CN1212904C

CN1212904C - Rotary punching apparatus and method for punching slotted holes in a continuously moving strip

Info

Publication number: CN1212904C
Application number: CN 00802575
Authority: CN
Inventors: 迈克尔·萨里纳
Original assignee: Formtek Inc
Current assignee: Formtek Inc
Priority date: 1996-09-04
Filing date: 2000-10-30
Publication date: 2005-08-03
Anticipated expiration: 2020-10-30
Also published as: CN1335793A

Abstract

A rotary punching apparatus (10) for punching a hole (14) having a predetermined length along a longitudinal axis of a strip material in a moving workpiece (W) of strip material, the apparatus having a pair of die assemblies (60, 62) disposed on opposite sides of the workpiece (W) of strip material and a drive means (54) for the rotating assemblies, a front punch (84) mounted on one of the assemblies for substantially radial movement to punch a die hole in the strip material and a cooperating die recess in the other assembly; a rear punch (88) adjacent the main punch (84) is used to punch the strip at a point adjacent the punched die hole, punching a second die hole in the strip, the first die hole and the rear die hole together forming a long hole (14) of a predetermined length along the strip. A rotary punching method using the above apparatus is also disclosed.

Description

Rotary punching apparatus reaches the method for punching press slotted hole on the band that moves continuously

Technical field

The present invention relates to rotary punching apparatus, it is used for particularly going out the hole with remarkable length along the longitudinal axis of mobile band in the band punching of moving.

Background technology

For many years come drilling by die-cut mobile band always.In many situations, promptly short if the hole is less relatively along the longitudinal axis of mobile band, so just can adopt simple rotary die satisfactorily.But, if the hole is longer, that is, have significant length along mobile band, so just can not adopt simple rotary die, that is, be contained in the mould on going barrel or the roller.In this case, adopted the so-called mould (flying die) that flies in the industry.They are mounted in the mould on the balladeur train that can move along rectilinear orbit.Balladeur train can move on straight line along the longitudinal axis intermittent reciprocating ground of the band in moving.Balladeur train quickens from resting position, reaches the linear velocity of mobile band.Balladeur train moves towards each other at this moment, and close die on band is portalled thereby go out or penetrate when mould just vertically moves with band.Then, mould is opened, and balladeur train is retracted the starting position along track.This system requirements uses relatively expensive equipment, the control of balladeur train needs complicated Computer Control Unit, reach the speed that is complementary with mobile window of web velocities so that guarantee balladeur train, and guarantee mould strictly in the orthochronous closure, thus drilling on the accurate point of needs.Another even more serious problem is, balladeur train stop and reverse, and then once make its acceleration for next hole, need a measurable time span.In this time course, can not drilling on band.If the design of strip product has at interval hole closely, so, solution be exactly following both one of:

1. the necessary reduction of speed of band makes its speed must be enough to slowly make the mould balladeur train return its starting position if having time, begins it then and quickens next time, perhaps

2. production line needs the two or more mould balladeur trains that fly of body plan, and ground, front and back is installed and sequentially worked.

Wherein any solution all is expensive and unacceptable actually.The band reduction of speed can reduce the output of per tour, thereby increases production cost.The cost height that two or more fly the mould balladeur train is installed, and is needed more complex control apparatus to guarantee that the hole is on the tram of mobile band.

Metallic plate industry especially needs the relative closeer strip product of the spacing in production hole, and these holes have significant length along longitudinal axis of the web.For example, a kind of metal plate and belt section product of extensive use is so-called clear water wall column (dry wall stud).This is a kind of c-shaped substantially groove, is made by metal plates and strips, is used for erectting wall and partition wall in various offices, commercial and industrial building, by being inner partition wall.The market competitiveness of especially this product is very high, and manufacturer is seeking to reduce its cost always, the method for the share of maintaining market.This clear water wall column is to be shaped on relatively large or long hole closely at interval.These holes are used for making under construction pipeline, electric or other service facility to pass along the inside of wall.

