CS197834B1 - Automatic line for cutting the wound up material to the long semiproducts and non-paraller side edges - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to an apparatus for shearing, and in particular to an automatic line for cutting coiled material. It is mainly used in the electrical industry to cut rolled steel into long blanks for spiral magnetic conductors.

An automatic material cutting line is known which can produce semi-finished products with non-parallel edges (see US Patent No. 3944633). This line includes, in a technological sequence, a device for unwinding, pressing and shifting material, cross-cutting shears, a skewing device with circular shears, a device for measuring the length of the workpiece and a device for catching the cut workpiece.

To produce a blank with non-parallel edges, the wound material is unwound and the length determined by adjusting the sliding stops on the blank length measuring device, cut with cross-section scissors and after turning the cut blank to the required angle using the sliding slides on the oblique device. cut, cut through the longitudinally sliding disc shears of the device.

As is apparent from the foregoing, the wound material is trimmed on a flat surface the length of which is not less than a predetermined length of the blank to be cut. This results in high production costs of the flow line due to the considerable demand on the metal material. In addition, the range of workpiece lengths to be processed on this line is limited by the economically efficient dimensions of the operating areas. If we need semi-finished products with a length of 197 834

197,834 hundred meters, there is a need to manufacture them from a large number of parts connected at the transverse edges. However, this not only reduces the performance of the entire technological process, but also the manufacturing accuracy of the blanks, and also requires a high proportion of labor.

These disadvantages would be avoided in another known automatic line for cutting coiled material into long blanks with non-parallel side edges.

This line has a unwinding device, cross cutters, workpiece metering device, skew cutters to cut material into blanks with uneven edges that are mounted on a transversely movable carriage to a crossbeam conveyor, including a copy template and pulley. The line also has a winding device, all in technological sequence.

Cutting the material along the oblique line provides a combination of the transverse displacement of the shears with the longitudinal displacement of the workpiece on the described flow line, which is wound onto a disc inserted into the winding device. This eliminates the dependence of the length of the automatic line on the length of the blank to be cut.

Measurement of the length of the workpiece blank is ensured in the described automatic line by a wheel speed counter which rotates under the action of the running material. The disk is kinematically coupled to a copying template of the transverse control device for the shears and their speed counter is connected via a control circuit to the shear drive for the cross-section.

The described design of the length encoder and the connection of this device to the drive of the scissors and the copying template of the transverse displacement device make it possible to produce blanks for the spiral magnetic conductor and to maintain its length and width with sufficient accuracy.

For these blanks, in addition to both dimensions, thickness is important, the accuracy of which is determined by the tolerances of the rolled material.

The spiral magnetic conductor is produced by not winding two blanks with tapering long edges which are joined at a longer transverse edge to a mandrel of a specified geometric shape. This magnetic conductor consists of a plurality of rectangular strips of varying width, forming a shape close to a circle. Obviously, variations in the thickness of the blanks can disrupt this shape. At the same time, due to the fact that a large number of layers are formed during winding, a variation in the thickness of the blanks, even if within the tolerances for the material, results in the permissible variations in the geometric dimensions of the magnetic conductor cross-section. In addition, since the thickness of the workpiece varies within a given tolerance over its length, the cross-sectional area of the magnetic conductor becomes variable, causing the electrical characteristics to be unstable. Therefore, in the case of upward thickness deviations, as most commonly occurs in practice, in order to maintain the shape and dimensions of the cross-section of the magnetic conductor, it is desirable to reduce the number of wound layers, in other words, to shorten the length of the blank.

In the manufacture of helical conductor blanks on an automatic line of the described construction, additional devices are required to cut off the excess lengths of the blanks. Furthermore, the productivity of the process and the cut pieces of material decrease

197 834 consists of waste. In addition, if it is desired to produce a longitudinally folded blank, this additional machining results in a disproportionality of the front side of the cuttings which are joined and a permanent inclination in the oblique cut.

It is an object of the invention to overcome these disadvantages.

In order to achieve this object, the present invention aims to provide such an automatic line for cutting coiled material into long blanks with non-parallel side edges, which would guarantee automatic length compensation of the blanks depending on the thickness of the material being cut by constructing a metering device semi-finished products.

This task is solved by including an automatic line for cutting coiled material in long blanks with non-parallel lateral edges including cross-cutting shears, shear beveling scissors and a device for measuring blanks mounted on a solid base between the material roll in the unwinding device and a disc with semifinished products in the winding device in a technological sequence. In this case, the bevel cutters are mounted on a transversely movable carriage of the device intended for transverse displacement thereof and comprising a copy template and a roller. The device for metering the blanks is connected via a control ring to the drive of the shears for cross-section and, schematically, to the copying template of the device for transverse movement. According to the invention, the device comprises a feed disc contacting the workpiece disc in the winding device and a longitudinally movable table supporting the feed disc. A transversely movable carriage of the transverse displacement device is mounted on said longitudinally movable table.

