DE1452923A1 - Device for folding or for making depressions or the like. in sheet-like materials - Google Patents

Description

"Device for folding or for making indentations or like, in tabular materials "

The present invention relates to an apparatus for deforming metals and, more particularly, to an apparatus for Slitting or embossing of metal sheets to form transversely to the direction of movement a thin sheet of metal extending depressions or the like. Deformations. The invention is particularly applicable for forming generally rectangular depressions made transversely to the direction of travel of a metal sheet; however, it should be noted that the present invention can find further application and can be used to form various types of depressions in various types of sheet-like or sheet-metal materials.

The present invention means an improvement of a device for splitting or making sieve-shaped depressions with two dies which are moved in the direction of each other and removed so that the deformation tools arranged on these have transverse, recurring bends, grooves, sieves or the like. Deformations in a thin metal sheet as it migrates through the deformation tools. Known devices of this type have a first set of cams for reciprocating the dies toward and away from each other and a second set of cams for moving one die back and forth longitudinally to the other die to move the die to pull through the device. _o

»09820/0260 bad osaiNAL" ² "

In addition to this type of Siekenmaschine or Like. Deformation device, other devices have been proposed for producing transverse sieves or the like. Depressions in a thin sheet of metal; however, these latter devices have two rotating deformation or Embossing rollers between which the thin metal passes. Such devices with deforming rollers are cumbersome to set, expensive to manufacture and cause various defects and hence these types of deformation devices have become shown in practice to be unsatisfactory, especially when a large number of precisely measured deformations in must be made in a long tabular material in rapid succession.

The present invention relates to an improved device for folding or making recesses or sieves with only a set of driven cams to produce the two reciprocating movements of the dies and forward and backward movement of the one die, an improved adjustment of the stroke between the cam drive and the die movement in the back and forth movement and suitable means for adjusting the innermost position of the dies in relation to the feed level of the thin metal strip conveyed through the device.

According to the present invention, a device for folding or making depressions, sieves or the like. The general described type provided with a rotating drive cam,

90 9820/0260

~ ⁵ '"U52923

a carriage which is connected to one of the dies and is moved back and forth by the cam drive and means for Adjusting the stroke of the slide. The stroke adjusting means consist of a first link which is pivotable on a first Axis is mounted and a contact piece resting on the camshaft at one point, preferably in the form of a roller, a second link pivotally mounted on a second axis remote from the first axis and on the opposite side of the radial line of the cam, which goes through the aforementioned contact point and working with the Carriage is connected, further an element for operatively connecting the two links and means for simultaneous reversible Setting the distance of the element from the axes.

According to a further inventive feature, a device for splitting or attaching sieves or similar indentations, with reciprocating dies on a cam drive, with a swing arm at one end to the drive element and at the other end it is connected to one of the two dies; and adjustment means between the one of the parts and one end of the rocker arm for adjusting the lowermost position of the die as it moves inward. These adjustment means contain an adjustable first element with an inclined contact surface, a second element with an inclined Contact surface, an adjusting screw for moving the second element towards and away from the first element to the To change the position of the first element. Means are also provided on the adjusting screw for displaying the amount the setting of the first element.

9Q9820 / 0260 "*"

According to another feature according to the invention, a device for attaching depressions, sieves or the like. In a metal sheet as it migrates through the device on a predetermined feed line proposed according to the invention that a low pitch cam has only one cam surface, both of which have two dies toward and away from each other away and move one of these dies away from and back to the other to deform the sheet.

The advantages of the invention are intended to be based on the following description in connection with the drawing, which represents a particularly advantageous embodiment, are described. In of the drawing show:

Fig.1 is a side view of a preferred invention Education,

Fig. 2 is a generally schematic side view, partly in section, showing the operation of the preferred shows embodiment according to the invention,

Fig. 3 is a front view, partly in section, of the device according to Fig. 1,

4 shows a section along the line 4 - 4 in FIG.

5 shows a section in section, the other drawings opposite on a larger scale with the representation of the die parts in their innermost position,

Fig.6a-e are schematic views showing the working side represent the preferred embodiment shown in Figure 1.

90 9 8 20/0260 - 5 -

The drawings show only one for purposes of "illustration" preferred embodiment of the invention and are not intended to limit it.

