DE580176C - Switching device on trimming systems for sheets - Google Patents

Description

Circular knife hemming shears, with which the lengthways trimming of the sheets by means of circular shears and the transverse trimming is carried out using guillotine shears or circular shears, are known. The sheets to be trimmed are inserted into the circular knife hemming shears, which hold the sheets on the long sides trimmed on both sides. The sheets come from these circular knife hemming shears over a roller table to a pair of muzzle scissors or a second circular knife hemming scissors which the front and rear seams are separated from the sheet metal. The mouth scissors and the second circular knife hemming scissors are operated by a man who takes care of the equipment of the sheet and the introduction to the scissors concerned. The front and rear Sheet metal hems are often provided with lateral or central irregular sheet metal tips, to be cut off. Continued observation of these headboards and their correct retraction between the scissors knives strict the operator Man very much.

The purpose of the invention is to avoid this strenuous work and to do the right thing To make retraction of the head ends between the shear blades automatically.

In a switching device of trimming systems for sheets, for example after the trimming of the side edges, using a roller table of trimming shears for the head ends are supplied, the arrangement is made according to the invention so that between two rollers of the roller table in front of the trimming shears for the head ends one row next to one another, over the whole Sheet width distributed switch is arranged on which the irregularly shaped front edge of the sheet acts in a corresponding sequence, and that only after influencing all switches the switching of the control or drive elements necessary for the cut, the roller train and the Scissors done.

In the drawings, for example:

Fig. Ι a circular knife hemming shear system with scissors to cut off the front and rear sheet metal hems, "

Fig. 2 a circular knife hemming shear system with circular knives for cutting off the front one and rear sheet metal hem,

Fig. 3 is a section through the scissors with roller tables, Fig. 4 is a plan view.

The parts shown individually in Fig. 1 are the circular knife hemming scissors 1 for longitudinal trimming the metal sheets and the scissors 2 for cutting off the front and rear seams. Between the hemming scissors 1 and the Two roller tables are provided, one of which is in front of the scissors Has inclined roles. The rollers of this roller table 3, 4 and 5 (Fig. 1, 3 and 4) get magnetized surfaces. There can also be other roles of the roller table with a magnetized surface

Claims (1)

be allowed. The purpose of the inclination "" of the rollers of the roller table is that the Plates start up automatically on a strip 6; this bar is due to the right winker * Knives 7 of the jaw scissors 2. Between the magnetized rollers 4 and 5 are several adjacent switches 8 attached. The uncut metal sheets with their heads are never straight, and depending on how they are rolled, the outer sheet metal edges stand opposite the center: or dje 'Ijlitfe, des Facing the outer edges. In Fig. 4, the sheet 9 is after the longitudinal trimming Shown dotted, in a form that the outer BlechkärÄn protrude from the center. Since the sheets too are not exactly flat and have curvatures depending on the rolling, then through the magnetic rollers attracts the sheet metal so that it lies flat on the rollers lies. If the front edge of the sheet metal comes over the row of switches, these will be one after the other switched. An action only takes place when the edge that recedes the furthest has switched the last switch on the roller drive motor 10 such that the roller table is still a certain piece ; :; transported. This transport route corresponds to approximately the distance · of the knives 7 to to switch row 8, so that the sheet so far, in the 'scissors 7 runs that the the furthest receding sheet metal edge ι;?, still come over the scissors knife 7 "urid so that all bad parts of the front sheet metal seam are cut off stopping the roller drive motor 10, ■ di.lu if the ^ sheet *. came in peace the scissors motor 11 is switched on automatically, ' which after the cut has been made active is switched off again and the RoI- j : leiiantrivesmQtoren, ia.imd-i2 gives power, so! ■ that the sheet metal is transported further, 'iln \ - · the roller table behind the scissors. ^ some-roles 13-, 14 and 15 (Fig. 4). Magnetized surfaces, so that here too the \ Further transport the sheet metal again if possible! ■ is flat. "
£. "In addition to the roller table behind the scissors, there is also a 16"strip; which exactly j in the direction V of the alignment strip 6 of; Roll-jj ganges in front of the mouth scissors. Also the Rolling the roller table behind the. Muzzle scissors 'have an inclined position so that the sheet metal tends to always' on the straightening strip16- \ run up, on the bar 16 is slidable j -a ·; known stop: 17 (Fig. 5; -and 6) provided; This stop is by j s5 lifts a magnet: -imd can be lowered. Bumps nunt the sound of the scissors comes., sheet metal with [ the front cut edge against the; Stop, so i receives the. Schexenmotqr 11. (Fig. 4) Strom and the scissors cut off the rear piece of sheet metal. After the cut, the motor ii comes to a standstill automatically; at the same time the magnet of the stop 17 receives power, the stop 17 rises and the motor 12 receives power so that the finished sheet can continue to run. The last roller 15 causes the roller table behind the mouth shear, that the plates themselves active übereinander- _λ stack .. Thus, the plates are released from the magnetic roll behind the -Rollgang are provided at the scraper 21 from non-ferrous metal. The magnetic roller 5 of the roller table in front of the jaw scissors is also given such a stripper 22 so that the last piece of seam is stripped off. A scale is also provided on the bar 16, which precisely indicates the distance from the knives 7 of the jaw scissors 2. "In Fig. 2 the circular knife hemming scissors 1 is shown for longitudinal trimming of the sheets and the circular knife hemming scissors 23 for cutting the front and rear sheet metal hems 25 'and 26 there is again a switch grater 27, with the same effect as the switch 8 (Fig. 4). If the last switch is switched on, there is an effect on the roller motor 28, and the sheet continues to run a little so that it comes with the furthest receding edge, a little over the cutting edge of the outer scissor knives of the circular knife hemming scissors 23. If the roller motor 28 has come to a standstill, the motor 30 receives current and the insertion carriage 31 moves in the direction of the Circular knife hemming scissors 23 and. Pushes the sheet metal into their scissors knives. As soon as the sheet metal is gripped by the "scissor knives," a limit switch of the M Motor 30. reversed so that the insertion carriage 31 moves back again until the motor 30 is stopped again by a limit switch. The infeed carriage 31 is moved by • a motor .30 by means of a worm gear, no pulley and rope. The movement can also take place by means of a rack, spindle · or chain ". ·" -.- ■ · «, 'i- · · Claim :. ¹¹ p tj> ·. ' Switching device 'on pumice systems ': o; for sheets which, for example., after the - Trimming the side edges, by a •: roller table of a trimmer; for the ■ head ends are fed, -that * .: -: denotes that between two RoI- len (4, 5) of the roller table in front of the trimming shears (2) for the head ends Row of adjacent switches distributed over the entire width of the sheet metal (8) is arranged on which the irregularly shaped leading edge of the sheet (9) acts in a corresponding sequence, and that only after influencing all switches (8) to switch the control resp. Drive elements of the roller train and the shears takes place. 1 sheet of drawings