DK173529B1

DK173529B1 - Apparatus for removing items from punching tool

Info

Publication number: DK173529B1
Application number: DK199801380A
Authority: DK
Inventors: Christian Illegaard Nielsen
Original assignee: Christian Illegaard Nielsen
Priority date: 1998-10-27
Filing date: 1998-10-27
Publication date: 2001-02-05
Also published as: DK199801380A; EP0997209A2

Description

DK 173529 B1 lDK 173529 B1 l

Den foreliggende opfindelsen angår et apparat til udtagning af emner fra stanseværktøj og af den i indledningen til krav 1 angivne art.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing items from punching tools and of the kind specified in the preamble of claim 1.

I forbindelse med traditionelle excenterpressere, der er såkaldte mekaniske pressere, an-5 vendes ofte et såkaldt bloksnitværktøj, der er en værktøjstype, hvor lokning af eventuelle huller sker samtidigt med, at emnets udvendige kontur stanses. På denne måde kan opnås et mere plant og præcist emne - set i forhold til udstansning ved hjælp af følgesnitværktøj. Anvendelse af bloksnitværktøjer medfører imidlertid sædvanligvis den ulempe, at emneme skal udtages af værktøjet manuelt, pneumatisk eller med robot, hvil-10 ket i alle tilfælde betyder, at processen er relativ langsom, fordi pressen ved manuel udtagning skal betjenes med 2-håndsudløsning, eller i de øvrige tilfælde bedenes via en PLC-styring. Manuel udtagning giver normalt en cyklustid svarende til ca. 20 emner pr. min. Ved pneumatisk eller robotudtagning kan opnås en cyklustid svarende til ca. 30-40 emner pr. min.In the case of traditional eccentric presses which are so-called mechanical presses, a so-called block cut tool is often used, which is a type of tool in which the closing of any holes occurs simultaneously with the external contour of the workpiece being punched. In this way, a more level and precise subject can be obtained - in relation to punching with the aid of follow-up tools. However, the use of block cut tools usually results in the disadvantage that the blanks must be taken out by the tool manually, pneumatically or with a robot, which in any case means that the process is relatively slow because the press is manually operated with 2-hand release, or in the other cases, it is operated via a PLC control. Manual tapping usually gives a cycle time equal to approx. 20 topics per mine. By pneumatic or robotic removal a cycle time corresponding to approx. 30-40 items per mine.

1515

Opfindelsen har til formål at angive et apparat til udtagning af emner fra stanseværktøj af den indledningsvis nævnte art, og som ved hjælp af enkle apparattekniske foranstaltninger gør det muligt at opnå en betydeligt reduceret cyklustid svarende til 60-120 emner pr. min.The invention has for its object to provide an apparatus for removing items from punching tools of the kind mentioned initially and which, by means of simple apparatus technical measures, enables a significantly reduced cycle time corresponding to 60-120 parts per unit. mine.

2020

Apparatet ifølge opfindelsen er kendetegnet ved, at en udragende konsolaim, der er fastgjort til en overpart af stanseværktøjet, er drivforbundet med en lodret forskydelig tandstang, der fortrinsvis via et tandhjulsgear og et tandhjulsdrev er drivforbundet med udtagerarmen, at konsolarmen desuden er drivforbundet med en luftcylinder, der er ind-25 skudt mellem de respektive konsolarme, og som forsyner sugekopmundstykket med både vakuum og trykluft, og at udtagerarmen omfatter og/eller samvirker med styreorganer, der samvirker med således udformede styreflader i apparathuset, at udtager-armen og dermed sugekopmundstykket i det mindste under den sidste del af den indad-rettede bevægelse mod emnet, der skal udtages, bevæges indad/nedad, og at udtager-30 armen til at begynde med bevæges opad/udad, når den igen bevæges ud af værktøjet med emnet. Ved hjælp af enkle apparattekniske foranstaltninger opnås herved et apparat, der til brug ved fuldautomatisk udtagning af emner fra et bloksnitværktøj af en excenter- 2 DK 173529 B1 presse gør det muligt at opnå en betydeligt reduceret cyklustid svarende til 60-120 emner pr. min.The apparatus according to the invention is characterized in that a protruding bracket attached to an upper part of the punching tool is driven by a vertically displaceable gear, which is preferably driven by a gear gear and a gear drive, the bracket arm is also connected to an air by inserted between the respective console arms providing the suction nozzle with both vacuum and compressed air, and the dispensing arm comprising and / or cooperating with control means which cooperate with the control surfaces thus formed in the apparatus housing, the suction arm and thus the suction head nozzle. at least during the latter part of the inwardly directed movement toward the workpiece to be taken out, it moves inward / downward, and initially the take-off arm moves upward / outward when it is again moved out of the tool with the workpiece. By means of simple apparatus technical measures, an apparatus is hereby obtained which for use in fully automatic extraction of items from a block cut tool by an eccentric press enables a significantly reduced cycle time corresponding to 60-120 parts per unit. mine.