An example of the typical products that this just can make with chain mobile band, countless other products can be with this mobile band manufacturing.Band can be metal or nonmetallic.Final products can be the strip product that has the hole, and perhaps, in other situation, final products can be the band parts that is die-cut into from band.

Summary of the invention

Obviously need a kind of punching press or punching apparatus, this equipment can go out relatively large or long hole and unlikely generation the problems referred to above relevant with mobile balladeur train with flying mould in mobile band upper punch always.This equipment is preferably based on going barrel or roller, installation mold thereon, thereby interval that can be as required and the tightness degree that needs go out or drilling, be called " punching " in this manual, unlikely reduction speed of production or cause extra-pay.Better simply relatively control device can be used to guarantee rotary die, that is, the mould of roller carrying according to the move into timing relationship work of band along production line, and guarantee that roller is inoperative when not needing the hole, band can be between roller by and not by punching.Have and be called slotted hole in this manual along the hole of " significantly " length of band axis and no matter they are circular, rectangle or any other shape." slotted hole " also comprises material or the member that washes out from band.

In order to realize aforementioned purpose, the invention provides a kind of rotary punching device, it is used in the web workpiece punching of moving, and described hole has the remarkable length along longitudinal axis of the web, and this equipment has the pair of rolls in the relative both sides in the path of web workpiece; Power set with the described roller that rotates, and at least one front mold that is installed on one of described roller is arranged, and telecontrol equipment, be used for substantially outwards moving described mould with respect to described roller, go out the front mold hole so that pass described band, described front mold hole limits band part behind a leading edge and, the front mold recess that a cooperation is arranged in another of described roller, also has second mould adjacent with above-mentioned first mould, described second mould is provided with to such an extent that engage on a point adjacent with the band rear portion of leading die hole and punched web, thereby in described band, go out the extendible portion of described leading die hole, thereby described first die hole limits a continuous hole, it has the remarkable length along the described longitudinal axis of described band, and limits a trailing edge away from described leading edge.

In the present invention, an intermediate mold is preferably between leading edge and the trailing edge and is fixed on the described roller, and it is not outwards moved, and is used for by this way continuing and the leading die hole of extension.

In a particularly advantageous embodiment of the present invention, be provided with the back mould of an activity, so that the described band of punching press, form the trailing edge in described hole.

The present invention also is provided with at least one punching die, and it can outwards move with respect to described roller, is used for going out another hole at band, comes along longitudinal axis of the web and the described slotted hole axially spaced-apart of being gone out by master, back mould in this hole.

The present invention preferably is provided with the powered control system that is used to rotate described roller, and this powered control system can be worked off and on.So that along the longitudinal pitch punching of band axis with needs, when the position that does not need the hole, described roller is inoperative, so as to make band between roller by and not by punching.But powered control system can be an intermittently used motor, perhaps can comprise a clutch; Thereby motor can turn round continuously, and when needs clutch work so that provide rotary power to roller.

In the present invention, roller can must extend on the whole width of band in body plan, and is installed in rotation on the bearing in the band both sides.

In a preferred embodiment, axle is installed on the single bearing with cantilevered fashion, and this bearing only is arranged on a side of band, and the length of roller is enough to partly cross band, and the axis that needs along band is provided with mould.

The invention provides mould manipulation device such as cam gear.Front mold is installed on the supporting member, and this supporting member stretches in the roller, and terminates in the follower, and this follower is provided with to such an extent that engaged by cam gear.Installing in a similar fashion of rear portion with punching die, and engaged by cam gear.

In the present invention, the mould recess is set on another roller, these mould recesses with its separately mould and the receiving portion that needs punching of band aim at.Preferably be provided with and pound out device, so that pound out the band part of punching from recess.