This achieves that the cross-cutting shears start to squeeze when the blank disc in the winding device reaches the calculated diameter. In a wound disk of calculated diameter, the number of layers determining the length of the workpiece depends on the thickness of the material.

The connection between the longitudinally movable workpiece length measuring table and the transversely movable carriage of the transverse displacement device ensures the smoothness of the oblique cut line and the determined difference between the workpiece widths along its transverse edges. This, in turn, makes it possible to maintain, in the manufacture of the blanks longitudinally folded, a continuous oblique cutting line over the entire length of the folded blanks.

The automatic line constructed in accordance with the present invention provides for an automatic correction of the length of the workpiece as a function of the thickness of the material being cut, while maintaining the specified workpiece widths along its transverse edges. In the manufacture of spiral magnetic conductor blanks, this determines the stability of its electrical values.

In a particular case, the transversely movable carriage of the transverse displacement device may be rigidly connected to the punching template. In this case, the roller working together with the copying template can be mounted on a base plate with a controllable feed, which ensures the simplest and most reliable connection between the feed disk and the copying template of the transverse displacement device.

187 834

In view of the simplicity of the construction of the connection between the feed disc and the drive of the cross-cutting drive, it is expedient for the longitudinal movable table to be provided with a stop and a control circuit for the cross-section drive for the cross-cut by an end switch fixed to this stop.

In the following lines, the invention will be explained with reference to one embodiment of the drawings, in which: Figure 1 shows an automatic line according to the invention for cutting coiled material into long blanks with non-parallel edges in a schematic illustration; Figure 2 is a partial top view of the same automatic line; Fig. 3 is a blank which is produced by trimming on the current lines shown in Figs. 1 and 2; Fig. 4 is a cross-sectional view of Figs. IV-IV of Fig. 3; Fig. 5; compared to FIGS. 3 and 4, the scale is enlarged, FIG. 6 is a cross-sectional view of VI-VI in FIG.

The automatic line for cutting the wound material into long blanks with non-parallel edges also comprises, in succession, a unwinding device 1 with a mandrel 2 for a disc with the material ready to be cut, a pressing device ^{28 with a} spring bar ⁸ , circular scissors 6 for longitudinal cutting of the material to parallel-edge strips, circular scissors 2 for oblique cutting to cut strips into long blanks with non-parallel edges, a device 8 for measuring the length of the blanks and unwinding the device ^{8 with a} mandrel 10 for blanks with blanks produced during cutting. The mandrel is connected to a rotary drive 11 (Fig. 2) comprising an electric motor 12 and a gear 13.

Said automatic line operating devices are provided on a common stable base plate 14 (FIG. 1). The skew cutters 2 are provided with a transverse displacement device 18 comprising a transversely movable carriage 16 on which the shears 2 are mounted, a copying template 17 (Fig. 1) and a roller 18 (Fig. 2) being constructed. as a disc which is in contact with the copying template 17 and which is disposed on a slide 1g mounted in the guides 20 of the stable base plate 14. The guides 20 are arranged perpendicular to the direction of movement of the material. the split nut 22 is mounted on a stable base plate 14 (FIG. 1), while the rotating handle 23 (FIG. 2) is led out. The guide screw 21 serves to adjust the pulley 18 in relation to the copying template 12. The distance measuring device g comprises a feed disc 24 (FIG. 1) and a longitudinally movable eth 25 which bears this table in the guides 26 (gbr. 2). ) stable base plates 14 parallel to the direction of movement of the blanks. The feed disc 24 (FIG. 1) is located in the immediate vicinity of the mandrel 10, so that when the workpiece is wound onto the disc, its surface contacts the surface of the workpiece disc. In this case, the axis of the feed disc 24 lies at the level of the horizontal axis of the mandrel 10, the working plane of the cutting edge g for cross-section, the longitudinal cutter 6 and the shears 2 P ^r0. the blank runs through this wheel.

Other feed disk arrangements are also possible, but with respect to the metering accuracy of the blanks, the described arrangement is preferred.

In the guides 27 of the longitudinally movable table 25, which are perpendicular to the guides 26 (FIG. 2), a transversely movable carriage 16 (FIG. 1) of the transverse feed 15 is positioned, thereby achieving a kinematic connection of the feed disc 24 to the copying template 17. 2),

The described variant of said kinematic connection is preferred, but this does not preclude the possibility of other constructional arrangements, for example the connection of the copying template with a toothed rack and a longitudinally movable stand.

A stop 28 is disposed on the face of the longitudinally movable table 25 (FIG. 1) on the side facing the movement of the material.

The cross section cutter control circuit includes a limit switch 29 mounted on the pedestal of said shears and actuated by a stopper 28 at the end of the stroke of the longitudinally movable table 25. This stroke is conditioned by displacement of the feed disc 24. after turning on mandrel 10,

The automatic line function will be described in the following text:

From the roll 10 (FIG. 1) which is wound on the mandrel 2 of the unwinding device 1, the material to be cut, i.e. the belt 31 is guided through the pressing device J and the cross-sectional open jaws J to the longitudinal cutter discs 6 one or more pairs of parallel blades. The spring bar 6 of the pressing device 3 brakes the belt 11 somewhat, thereby creating the tension required at the time of cutting. The belt 11 is then cut into two or more rectangular belts 12 by circular shears (FIG. 2).

