When frequent Change of workpiece with different contour is the conversion of the compact tensioner turn very time consuming and labor intensive.

Generally Also known are manually interchangeable jaws for vices on their inside struck by holding magnets on the vise become.

A generic arrangement with round rod-like holding magnets in holes of the protective jaws for workbench or machine vices includes, for example, the proposal DE GbM 1 967 194 ,

With DE 969 008 also auxiliary clamping jaws have been proposed for vices, which are held by permanent magnets, which are arranged to both vise sides in a cavity of a stop of the auxiliary clamping jaws. This construction is very bulky. With clamping benches with several vices, they prevent a flush infeed of the vices with each other or a approach of the processing tools to the clamping point. As a result, a conversion of the vices would be required with additional time.

Clamping jaws with flat permanent magnets and stepped clamping surfaces for machine vices are used in the EP 1 402 996 A1 proposed. These jaws are aligned over a long side in the vise. When changing the workpiece or re-tightening, a new set-up, or at least a check of the position of the clamping jaws is required. For a chuck with several vices, which are repeatedly machined during the production process, this attachment is insufficient. The jaws can be tilted or pushed out of the vise.

In the result is interference in the production process and machine and workpiece damage can not be excluded.

For machine tendons, the while a technologically prescribed work process implemented by machine are, jaws of this genus are unsuitable.

Out DE 40 22 607 C2 is also known to use permanent magnetic parts to generate a holding force for holding and releasing freely positionable processing tools on a flat base. This system is not transferable to chucks with machined vices and interchangeable jaws.

The Invention pursues the goal of a vice with interchangeable Chuck jaws for accurate alignment modular recording and clamping of open or closed profile bars with different profile cross-section to develop.

Of the The vise should be in detail as well as in group formation on one Clamping bench can be used and free of force and form fit to the workpiece be positionable.

In particular, when clamping open to Profile bars excluded the risk of their deformation and secure clamping can be ensured.

The Upgrade or conversion The vise should be without major interruption the manufacturing process done with little time. Accordingly Do not use a screw connection to attach the chuck jaws to the vice be provided.

The pointed problem is with the proposed features in the claim 1 solved.

As executed consists of the vice of a cross member with a fixed angle bracket and a parallel deliverable stop, carried by a carriage which in turn is mounted on the cross member. Below of the crossbeam are guide rails arranged for storage on the machine bed of the processing machine.

At the stop angle or stop are for tensioning the profile bars exchangeable chuck jaws struck. The chuck jaws are made a non-magnetic wear-resistant material, preferably made of polypropylene or a non-ferrous metal. They are on the tension side adapted to the particular profile of the workpiece to be clamped. An elastic Cover made of rubber, felt, plastic or similar protects as far as possible the sensitive surface of the workpiece Clamping.

Between two stop angles is on or between the cross member one adjustable in height Bearing loosely stored. It forms the zero base for the exact flight Clamping the profile bars in the vise or in several vices a clamping bench. The adjustment of the run height is done by means of an individual different strong plane-parallel or conical intermediate layers. Their attachment is preferably carried out by operative contact with a magnet, which is fitted in the base of the support. Accordingly, the Liners with a counter magnet or with a magnetic reactive metal surface / plate fitted.

The Fixing the intermediate layers can also be achieved by a screw or clamped connection.

Compared to the Vice are the chuck jaws by form closure on a Paragraph and one or more centering elements fixed in position and in Individual directly or indirectly with the vice (angle bracket / adapter or stop) non-positively braced. The adhesion for the temporary fixation of the chuck jaws, especially for the duration of a workpiece change, done by magnets.

Corresponding the size of the vise and the tension to be unfolded comes one or more permanent magnets, switchable permanent magnets or electromagnets for use, wherein the electromagnet in the vice to the fixed stop angle and / or deliverable stop are arranged.

outgoing of the arrangement and type of magnets is in the respective clamping partner arranged a magnetic reaction element or a counter magnet.

The Magnets can Pressed into the chuck, glued in, screwed on or screwed in be.

can the magnet is not in the chuck jaw or in the stop angle or is grown, so is between the stop angle and the Chuck an adapter provided. In this case, the adapter at the same time arranged the centering for the chuck.

Of the or the magnets are preferably in the adapter or the chuck jaw sunk, so that in addition to the centering receive a free support surface remains. Outward the magnets are sealed by a cover or sunk so far that to the contact surface a thin one Material blank remains, which does not affect the magnetic flux.

imaginable but is also a flush Arrangement of the magnets to the support surface.

