DE1452685A1 - Device for bending thick sheets for steel sheets and the like. - Google Patents

Description

Hitachi Zosen Kabushiki Kaisha, Osaka-shi, Japan

Device for bending thick sheets for steel sheets

and the same

The invention relates to a sheet metal bending machine for Steel sheets and the like, in particular, it is aimed at a device in creative, regulated processes, to automatically manufacture cylindrical or tubular bodies with a cross-sectional shape consisting of more than composed of two continuous arcs. ., ._., ...._. ·

In the case of a sheet metal bending roll for steel sheets and the like Invention in particular a .Vorric.ht, ung for automatic Regulating and bending the ends of processed parts, such as In the manufacture of cylindrical or tubular objects, it is common practice to consist of more than two continuous objects Circular arcs exist when bending flat sheets.

A conventional sheet steel bending machine consists of three or more rollers that are claw-shaped or pyramid-shaped.

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So far, one has -... If one has tubes "with a cross-section which, from a series, -of curved surfaces with different curvatures, .ζ« Β _β ; an, elliptical shape, with a ge "Structural. ....... bound ^ procedures, composed., So it was. Up to now. Generally. Customary to use a gauge with a special cross-section. To use this gauge again and again; on a sheet of steel or a similarly processed part, whole or on a part of the entire sheet, to check the curvatures and thus carry out the bending process. This known process not only requires a considerable expenditure of time, it is also by no means accurate, viewed as a whole practically so pretty ineffective »

When bending steel sheets and the like by sheet metal bending rolls, the two ends of a machined workpiece are particularly affected by bending, since this determines the quality and precision of the product End 'sharing was thus carried out very "carefully and during the entire"·' working time, "wo'uTöh the 1 r ^ e it sv er were very οί * ΐ had to be interrupted; '*'" .- / -. ·· ■ _ '. ·. · ... /. > - ■■ · ■■

Furthermore, · this has become so important,; üass -eine; te ure * '' device, mi> e ^: _i, z'i3v a -Pre ^ Siae ^ ^ only 'for bending ^; den; Verwa; nd-tr -. was *: B ± e ^: E> rfinä <xmg judges: ·· see also-äüf-iine: ¥ erb «as-entrig;, this ^ erf ^ ahrei * vun * d on '

According to the invention, "" are used for the machined "workpiece used ^ the" at the same time ^ in "reverse ³ light |"" ^X

rotating and bending rolls lying on an axis at a desired angle to the axis of these rolls; the amount of discharge of a workpiece and the amount of height of the bending rollers automatically regulated; As a result, any particular bending process can be carried out by the curvature of a desired cross-section, which consists of one or more continuous circular arcs corresponding to the relative ratio of the discharge amount and the amount can be set.

You automatic regulation of the mentioned discharge amount Workpiece and the adjustment height amount of the bending rollers is carried out by a limit switch group, via which the Discharge rollers and the bending rollers are set in motion, the are arranged to work sequentially in synchronism with the movement of the exhaust rollers and the bending rollers, whereby the working hours are freely regulated; adjusting the curvature according to the cross-section of a workpiece by freely regulating the working periods of the limit switch groups.

Another feature of the invention is that the automatic control system for the discharge amount of a work piece and the adjustment height of the bending rollers is equipped with a group of limit switches with which the drive source for the bending rollers can be set variably to the working periods, so that the discharge of the work piece corresponds to ' and can be worked successfully; In addition, precautions have been taken to ensure that a group of limit switches

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tern to regulate the height of the bending rollers variable to the Working positions or periods can be operated synchronously with the adjustment height of the bending rollers Control of the height of the bending rollers, which are arranged in such a way that it is from a drive source via a stepless speed-changing one Gearboxes can be driven, carried out, and a particular shape of the workpiece can be carried out automatically be formed by the curvature of each arc of a cross-section is determined from one or more continuous, circular arcs.

Another feature of the invention resides in the mechanism with both the adjustment of the height and the bending of the ends of the front roller, which is only necessary for this bending of the ends of Work pieces is provided to be carried out automatically and after completion of the final bending process the usual Bending process can then be set automatically.

