DE1527063A1 - Punch scraper - Google Patents

Description

H. SCHROETER ■ K. LEHMANN

• PATENTANWÄLTE 8 Munich 25. Lipowskystr. 10 Tel. 778956 _mw __ _wi-1Q

1.X2.1965

S. B. WHISTLER A SONS, INC., NEW YORK 14217 (USA)

Punch scraper

The invention relates to a Stempelabstreifer, in particular with a new bracket to hold the _stripper: in a use position in which it surrounds a punch same or DER] f.

The punch scraper according to the invention is designed and arranged so that it can be used with punches which are used for punching, perforating, notching, etc., the scraper scraping off the workpiece in a manner known per se.

$ 09-824 / 0190 bad original

The invention provides for the use of a scraper that a body made of an elastic material, for example Polyurethane and the like ", or a more common type of arrangement with compression springs.

Known wipers of this type can be used in various ways be arranged around a stamp. In some cases * the scraper is mechanically fixed with the aid of a clamping screw or the like. In some cases the stamp is included provided a circumferential groove, which is a suitable fastening means for fastening the wiper in its G-erauchsstteilung takes up .

According to the invention, a conventional stamp can be used and the The scraper can be quickly and easily installed in the position of use by sliding the scraper onto the temple and • is clamped onto it.

Bs is very much desired to create a stamp removal tool that can be easily moved into the position of use. This scraper but should also remain in its position of use. It is therefore desirable to provide an arrangement in which to Considerable force is required to remove the scraper.

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It is therefore important to create an arrangement in which the Bracket for the scraper regardless of the position of the Stamp generates a constant holding force. That is, while the entire movement of the punch on which the scraper is to be mounted, the same force to remove the scraper should be required.

Another important consideration is the fact that for Work of the type mentioned used stamps on their surface often covered with oil or grease or other lubricants are. The bracket should now be such that to remove the Stripper from its position of use always the same force is required regardless of whether the stamp is dry or covered on its outer surface with a lubricating substance of some kind.

In the arrangement according to the invention, a novel holder! which allows the scraper to be inserted easily and quickly to bring the position of use on a stamp by the ^ The scraper is simply pushed onto the punch. To remove considerable force is required of the stripper from the punch. However, the scraper can easily be done by hand can be removed by rotating the scraper relative to the punch and then pulling it downward from the punch.

The holder according to the invention generates a constant holding force, that of the position of the scraper on the punch and of the

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Presence of lubricants on the outer surface of the stamp 'pels is independent. . -. ..-. "·" .--. . ^: Λ

The bracket itself consists of a flat, one-piece Disc made of a relatively, stiff, elastic material. Piping. Disc is inside with several, angularly spaced from each other arranged, radially inwardly directed parts, whose "inner Elia en delimit a central opening" the smaller is than the stamp ', so that the stamp is fully absorbed and the Punch scraper in the position of use on the punch - is tensioned. The scraper is provided with means that allow bending of the inner region of the holder. So that the holder easily in its active or tensioned position can be moved. . -..-. ' . ; . ,

With this training, the holding force of the bracket can be applied beforehand. determined and modified by the fact that certain, critical Dimensions of the bracket are changed, so. that. the. Arranging. ·. tion. is very versatile. . . ; ' . ,

A particularly important economic advantage of the invention. consists in the fact that the device for holding the scraper extremely simple and cheap in its division of use so that it enables considerable cost savings, is at the same time high usability and very practical Arrangement guaranteed.

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It is an object of the invention to provide a punch wiper for stripping the workpiece from punches, for example serve for punching, perforating, notching and the like. .

A sub-object of the invention is to provide one Stamp scraper with a bracket for quick and easy Attaching the stripper on a stamp and for reliable Holding the scraper in the usage division is provided. ^

Another sub-task of the invention consists in creating a punch scraper with a holder that is independent of the position of the scraper on the punch essentially constant holding force is generated and when the A considerable force is required for the stripper from the punch. -.

There is also a Unteraufgäbe of the invention to provide a punch stripper ers with a support which exerts on the% stamp a substantially constant holding force is not affected by the presence of lubricants or the like on the surface of the dumbbell die.