Pig.1 shows a device for folding, bending, manufacturing. of grooves, sieves or the like. Deformations A and a thin metallic one Sheet B, which travels through the device A in a predetermined feed path, so that the device repeats, transverse deformations, for example grooves C, in the sheet B produces.

The device A includes a suitably designed frame 10 with a base plate 11, drive shafts 12 and 14, which are mounted on opposite sides of the frame 10, upper and lower swing lift assemblies 16 and 18, a Die assembly 20 with a rear opposing slide 22 and stroke adjusting means 24.

Going in detail, the cams 12 and 14 are shown for driving Set out in Pig. 1 and J, suitable drive means are available which, for the purpose of illustration, consist of a V-belt drive exist to rotate a shaft 32 with the thereon Cams attached by suitable means such as wedges ^ 4. The drive cams are arranged in pairs, one cam near one side of the frame 10 and the other cam near the opposite side of the frame 10 is arranged. As the cams and the associated Drive device on both sides of the frame are essentially the same, only the cam 12 and the drive elements,

909820/0280. - 6 -

U52923

associated with this, are described in detail; however, it should be noted that the description of one side of the device A applies equally to the opposite side of the device applies.

The cam, which is shown schematically in Figure 2, forms an essential part of the present invention and includes a sector M with a radius R which extends substantially over 180 °, a sector N with a radius R ¹ which extends in extends substantially over an amount of 90 °, a sector 0 with a slowly increasing radius from R ¹ to R and extends over an amount of approximately 40 °; and a sector T with a gradually decreasing radius from R to R ^f and extending approximately an amount of 50 °. The radius R is slightly larger than the radius R '. In practice the difference between the two radii is between 0.25 cm to 1.25 cm (.10 to .50 inches) with a larger radius R of about 21.5 cm (8.50 inches). If the length of the radius R increases, the difference between the two radii should be correspondingly larger without changing the basic setting of the cam. The relationship of the cam radius to the amount of the cam lift is very important in order to limit the inertia forces on the machine and to allow smooth operation. Correspondingly, with a diameter of 4 ^ cm (17 inches) the lift should not exceed an amount of approximately 2.5 cm (1.0 inches), as the lift or the pitch of the cam increases, sectors 0 and P are more abrupt Change which reduces the operational advantages of cam control of the moving parts of the device.

909820/0260 - 7 -

~ ^Ί ~ U52923

The minimum rise of a 43 cm (17 inches) nook is said to be approximately 2.5 mm (.10 inches) because small slopes are difficult to convert into the appropriate amounts of movement of the machine elements controlled by the cam. Of course, the same ratios of the pitch of a cam apply to different cam diameters. If the difference between the radii R and R ^{1 is} only small, a number of displays 36 are provided to display the position of the high and low parts of the cam. As will be described in detail later, the cam 12 has only one cam surface, determined by the outer contour of the cam, which not only brings the dies towards and away from the sheet B, but also moves a die longitudinally back and forth in relation to it onto the other die to pull sheet B through the jig.

In operation of the device as described, the cams 12 and 14 are set in rotation about the rocker arm assembly 16 and 18 to move back and forth and thus the to move two dies towards and away from each other. Rotation of the drive cams also causes a Reciprocation of the carriage 22 in the longitudinal direction.

The upper rocker arm 16, which has a reciprocating motion the die parts in the die 20 causes, consists of two spaced rocker arms 38, which at their foremost End are provided with a transverse pressure rod 40. The levers 38 can be pivoted on the frame by suitable means mounted, for example around a pivot 42 and they are both provided with a roller 44 attached to the outer cam surface

909820/0260> 8 -

the cam 12, 14 is applied. To ensure that these roles 44 rest against the drive cam, the rocker arm assembly 16 is provided with a means that presses it downward, such as for example a coil spring 46.

The lower rocker arm assembly 18 includes two spaced apart located lever arms 48, which are connected at their front end to a transverse pressure rod 50 ,. the that Pressure rod 40 between the lever arms 38. is similar or the same. Each swing arm 48 is pivotally mounted on the frame 10 by suitable means such as pins 52 and provided with a roller 54 mounted on the outer cam surface of the drive cams 12 and 14 are present. Appropriate means are provided for leveraging or to press swing arms 48 against the cams. In this design, the cams move the rocker arm assembly to to operate the dies of the device.