Description of drawings

In claims, each novel feature of the present invention has been described more specifically as the part of present disclosure.In order to understand the present invention, advantage of the present invention and concrete purpose thereof better, should consult the detailed description of accompanying drawing reading to each preferred embodiment of the present invention.

Fig. 1 be of the present invention in the workpiece that moves the overall stereogram of the rotation punching apparatus of punching, and be represented by dotted lines band in device downstream punching;

Fig. 2 is the cutaway view along 2-2 line among Fig. 1;

Fig. 3 is the top plan view of a web workpiece part, is illustrated in short hole and the slotted hole gone out on it;

Fig. 4 is the stereogram of finished product, is the structural steel that is used to support dry wall etc. in this example;

Fig. 5 is the stereogram of punch die;

Fig. 6 is the stereogram of another punch die;

Fig. 7 is the stereogram of the center die of fixing;

Fig. 8 is the stereogram of back punch die;

Fig. 9 is the schematic diagram corresponding to Fig. 4 and Fig. 5, is illustrated on the 4th position of rotation of equipment and goes out short hole separately by punching die;

Figure 10, other position in short hole is gone out in 11 and 12 expressions;

Figure 13 is the schematic diagram corresponding to Fig. 3, is illustrated on the preceding position of rotation of equipment and goes out slotted hole by front mold; And

Figure 14, other position of slotted hole is gone out in 15,16,17 and 18 expressions.

The specific embodiment

At first consult Fig. 1 now, the figure shows collectivity mark and be 10 rotary punching apparatus of the present invention, web workpiece W shifts to downstream position from upstream position continuously.This band can be one section metal band, generally opens around forming, by the known device (not shown) supporting that is positioned at the upstream of this specialty from coiled material.Band can be made the shape of any needs usually by this professional known roller shaping dies.In this concrete example, the roller shaping dies is positioned at the downstream of equipment 10, but this is not a prerequisite of the present invention.In the situation of many plate products, if necessary, equipment 10 can easily be contained in the downstream of roller die tool.

On the position of equipment 10, band can be a continuous strip, is cut into suitable length in the somewhere, downstream by suitable cut-out die device.

But, in a kind of situation of recommendation, cut off die device (in the upstream or downstream) and be adjacent to rotary punching apparatus 10 (this cut-outs die device does not draw) is set, before and after punching in the following manner, make in the smooth situation of band maintenance and can be cut into suitable length.

In this case, band is cut off when still keeping smooth, and in the present embodiment, each section band forms suitable shape in roller die tool (not shown).Obviously also the roller die tool can be set not in other embodiments.For example, final products also can be the parts that cuts out from band, and perhaps, the final products of band itself are exactly flat.

The present invention in conjunction with short hole 12 and the punching out in long hole 14 be described.In described specific product, long and short hole is arranged in pairs.In this case, just in order to describe, the diagram product is finally made the clear water wall column of sheet metal.This clear water wall column itself is known.Their common cross sections are rectangular C shape, dig flange along the both sides of edges of post.According to the practice in the industry, this post needs along the longitudinal axis of post short hole 12 and slotted hole 14 spaced apart, shown in Fig. 3 and 4.These holes are used to make pipeline and electrical service facility edge to pass through within the walls, and this is that industry is known.

Short hole 12 is generally circular hole, only with a punch die punching out.Slotted hole 14 has significant length along longitudinal axis of the web.These slotted holes have caused the problems referred to above just, and the present invention is particularly in order to rotate at a high speed punching out this hole with remarkable length.Advantageously, the present invention can be on same equipment short hole of punching out and slotted hole continuously in the following manner with remarkable length.

But, in some cases may by more traditional equipment independent roller on the short hole of punching out.

Obviously, usually in rotary punching apparatus 10 downstreams, in above-mentioned illustrated example, in roller former R, longitudinally bend to C shape groove (Fig. 4).The formation of this rectangular longitudinally C shape bending is to use this professional known conventional roll shaping dies to carry out, and need not to be described and to illustrate.