Det skal yderligere påpeges, at excenterpressen ved at udnytte de mekaniske egenskaber 5 ved udtagerapparatet ifølge opfindelsen kan indstilles til fortsat slag, dvs. at excenterpressen ikke skal afvente startsignal eksempelvis fra en PLC-styring men simpelthen kan arbejde kontinuerligt, hvorfor det er muligt at opnå en meget betydelig forøget kapacitet på 60-120 emner pr. min.It should be further pointed out that, by utilizing the mechanical properties 5 of the dispenser according to the invention, the eccentric press can be set for continued stroke, ie. that the eccentric press does not have to wait for the starting signal, for example, from a PLC control but can simply work continuously, which is why it is possible to achieve a very significant increased capacity of 60-120 parts per unit. mine.

10 Hensigtsmæssigt er apparatet ifølge opfindelsen udformet således, at en nedre endedel af nævnte luftcylinder er fastgjort til konsolarmen og at nævnte stempelstang af nævnte luftcylinder er forbundet med den bevægelige konsolarm, f.eks. ved hjælp af et vinkelbeslag, at det nedre hulrum af luftcylinderen, hvori der, når den bevægelige konsolarm bevæges opad, skabes et vakuum, er forbundet med et vakuumkammer udformet i 15 en bageste del af apparathuset, og at det øvre hulrum af luftcylinderen, hvori der, når konsolarmen bevæges opad, skabes trykluft, er forbundet med et trykluftkammer udformet i nævnte bageste del af apparathuset.Conveniently, the apparatus according to the invention is designed such that a lower end portion of said air cylinder is attached to the bracket arm and said piston rod of said air cylinder is connected to the movable bracket arm, e.g. by means of an angle bracket, that the lower cavity of the air cylinder, in which, when the movable console arm is moved upwards, a vacuum is created, connected to a vacuum chamber formed in a rear part of the apparatus housing, and that the upper cavity of the air cylinder, in which which, when the console arm is moved upwards, compressed air is created, connected to a compressed air chamber formed in said rear part of the apparatus housing.

For på enkel måde yderligere at automatisere udtagningen af emner ved hjælp af appa-20 ratet ifølge opfindelsen, er dette fortrinsvis udformet således, at sugekopmundstykket er forbundet med nævnte vakuumkammer via en luftstyreventil, der aktiveres (åbnes), når sugekopmundstykket er inde i værktøjet for at hente et emne, og at sugekopmundstykket er forbundet med nævnte tiykluftkammer via en luftstyreventil, der aktiveres (åbnes), når sugekopmundstykket er ført ud af værktøjet for at aflevere et emne. Med andre ord er 25 emneudtagningsapparatet ifølge opfindelsen selvforsynende, hvad angår såvel vakuum som trykluft til drift af sugekopmundstykket, hvilket i øvrigt er meget fordelagtigt, fordi emneudtagningsapparatet derved i det hele taget ikke kræver nogen som helst ekstern energiforsyning af elektricitet, trykluft, vakuum eller hydraulik.In order to further automate the removal of items by means of the apparatus according to the invention, this is preferably designed such that the suction nozzle is connected to said vacuum chamber via an air control valve which is activated (opened) when the suction nozzle is inside the tool for picking up a workpiece, and that the suction cup nozzle is connected to said pressure air chamber via an air control valve which is activated (opened) when the suction cup nozzle is removed from the tool to deliver a workpiece. In other words, the workpiece withdrawal apparatus according to the invention is self-sufficient in both vacuum and compressed air for operation of the suction nozzle, which is otherwise very advantageous, since the workpiece withdrawal unit thus does not require any external energy supply of electricity, compressed air, vacuum or hydraulics. .