Each of the pressure rods 40, 50 is provided with a plurality of transverse plungers 60, which can be present in any number, but in the preferred embodiment one pusher is arranged near the two ends of both rods. Only the design of a tappet is described, but it should be noted that this training applies in the same way to the other tappets. Each tappet 60 contains a fork 62 for mounting a roller 64 which is rotatable about an axis 66. A shaft 68 protrudes through an opening 70 in the rod 50 and a guide pin 72 is arranged in a guide opening 74 of the rod 50 in order to prevent rotation of the plunger. The lowermost end of the shaft 68 has an inclined surface 76, which in FIG

909820/0260 _Q

a chamber 80 within the rod 50 protrudes. Also in the chamber 78 there is a wedge block 80 with an inclined cam surface which is used to abut the inclined surface 76 of the shaft 68 is provided. The wedge block 80 has a suitably threaded opening 84 for receiving an adjusting or adjusting device. Regulating screw 86 with a shaft 88, which in a suitable manner is mounted in the rocker arm 48 and is secured against axial displacement by spaced-apart collars 90 and 92. The outermost end of the shaft 88 is provided with a suitable head 94, which is designed as a key surface, to adjust the position of the block 80 in relation to the shaft 68, so that the distance between the rollers 64 and the rod 50 can be easily regulated or adjusted. To the set To indicate the position of the block 80 and, in accordance with the protruding amount of the roller 64, suitable display means are provided, such as a round scale on the outer circumference of the collar 90, with a suitable display scale on the outer surface 48 cooperates, as can be seen from Fig.1 '. In accordance with the present embodiment, the angles are the The wedge surface of the block 80 and the pitch of the threaded screw 86 are dimensioned so that one revolution of the screw drives the roller 64 increases by an amount of 0.25 mm (.01 inches).

Die assembly 20, best shown in Figures 2, 3 and 4, includes an upper die shoe 100 and a lower die shoe 102, and a pair of transversely spaced generally similar die guide plates 104 with rectangular openings 105 for receiving the ends the die shoes. Near the top of each opening 105 is a back and forth

909820X0260

- 10 -

There is a fixed rod 106 which protrudes through the upper die shoe and is anchored to it by pins 107, so that the die shoe 100 can be moved back and forth within the opening 105 to and fro. Above die shoe 100 there is an upper die 108 with a forward shoulder I09, which is similar in design to a lower die 110 below Geeenk shoe 112 with a forward protruding shoulder 111. The corresponding die shoes and dies are connected to one another by guide pins 11 "2 that allow reciprocating movement between the die and shoe; and a plurality of coil springs 114 that urge the dies back from their respective die shoes. To adjust the spacing between the die shoes, a cam shoulder 120 is at both ends the shoes 102 in place and extends into an opening 105, as shown in Fig _s. 1 disposed below the cam shoulder 120 is a wedge-shaped block with a rising inclined surface 124 and adapted to receive a threaded screw 126 having a shoulder 128 within the guide plate 104 is held to the to prevent axial displacement. Near the extreme end of the adjustment screw 126, a graduated ring 130 is connected to the guide plate 104 and has an indicator which cooperates with the display of a graduated collar 1 ^ 2 which is integral with the outer portion of the adjustment screw. To adjust the wedge block 122 with respect to the shoulder 120, the outer end of the adjustment screw 126 is provided with a head 134 which can be operated by a suitable key.

909820/0260

- 11 -

Extending downward from the die shoe 102 is a locking bolt 136, which is in the elongated slot 138 of the die guide plate 104 is included.

For adjusting the device for splitting, bending or manufacturing Sieken or the like. The die shoe 102 can be adjusted in relation to the die shoe 100 by loosening of securing bolt I56 and adjusting block 122 in relation on the cam shoulder 120. The collar provided with a scale 1J2 shows exactly the amount of the adjustment of the distance between the die shoes, so that this distance can be achieved without long attempts and can be imported without errors. The die shoes are against vertical displacement to the guide plates 104 secured and the upper and lower punches 108 and 110 of the Die are moved back and forth in relation to the die shoes by push rods 60, which by the oscillation of the swing, Lever arm extensions 16 and 18 are actuated.