A sub to the invention is also the creation of a punch stripper with a holder which is designed so that the holding force is predetermined and j tion of the dimensions of the bracket can be easily changed. "

909824 / OtSCf

Furthermore, there is a 'Unterauf were the invention is to provide a Stempelabstreifers, .the is characterized by a simple, inexpensive construction and is effective in use and reliable.

Embodiments of the invention are shown below Description explained with reference to the drawings. In these shows

Fig. 1 in a vertical section a punch scraper according to the invention before attaching it to a stamp,

Fig. 2 shows a section through an arrangement with a stamp and a die, wherein the punch stripper according to the invention is in its use position on the punch of the arrangement,

Fig. 3 shows a ScMaitt essentially along the line 3-3 of Fig. 1, seen in the direction of the arrow, "

Fig. 4- on a larger scale a section through the punch stripper according to the invention to explain the turning of the Holder in its use or clamping position,

Fig. 5 shows the position of the holder when removing the inventive Stamp scraper from the stamp,

909824 / Ot 90

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Fig. 6 in vertical section a modified embodiment of the invention and.

J ¹ Ig. 7 shows a section essentially along the line 7-7 of the .Pig.6, seen in the direction of the arrow.

Figures 1-5 show an embodiment of the invention.

A clamping plate 10 carries a punch chuck 12 with Hai te screws 14 are kept in their G-e "division of use.

Cylinders! F-fee 16 serve .in the usual way-to the correct curse- λ

ten of the punch chuck. ■ ".-- ■■■. |

In the usual punch receiving hole 21 of the punch chuck 12 a punch 20 is arranged. The top of the stamp lies on a hardened support plate 22. The stamp can be in the The punch chuck can be fastened in any suitable, conventional manner, not shown, for example with a clamping screw or the like that holds the punch in its position. -

The punch 20 has a generally cylindrical part 26 f and at the lower end in FIG. 2 a working part 28 (FIG. 2). _; The punch stripper 50 according to the invention can be mounted so that it surrounds the punch.

A clamping plate 32 is used to carry a die chuck 34-, fastened in the usual way with retaining screws 36 and with Dowel pins 38 is aligned. The die chuck 34 is

90982Λ / 0190

BATH

provided with the usual recess 42 in which a matrix A sleeve 40 is mounted. The holder for the stamp and the Die 1st is designed and arranged in the usual way and - ' does not form part of the present invention.:

The Stemrpelabstreifer 30 according to the invention has a relative rigid first end portion "50 and a relatively rigid second End part 52, as well as a., Elastic means 54, which between the opposite Eaitteile is arranged and acts on them; The body 54 made of elastic material can be made of a polyurethane plastic consist, generally ring-shaped and one cyl indr is without outer jacket eleven 1 surface and a continuous longitudinal bore , 56 own. ..-. ; - · ■ - .. '■ · .... .. ■■ .... "; .-.. -....--.

The end portion 50 is -ausgebiidet with a in Fig. 1 ^ na deepening 60, the lower part of the recess is surrounded by einemrWulst 62 bexi ^ d, et located in the. Er-recess extends inwardly, so that the '".'- ATA part of the eve elastisehen body. 54 _r snugly in the recess of the end part 50 is held and the end portion is positively connected with the body -54. The recess 60 has a substantially flat bottom 64, the "purpose" of which is described below.

■ '* ■' ■ ■■ .'-.-. ■ ■ '■ ■ ■ ■'.

909824 / 019Ö

The opposite set end portion 52 is middle; a recess 70 from ·. which is used to receive the lower end of the body 54. The upper part of the recess in FIG. 1 is surrounded ^{by a} bead 72 which extends radially inward and holds the end part 5. 2 in place on the lower end of the body 54. The end part 52 is also penetrated by a central hole 74. The bore 56 and the holes 66 and 74 are aligned and take in the Pig. 2 shown position of use of the scraper on a stamp. The two end parts 50 and 52 can be made of a relatively rigid material, for example mild steel. In this embodiment, the bracket is denoted by 80 and made, for example, of tempered Pederstahl, which has a thickness of about 0.127 mm. The holder thus consists of a relatively stiff but elastic material and has the shape of a one-piece, flat disc. This flat disk can rest against the flat bottom 64 of the recess 60, whereby the holder is normally held in a flat position, as shown in Figure 1.