30 Apparatet ifølge opfindelsen kan hensigtsmæssigt desuden være udformet således, at nævnte styreorganer for udtagerarmen udgøres af et kugleleje, der er lejret i oversiden af udtagerarmen, og som samvirker med en vandret del og en forreste nedadbuet del af 3 DK 173529 B1 nævnte styrespor af apparathuset, og af et kugleleje, der er lejret i en udskæring øverst i en gennemgående passage for udtagerarmen af en forreste del af apparathuset, og som samvirker med en retlinet (vandret) oversidedel af udtagerarmen, idet dennes underside er udformet som en tandstang, der indgriber med tandhjulsdrevet.The apparatus according to the invention may conveniently additionally be designed such that said guide means for the take-out arm are constituted by a ball bearing, which is mounted in the upper side of the take-off arm, which cooperates with a horizontal part and a front downwardly-shaped part of said control housing of said apparatus housing. and of a ball bearing mounted in a cutout at the top of a through passage for the dispensing arm of a front portion of the apparatus housing and cooperating with a rectilinear (horizontal) upper portion of the dispensing arm, the underside thereof being designed as a toothed bar engaging with the gear drive.

55

For at beskytte tandstængeme og tandhjulsdrevene imod chokvirkninger kan apparatet ifølge opfindelsen desuden med fordel være således udformet, at den lodrette tandstang er forbundet med den øverste, bevægelige konsolarm ved hjælp af en stagbolt, en bøsning og to fjedre.In addition, in order to protect the rack and pinion gears from shock effects, the apparatus according to the invention may advantageously be designed such that the vertical rack is connected to the upper movable bracket arm by means of a stud bolt, a bushing and two springs.

1010

Apparatet ifølge opfindelsen er fortrinsvis desuden udformet således, at gearingen mellem tandhjulsgear og -drev er 1,4 : 1, således at udtagerarmen med sikkerhed kan nå at bringe emnet ud af værktøjet, inden dette igen lukkes.Preferably, the apparatus according to the invention is furthermore designed such that the gearing between cogwheel gears and drives is 1.4: 1, so that the extractor arm can safely bring the workpiece out of the tool before it is closed again.

15 For at tillade den nævnte dykkende bevægelse af den frem- og tilbagegående udtagerarm kan det desuden være fordelagtigt, at apparatet ifølge opfindelsen er således udfoimet, at et mellemste tandhjul af nævnte tandhjulsgear og nævnte tandhjulsdrev, der indgriber med nævnte tandstang på undersiden af udtagerarmen, er lejret på en fælles aksel ved hjælp af en gaffel, der er understøttet på fjedre.In addition, to allow said diving movement of the reciprocating shaft arm, it may be advantageous that the apparatus of the invention is so arranged that an intermediate sprocket of said gear and said gear drive engaging with said rack on the underside of the shaft arm. is mounted on a common shaft by means of a fork supported on springs.

2020

Opfindelsen forklares i det følgende nærmere med henvisning til tegningen, på hvilken:-The invention will now be explained in more detail with reference to the drawings, in which: -