He follows the arrangement of the magnets in the chuck, so the stop angle or stop form the reaction element for the magnet or they are equipped with a counter magnet.

The field strength The magnets and their shape always depend on the respective one Usage.

to Position fixing of the chuck jaws in the vice is at least one Centering provided. The centering element may consist of a protruding polygonal molding or at least two cylindrical or conical Centering exist, which offset relative to the magnetic clamping axis are arranged.

The Centering pins are made of non-magnetic metal, non-ferrous metal, Ceramic or a wear-resistant Plastering.

The Centering elements for the chuck jaws are fixed to the stop bracket / stop or adapter. In the chuck jaws are for the centering the corresponding mounting holes with centering bushes arranged.

The individual centering elements are easy to maintain or the clamping and centering system can be adapted to the respective requirements or exchanged between the individual vices.

at larger chuck jaws can for safe and easy handling additional grip elements, recessed grips or holes for eyebolts be provided.

One Another feature of the invention is that the deformation-free Clamping open profile bars, especially thin-walled profile bars one span bridge is provided. At this tensioning bridge is located in the open profile side of the profile bar engaging profile block. Of the Profile block is geometrically parallel to the profile rod axis the protruding profile surfaces adapted to the profile bar. In the tensioned state is over the support surfaces of the Profile block a continuous flow of force between the at the profile bar attacking chuck jaws reached without the risk of deformation the profile bar consists.

The Fixing the clamping bridge on the vise, as with the chuck jaws by magnetic tension. These are in the upper end of the chuck jaws permanent magnets and at the ends of the tensioning bridge Countermagnets or metal inserts used. The arrangement of Countermagnets / metal insert takes place in the way that in the tensioned Condition on one side of the clamping bridge a counter magnet / metal insert is in operative contact with the permanent magnet in a chuck jaws and that the tension bridge with the opposite Counter magnet / metal insert over protruding the jaw protrudes and only when open Vice is in operative contact with the magnet of this chuck jaw.

In order to is guaranteed that the vise in the open Condition and with inserted profile bar without traction laterally postponed, d. H. in the technologically predetermined clamping position can be spent.

Of the Advantage of the invention is the variability of the vices. Of the Change the chuck jaws according to each for processing provided profile bars, the accurate alignment of long Profile bars can be made quickly, accurately and safely. The production process is only interrupted for a short time. From particular advantage is that for all profile bars to be machined the necessary chuck jaws can be kept in stock and maintained.

One Another advantage is also that in particular long profile bars with different profile in cross-section or settling in her Langsachse recorded flush in the vices of a clamping bench and can be stretched. This possibility Effectively affects the productive use of a clamping bench.

One Another important advantage is that with the proposed system especially the clamping open profile bars can be done. Reached This is the proposed by the proposed clamping bridge with its geometric shape adapted profile block. With that you can open profile bars without danger of deformation of the profiles stretched become.

Farther is an advantage that the clamping bridge in technologically required Position change of the vice not removed from the profile bar and the vice with clamping bridge in the new clamping position can be retracted. In this case, the clamping bridge by the two-sided Magnetic lock securely held to the chuck jaws. Thus, it is ensured that in a tilted the tensioning bridge easily can disengage and thus damage the profile bar with Safety is excluded.

following the innovation is presented in a schematic representation.

The Illustration shows in cross section a vice with interchangeable Chuck jaws and a support and an open in the vise inserted Profile bar with inserted clamping bridge.

As shown in the figure, the vice consists of the cross member 1 , the fixed angle bracket 2 and on the cross member 1 slidably mounted carriage 3 with stop 4 , At the bottom of the cross member 1 are still the guide rails 25 for the storage of the vice on a chuck, for example, from NC processing machines.

The support of the profile bar 24 done by the edition 9 , By means of the intermediate layers 27 the support height is adjusted. The liner 27 is by centering pin 23 opposite the edition 9 aligned and through the magnet 21 in the edition 9 and the counter magnet 22 held in the power circuit.

Aligning the liner 27 can also be done by a side stop (not shown here). It is also conceivable to screw the intermediate layer 27 ,

In practical operation, the edition 9 loose between the cross member 1 positioned. A conversion is thus easy and without special Time required.

At the stop angle 2 is the adapter 5 with chuck jaws 6 and at the stop 4 the chuck jaw 7 struck positively and non-positively. The adapter 5 itself is fixed to the stop angle 2 bolted with fitting screws (not shown here).