In Pig. 3, the design of the holder 80 can be seen more clearly. The circumference of the bracket is generally less than the circumference of the inner wall 78 of the recess 60. The bracket is provided with several, here three, outwardly directed projections 82 which are arranged at equal angular distances from one another and engage the wall 78 so that the bracket is held properly centered in the recess. The bracket is in the recess 60 is preferably arranged in the oil seat.

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in its inner part is the bracket with several radial ones Slits 83 are formed which divide this inner area into several ring sectors 84, the inner ends 86 of which are circular Limit the opening that can accommodate the stamp appropriately. This central opening extending from the inner ends 86 of the Ring sectors 84 of the bracket is limited, has opposite the The stamp is slightly undersized so that it can fit snugly around the stamp.

In one example, the punch portion 26 has a diameter of 12.7 mm, the hole 66 in the end part 50 has a diameter of about 12.75 mm, the bore 56 of the elastic body 54 a Diameter of about 12.95 mm and the central opening formed in the holder for receiving the stamp has a diameter of about 12.62 mm.

When the stamp from stripper is moved into the position of use shown in Figures 2 and 4, in which the upper When the surface of the end part 50 rests against the lower surface of the punch chuck 12, the holder 80 takes the one shown in FIGS. 2 and 4 position shown, in which the inner ends of the ring sectors 84 of the bracket are bent downwards, which is made possible by the elastic material of the body 54. In the one shown in FIG Position grip the relatively sharp upper edges 80 * of the ring sectors 84 on the outer circumferential surface of the punch and keep the wiper in its division of use. If the The scraper is pulled downward from the punch moves

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the holder in the position shown in FIG. 5, in which it., is relatively flat. The flat bottom wall 64 of the Recess bending the inner parts of the bracket in either direction Fig * 2 and 4 opposite position ^ because then to «decrease the scraper would require a considerable amount of force.

FIGS. 6 and 7 show a modified embodiment of FIG Brfindung_ with a magnetic punch chuck 100 that is magnetic can be held on the platen. The punch 102 can with the aforementioned Stempel.20 im essential identisoh. The stamp is on one side with a suitable notch 103 is formed which receives a clamping screw 104 which is in a suitable opening of the punch chuck 100 is screwed and in a known manner the stamp in his Holds position of use in the punch chuck.

The scraper IiO has an intermediate piece 112. In this are Countersunk openings 115 formed in which retaining screws 114 are slidably arranged at their lower ends a Carry stripping plate 116. The shackles are common Surrounding coil springs 118, which press the stripper plate 116 downwards, who it has been moved upwards during a punching process so that it can then strip off the workpiece. The intermediate piece 112 and the stripping plate 116 are aligned Openings 120 and 122 penetrated, which the neighboring Pick up parts of the stamp.

90982 U / 0190

The intermediate piece 112 is in its upper surface with a ver, recess 130 "provided, which receives a bracket 152 ^ This Bracket also consists of a flat, one-piece disc made of a material similar to that described above Bracket 80 ″ Above bracket 132 is a flat retaining cup 134 arranged, the flat lower surface on the upper surface the bracket attacks. The retainer cap is held in place with flat head screws 136, the appropriate openings of parts 134 and Pass through 112 * The cap 134 has a central opening 138 for holding the stamp.

As is particularly evident from FIG. 6, the inner portion of the intermediate piece 112 is cut away or beveled at the top at 140 so that there is a downwardly tapering annular shoulder which communicates with the central portion of the recess 130 allows a downward bending of the inner part of the holder, so that it can move into the division of use shown in Fig. 6, which ^{is similar to the 1} described above and in which the inner parts of the holder are bent downward when the holder is in their position in use is stretched on a stamp *

The design of the holder 132 can be seen more clearly from FIG. 7. The outer uiafang of the bracket is essentially elliptical table and grips the inner wall of the essentially circular. shaped recess 130 at two diametrically opposite points. The holder is in the recess

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Intermediate piece arranged essentially in a sliding fit. Of the inner part of the bracket 132 is with a plurality of radial slots 144 which divides this inner part into several ring sectors

_v 146 parts, the inner ends of which 148 have a central, circular ^

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Limit opening for receiving a stamp. As in the previous embodiment, the central opening of the bracket compared to the stamp a slight undersize, so that in use position of the punch scraper the punch firmly in the Bracket is clamped. ..'.- ■

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In both embodiments, the inner part of the holder a higher elasticity due to the radial slots provided therein, so that this inner part becomes that shown in the drawings Use position can be bent. ! Also recognizes one that both embodiments are similar to new and lead to beneficial results.