In order to obtain transverse grooves or sieves or the like. Deformations C in sheet metal B, each of the die punches 108 and 14 is provided with a pair of deformation strips 140 which are separated and spaced apart by suitable spacers 142 which are attached to the punches by fastening rails 144 and screws 146, as can be seen from FIGS. The particular dimensions of the deformation strips and the spacers are not the subject of the present invention; however, they are dimensioned so that the strip B can be indented through the two lower strips which overlap the two upper strips without damaging or tearing the metal strip B. Ö09820 / 0260

As will be described below, the upper die shoe 100 and the punch 108 are longitudinal and lateral, respectively moved forward and backward in relation to the lower die shoe, so that the upper deformation bars are moved back and forth between the position shown in full line and the The dot-dashed position according to FIG. 5 * In both of these positions the movement of these deformation strips is in the direction to each other by the punch, the sieves or similar deformations in the sheet B. By adjusting the distance between the die shoes 100, 102 to coincide with the height of the depressions C, and adjusting the innermost position of the upper ones and the lower punch 108, 110 so that the corresponding deformation bars stand inwardly at a distance away of the opposite die shoes equal to the thickness of the sheet B, then the bottom of the deformation strips from the opposite spacer or die shoe out adjusting each bend of the deformation.

According to FIGS. 1 and 2, the carriage 22 contains a contact plate 150 fixedly attached to the back of pins 106 and is pushed away from the guide plate 104 by suitable means Push-away elements, such as coil springs 152, shown in FIG are. The forward and backward movement of the contact plate causes a corresponding movement of the upper die shoe and the upper punch 108, so that the deformation strips 140 can be moved back and forth as shown in Figure 5 is. The preferred embodiment of the means for moving the plate 150 in the longitudinal direction will be described in detail below will.

909820/0260, ~ ^ ~

The stroke adjusting means 24 forms an important part of the present invention and essential is an adjustable means for converting the slight slope of the cam surface on cam 12 into reciprocating back and forth movement of carriage 22. This is best illustrated in the pig .1 and 2 and the means contain a lever 16O which is rotatably mounted on a shaft g and is provided with a contact piece in the form of a roller 1β2 which rests on the cam surface of the cam 12 at a predetermined point i6j and a force-transmitting surface 164 on the side of the lever opposite the roller 162. It should be noted that a similar arrangement abuts cam 14 and this description applies equally to both stroke adjusting means. At a distance in front of the lever 160, a second lever 170 is pivotably mounted on a shaft h, the axis of which lies on the side of the axis g opposite the radial line through the point 16 ^. On the side remote from the cam 12, the lever 170 is provided with a suitable roller 172 which rests against the plate 150 and moves it back and forth and thereby has the die shoe back and forth in accordance with the movement of the roller 172. As shown the lever 170 has a fork-shaped configuration with opposing arms 174, 176 for the rotatable mounting of an adjusting screw 178 which extends between the two. A contact cylinder 180 is rotatably received on the adjusting screw 178 and is secured against rotation by conventional means, provided that the adjusting screw 178 is rotated by the key surface 172 located thereon. Near the head with the key surface 182 there is a collar 184 which can be provided with a scale in order to make small adjustments to the

909820/0 26 0 _ .14.

U52923

Display the altitude of the cylinder 18O. To get a bigger vertical A pointer 186 is to indicate setting of cylinder 180 attached to the outer end of the cylinder 18O, which is connected to a Scale 188 arranged at a suitable point on lever 170 cooperates. When using the KaIa 188 and the federal 184 is a vernier is provided which shows an exact indication of the stroke obtained by the carriage by the cam 12.

The geometry of the means 24 is shown in detail in Pig. 2. The axes g and h are spaced apart and on opposite sides of the rollers 162, 172. The distances between roller 162 and axis g and roller 172 and the axis h are stationary and are not changed by any adjustments to the cylinder 180. The slope of the cam, given as the amount χ, the roller 162 pushes back and forward and thus the supporting surface 164 back and forth by a distance y. Because the distance of the cylinder 180 from the axis g is greater than the distance of the roller 162 therefrom, the amount y is greater than the amount x. When the cylinder 18Ο by a Amount y is pushed back and forth, then the roller 172 is pushed back and forth by an amount ζ, this forward and backward movement is transmitted to the support plate 150 against the force of the springs 152. The amount ζ is greater than the amount y, since the roller 162 has a greater distance from the axis h than the cylinder I80. Correspondingly, the forward and return strokes ζ of the slide 22 are significantly greater than the slope χ of the cam 12. By rotating the adjustment tube 178 in in the reverse direction, the cylinder 180 is raised for an opposite adjustment with respect to the axes g and h.