This specific situation is described in the method for making the clear water wall column though The present invention be directed to,, the present invention obviously has widely and uses.The present invention can be applied in need be on accurate longitudinal separation, the occasion of punching on the band that moves.Perhaps, the present invention also can be applicable to and need go out the workpiece situation partly of given shape from the band that moves.In this case, the part of going out is final products.

Band generally is a sheet metal strip, but in other situation also can be various needs by this way with at a high speed, high accuracy is from mobile band punching or stamp out other material.

Consult Fig. 1 now once more, as shown in the figure, equipment 10 comprises a base 20, and it can be used as the part of tinuous production, but is to describe separately here for illustrative purposes.Machine body 22 is installed on the base 20.Body 22 is whole solid metal block in the present embodiment.Body 22 defines the basic upright sidepiece of a bottom installing plate 24,26, a bottom cantilevered lateral support portion 28 and a top cantilevered lateral support portion 30.

Between

support

28 and 30, define one and be microscler space 32 substantially.Band W stretches into this space 32, and band can be moved between bottom and

upper support portion

28 and 30 in the following manner continuously.

As mentioned above, installing plate 24, sidepiece 26, lower support portion 28 and upper support portion 30 all are made of solid metal block in the present embodiment.

Bottom and upper roll driving shaft 38 and 40 are housed in the suitable hole 34 and 36 in bottom and upper support portion 28 and 30.Turn round in the suitable inner bearing (not shown) of roller driving shaft 38 and 40 in being contained in bottom and upper support portion free end, the outer bearing (not shown).

Two axles 38 and 40 stretch out by sidepiece 26, are connected with 52 with upper gear 50 by the bottom of engagement, so that oppositely rotation together.

Comprise that a power train of motor 54 and clutch or arrestment mechanism 56 is connected in the axle 40 on top in this example, motor or arrestment mechanism just illustrate with frame, and this is because they are known substantially in this specialty, need not to specify.Suitable clip (58) with gear 50 and 52 be bonded in separately the axle 38 and 40 on.

On the cantilevered end away from sidepiece 26 of axle 38 and 40, the end of axle is protruding with respect to bottom and upper support portion 28 and 30.Bottom and top

rotary die assembly

60 and 62 are housed on the free end of bottom and upper axis.

Bottom and top

rotary die assembly

60 and 62 are bonded on the free end of axle 38 and 40 by this professional known appropriate device respectively.Outside

rotary die assembly

60 and 62, be provided with bottom and top

jaw support plate

64 and 66, be separately fixed on the outer end of bottom and

upper body

28 and 30.

Consult Fig. 2 and 9 now to (18), as shown in the figure, in this illustrated embodiment,, be provided with at two groups of four diels on the top rotary die assembly 62 and two groups of two mould recesses on bottom rotary die assembly 60 though do not limit.

From the schematic diagram of Fig. 3 and 4 as can be seen, in this specific embodiment, band W is shaped on short circular hole 12 and long slotted hole 14, and slotted hole 14 is positioned at the downstream with respect to circular hole 12.Therefore, when band from left to right (Fig. 1) by the time, circular hole 12 is at first made, slotted hole 14 is made then.The order in hole can easily reverse, and above-mentioned explanation is just in order to be described.

In order to go out the hole 12 that is shorter than hole 14 in this example, the circumference spaced radial that centers on upper die assembly 62 is provided with punching die 70 with coming.Punching die 70 is contained in the hole substantially radially 72 in the upper die assembly 62 slidably, usually by inwardly compressing of spring assembly 74 (Fig. 9).

Fig. 5 represents punching die 70 individually.It comprises a rectangular substantially die ontology, has a cutting die boss 78, and its shape can cut out a hole from band, is circular hole 12 in this example.

Be provided with a spring recess (80) and be provided with a cam following profile 82 in the end opposite of die ontology in die ontology 76, its purposes will be described below.