Fig. 1 viser et ovenbillede - delvis i snit - af en udførelsesform for et apparat ifølge opfindelsen, 25 fig. 2 viser et snitbillede af det i fig. 1 viste apparat ifølge opfindelsen jfr. snitlini-en II-II, fig. 3 viser et sidebillede - delvis i snit - af det i fig. 1 viste apparat ifølge opfindel-30 sen, fig. 4 viser et snitbillede af det i fig. 1 viste apparat jfr. snitlinien IV-IV, 4 DK 173529 B1 fig. 5 viser et perspektivisk billede af den i fig. I - 4 viste udførelsesform for et apparat ifølge opfindelsen - set bagfra, 5 fig. 6 viser et perspektivisk billede af den i fig. 1 - 4 viste udførelsesform for et apparat ifølge opfindelsen - set forfra, fig. 7 viser et perspektivisk billede af et bloksnitværktøj til en excenterpresse, 10 fig. 8 viser et perspektivisk billede af apparatet ifølge opfindelsen monteret i det i fig. 7 viste bloksnitværktøj - set bagfra, fig. 9 viser et perspektivisk billede af apparatet ifølge opfindelsen monteret i det i fig. 7 viste bloksnitværktøj - set forfra, 15 fig. 10 viser et plant billede af apparatet ifølge opfindelsen monteret i et bloksnitværktøj til en excenterpresse, og fig. 11 viser et sidebillede - delvis i snit - af apparatet ifølge opfindelsen monteret i 20 et bloksnitværktøj til en excenterpresse - set langs snitlinien XI-XI i fig. 10.FIG. 1 shows a top view - partly in section - of an embodiment of an apparatus according to the invention; FIG. 2 is a sectional view of the embodiment of FIG. 1 according to the invention, cf. section lines II-II, fig. 3 shows a side view - partly in section - of the one shown in FIG. 1 in accordance with the invention; FIG. 4 is a sectional view of the embodiment of FIG. 1, cf. section line IV-IV, 4 DK 173529 B1 fig. 5 shows a perspective view of the embodiment of FIG. I - 4 from the rear view of an apparatus according to the invention; 6 is a perspective view of the embodiment of FIG. 1 - 4 are a front view of an apparatus according to the invention, fig. 7 is a perspective view of a block cutter tool for an eccentric press; FIG. 8 is a perspective view of the apparatus of the invention mounted in the embodiment of FIG. 7 is a rear cross-sectional tool shown in FIG. 9 is a perspective view of the apparatus of the invention mounted in the embodiment of FIG. 7 is a front view of the block cut tool, FIG. 10 is a plan view of the apparatus of the invention mounted in a block cutter tool for an eccentric press; and FIG. 11 shows a side view - partly in section - of the apparatus according to the invention mounted in a block cutter tool for an eccentric press - viewed along section line XI-XI in FIG. 10th

Det viste emneudtagningsapparat 2 omfatter et todelt apparathus 6, der ved hjælp af en konsolarm 7 er indrettet til at fastgøres til en stationær værktøjsdel 5 af et stanseværktøj 4 (fig. 8), f.eks. et såkaldt bloksnitværktøj, hvor emnets ydre kontur samt eventuelle 25 huller og indvendige udskæringer udstanses samtidigt. En anden konsolarm 12 er fastgjort til den bevægelige værktøjsdel, dvs. at konsolarmen 12 bevæges op og ned sammen med den bevægelige værktøjsdel. Konsolarmen 12 er via en stagbolt 38, en bøsning 39 og fjedre 40 på støddæmpende måde forbundet med en lodret forskydelig tandstang 14 (fig. 2), der via et tandhjulsgear 16, et mellemtandhjul 41 og et tandhjuls-30 drev 18 er drivforbundet med en vandret forskydelig udtagerarm 8 med et sugekop-mundstykke 9, der er indrettet til at indføres i det åbne værktøj for successivt udtagning af emner 3.The blank removal apparatus 2 shown comprises a two-piece apparatus housing 6, which is arranged by means of a bracket arm 7 to be fixed to a stationary tool part 5 of a punching tool 4 (Fig. 8), e.g. a so-called block cut tool, in which the outer contour of the workpiece as well as any 25 holes and internal cuts are punched out simultaneously. Another bracket arm 12 is attached to the movable tool part, i. that the bracket arm 12 is moved up and down together with the movable tool part. The bracket arm 12 is connected via a rod bolt 38, a bushing 39 and springs 40 in a shock-damping manner to a vertically displaceable rack 14 (Fig. 2), which is driven via a pinion gear 16, an intermediate gear 41 and a pinion gear 18. horizontally displaceable dispenser arm 8 with a suction cup nozzle 9 adapted to be inserted into the open tool for successively removing blanks 3.