Exemplary embodiments of the invention will now be described with reference to of the drawings explained in which

Pig. 1 is an outline of the entire system for a bending process elliptical shapes according to a preferred example of the invention is 5

Figs. 2 and 3 explain the bending process}

Fig. 4 schematically shows the overall arrangement of an automatic control system in the method according to the invention; Fig. 5 is a section along the line $ -Α ... in Fig. 4;

6 illustrates the relationships between rollers and limit switches.

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According to Fig. 1, the discharge rollers for ein.Arbeitsstück 3 consist of an upper roller 1 and a lower roller 2; die.Walzen 1 and rotate uniformly in the reverse direction; the same peripheral speed, they will .angetrieben _f over eine.GetriebegrupEe disposed within a gear box 4, the workpiece 3, the device thus discharged according to the composition.

The rear roller 5 is arranged as in FIGS. 2 and 3 shown, it can move upwards and downwards in height the straight line A-B can be adjusted, creating a certain angle to the straight line A-A is formed, and the front roller 6, which only for the final bending process for workpiece 3 is used, which is in sighting the straight line C-C, which a certain angle to the vertical A-A forms, rises, is arranged on the opposite side to the rear roller 5. 7 is the lifting shaft of the rear roller, one end of which is fixed to the rear roller 5 and the other end of which is supported by the lifting roller 8, this shaft being driven by the drive shaft 11, which is driven by a continuously variable, speed-changing transmission 10 is driven by a drive source 9 and is raised in the direction of the straight line A-B. The drive shaft 11 has a Screw part 12 which is screwed in over the nooke 15 in order to operate the upper limit switch 13 and the lower limit switch H of the rear roller 5. The cam 15 has a guide member (not shown in the drawing) so that they are in the axial direction of the drive shaft 11 in accordance with the Rotation of the shaft can move, these .upper and lower limit switches 13 and 14 'eo are attached ^> to the adjustment

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can be · This allows the upper and lower limit positions are respectively controlled, whereby jejäe any type of ge * ^-: screw shaft 16 ^ changes the relative Läge to Nooke 15

shaping processes, e.g. for elliptical "shapes and the like, becomes possible.

17 and 18 are limit switches for upward movement - the stroke - drives 9 for the rear roller; 19 and 20 are limit switches, with those, the lowering drive 9. for the rear roller in Gear is set; these limit switches are so to the adjusting screw shafts 2.1 and 22 arranged so that they have the corresponding operating positions or periods and are freely adjustable are; they are also parallel to the screw rotatloh wave 24 the Nooke 23 to operate these perimeter switches— group arranged. Both ends of the rotary shaft 24 are connected via clutches 25 and 26 to the drive shaft 27, which from Gear housing 4 protrudes; also with the transmission shaft 29 of the drive source 28 for the return to the zero point of the nooke 23 '

Furthermore, a drive source for the front roller 6 is provided at 30 as well as an elevator 32 which comprises a lifting shaft 31, one end of which is fastened to the front roller 6 and through the drive shaft 34 of FIG. ; this drive source 30 is driven via the gear 33; this can be replaced, for example, by a stepless, speed changing gear; the drive 'welle34 ^ has a screw part 35, which in a cam 38' for initiating the lifting movement of the front roller and the operation of the Begrenzüngsregelschalter 36 and ^37; UKD discharging rollers 1 ₁ 2 is screwed, said limit switch to

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the adjusting screw shaft 39 is seated so that the respective Positions to the positions of the squat 38 are variable. The nooke 38 is also reduced in size by a guide part (not shown), so that it can only move along the axial direction of the drive shaft 34.

40a is a limit switch that is used to interrupt simultaneously the downward movement of the front roller 6 is used, which is so designed is that it comes into action according to the specific discharge amount of the workpiece 3 and the upper and lower Start discharge rollers 1 and 2 and engage clutch 25; 40b shows the limit switch 40a in action, the is fastened in a position corresponding to the final bending length on one side of the workpiece 3.

The working method is now to be found in molding a tubular Partly with an approximately elliptical cross-section through a device according to the invention are described: first the limit switches 13j14,17,18,19,20,36,37 and 40 corresponding to the Positions in which a particular cross-sectional shape of a workpiece is to be shaped, adjusted j one end of a work piece 3 is hydraulic or some other mechanism set firmly clamped between the discharge rollers 1 and 2} the drive shaft 30 of the front roller 6 is driven by a Push button control started, which started bending will. Then the front roller 6 is set in motion, thereby lifting and bending, as shown in FIG. 2} the lifting movement is interrupted as soon as the nooke 38 is displaced

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ORIGINAL S? 4SP £ GTED

and the drive shaft 34 rotates so that the limit switch 36 comes into action. At the same time are the top and lower discharge rollers 1 and 2 are adjusted so that "the workpiece 3 is discharged with bending. Brings the projection 40b press the limit switch 40a to work, the discharge rollers 1 and 2 stop, and the final bending work is finished.