From the foregoing description it can be seen that the invention a new type of punch scraper for stripping the workpiece of stamps for punching, perforating, notching and the like creates. According to the invention a holder is provided which has a quick and easy attachment of the scraper to the punch permitted and a reliable pest holding of the scraper in Operation guaranteed. The holder according to the invention produces a regardless of the position of the scraper on the punch essentially constant holding force, and the scraper can

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90982470! 90

can only be removed from the stamp with considerable force Holding force of the holder provided according to the invention is due to the presence of lubricants and the like the outer circumferential surface of the punch is not significantly impaired.

• does. The holding force of the bracket can easily be changed, by changing the size of the central opening of the Bracket or by increasing or decreasing the thickness the bracket. You can make small changes to the dimensions the bracket can significantly change the value of the holding force exerted by the bracket. In one embodiment, in which the stamp and the opening provided in the holder have the diameter values given above, and the thickness the bracket is approximately 0.127 mm, a force of 14-18 kg required. The device according to the invention is shown in Simple and cheap in construction and effective and in use Reliable"

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Claims (1)

Λ ' .1 - ■; ■ - ■. \ » Claimsϊ - - ■ -. · _Ν . 1 * punch scraper comprising a relatively rigid first end-y part and a relatively rigid second end part, which is at the 'distance, from the first end part isrfc, each of these end- ■ -. parts of a p- central, opening is penetrated, which can receive a part ι of a stamp,., z "wi" see the first and the 'second end part arranged and on' the seh ^ end parts attacking,; elastic means that limit a central free Raiun ¹ to take up a S ^ stamp., -and a: bracket, -the one of the end | ^: share neighboring type is <t ·. and serves "to hold the scraper firmly on a punch," the holder consisting of a relatively stiff, elastic material and an "oil", relatively flat disc which has a central opening for snugly receiving an associated punch. 2, punch scraper comprising a relatively rigid first end portion and a relatively rigid second end portion spaced apart from the first end portion, each of these end portions is penetrated by an opening which can receive a stamp, arranged between the end parts and on them engaging elastic means that delimit a central free space for receiving a stamp, and a holder that is carried in the area of one of the end parts and serves to hold the scraper on a punch, the holder consists of a relatively stiff, elastic material and has a single-piece washer and the inner area the bracket several parts arranged at a distance from one another 909824/0190 BAD GR) QiNAL comprises, the inner surfaces of which are spaced apart from one another ^{1 ;} and delimit a central opening for a full acceptance of a punch. 5 «punch scraper according to claim 2, in which the spaced apart parts of the inner area consist of several, Radially inwardly directed parts exist, which are angularly spaced are arranged from each other and have a higher flexibility and higher elasticity than those arranged radially further outwards Parts of the bracket, 4 ·· Stamp stripper, comprising a relatively rigid first end part and a relatively rigid second end portion spaced from the first end portion between those end portions arranged, elastic means, which are compressed • and then die'Endteile up to their original distance can reset ·, and between the first and the second End part arranged and acting on these end parts, elastic Means and a holder that · in the area of one of the End parts is worn and serves to put the scraper on a To hold the stamp, the holder from a relative rigid, elastic material and an essentially has flat, one-piece disc, the inner area of which has several parts "arranged at a distance from one another," the one central opening for a full acceptance of a stamp limit / and means that in the position of use of the holder on a stipple a turning of the at a distance from each other 9 09824/0190 J ^ - - \ "■ j: ■■■■. '■ arranged parts of the inner area of the bracket in a Allow clamping division. 5β punch scraper comprising a relatively rigid first end portion and a relatively rigid second end portion spaced from the first end portion, each of these end portions being penetrated by an opening capable of receiving a punch, disposed between and engaging the end portions elastic means delimiting a central free space for receiving a stamp, a holder engaging on one of the end parts A , made of a relatively rigid but elastic material and having a flat, one-piece disc, the inner region of the holder several at intervals comprises spaced apart, radially inwardly directed cables, the inner surfaces of which define a central opening for snugly receiving a punch, and the inner ends of these spaced-apart portions extending substantially perpendicular to their adjacent planar portions of the support, and means which a Turning the inner Allow parts of the parts arranged at a distance from one another in a use or ο holding position on a stamp. 