SET TO CUT LAMINATED SECTIONS
This invention relates to a set for cutting laminated sections, as presented in the main claim. The cutting assembly according to the invention is applied to the production field downstream of the iron and the steel of the rolling mills comprising two parallel rolling lines, the rolled sections being round bars, wire rods, bars, etc. . possibly upstream of the cooling plate. The cutter assembly according to the invention is used to cut the burrs of the front and rear segments of the laminated sections leaving the last rolling mill to stay and also to cut the laminated sections to size. The cutting assembly is suitable for cutting laminated sections at speeds of up to 40 meters / second and with equivalent diameters of up to 20 millimeters + 20 millimeters in the simultaneous cutting of two laminated sections. The state of the art covers rolling mills which have in their production two parallel laminated sections whose front and rear ends include faults such as geometric deformations, lack of cooling or unacceptable inclusions; These failures have to be eliminated.
• Laminated sections often have to be cut to size for further processing or for subsequent cooling on the chiller plate placed downstream. The plants of the state of the art include a cutter assembly comprising two cutters to cut to size and a burr cutter which, due to its conformation (see DE-A-1427225) has considerable problems of maintenance, adjustment problems, and requires the intervention when there is a blockage of material. Moreover, the resulting arrangement in these plants of the state of the art leads to problems of occupation of spaces that are more and more valuable in view of the overall volume of the plant; This arrangement also causes access problems, and difficulties to carry out day-to-day maintenance. Moreover, in the plants of the state of the art the waste resulting from the cutting of leftovers from the front and rear end segments generated by the leftovers is collected in two separate zones, each of which is on the axis of its own rolling line, with the resulting problems for the collection and subsequent removal of the waste. The present applicants have designed, tested and configured this invention to overcome the disadvantages of the state of the art and to achieve other advantages. This invention is presented and characterized in the main claim, while the dependent claims describe variants of the idea of the main mode. The purpose of this invention is to provide a cutting assembly that is associated downstream of a rolling mill and which delivers as its production two parallel laminated sections, the cutting assembly having a small overall volume and a lower energy consumption than those of the state of the art being financially convenient with regard to the maintenance and handling of the spare parts. The cutting assembly according to the invention comprises two cutters for cutting to size, each of which is associated with its own respective feeding set, these cutters being placed parallel to a distance between the centers equal to the distance between the centers of the two laminated sections advancing and being deviated from one another in the longitudinal direction. The cutting assembly, according to the invention, comprises a single burr cutter with two pairs of cutting elements, each of the pairs being arranged on one side of the cutter and with the cutting elements arranged in coordination with the lines that they feed the laminated sections. According to a variant of the invention the burr cutters can be used to cut a single laminated section; in this case the elements present on the inoperative side of the burr cutter will be protected for safety reasons. In this case, the burr cutters will include on the other side a suitable re-opeable element to cover and protect the rotating shafts. According to the invention, the feeder units, the cutters for cutting to the size and the burr cutter have their related motors all arranged on the same side, - which facilitates the maintenance operations on the cutting assembly and the intervention in the case of material blockages. According to a first embodiment the burr cutter has the blades that cut a section laminated at the moment with the blades that cut the other laminated section, but with the blades that cut a laminated section conveniently deflected at 45 ° or at 90 ° in relation to the sheets that cut the other laminated section so as to reduce the installed power to the extent that the burr cutting of the two laminated sections are not carried out at the same time.
According to the invention, the burr cutter is associated with a single motor, which can be installed below the fastener element of the lower leaf or it can be on the same axis as one of two fastener elements of the leaf. The cutting assembly downstream of the burr cutter comprises elements for the reception and discharge of the waste, these elements being capable of simultaneously discharging the debris coming from the burr cutters of the segments of the front and rear ends of the two laminated sections supplied to the burr cutter; These wastes are discharged and collected in a single collection element placed below. The invention also makes it possible to reduce the longitudinal distance between the two cutters also the distance between the centers of the laminated sections, thereby reducing the total volume of the cutting assembly. Moreover, with the cutting assembly according to the invention, the maintenance operations are simplified, such as adjustment and readjustment operations after some blockage. By means of the invention the laminated sections cut in the two lines have the same braking and deceleration spaces and maintain substantially the same exit position in the cooling plate placed downstream compared to the rolling lines comprising cutting assemblies of the same. state of the art. Moreover, the invention makes it possible to reduce the minimum length of the laminated section that can be discharged onto the cooling plate. The cutting assembly according to the invention comprises a first side derailleur at the entrance of each cutter that cuts to the size, so as to direct, when necessary, the laminated section within the channel leading to the burr cutter or inside the cutter. channel leading to the cooling plate or subsequent processing. The cutting assembly also includes two second side deviators placed downstream of the burr cutters to alternately feed the double channel included downstream, so that at least two plus two lines feeding the laminated section passing through are available in the output of the cutting set. The appended figures are given as a non-restrictive example and show some preferred embodiments of the invention as follows: FIGURE 1 is a side view in partial section of the cutting assembly according to the invention. FIGURE 2 is a plan view of the cutting assembly of FIGURE 1. FIGURE 3 shows on an enlarged scale a side view of the burr cutter of the cutting assembly of FIGURE 1. FIGURE 4a shows a front view of the cutting assembly of FIG. the burr cutter of FIGURE 3. FIGURE 4b shows a variant of the burr cutter of FIGURE 4a. FIGURE 5a shows a first form of embodiment of the leaf holder elements of the burr cutter of FIGURE 3. FIGURE 5b shows a second form of the leaf holder elements of the burr cutter of the FIGURE 3. FIGURE 6 shows the burr cutter of FIGURE 4a as used in cutting a single laminated section. The reference numeral 10 in the figures generally denotes a cutting assembly associated with two rolling lines where two laminated sections 11b, 11b emerge. The cutting assembly 10 according to the invention comprises for each laminated section lia, 11b a cutter
12a, 12b, to cut to size and an altering unit 13a,
13b arranged in series and offset laterally from one another by a distance between the centers equal to the distance between the centers of the two laminated sections 11b, 11b which are being fed.