909820/0260

Ί The expression "opposite attitude" means a decrease of the distance from the axis g and an increasing distance from the axis h or vice versa. When the Cylinder 18O in the direction of the axis, g the distance y is reduced, since the distance of the cylinder from the axis g is reduced compared to the distance of the roller 162. The amount becomes ζ also reduced in relation to the amount y, since the distance of the cylinder 180 from the axis h is increased because the distance the roller 172 remains constant. Reverse rotation of the adjusting screw 178 causes the cylinder 180 to move vertically below, in order accordingly to the amount ζ in relation to the amount j £ To increase χ and to give the amount ζ in relation to the amount y and thus an increase in the stroke on the slide 22. With this arrangement, substantial adjustment can be obtained with a comparatively compact adjuster. Essentially, the adjusting means 24 consist of a first member which is pivotably mounted about a first axis with a Roller that rests against the driven cam, a second member that is pivotably mounted on a second axis, the the first axis is offset laterally with respect to and an element remote from the first and second axes for the operational Connecting the two members and means for simultaneously reversely adjusting the spacing of the element from the Axles.

With reference to FIGS. 6a to 6b, the working steps a device for splitting or making depressions, Sieken or the like. According to the invention shown, wherein the components of the device are drawn only schematically.

909820/0280 _ ₁₆ _

The punches 108, 110 are shown as reciprocating fork-shaped parts with spaced molds in the form of strips which are intended to engage in an overlapping position. The carriage 22 is shown as fixedly attached to the punch 108 and in direct contact with the driven cam 12; however, it should be noted that stroke-adjusting Means between cam and slide are to be assumed. The rocker arm arrangements 16, 18 are shown as being pivotable and along the abutting driven cams 12 on diametrically opposite sides and operatively connected to the stamps. For the purpose of simplification, structural details are included not shown.

According to FIG. 6a, the rocker arm arrangement 16 and 18 rests on the cam 12 at a point with the larger radius R and the carriage 22 rests the cam at a point with the smaller radius R ¹ . Correspondingly, the punches 108, 110 are in their innermost position to one another and form a shown sieve C in the sheet metal B. After the cam 12 has been rotated by 45 °, the rocker arm arrangement 18 is moved from the section with the large radius to the section with the small radius of the cam and lowers the punch 110 while the sheet metal B adheres to the punch or remains impaled. The carriage 22 is just beginning to move to the right. This working position is shown in Fig. 6b. The further rotation of the drive cam 12 is shown in FIG. 6c, the slide 22 being moved to the right and thereby pulling the sheet metal B through the machine. The movement of the carriage is obtained by moving it from the portion of the cam with the small radius R ¹ to the portion

909 820/0 260 _ _{V (} _

-H52923

with the large radius of the cam. According to Pig.6d, the drive cam has been rotated 90 °, thereby moving the lower rocker arm assembly 18 from the portion with the small radius to the portion with "the large radius ; therefore the punch 110 is moved upwards to another recess in the To effect sheet B. After a rotation of the cam 12 through an angular amount of 45 °, as shown in Pig.6e, the upper rocker arm 16 moves from the section with the large radius to the section with the small radius and thus lifts the stamp 108 in. the rotation of the cam by a further 90 ⁰ moves the carriage from the portion with the large radius at the portion with the small radius of the cam and is thus rotated to the left. If the cam by a further 45 °, the elements are in The position shown in Figure 6. These steps are repeated to produce a plurality of repetitive depressions or similar deformations C extending transversely.

As can be seen from Pig. 1, precaution is made that Sheet B a predetermined train is exerted. In the preferred embodiment, there is a single arm 200 with one roller 202 resting against the tape strip, the weight of the arm on the strip as it travels through the machine exerts a slight pulling force. From Figure 2 it can be seen that a support for guiding the strip B in the gap between the existing upper and lower dies I00, 102 is present.