5 DK 173529 B15 DK 173529 B1

Udtageraimen 8 er monteret i en gennemgående passage 37 af en forreste del af apparathuset 6 på en sådan måde, at udtagerarmen 8 under den sidste del af indføringsbevægelsen i værktøjet har en dykkende bevægelse, idet et øvre kugleleje 22, der er lejret i over-5 siden af udtagerarmen 8 dels samvirker med en retlinet (vandret) vægdel 26 af passagen 37 og dels med en forreste nedad-buet vægdel 28 af passagen 37. Udtagerarmen 8 holdes anpresset mod oversiden af passagen 37 ved hjælp af tandhjulsdrevet 18, der indgriber med en tandstang 35 udformet i undersiden af udtagerarmen 8, og som anpresses fjedrende mod denne ved hjælp af en fjedergaffel 43 og trykfjedre 44 (fig. 4).The take-out shaft 8 is mounted in a through passage 37 of a front part of the apparatus housing 6 in such a way that the take-off arm 8 during the last part of the insertion movement of the tool has a diving movement, an upper ball bearing 22, which is mounted in the upper 5 the side of the take-out arm 8 partly cooperates with a rectilinear (horizontal) wall portion 26 of the passage 37 and partly with a front downwardly curved wall part 28 of the passage 37. The take-off arm 8 is held pressed against the upper side of the passage 37 by means of the pinion gear 18 which engages a rack 35 formed in the underside of the take-out arm 8 and which is resiliently pressed against it by means of a spring fork 43 and compression springs 44 (Fig. 4).

1010

Ovenpå den nedre konsolarm 7 er monteret en luftcylinder 20, hvis stempelstang 19 ved hjælp af et beslag 30 er forbundet med den øvre konsolarm 12, dvs. at luftcylinderen 20 er monteret parallelt med den lodrette tandstang 14. Det nedre hulrum under stemplet af luftcylinderen 20, hvori der, når stempelstangen 19 bevæges opad, dannes vakuum, er på 15 ikke vist måde forbundet med et vakuumkammer 32 udformet i en bageste del af apparathuset 6; medens det øvre hulrum over stemplet af luftcylinderen, hvori der, når stempelstangen 19 bevæges opad, dannes trykluft, er på ikke vist måde forbundet med et trykluftkammer 34 udformet i den bageste del af apparathuset 6, dvs. at vakuum akkumuleres i vakuumkammeret 32 og trykluft akkumuleres i trykluftkammeret 34.On top of the lower bracket arm 7 is mounted an air cylinder 20, whose piston rod 19 is connected by means of a bracket 30 to the upper bracket arm 12, ie. that the air cylinder 20 is mounted parallel to the vertical rack 14. The lower cavity below the piston of the air cylinder 20, in which as the piston rod 19 is moved upwards, forms a vacuum, 15 is not shown in a manner connected to a vacuum chamber 32 formed in a rear part of the the apparatus housing 6; while the upper cavity above the piston of the air cylinder, in which, when the piston rod 19 is moved upwards, compressed air is formed, is not shown in a manner connected to a compressed air chamber 34 formed in the rear part of the apparatus housing 6, ie. vacuum accumulating in vacuum chamber 32 and compressed air accumulating in compressed air chamber 34.

2020

Sugekopmundstykket 9 er på ikke vist måde forbundet med vakuumkammeret 32 via en øvre luftstyreventil 27, der er indrettet til at aktiveres (åbnes), når sugekopmundstykket 9 er indført i værktøjet for at hente et emne 3, og tilsvarende er sugekopmundstykket 9 forbundet med trykluftkammeret 34 via en nedre luftstyreventil, der er indrettet til at ak- 25 riveres (åbnes), når sugekopmundstykket 9 er ført ud af værktøjet for at aflevere et emne 3. Med andre ord er emneudtagningsapparatet ifølge opfindelsen selvforsynende, hvad angår såvel vakuum som trykluft ril drift af sugekopmundstykket 9.The suction cup nozzle 9 is in no way connected to the vacuum chamber 32 via an upper air control valve 27 arranged to actuate (open) when the suction cup nozzle 9 is inserted into the tool to retrieve a blank 3, and correspondingly the suction nozzle 9 is connected to the compressed air chamber 34. via a lower air control valve adapted to actuate (open) when the suction cup nozzle 9 is removed from the tool to deliver a workpiece 3. In other words, the workpiece withdrawal apparatus according to the invention is self-sufficient in both vacuum and compressed air for operation of the suction nozzle 9.