In the cutting assembly 10 according to the invention, the longitudinal distance "L" between the two cutters 12a, 12b making the cut to the size is approximately 2500 to 3500 millimeters, while the distance between the centers "I" of the two laminated sections lia, 11b is approximately 600 to 900 millimeters, conveniently between 700 and 800 millimeters. The cutting assembly 10 comprises burr cutter 14, which is installed downstream of the most downstream cutter 12b which cuts to the size and is located in an intermediate position between the two laminated sections 11b, 11b. The burr cutter 14 includes a sheet fastener body 28 the two sides 29a, 29b, of which each has two pairs of counter-rotating blade fastener elements 15a, 15b, respectively, which are arranged on both sides in order to make the The first laminated section cooperates, when required, with the sheet fastener elements 15 a and the second laminated section 11 b to cooperate, when required, with the sheet fastener elements 15 b. The distance between the centers of the blade fastener elements 15a placed on one side and the blade fastener elements 15b placed on the opposite side of the chip cutter 14 is slightly smaller than the distance between the centers "I" between the two laminated sections lia, 11b so as to avoid contact between them. According to a first form of embodiment, the burr cutter 14 has a first and a second leaf fastener element 15a, 15b with its blades 16 cutting at the same time, thereby linking the simultaneous cutting of the two laminated sections lia, 11b (see FIGURE 5a.). According to another embodiment of the invention, the blades 16 of the first sheet fastener elements 15a are offset at an angle with respect to the blades 16 of the second elements 15b, thus linking the alternating cutting of the two laminated sections a , 11b. In the mode forms shown in FIGS. 3 and 4a, an impulse pinion 18 of the burr cutter 14 in association with a motor 25 is positioned lower than the fastener element of the lower leaf of each pair of a first and a second. sheet fastener elements 15a, 15b. In the form of the modality shown in the FIGURE
4b, the drive pinion 18 is on the same axis as one of the rotary arrows with which the fastening elements of the leaf 15 are associated, in this case the lower arrow. In this case the motor 25 is associated with its respective drive pinion by means of an adapter joint 26 which allows the motor 25 to be spaced the required distance from the related burr cutter 14. FIGURE 6 shows the burr cutter 14 used for Cut a single laminated section. In this case, the fastener elements of the sheet
15a are associated with the rotary arrows only on the side on which the laminated section 11 passes, while on the other side the burr cutter 14 includes a cover and protective element 27 of a removable type covering the end portion of the rotating arrows. In a successive step the cover and the protective element 27 can be removed and replaced by two sheet fastener elements 15b to allow the two laminated sections 11b, 11b to be cut out at the same time. The cutting assembly 10 according to the invention includes two first side deviators 20a, 20b, each of which cooperates with the entry of the corresponding cutters 12a, 12b to cut the size in such a way as to deflect the laminated sections 11b, 11b of alternatively within the lamination channels 22a, 22b or within the burr conveying channels 23a, 23b associated with the burr cutter 14. The cutter assembly 10 comprises, downstream of the burr cutter, the second deviators 21a 21b cooperating with the respective laminated sections 11b, 11b so as to alternately feed a double removal channel 24a, 24b, installed downstream. The cutting assembly 10 according to the invention provides, downstream of the burr cutter 14, a cyclone 17 for the discharge of waste, this cyclone being able to discard the waste arriving from the two laminated sections 11b, 11b to the same weather. These wastes are discharged and collected in a single container 19 placed below the discharge cyclone 17.