The invention has been explained in connection with a preferred embodiment. It should be noted, however, that the invention is not limited to the embodiment shown. Much-

908820/0 2 60 ₁₈

H52923

more, further modifications within the scope of the general inventive concept are possible.

patent claims:

909820/0260

Claims (9)

U52923 P a ^ t e η t a η s g r_i * _c_h_e_ £ 1. Device for forming transverse depressions, crevices Sieken or the like. In a sheet moving on a predetermined path with a first and a second die, first means for moving the dies away from and towards the sheet metal, second means for moving the first die along the feed direction of the sheet and in relation to the second die and in the working cycle with the To and fro of the two dies there is a driven cam with a tread that controls the movement of the dies and stroke adjusting means connecting the running surface of the cam and the first die to each other for transmission the changes in the cam surface upon the forward and backward movement of said first die, thereby characterized in that the stroke adjusting means includes a first pivot member (16O) rotatable on a first axis (g) and has a first roller (162) resting on the cam surface, a second pivot member (I70) which is rotatably mounted on a second axis (h) which is offset from the first axis (g), one at a distance from the first mentioned axis (g) and second axis (h) mounted element (180) for the operational connection of the pivoting parts (I60, 170) is present as well as mechanical means for connecting said second pivoting part (I70) to the first die (I08) and adjustment means (178,. + 80J for simultaneous reversible adjustment the distance between the elements mentioned and the elements mentioned Axles. 90S820 / 0260 - 20 - - • 20 - K52923 2. Device according to claim 1, characterized in that that the mechanical means comprise a second roller (172) attached to the second pivot lever (I70) is, a carriage (22) is connected to the first die (I08) and resilient means (152) for pressing the carriage (22) to the role (I72) are provided. 3. Device according to claims 1 and 2, characterized in that the first pivot member (I60) has a first lever with a contact surface (164) which lies opposite the second pivot member (I70) and rests against it and the second pivot member has a second Has lever for attaching the adjustment means (178, l & Q.). 4. Device according to the preceding claims 1 to ^, characterized in that the adjusting element (I80) consists of a block with a contact surface and the adjustment means includes pestle retention means for securing the block (I80) in the adjusted longitudinal position to the second Lever (170) and at a distance from the second axis (h). 5. Device according to the preceding claims, d a d ur c h characterized in that the adjusting means contain a first wedge surface on the adjustment member and a second wedge surface (178) on the second pivot link (I70). 6. Apparatus according to claim 5, characterized in that that the first wedge surface with screw thread 909820/0260 - 21 - provided bore in the block (18O) and the second Wedge surface consists of a rotatable adjusting screw (I78), which is guided in the first-mentioned hole in the block (I80) and is mounted on the second pivot member (170). 7. Apparatus according to claim 6, characterized in that that the second pivot member (I70) is provided with a first display (184) and a second display (186), the first display (184) near the adjusting screw to display the rotary position of the adjusting screw and the second Display (I86) on the block (I80) for displaying the length distance of the block is attached to the second pivot link (I70). 8. Vprrichtung for forming transverse depressions, folds, sieves or the like. In a predetermined path through the device moving sheet metal with first and second dies, first means for reciprocating the dies away from the sheet and towards it, a driven cam with a running surface for adjusting the reciprocating Movement of the dies, a swing arm for transmitting the change in the tread of the cam to the reciprocating Movement of the first die and adjustment means for adjusting the lowermost position of said first die, characterized in that the rocker arm (16) has an end near the first die (108) which Adjusting means are arranged between this end of the lever and the first die (108) and comprise a first element (80) with an inclined contact surface (82), a second element 909820/0260 H52923 (60, 68) with an inclined contact surface (76) with the inclined Faces rest against each other, an adjusting screw (88) is provided for moving the first element (80) towards and away from the second element (60, 68), which changes the set position of the second element (60, 68) and wherein the second element (60, 68) from the shingle lever arm to the first Die leads. 9. Device for folding a sheet or making indentations in a sheet that travels through it on a predetermined feed path arranged by a pair of die blocks (108, 110) opposite sides of the feed path, a driven cam (14) having a single cam surface; one first lever assembly for reciprocating one of said die blocks towards and from the feed path away, a second lever assembly for reciprocating the second die toward and away from the feed path away and a third lever assembly for moving the die blocks towards and away from each other, each of which Lever assemblies abut the cam surface and the reciprocating movement and lifting of the die blocks by the rotation of the cam is controlled. 909820/0260