If, however, the work roll 6 begins its downward movement, the discharge rolls 1 and 2 stop working and the Nooke 38 sets the limit switch 37 in operation, the front roller 6 stops, while the rotary shaft 24 begins to rotate as soon as the start upper and lower discharge rollers 1 and 2, and at the same time the clutch is engaged. Through this tarnishing comes the working process in the main stage additionally becomes the Coupling 26 released «The Nooke 23 shifts according to the rotation of the rotary shaft. whereby the limit switch 17 is actuated and brings the drive source 9 in motion, whereby the rear roller 5 is raised. Now the work piece 3, which was also bent, can be carried out and a smooth one Shaping can be done at the transition of the part with a larger diameter to the smaller diameter of an approximated ellipse can be achieved. The Nooke 15 then moves to the left while the rotary shaft continues to rotate, and the nooke 15 activates the limit switch 13 when the rear roller 5 moves to a " Stop comes, and circular arcs with a certain curvature are formed when the workpiece 3 is discharged by the rotation of the discharge rollers 1 and 2.

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H52685

ie Nooke 23 then activates the limit switch 19, when a restart of the drive shaft 9 is caused in the reverse direction, and the rear roller starts with the Downward movement, so that the formation of a next transition from a part with a smaller diameter to one with a large Diameter can begin. Then the rear roller 5 stops moving downward due to the operation of the limit switch 14 by moving the nooke 15 to the left; the formation of the transition part now turns to the shaping of an arcuate one Partly with a certain curvature; the limit switch 18 is actuated by the nooke 23, whereby the lifting movement of the rear roller 5 begins, and it becomes arcuate with a new one Shaping the transition connection before the part with the larger diameter to the part with the smaller diameter started; the nooke 15 shifts to the right again, causing the perimeter switch 13 comes into action when the rear roller 5 comes to a stop and the shaping of the next sheet one certain bulging can take place; the nook 23 actuates the limit switch 20 so that the rear roller 5 is lowered again is, whereby the design of the last circular arc-shaped connection of the larger with the smaller diameter is performed. If the cam 15 shifts to the left and the limit switch 14- is actuated, the shaping takes place of the last of a certain curvature by discharging of the workpiece 3, so that the tubular shape with an approximately elliptical profile is completed; achieved the cam 23 the right end, a stop switch (in the

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.Drawings not shown) the discharge rollers 1 and 2 actuated, so that the discharge «alζen are stopped while the Nooke 23 is returned to the starting position by releasing the clutch 25 and engaging the clutch 26. This is also done by starting the drive source for the zero point return 28. So becomes each stage of work is automatically completed, and each particular cross-sectional shape is ready after the start of the sieving process, e.g. with elliptical cross-section, mainly due to the push button control possible.

In addition, the final bending process can be performed with any desired curvature automatically and reliably be possible if and when the setting of the respective working positions of the limit switches 56, 37 and 40 was previously set to the final dimension, etc., according to the cross-sectional curvature of the workpiece. Of course the device according to the invention is connected to the system made up of three rollers, the upper and lower discharge rollers and the rear roller; in a final bending process this will be performed on another machine used exclusively for this purpose, and it is just as possible to use the front roller 6 to be operated by hand, as before, even with a bending machine, which is composed of four reels, so that can be said that the present facility can cover a large area can be used.

Erfindungsgemäsa _ö it is also possible to choose a lifting speed of the bending rollers freely and continuously, so that smoothness, curved surfaces can be formed without Unrege1- ¹ 9 0 9816/0 ISS

moderation, there is an infinitely variable speed changing gear between drive shaft and drive source for the elevator for the bending rollers (front roller and rear roller) is switched.