The clamping surfaces of the chuck jaws 6 and 7 are opposite the profile bar 24 to protect the surface of the profile bar to be clamped 24 with an elastic covering 26 made of rubber, felt or plastic. Similarly, the chuck can 6 and 7 be adapted to the particular profile of the profile rods to exciting (not shown here).

The chuck 6 and 7 gets on the adapter 5 or at the stop 4 through the magnet 11 / 12 respectively. 14 held. On the adapter 5 is the magnet 11 from stop side to stop angle 2 used. Thus, the support side to the chuck jaw 6 flush and can be easily kept clean. The magnet 11 stands with the counter magnet 12 magnetically in operative contact. The counter magnet 12 is in the chuck jaw 6 inserted and through a plastic lid 13 or closed with a pouring compound.

In the chuck jaw 7 is the magnet 14 used so deeply that he was with the stop 4 is in uninterrupted operative contact. On the tension side is the magnet 14 through the cover 15 locked.

The centering of the chuck jaws 6 and 7 takes place in each case by at least two centering pins 10 . 10 ' and 16 . 16 ' on the adapter 5 and at the stop 4 are screwed with dowel screws. In the feed baking 6 and 7 For this purpose, the corresponding centering bushes are used (not highlighted here).

In addition to the centering of the chuck jaws 6 and 7 to the clamping axis these are on the back over a gradation 6.1 and 7.1 on the upper front side of the stop bracket 2 or adapter 5 and the second stop 4 additionally fixed transversely to the clamping axis.

The selection of chuck jaws 6 and 7 for the individual vices of a chuck takes place in accordance with the profile structure of the profile bars 24 with the proviso that a precise alignment of the profile bars on the chuck is achieved.

For clamping open profile bars, as shown in the picture, comes a tensioning bridge 8th with one in the interior of the profile bar 24 engaging profile block 8.1 for use. About the lateral support surfaces a, b and c are the side surfaces of the profile bar 24 supported in the clamped state and a continuous flow of force between the chuck jaws 6 and 7 reached. At the same time with the Porfilblock 8.1 the risk of deformation of the profile bar 24 under the influence of the clamping force prevented with certainty.

For fixing the clamping bridge 8th on the vise are in the chuck jaws 6 and 7 on the upper front side magnets 17 and 18 used. At the bottom of the tensioning bridge 8th are with opposite polarity the counter magnets 19 and 20 used. The magnetic pairing 17 / 19 holds the tension bridge 8th during the clamping process. On the opposite side is the tension bridge 8th without active contact of the magnets 18 and 20 on the front side of the chuck jaw 7 on. The magnet 20 located outside the clamping area next to the frontal contact surface of the chuck jaw 7 ,

Should the vise to take a new clamping position on the guide rails 25 be offset laterally, then the carriage 3 with stop 4 and chuck 7 without removing the clamping bridge 8th into the sphere of action of the magnet 20 reset and thus the clamping process is interrupted. With the resetting is at the same time between the magnet pairing 18 / 20 causes a second adhesion. The adhesion of the magnetic mating 17 / 19 is retained.

With resetting, the form fit between the profile block 8.1 the tension bridge 8th and the profile bar 24 solved. The vice can thus without friction between the profile block 8.1 and the profile bar 24 be moved sideways in the new clamping position. If during this conversion process still the clamping bridge 8th should tilt, so the traction of the magnet pairings 17 / 19 and 18 / 20 interrupted and the tension bridge 8th automatically latches out. Damage to the profile bar 24 can be excluded as far as possible. Subsequently, the tensioning bridge 8th easily at the new position of the vise back into the open profile bar 24 used and via active magnet pairing 17 / 19 and 18 / 20 firmly fixed. Then the sled 3 brought into the clamping position and thus again the profile bar 24 tightly clamped.

A position change in the aforementioned manner can be done for one or more vices. The remaining vices remain closed and stretch the profile bar 24 in its entire length.

The clamping of the clamping bridge can be strengthened, in which the number of magnets 17 . 18 . 19 and 20 is doubled. That makes sense when the tension bridge 8th the width of the chuck jaw 6 equivalent.