Slotted hole 14 on the band is that the preceding punch die 84 by activity, fixing center die 86 and movable back punch die 88 are gone out.Punch die 84,86,88 all are installed in the top rotary die assembly 62.

Consult the position progress of Fig. 9 to (18) description upper and lower die

assembly

62 and 60 now, band moves from left to right in the drawings, and this is just in order to give an example and to illustrate.

Movable preceding punch die 84 is installed in top rotary die assembly 62 in substantially radially the cavity 90, can outwards move, usually by the inside bias voltage of suitable mold spring assembly (not shown).In general this die springs is known in this specialty, though use in this concrete occasion, it is believed that being applied in all is unique in the rotary die assembly.

Cavity 90 is not to be defined as radially.The axis of cavity is with respect to the angle of about one 5 ° of the true radius biasings of upper die assembly, thereby a kind of more rapid, complete punching press action is provided in the following manner.

Center die 86 is that the preceding punch die 84 of the activity of being adjacent to is installed in the fixing die ontology in the rotary die assembly of top.

Movable back punch die 88 is the movable punch dies in the cavity that is installed in upper die assembly 62 substantially radially, can outwards move, usually by the inside bias voltage of this professional known suitable mold spring assembly (not shown).

As shown in the figure, upper die assembly 62 itself limits a circle or columnar inner fovea part 92, and upper die assembly 62 limits two and half fan-shaped

mould part

62a and 62b, and it has a ringwise substantially periphery.

As shown in the figure, lower mould assembly 60 comprises similar shape,, limits a circle or columnar inner fovea part 94 that is, and outer shape is limited by two half fan-shaped

mould part

60a and 60b that have ringwise substantially periphery respectively.

Before, middle part and back punch die 84,86 and 88 together cooperating go out slotted hole 14 among the band W (Fig. 3).Hole 14 limits leading edge 14a, the lateral margin 14b of a basic straight line and the trailing edge 14c that is substantially triangular in shape.The effect of preceding punch die 84 is the leading edge 14a that go out straight line, begins to go out the lateral margin 14b of two straight lines.

The effect of center die 86 is the lateral margin 14b that continue to go out two straight lines.

The effect of back punch die 88 is two trailing edge 14c that are substantially triangular in shape that go out the slotted hole rear portion.

Movable forward and backward punch die 84 and 88 is gone out the slotted hole of example shape as shown in FIG. 3 with the combination of center die 86, has repeatability and high precision.Certainly, the accurate shape of slotted hole is by the contour limit of punch die itself, depends on the shape in hole to be gone out, perhaps, depend on the band part that need separate from band itself shape can great changes have taken place.

With

mould

70, and 84,86 and 88 cooperatings, the first complementary die recess 100 and the second complementary die recess 102 in lower mould assembly 60, be provided with.The first complementary die recess 100 has shape and the arc corresponding to punching die 70.Recess 102 has the scope of the punch die of being equal to 84,86 and 88.Be provided with in each

recess

100 and 102 and pound out

plate

104 and 106, they are for example fixed by pin 108 and 110.The inner surface of pounding out

plate

104 and 106 forms cam contour 112.

Preceding punch die 84 is illustrated in Fig. 6 and 8 respectively independently substantially according to forming with punching die 70 similar modes.

For the purpose of simplifying, use with Fig. 5 in identical label.

As shown in the figure, back punch die 88 comprises die ontology 76b, mould boss 78b and spring recess 80b.

Forward and backward punch die 84 and 88 is held within it and is

limited cam contour

120 and 121.

Center die 86 is illustrated among Fig. 7 separately in more detail.

As shown in the figure, that center die comprises is a plurality of, be 3 die ontologies 114 in this example, and each die ontology limits a central through hole 116, so as to installation in position.

Body 114 limits die-cut surface 122 and 123.Surface 122 forms big obtuse angle with surface 123, and so that a blanking action gradually to be provided, its mode will be described below.

Center die 86 between punch die 84 and 88 is fixed, thereby does not have cam contour.