As they pass through the transverse shears 2, these strips are cut into two blanks 33 ^with non-parallel edges and, after being pushed over the feed disk 24 (FIG. 1), are wound onto the driven mandrel 10 of the device J.

As long as the width of the strip 31 is equal to the total width of the two blanks 33, no longitudinal cutting is performed. In this case, the knives are removed from the shears (> for the cross-section) and the belt 31 is moved immediately to the skews 2 of the oblique cut.

Before switching on the scissors, the transversely movable carriage 16 of the transverse displacement device 15 is adjusted by rotating the lead screw 21 on the pulley 18 so that the position of the blades of the bevel shears 2 corresponds to the specified transverse edge width of one of the blanks. side edges of the belt 32.

Before the ends of the blank 33 are inserted on the mandrel 10, the transversely movable carriage 16 is moved in the guides 27.

As the workpiece 33 is wound onto the mandrel 10, the feed disc 24, which is in contact with the workpiece disc 34 (FIG. 1), moves the movable table 25 firmly connected thereto against the material movement. The transversely movable carriage 16 is also moved in the guides 27 of this table. Copying template 17 firmly connected to the trolley (fig.

2) in this case it moves relative to the roller 18 and continuously moves the transversely movable carriage 16 perpendicular to the direction of movement of the material, overcoming the resistance of a spring (not shown), pressing against

197 834 trolley for pulley 18.

As soon as the diameter of the spinner 34 (FIG. 1) reaches the crushed diameter, the transversely displaceable table 25 travels with a stopper 28 to the limit switch lever 29 of the shear drive control circuit 5 of the cross-section. This turns on the drive and cuts off the blank 33.

Since the length 1 of the workpiece is determined by the number of layers wound on the disc of a given diameter and this number depends on the thickness of the material, it is clear that with a plus tolerance of the strip thickness the length will be slightly smaller. . In other words, due to the particularities described in the construction of the device 8 for measuring the length of the workpieces, the workpieces prepared by cutting (FIG. 3) have a constant cross-sectional area

S - <Th (1), which is parallel to the long edge of the blank, forming a right angle to the side edge (Fig. 4).

As already mentioned, these blanks are used to produce spiral magnetic conductors. In the simplest and most appropriate case, such a magnetic conductor forms a planar spiral (FIG. 5) of blanks which are connected on a wide front side and which are tapered longitudinally in cross section having a circular shape (FIG. 6). The area of the ring depends on the overall width of the strips that make up the ring and on the θ 7 of each strip. If the determined widths of the blanks along its side edges are constant, and if the circumference of the mandrel to which the blanks are wound in the manufacture of magnetic conductors is calculated, the number of bands in the magnetic conductor cross-section determines the total width of the bands.

Cutting on the described automatic current line guarantees a constant surface area with i (1) cross-section of the blank and thus a constant flat cross-sectional area of the spiral magnetic conductor, which in turn decides on its electrical values.

The bevel angle of the workpiece slanted edge or the configuration of this edge is determined by the shape of the work surface of the copying template. In doing so, it provides for a schematic connection of the feed disc 24 to the copying template 17. that a predetermined difference is achieved between the transverse edge widths of the blank.

Thus, the automatic line according to the invention provides automatic length compensation of the blanks according to the thickness of the material to be cut. This makes it possible to increase the quality and working efficiency of the spiral magnetic conductors and to avoid material discard.

SUBJECT OF THE INVENTION

Claims (3)

SUBJECT OF THE INVENTION 1. Automatic line for cutting coiled material into long blanks with non-parallel side edges, including cross-section shears, bevel cutters and length measuring devices, which parts of the automatic flow line are 197 834 located between the roll and the material in the unwinder and between the roll with the blanks on the take-up reel and in the technological sequence are mounted on the base plate, the bevel cutters being placed on the transversely movable carriage for transversely moving the copy and a roller, wherein the workpiece length measuring device is connected to the drive of a transverse displacement, characterized in that the workpiece length measuring device (8) is provided with a feed disc (24) contacting the workpiece blank. in the unwinding device (9) and a longitudinally movable table (25) supporting the feed disc (14), wherein a transversely movable carriage (16) of the transverse feed device (15) is arranged on the longitudinally movable table (25). Automatic liqueur according to claim 1, characterized in that the transversely movable carriage (16) of the transverse displacement device (15) is rigidly connected to the copying template (17), wherein the roller (18) is in cooperation with the copying template (17). ), is slidably mounted on a stable base plate (14). An automatic line according to claim 1 or 2, characterized in that the longitudinally movable table (25) is provided with a stop (28) which is coupled to a limit switch (29) of the shear drive control circuit (5) for cross-section. 6 drawings