1

crossbeam

2

Squares

3

carriage

4

attack

5

adapter

6

feed shoe

6.1

paragraph

7

feed shoe

7.1

paragraph

8th

span bridge

8.1

tread block

9

edition

10

spigot

11

magnet

12

Counter magnet / reaction member

13

cover

14

magnet

15

cover

16

spigot

17

magnet

18

magnet

19

magnet (Counter magnet)

20

magnet (Counter magnet)

21

magnet

22

Counter magnet / reaction member

23

spigot

24

section bar

25

guide rail

26

covering

27

liner

Claims (12)

Vice with manually interchangeable chuck jaws for modular crosstalk recording and for clamping open or closed section bars with different profile cross-section for the purpose of processing on a chuck, which includes a cross member with a fixed stop angle and a parallel stop deliverable mounted on a carriage on the cross member deliverable is, and that the chuck jaws or the adapter with chuck jaws are temporarily fixed by magnets, and that is arranged on or between the cross member, a loose and höhenjustierbare pad that forms the zero base in the vise, and that the chuck jaws to the workpiece (profile bar) geometrically adjusted and are provided with an elastic covering and that the adapter is arranged between stop angle or stop and chuck jaws, characterized in that a) the chuck jaws ( 6 . 7 ) and the adapter ( 5 ) consist of non-magnetic wear-resistant material and b) the chuck jaws ( 6 . 7 ) by a paragraph ( 6.1 and 7.1 ) and by centering elements ( 10 . 10 ' . 16 . 16 ' ) are fixed in position relative to the vice, c) the magnets ( 11 . 12 and 14 ) in the chuck jaws ( 6 . 7 ), the adapter ( 5 ) or are used directly or indirectly on the vice, d) for clamping open profile bars ( 24 ) a tension bridge ( 8th ) provided on the chuck jaws ( 6 . 7 ) rests on the front side and e) the clamping bridge ( 8th ) with the chuck jaw ( 6 ) at the stop angle ( 2 ) is frictionally fixed and f) in tension-free state, the clamping bridge with two chuck jaws ( 6 . 7 ) is frictionally fixed and g) to the frictional connection end face in the chuck jaws ( 6 . 7 ) Magnets ( 17 . 18 ) and h) in the support area of the tensioning bridge ( 8th ) Counter magnets ( 19 . 20 ) or magnetically reacting metal inserts are arranged and i) the clamping bridge ( 8th ) one in the open profile of the profile bar ( 24 ) engaging profile block ( 8.1 ), and j) the inside of the profile bar ( 24 ) and parallel to the profile rod axis lateral support surfaces (a, b, c, d) and k) the power flow between the chuck jaws ( 6 . 7 ) in the tensioned state over the profile block ( 8.1 ) he follows. Vice according to claim 1, characterized in that the chuck jaws ( 6 . 7 ), Adapters ( 2 ) and clamping bridge ( 8th ) made of plastic, preferably made of polypropylene or a non-ferrous metal. Vice according to claim 1, characterized in that one or more permanent magnet (s), turn-off permanent magnets or electromagnets are provided for the magnetic adhesion, wherein the electromagnet in the vice at the stop angle ( 2 ) and / or stop ( 4 ) are arranged. Vice according to claim 1 and 3, characterized in that the magnets ( 11 . 12 . 14 . 17 . 18 . 19 . 20 and 21 ), glued, screwed or screwed. Vice according to claim 1 and 3, characterized in that starting from the arrangement and type of magnets ( 11 or 12 . 14 . 17 . 18 and 21 ) in the respective clamping partner, a magnetic reaction element ( 22 ) or counter magnet is arranged. Vice according to claim 1, 3, 4 or 5, characterized in that the magnets ( 11 . 12 or 14 ) in the adapter ( 5 ) or chuck jaw ( 6 . 7 ) sunk and covered by a cover ( 13 . 15 ) are sealed or flush with the support surface. Vice according to claim 1, characterized in that the centering element at least from a cylindrical, conical or polygonal Centering pin ( 10 . 16 and 23 ) and a corresponding receptacle in the chuck jaw ( 6 . 7 ) and edition ( 9 ), which are offset from the magnetic axis Vice according to claim 1 and 7, characterized in that the centering pins ( 10 . 16 and 23 ) consist of non-magnetic metal, non-ferrous metal, ceramic or a wear-resistant plastic and that in the chuck jaws ( 6 . 7 ) or the edition ( 9 ) are arranged for the centering appropriate mounting holes with centering. Vice according to claim 1, characterized in that for adjusting the run length of the support ( 9 ) parallel or conical intermediate layers ( 27 ) are provided in different strength. Vice according to claim 1 or 9, characterized in that in the base of the support ( 9 ) for the intermediate layer ( 27 ) a magnet ( 21 ) is fitted. Vice according to claim 1, 9 or 10, characterized in that the intermediate layer ( 27 ) has a magnetically influenced region. Vice according to claim 1, characterized in that on the chuck jaws ( 6 . 7 ) Handle elements, recessed grips or holes for lifting eyes for lifting means are provided.