Be provided with a cam gear in the cylindrical recess 94 of lower mould assembly 60, in this example, this cam gear comprises a roller 124.Roller 124 is rotatably supported on the lower cam support plate 64.

Be provided with the cam gear of roller 130 forms in the recess 92 of upper die assembly 62, it is installed in rotation on the top jaw support plate 66, and by backing

roll

134 and 136 supportings.

Because the bottom can be rotated by relevant separately axle with 62 with upper die assembly 60, lower mould assembly 60 rotates (Fig. 2) in the clockwise direction, and upper die assembly 62 rotates (Fig. 2) in the counterclockwise direction.

Obviously, mention clockwise and be not a kind of qualification counterclockwise, and just describe by accompanying drawing.Two rollers oppositely rotate together, this from figure obviously as can be seen.They also can rotate together according to other direction.

When two die assemblies rotate a half of a complete circle, they move past Fig. 9 gradually to each die location shown in Figure 180.

In Fig. 9 to 12, punching die 70 is punching on band W just.The inboard cam contour of mould 70 is just in engagement roller, so that force mould 70 to be passed down through band W.On this position, (in lower component 62) mould recess 100 is aimed at mould 70, and the part that will admit the hole 12 from the band to go out.

Fig. 9,10,11 and 12 expression punching dies 70 and relevant mould recess 100 thereof respectively make progress the position.

When punching die 70 when recall in the hole of having gone out band, bottom and

upper die assembly

60 and 62 will continue to go to position shown in Figure 13 to 18.

In Figure 13, preceding punch die 84 is just engaging band W, the positive engages male supporting-point roller 130 of its cam contour.The position of lower mould assembly 60 makes its recess 102 aim at punch die 84.

On the position of Figure 15, center die 86 is just engaging band W at the rear portion in the hole of the leading edge 14a in hole, and lower mould assembly 60 has rotated and the middle body of recess 102 is aimed at punch die 86, and punching press lateral margin (14b) part.

On the position of Figure 16, back punch die 88 is just engaging band, and mould cam contour 121 positive engagement roller 130, thereby punch die punched web are gone out the remainder of lateral margin 14b and the trailing edge 14c in hole 14.

Lower component 60 has also been rotated the arc distance corresponding to the top assembly, and in this case, back the rectifying with back punch die 88 of recess 102 aimed at.

When four moulds have carried out its operation on band,

assembly

60 and 62 will rotate, and until

cambered surface

60b, 62b is on the opposite flank of band.On this position, mould will not worked.Pound out

plate

104 and 106 for two and also incite somebody to action engagement roller 124 one after the other, so that release the band part of washing out by mould.

Then, clutch or brake 56 work so that stop further rotation, thereby make band continue to reserve a part that does not have the hole by between the assembly on band.

When once more need be on band during punching, clutch or brake work so that engage motor 54 and driving shaft and bottom and upper die assembly again, thereby be brought into play above-mentioned function.

As can be seen, two groups of moulds are arranged on the two opposite sides of upper die assembly 62 in the illustrated embodiment, two groups of holes are arranged on the two opposite sides of lower mould assembly 60.Therefore, need go out the arc scope of practical operation of each die assembly of short hole and slotted hole, be about about 90 ° only, and the upper and lower assembly will be in dormant state on about 90 ° arc scope, start once more until them.

Therefore, entire equipment can promptly begin and stop, even when the band high-speed mobile, also can on band, go out short hole and slotted hole, can change to some extent from a kind of product to another kind of product in groups short hole and the spacing between the slotted hole, to satisfy user's needs.

Certainly, the work timing of roller also depends on factors such as the spacing that needs between the diameter of for example band translational speed, bottom and upper die assembly and hole and changes.

Obviously, in some cases, only need a kind of such hole, in this case, can be simply from the roller one of removal or some moulds.

By pulling down die assembly simply, and change the change that just can easily realize the shape in hole with other die assembly.