6. Combination of a stamp with a stamp wiper, whereby the punch scraper has a relatively rigid first end portion and one spaced from the first end portion, relative has rigid second end part, as well as arranged between the first and the second end part and engaging this end part, elastic means that a central free tree to the 908824/0100 BATH ORIGINAL Support of the stamp "limit * each of these end parts is durohsetzt by a loon» which serves to accommodate the stamp, and there is a distance between the outer surface of the stamp and the · adjacent end parts, a · bracket carried in the area of one of the end parts, which consists of relatively stiff, elastic material, has a flat, one-piece disc and the inner region of which has a plurality of angularly spaced, radially inwardly directed parts, the inner ends of which delimit a central opening which is smaller than the associated part of the punch, so that this opening takes up the ™ punch and the punch scraper is held in the position of use on the punch, in which the punch scraper surrounds the punch at a distance and only engages the holder on the punch and holds the punch scraper in the use division. 7 · Arrangement according to claim 6, comprising means that a turning the inner ends of the spaced apart Allow parts of the inner area of the holder in a use or engagement position on the punch. 8 · An arrangement according to claim 7, in which the one end portion with a recess is formed which has a flat bottom surface on which the holder rests. 909824 / 0t90 bad original ^? - 19 - ^f ** - *. / y vy 9 * Stemj0lal3streifer, comprising a relatively rigid first end ' part and a relatively rigid second band part, which is arranged at a distance from the first end part, between these end parts arranged, elastic means, which a body aUe elastic Have material, each of these end portions having a recess isur Receiving an enäes of the body is formed between the body made of elastic material and one of the end parts in the recess a holder is arranged from a relatively stiff but elastic material and a has flat, one-piece disk, the inner region of the holder has a plurality of angularly spaced apart, radially has inwardly directed parts, the inner ends of which have a central opening for fully accommodating a separate punch delimit and the opposite end portions and the body of resilient material of aligned holes for receiving a stamp are interspersed. 10 · punch scraper according to claim 9, in which the recess in the one end part has a flat bottom wall on which the flat Bracket rests. . 11 · Punch scraper, comprising a relatively rigid first end part and a relatively _t -rigid second end part, which is arranged at a distance from the first end part, elastic means arranged between these end parts, which have compression spring means, means for limiting the movement of the end parts from one another away, with each of the end portions and leather means having an open "909824 / 019ö ^ ■ ■ ■ · ■■■ V -: -./■ . limit rich to accommodate an assigned stamp, one, ■ the end parts is formed with a recess in ^ the one Bracket is arranged made of a relatively stiff, but consists of elastic material and has a flat, one-piece disc, and the inner region of which has a plurality of spaced apart ropes, which have a central opening to Limit reception of an associated stamp, and means for clamping the holder in the position of use. * 12. Stempelabs treif he according to claim 11, .in which the one part in the Area of the bracket has a cut away part that in the use or tensioned position of the bracket on a Stamp a bending of the inner ends of the spaced apart arranged ropes of the inner area of the bracket allowed 13. Punch scraper comprising a relatively rigid first end portion and a relatively rigid second end portion spaced k from the first end portion between the end portions arranged and acting on them elastic means, wherein each of these end parts and the elastic means have an associated one Can accommodate stamp, one of the end parts is formed with a recess in which a holder is arranged, which consists of a relatively stiff but elastic material and has a flat, one-piece disc, the inner region of which has several parts arranged in tears from one another, the inner ends of which have a central opening for would take a stamp "limit, with the bracket on the wall the deepening has attacking parts of the fear and has provided means showing a turn of the inner ends' of the spaced MU in the G-ebrauohsatellung of the Allow mounting on a stamp. 14 ·. Steinpe labstreif he according to claim 13, in which the holder several has outwardly directed projections that are spaced apart from one another and engage the wall of the recess, 15. Steiupelabstreif he according to Anspruoh 13 »in which the outer circumference of the. Bracket is essentially elliptical and engages at points of the wall of the recess which are arranged at a distance from one another. '© AD OFUGINAI- 909824/0190