The second embodiment of the invention will now be referred to the drawings 4, 5 and 6 are described: The composition of the discharge rollers for the workpiece 3 is very similar to the previous embodiment; i.e., the upper roller 1 and the lower roller 2 are arranged in such a way that the rotational force is transmitted through a gear housing 4 arranged transmission group is transmitted and this is evenly rotate in the opposite direction and at the same peripheral speed so that the workpiece 3 can be discharged; the bending roller 5b is also arranged to rise in the direction of the straight line A-B which defines one Forms an angle to the straight line A, and it is moved and controlled by hydraulic devices or the like, so that the workpiece is bent into cylinder tubes with a special cross-sectional shape can be. The arrangement is designed so that the control of the rotational movement of the upper roller 1 and the lower roller 2 or the Control of the discharge amount of the workpiece 3 via a roller drive control device 41 can be carried out, and the regulation of the stroke movement of the bending roller 5b is also carried out by this Control device 41 by controlling a hydraulic circuit (not shown in the drawing) for driving the bending roll 5b performed.

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The aforementioned control device 41 is composed by the limit switches 47,48,49 and 50 are operated by cams 43, 44, and 46 of a certain shape, these sit on a camshaft 42.

The limit switches 47, 48, 49 and 50 are further arranged so that that they are attached to the larger bevel gears 51,52,53 and 54 and their bearings relative to the cams 43,44,45 and 46 can be freely adjusted using handwheels 59, 60, 61 and 62, whereby the limit switch positions are set, each on the shaft of the smaller bevel gears 55,56,57 and 58, which are in engagement with the larger bevel gears, applied is. That is, by changing the position in relation to the cams to 46 can be activated by the limit switches 47 to 50χχϋ * Rotational movement will be interrupted or the slow speed for the Rolls 1 and 2 are run. At the same time, the hydraulic circuit for the bending roller 5b is in the direction of lifting or Lowering opened and operated in such a way that the lifting or lowering movement of the bending roller 5b is started, and also switching over from lifting to lowering can be carried out here. Besides that the arrangement is designed so that both ends of the bending roll 5b is equipped with limit switches 63, 64, 65 and 66 for stopping the bending roller 5b and for starting the rollers 1 and 2 are, which can then be actuated after the movement of the bending roller 5b «These limit switches 63 to 66 can be directly or indirectly through the bending roller 5b are operated, the limit switches 47 to 50 and

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I η ο L υ υ - 13 -

63 to 66 the bending of cylinders or tubes, with cross-sections Numerous curved surfaces placed next to one another make any number possible. The number of cams should be 43 to 46 ■ corresponding to that of the limit switches 47 to 50, which can shape freely according to the most varied of goals be determined. The drive of the camshaft 42 of the control device 41 is via gears 67 and 68, which are attached to the roller 2, the continuously variable, speed-changing transmission 69 and the zero point reset device 70 of the control device 41 attached are to be executed. ■

The control device 41 is controlled to the zero point from both sides by the zero point resetting devices 70 and 71, and the starting position of the cams 43 to 50 is such that an accurate Setting is possible.

The bending of tubes with an approximately elliptical cross-section according to this arrangement, the following is explained:

First, a workpiece 3 is up to a certain position between rolls 1 and 2 are inserted and the zero point adjustment of the automatic control system is carried out; afterwards will be the control handwheels 60 to 63 are rotated, and this sets the working position of each limit switch 47 to 50, so that the arc length of the curved surface of a certain cross-section of the workpiece can be met, with the starting point of each nooke 43 to 46 is used as a reference value; then the speed of the camshaft 42 is set by means of a stepped

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loose, law-changing transmission 70 regulated; the The working position of the limit switches 64 Ms 67 is also regulated and so the adjustment to a special cross-sectional shape · ended. With the beginning of the notation of waves 1 and 2, this becomes Workpiece 3 is discharged forward to the bending roller 5b by a certain distance when the cam 43 pushes the limit switch 47 operated so that the rollers 1 and 2 stop or their speed so that the bending roller 5b begins to lift and comes to a stop, e.g. after the limit switch .65 has been actuated. A curved surface (a ^ ogen) of the Work piece 3 is formed in this process by the Stopping the bending roller 5b, the rollers 1 and 2 come to the usual discharge speed from a stop or from a Slowly running, whereby the discharge of the workpiece 3 is made, whereby the limit switch 48 to one after the other

and

50 and 64 to 66 are actuated when the bending process is finished will"

Any final cross-sectional shape can be obtained using the method described above of the workpiece 3 can be achieved, e.g. »an exact circle, an approximate ellipse, etc. Any arbitrary profile, which may consist of continuous sheets, can preferably be freely determined and established by the working positions the limit switch in any desired number for each POI are provided, and by continuing to change the rotational speed of the camshaft 42 via the stepless, speed-changing Transmission 70 is regulated * Everyone can do it

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\) U ν '

Cylinders or pipes of any cross-section are automatically generated be formed by - as previously described - the cross-sectional shapes are set in advance.