For example, by any suitable band sensing mechanism as being contained in the measurement mechanism in the equipment 10 usually, whole operation that can control appliance.Unillustrated sensing device can be connected in suitable computer console 140.Computer console then is connected in motor 54 or clutch/brake 56, and this depends on the ongoing working method of equipment.

The application of the invention finds, can high-speed mobile, extensively variable thickness, punching from the band of the thinnest compliant metal (metal gauge) until minimum (12), and do not cause equipment to be subjected to excessive stress.

Though in this embodiment of the present invention, the layout of bottom and upper die assembly is installed as illustrated cantilevered fashion, but if necessary, this bottom and upper die assembly also can be installed in rotation between the die supports and mold on the band two opposite sides.

The installation of this die assembly in the bearing on the band two opposite sides and layout need not any special description.

Above the description of preferred embodiment of the present invention is just carried out for example.The present invention is not limited to any above-mentioned concrete feature, but is included in the various modifications and variations in claims scope.

Claims

1. a rotary punching apparatus (10) is used for going up punching press slotted hole (14) at the web workpiece (W) that moves, and described slotted hole (14) has along the predetermined length of the longitudinal axis of described web workpiece (W), it is characterized in that:

Two die assemblies (60,62) are arranged on the two opposite sides, path of described web workpiece (W), and power set (54) are used to rotate described assembly (60,62);

A preceding punch die (84) is installed in described assembly (60,62) on the described assembly (62) in, telecontrol equipment is used for substantially outwards moving described preceding punch die (84) with respect to a described assembly (62), so that go out the first mould part hole on described web workpiece (W), described preceding punch die (84) limits a leading edge opening (14a) of described slotted hole;

Punch die after one (88) is arranged on the described assembly (62) adjacent to punch die before described, described back punch die (88) is used for engaging selectively and the described web workpiece of punching press (W), so that on described web workpiece (W), go out the continuation part of described slotted hole (14), thereby limit along a long and narrow continuous described slotted hole (14) of the longitudinal axis of described web workpiece (W), described back punch die (88) limits the trailing edge (14c) away from the described leading edge (14a) of punch die (84) before described, and

Mould recess in another assembly (60) in the described assembly (60,62) is aimed at described preceding punch die (84) and back punch die (88).

2. rotary punching apparatus as claimed in claim 1 is characterized in that: comprise a center die (86) between punch die before described (84) and the described back punch die (88), wear described web workpiece (W) thereby dash, further limit described slotted hole (14).

3. rotary punching apparatus as claimed in claim 1 (10), it is characterized in that: comprise a punching die (70), it can move radially with respect to a described assembly (62), be used for along the longitudinal axis of described web workpiece (W) and described before punch die (84) and afterwards described slotted hole (14) axially spaced-apart gone out of punch die (88) on described web workpiece (W), go out another hole (12) with coming, a punching die recess (100) is arranged in described another assembly (60).

4. rotary punching apparatus as claimed in claim 1 (10), it is characterized in that: comprise being used to rotate described die assembly (60,62) powered control system (54), described powered control system (54) can be worked off and on, so that along the longitudinal separation punching of described web workpiece (W) with needs, at the position that does not need the hole, assembly (60,62) keep static, so as to make described web workpiece (W) between assembly (60,62) by and not by punching.

5. rotary punching apparatus as claimed in claim 4 (10) is characterized in that: described powered control system (54) but comprise an intermittently used motor (54).

6. rotary punching apparatus as claimed in claim 5 (10) is characterized in that: but also comprise an intermittently used clutch apparatus (56), so that described powered control system and described die assembly (60,62) are thrown off.

7. rotary punching apparatus as claimed in claim 1 (10), it is characterized in that: described assembly (60,62) be installed in only along on the bearing of web path one lateral margin setting with cantilevered fashion, described assembly (60,62) look and be enough to partly cross described web workpiece (W), so that described mould (70,84 is set along the punching axis of the needs of described web workpiece (W), 86,88).