s 30s 30

Claims

An apparatus (2) for removing items (3) from a punching tool (4) in the punching machine, e.g. an ex center press, and comprising an apparatus housing (6) secured by means of a bracket arm (7) to a stationary lower part (5) of the punching tool (4) and comprising a reciprocating withdrawal arm (8) with suction cup nozzle (9) and associated drive mechanism (10), characterized in that a bracket arm (12) secured to a movable upper part of the punching tool (4) is driven by a vertically displaceable rack (14), preferably via a gear gear ( 16) and drive (18) are drive connected to the take-out arm (8), the bracket arm (12) is additionally driven to a piston rod (19) of an air cylinder (20) interposed between the respective bracket arms (7, 12). and supplying the suction cup nozzle (9) with both vacuum and compressed air, and the dispensing arm (8) comprising and / or cooperating with control means (22, 24) which cooperate with the control surfaces (26, 28) thus formed in the apparatus housing (6), the extractor arm (8) and thus the suction cup nozzle (9) at least below the the first part of the movement inwardly towards the workpiece (3) to be removed is moved inward / downward, and that the removal chamber (8) initially moves upwards / outwards when it is again moved out of the tool with the workpiece (3).

Apparatus (2) according to claim 1, characterized in that a lower end portion of said air cylinder (20) is attached to the bracket arm (7) and said piston rod (19) of said air cylinder (20) is connected to it. movable bracket arms (12) e.g. by means of an angle bracket (30), that the lower cavity of the air cylinder (20), in which, when the movable bracket arm (12) is moved upwards, a vacuum is created, connected to a vacuum chamber (32) formed in a rear part of and the upper cavity of the air cylinder (20), in which, when the bracket arm (12) is moved upwards, compressed air is created, 25 is connected to a compressed air chamber (34) formed in said rear part of the apparatus housing (6).

Apparatus (2) according to claims 1 and 2, characterized in that the suction cup nozzle (9) is connected to said vacuum chamber (32) via an air control valve (27) which is activated (opened) when the suction nozzle ( 9) is inside the tool for retrieving a workpiece (3) and the suction cup nozzle (9) is connected to said compressed air chamber (34) via an air control valve (29) actuated (opened) when the suction cup nozzle (9) is removed from the tool to deliver a blank (3).

Apparatus (2) according to claims 1-3, characterized in that said control means for the take-out arm (8) is constituted by a ball bearing (22) which is mounted in the upper side of the take-off arm (8) and which cooperates with a a horizontal portion (26) and a forward downwardly extending portion (28) of said guide grooves of the apparatus housing (6), and of a ball bearing (24) mounted in a cutout (36) at the top of a through passage (37) for the dispensing arm ( 8) of a front portion of the apparatus housing (6) and cooperating with a rectilinear (horizontal) upper side portion of the take-off arm 10 (8), the underside thereof being formed as a rack (35) engaging with the pinion gear (18).

Apparatus (2) according to claims 1-3, characterized in that the vertical rack (14) is connected to the upper movable bracket arm (12) by means of a stud bolt (38), a bushing (39) and two springs (40).

Apparatus (2) according to claims 1 - 3, characterized in that the gearing between gear gears (16) and drive (18) is 1.4: 1, so that the extractor arm (8) can safely reach the workpiece from the tool before closing it again. 20

6 DK 173529 B1

Apparatus (2) according to claims 1-4, characterized in that an intermediate gear (41) of said gear (16) and said gear (18) engaging with said gear (35) on the underside of the removal arm (8) , is mounted on a common shaft (42) by means of a fork (43) supported on springs (44) so as to permit the diving movement of the reciprocating reciprocating arm (8).