According to the method with the device according to the invention, it is
both possible to automatically manufacture articles with a high precision, having a precise and smooth surface and having any cross-section consisting of continuous arcs, this device as a whole being simple, cheap and fast
free of any unpleasant maintenance and therefore very economical, so that this leads to an unusual reduction
the production costs are contributed without the disadvantageous efficiency factor being discussed at all at this point
shall be. ,

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Claims (1)

~ 16 - Pa t en tans ρ r ü ehe 1. Sheet metal bending machine for steel sheets, plates and the like. With a number of upper and lower workpiece feed or discharge rollers, which rotate evenly in the opposite direction and with bending rollers, which are designed so that they are in a linear direction, which is at a special angle to the straight line between the two axes of the discharge rollers, are raised, and with an automatic shaping device through a group of limit switches with which the drive source for the bending rolls, which are in their working position (or the working periods) are variable, can be set in motion so that they are started one after the other according to the discharge amount of a workpiece are put into action, and that a stroke control for the bending rollers is carried out by this - designed to be driven from the drive source through a continuously variable speed changing transmission are driven, via devices through which they are synchronized with the lifting movement of the in the working position (period) variable bending rollers are put into action, whereby the " Curvature of each arch of a cross-section is determined, which consists of one or more continuous arcs, and that automatically the particular desired shape of the Work piece is carried out «, I. Plate bending machine for steel sheets and the like. With a number of upper and lower workpiece discharge rollers, which are uniform 909816/0155 ORIGINAL '- 17 - ■ rotate in opposite directions, and with a front and a rear roller, which are designed to be on a straight line Line which are at an acute angle to the axis connecting the axes of the discharge rollers, and with a final bending control device, characterized by a screw part in the drive shaft of a lifting device which surrounds the lifting shaft ei tu * c ti and the two ends of the front roller are stored in the »limit switch for lifting and stopping the front määxxhbi roller and for starting the upper and lower discharge rollers as well as limiting switch for stopping the lowering of the front roller and starting the upper and lower rollers parallel to this drive shaft xHxgBssJfliuxsiKS, so their locations and
can be freely set / that the two limiting Switch groups are arranged in such a way that they are screwed into the drive shaft parallel to the drive shaft when they are moved Nooke are actuated, which takes part in the rotation of the drive shaft, and that continues at the end along the workpiece boundary se halt he is intended to temporarily stop the drive stop the lower and upper discharge rollers designed so are that they correspond to a freely determined amount of the workpiece come into action. 3. Sheet metal bending machine for steel sheets and the like. With a number of upper and lower workpiece discharge rollers that are uniform turn in the opposite direction, and with bending rollers that run on a straight line at a certain angle to the two- ' 909816/0155 ORIGINAL IH the straight lines connecting the axes of the discharge rollers are characterized by an automatic control of the Discharge amount of the workpiece as well as the lifting amount of the bending rollers and by automatically carrying out a special bending process by the curvature of each arch of the desired Cross-section, which is composed of one or more continuous arcs, is set »namely due to the relationship between the discharge amount and the lift amount. 4. Sheet metal bending machine for steel sheets and the like. Die_automatisch carries out a special bending process to regulate the discharge amount of a workpiece and the stroke amount of bending rollers, with an automatic work control system with a number of upper and lower workpiece discharge rollers that are even rotate in the opposite direction and with bending rollers, which are on a straight line at a special angle to the two discharge rollers connecting straight lines, marked by a Limit switch group with which the discharge rollers and the Bending rolls regulated or «controlled so that the respective Working positions (periods) can be freely set, whereby the limiting so-holder group is arranged in such a way that that they are sequentially synchronized with the movement of the application rollers is pressed and free the arch of each arch of a Cross-section is determined, which is composed of one or more continuous sheets of the workpiece by the working positions (periods) of the limit switch group being controlled. 909816/0155