8. rotary punching apparatus as claimed in claim 1 (10), it is characterized in that: punch die is handled cam gear (130 before comprising in a described assembly (62), 134,136), preceding punch die (84) stretches in the described assembly (62), and end at and be used in the cam follow-up device (120) that described cam gear (130,134,136) engages.

9. rotary punching apparatus as claimed in claim 1 (10), it is characterized in that: in a described assembly (62), comprise back punch die manipulation cam gear (130,134,136), described back punch die (88) stretches in the described assembly (62), and end in the cam follow-up device (121) that is used for being engaged by described cam gear (130,134,136).

10. rotary punching apparatus as claimed in claim 3 (10), it is characterized in that: in a described assembly (62), comprise punching die manipulation cam gear (130,134,136), described punching die (70) stretches in the described assembly (62), and end in the cam follow-up device (82) that is used for being engaged by described cam gear (130,134,136).

11. rotary punching apparatus as claimed in claim 3 (10) is characterized in that, comprises pounding out device (104,106), so that the recess (100,102) in band part described another assembly (60) from described assembly (60,62) that washes out is released.

12. rotary punching apparatus as claimed in claim 1 (10), it is characterized in that: on a described die assembly (62) position spaced apart, be provided with two groups described before punch die (84) and described punch die (88) afterwards, and be provided with the described mould recess (102 of at least two groups, 102), aim at respectively with described group described preceding punch die (84) and back punch die (88).

13. rotary punching apparatus as claimed in claim 1 (10) is characterized in that: comprise one second punching die (70) and the second punching recess of aiming at it (100).

14. rotary punching apparatus as claimed in claim 11 (10), it is characterized in that: the described device (104 of pounding out, 106) can be with respect to described die assembly (60,62) described another assembly (60) moves in mode substantially radially, be provided with the described telecontrol equipment (124) of pounding out device (104,106).

15. rotary punching apparatus as claimed in claim 1 (10), it is characterized in that: comprise a cavity (90) in a described assembly (62), be used for accommodating slidably described preceding punch die (84), described cavity (90) is along an axis setting, and described axis is setovered with respect to a described assembly (62).

16. rotary punching apparatus as claimed in claim 2 (10), it is characterized in that: described center die (86) is fixed on described assembly (60,62) on the described assembly (62) in, described center die limits two stamping surfaces (122,123), described stamping surface (122,123) is in the obtuse angle setting.

17. go up the method for punching press slotted hole at the web workpiece (W) that moves continuously, may further comprise the steps: make described web workpiece (W) by a pair of rotary die assembly (60,62) between, described die assembly (60, the preceding punch die (84) of the activity that an assembly (62) carrying 62) is adjacent one another are and the back punch die (88) of an activity, the back punch die (88) of the preceding punch die (84) of described activity and activity is movable when a described assembly (62) rotates, thereby sequentially outwards move from described assembly (62), and the described web workpiece of punching press (W), the leading edge (14a) of the described slotted hole of punch die (84) punching press (14) before described, the trailing edge (14c) of the described back described slotted hole of punch die (88) punching press (14), before described punch die (84) and afterwards the described slotted hole of punch die (88) punching press (14) at described leading edge and trailing edge (14a, 14c) lateral margin between (14b).

18. method as claimed in claim 17, it is characterized in that: comprise one by the step that is arranged on the described web workpiece of center die (86) punching press (W) between described preceding punch die (84) and the back punch die (88), the lateral margin (14b) between the punch die before described (84) of the described slotted hole of described center die (86) punching press (14) and the back punch die (88).

19. method as claimed in claim 18, it is characterized in that: comprise one by with described before punch die (84) and afterwards punch die (a 88) punching die (70) spaced apart on described web workpiece (W), further go out the step in another hole, thereby on described web workpiece (W), go out two holes spaced apart (12,14).